tweak tox.ini to pass tests

an -> a

.gitignore

@@ -15,3 +15,6 @@ env/
 .pydevproject
 tests/test_bugfix.py
 htmlcov/
+venv
+venv3
+scratchpad

.install_mongodb_on_travis.sh

@@ -0,0 +1,27 @@
+#!/bin/bash
+
+sudo apt-get remove mongodb-org-server
+sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 7F0CEB10
+
+if [ "$MONGODB" = "2.4" ]; then
+    echo "deb http://downloads-distro.mongodb.org/repo/ubuntu-upstart dist 10gen" | sudo tee /etc/apt/sources.list.d/mongodb.list
+    sudo apt-get update
+    sudo apt-get install mongodb-10gen=2.4.14
+    sudo service mongodb start
+elif [ "$MONGODB" = "2.6" ]; then
+    echo "deb http://downloads-distro.mongodb.org/repo/ubuntu-upstart dist 10gen" | sudo tee /etc/apt/sources.list.d/mongodb.list
+    sudo apt-get update
+    sudo apt-get install mongodb-org-server=2.6.12
+    # service should be started automatically
+elif [ "$MONGODB" = "3.0" ]; then
+    echo "deb http://repo.mongodb.org/apt/ubuntu trusty/mongodb-org/3.0 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb.list
+    sudo apt-get update
+    sudo apt-get install mongodb-org-server=3.0.14
+    # service should be started automatically
+else
+    echo "Invalid MongoDB version, expected 2.4, 2.6, or 3.0."
+    exit 1
+fi;
+
+mkdir db
+1>db/logs mongod --dbpath=db &

.landscape.yml

@@ -0,0 +1,22 @@
+pylint:
+    disable:
+        # We use this a lot (e.g. via document._meta)
+        - protected-access
+
+    options:
+        additional-builtins:
+            # add xrange and long as valid built-ins. In Python 3, xrange is
+            # translated into range and long is translated into int via 2to3 (see
+            # "use_2to3" in setup.py). This should be removed when we drop Python
+            # 2 support (which probably won't happen any time soon).
+            - xrange
+            - long
+
+pyflakes:
+    disable:
+        # undefined variables are already covered by pylint (and exclude
+        # xrange & long)
+        - F821
+
+ignore-paths:
+    - benchmark.py

.travis.yml

@@ -1,15 +1,101 @@
-# http://travis-ci.org/#!/MongoEngine/mongoengine
+# For full coverage, we'd have to test all supported Python, MongoDB, and
+# PyMongo combinations. However, that would result in an overly long build
+# with a very large number of jobs, hence we only test a subset of all the
+# combinations:
+# * MongoDB v2.4 & v3.0 are only tested against Python v2.7 & v3.5.
+# * MongoDB v2.4 is tested against PyMongo v2.7 & v3.x.
+# * MongoDB v3.0 is tested against PyMongo v3.x.
+# * MongoDB v2.6 is currently the "main" version tested against Python v2.7,
+#   v3.5, PyPy & PyPy3, and PyMongo v2.7, v2.8 & v3.x.
+#
+# Reminder: Update README.rst if you change MongoDB versions we test.
+
 language: python
+
 python:
-    - 2.5
-    - 2.6
 - 2.7
-    - 3.1
+- 3.5
-    - 3.2
+- 3.6
+- pypy
+
+env:
+- MONGODB=2.6 PYMONGO=3.x
+
+matrix:
+  # Finish the build as soon as one job fails
+  fast_finish: true
+
+  include:
+  - python: 2.7
+    env: MONGODB=2.4 PYMONGO=3.5
+  - python: 2.7
+    env: MONGODB=3.0 PYMONGO=3.x
+  - python: 3.5
+    env: MONGODB=2.4 PYMONGO=3.5
+  - python: 3.5
+    env: MONGODB=3.0 PYMONGO=3.x
+  - python: 3.6
+    env: MONGODB=2.4 PYMONGO=3.5
+  - python: 3.6
+    env: MONGODB=3.0 PYMONGO=3.x
+
+before_install:
+- bash .install_mongodb_on_travis.sh
+- sleep 15  # https://docs.travis-ci.com/user/database-setup/#MongoDB-does-not-immediately-accept-connections
+- mongo --eval 'db.version();'
+
 install:
-    - if [[ $TRAVIS_PYTHON_VERSION == '2.'* ]]; then sudo apt-get install zlib1g zlib1g-dev; fi
+- sudo apt-get install python-dev python3-dev libopenjpeg-dev zlib1g-dev libjpeg-turbo8-dev
-    - if [[ $TRAVIS_PYTHON_VERSION == '2.'* ]]; then sudo ln -s /usr/lib/i386-linux-gnu/libz.so /usr/lib/; fi
+  libtiff4-dev libjpeg8-dev libfreetype6-dev liblcms2-dev libwebp-dev tcl8.5-dev tk8.5-dev
-    - if [[ $TRAVIS_PYTHON_VERSION == '2.'* ]]; then pip install PIL --use-mirrors ; true; fi
+  python-tk
-    - python setup.py install
+- travis_retry pip install --upgrade pip
+- travis_retry pip install coveralls
+- travis_retry pip install flake8 flake8-import-order
+- travis_retry pip install tox>=1.9
+- travis_retry pip install "virtualenv<14.0.0"  # virtualenv>=14.0.0 has dropped Python 3.2 support (and pypy3 is based on py32)
+- travis_retry tox -e $(echo py$TRAVIS_PYTHON_VERSION-mg$PYMONGO | tr -d . | sed -e 's/pypypy/pypy/') -- -e test
+
+# Cache dependencies installed via pip
+cache: pip
+
+# Run flake8 for py27
+before_script:
+- if [[ $TRAVIS_PYTHON_VERSION == '2.7' ]]; then flake8 .; else echo "flake8 only runs on py27"; fi
+
 script:
-    - python setup.py test
+- tox -e $(echo py$TRAVIS_PYTHON_VERSION-mg$PYMONGO | tr -d . | sed -e 's/pypypy/pypy/') -- --with-coverage
+
+# For now only submit coveralls for Python v2.7. Python v3.x currently shows
+# 0% coverage. That's caused by 'use_2to3', which builds the py3-compatible
+# code in a separate dir and runs tests on that.
+after_success:
+- if [[ $TRAVIS_PYTHON_VERSION == '2.7' ]]; then coveralls --verbose; fi
+
+notifications:
+  irc: irc.freenode.org#mongoengine
+
+# Only run builds on the master branch and GitHub releases (tagged as vX.Y.Z)
+branches:
+  only:
+  - master
+  - /^v.*$/
+
+# Whenever a new release is created via GitHub, publish it on PyPI.
+deploy:
+  provider: pypi
+  user: the_drow
+  password:
+    secure: QMyatmWBnC6ZN3XLW2+fTBDU4LQcp1m/LjR2/0uamyeUzWKdlOoh/Wx5elOgLwt/8N9ppdPeG83ose1jOz69l5G0MUMjv8n/RIcMFSpCT59tGYqn3kh55b0cIZXFT9ar+5cxlif6a5rS72IHm5li7QQyxexJIII6Uxp0kpvUmek=
+
+  # create a source distribution and a pure python wheel for faster installs
+  distributions: "sdist bdist_wheel"
+
+  # only deploy on tagged commits (aka GitHub releases) and only for the
+  # parent repo's builds running Python 2.7 along with PyMongo v3.x (we run
+  # Travis against many different Python and PyMongo versions and we don't
+  # want the deploy to occur multiple times).
+  on:
+    tags: true
+    repo: MongoEngine/mongoengine
+    condition: "$PYMONGO = 3.x"
+    python: 2.7

AUTHORS

@@ -12,12 +12,10 @@ Laine Herron https://github.com/LaineHerron
 
 CONTRIBUTORS
 
-Dervived from the git logs, inevitably incomplete but all of whom and others
+Derived from the git logs, inevitably incomplete but all of whom and others
 have submitted patches, reported bugs and generally helped make MongoEngine
 that much better:
 
- * Harry Marr
- * Ross Lawley
  * blackbrrr
  * Florian Schlachter
  * Vincent Driessen
@@ -25,7 +23,7 @@ that much better:
  * flosch
  * Deepak Thukral
  * Colin Howe
- * Wilson Júnior
+ * Wilson Júnior (https://github.com/wpjunior)
  * Alistair Roche
  * Dan Crosta
  * Viktor Kerkez
@@ -77,7 +75,7 @@ that much better:
  * Adam Parrish
  * jpfarias
  * jonrscott
- * Alice Zoë Bevan-McGregor
+ * Alice Zoë Bevan-McGregor (https://github.com/amcgregor/)
  * Stephen Young
  * tkloc
  * aid
@@ -106,7 +104,7 @@ that much better:
  * Adam Reeve
  * Anthony Nemitz
  * deignacio
- * shaunduncan
+ * Shaun Duncan
  * Meir Kriheli
  * Andrey Fedoseev
  * aparajita
@@ -121,4 +119,130 @@ that much better:
  * Anton Kolechkin
  * Sergey Nikitin
  * psychogenic
- * Stefan Wójcik
+ * Stefan Wójcik (https://github.com/wojcikstefan)
+ * dimonb
+ * Garry Polley
+ * James Slagle
+ * Adrian Scott
+ * Peter Teichman
+ * Jakub Kot
+ * Jorge Bastida
+ * Aleksandr Sorokoumov
+ * Yohan Graterol
+ * bool-dev
+ * Russ Weeks
+ * Paul Swartz
+ * Sundar Raman
+ * Benoit Louy
+ * Loic Raucy (https://github.com/lraucy)
+ * hellysmile
+ * Jaepil Jeong
+ * Daniil Sharou
+ * Pete Campton
+ * Martyn Smith
+ * Marcelo Anton
+ * Aleksey Porfirov (https://github.com/lexqt)
+ * Nicolas Trippar
+ * Manuel Hermann
+ * Gustavo Gawryszewski
+ * Max Countryman
+ * caitifbrito
+ * lcya86 刘春洋
+ * Martin Alderete (https://github.com/malderete)
+ * Nick Joyce
+ * Jared Forsyth
+ * Kenneth Falck
+ * Lukasz Balcerzak
+ * Nicolas Cortot
+ * Alex (https://github.com/kelsta)
+ * Jin Zhang
+ * Daniel Axtens
+ * Leo-Naeka
+ * Ryan Witt (https://github.com/ryanwitt)
+ * Jiequan (https://github.com/Jiequan)
+ * hensom (https://github.com/hensom)
+ * zhy0216 (https://github.com/zhy0216)
+ * istinspring (https://github.com/istinspring)
+ * Massimo Santini (https://github.com/mapio)
+ * Nigel McNie (https://github.com/nigelmcnie)
+ * ygbourhis (https://github.com/ygbourhis)
+ * Bob Dickinson (https://github.com/BobDickinson)
+ * Michael Bartnett (https://github.com/michaelbartnett)
+ * Alon Horev (https://github.com/alonho)
+ * Kelvin Hammond (https://github.com/kelvinhammond)
+ * Jatin Chopra (https://github.com/jatin)
+ * Paul Uithol (https://github.com/PaulUithol)
+ * Thom Knowles (https://github.com/fleat)
+ * Paul (https://github.com/squamous)
+ * Olivier Cortès (https://github.com/Karmak23)
+ * crazyzubr (https://github.com/crazyzubr)
+ * FrankSomething (https://github.com/FrankSomething)
+ * Alexandr Morozov (https://github.com/LK4D4)
+ * mishudark (https://github.com/mishudark)
+ * Joe Friedl (https://github.com/grampajoe)
+ * Daniel Ward (https://github.com/danielward)
+ * Aniket Deshpande (https://github.com/anicake)
+ * rfkrocktk (https://github.com/rfkrocktk)
+ * Gustavo Andrés Angulo (https://github.com/woakas)
+ * Dmytro Popovych (https://github.com/drudim)
+ * Tom (https://github.com/tomprimozic)
+ * j0hnsmith (https://github.com/j0hnsmith)
+ * Damien Churchill (https://github.com/damoxc)
+ * Jonathan Simon Prates (https://github.com/jonathansp)
+ * Thiago Papageorgiou (https://github.com/tmpapageorgiou)
+ * Omer Katz (https://github.com/thedrow)
+ * Falcon Dai (https://github.com/falcondai)
+ * Polyrabbit (https://github.com/polyrabbit)
+ * Sagiv Malihi (https://github.com/sagivmalihi)
+ * Dmitry Konishchev (https://github.com/KonishchevDmitry)
+ * Martyn Smith (https://github.com/martynsmith)
+ * Andrei Zbikowski (https://github.com/b1naryth1ef)
+ * Ronald van Rij (https://github.com/ronaldvanrij)
+ * François Schmidts (https://github.com/jaesivsm)
+ * Eric Plumb (https://github.com/professorplumb)
+ * Damien Churchill (https://github.com/damoxc)
+ * Aleksandr Sorokoumov (https://github.com/Gerrrr)
+ * Clay McClure (https://github.com/claymation)
+ * Bruno Rocha (https://github.com/rochacbruno)
+ * Norberto Leite (https://github.com/nleite)
+ * Bob Cribbs (https://github.com/bocribbz)
+ * Jay Shirley (https://github.com/jshirley)
+ * David Bordeynik (https://github.com/DavidBord)
+ * Axel Haustant (https://github.com/noirbizarre)
+ * David Czarnecki (https://github.com/czarneckid)
+ * Vyacheslav Murashkin (https://github.com/a4tunado)
+ * André Ericson https://github.com/aericson)
+ * Mikhail Moshnogorsky (https://github.com/mikhailmoshnogorsky)
+ * Diego Berrocal (https://github.com/cestdiego)
+ * Matthew Ellison (https://github.com/seglberg)
+ * Jimmy Shen (https://github.com/jimmyshen)
+ * J. Fernando Sánchez (https://github.com/balkian)
+ * Michael Chase (https://github.com/rxsegrxup)
+ * Eremeev Danil (https://github.com/elephanter)
+ * Catstyle Lee (https://github.com/Catstyle)
+ * Kiryl Yermakou (https://github.com/rma4ok)
+ * Matthieu Rigal (https://github.com/MRigal)
+ * Charanpal Dhanjal (https://github.com/charanpald)
+ * Emmanuel Leblond (https://github.com/touilleMan)
+ * Breeze.Kay (https://github.com/9nix00)
+ * Vicki Donchenko (https://github.com/kivistein)
+ * Emile Caron (https://github.com/emilecaron)
+ * Amit Lichtenberg (https://github.com/amitlicht)
+ * Gang Li (https://github.com/iici-gli)
+ * Lars Butler (https://github.com/larsbutler)
+ * George Macon (https://github.com/gmacon)
+ * Ashley Whetter (https://github.com/AWhetter)
+ * Paul-Armand Verhaegen (https://github.com/paularmand)
+ * Steven Rossiter (https://github.com/BeardedSteve)
+ * Luo Peng (https://github.com/RussellLuo)
+ * Bryan Bennett (https://github.com/bbenne10)
+ * Gilb's Gilb's (https://github.com/gilbsgilbs)
+ * Joshua Nedrud (https://github.com/Neurostack)
+ * Shu Shen (https://github.com/shushen)
+ * xiaost7 (https://github.com/xiaost7)
+ * Victor Varvaryuk
+ * Stanislav Kaledin (https://github.com/sallyruthstruik)
+ * Dmitry Yantsen (https://github.com/mrTable)
+ * Renjianxin (https://github.com/Davidrjx)
+ * Erdenezul Batmunkh (https://github.com/erdenezul)
+ * Andy Yankovsky (https://github.com/werat)

CONTRIBUTING.rst

@@ -0,0 +1,82 @@
+Contributing to MongoEngine
+===========================
+
+MongoEngine has a large `community
+<https://raw.github.com/MongoEngine/mongoengine/master/AUTHORS>`_ and
+contributions are always encouraged. Contributions can be as simple as
+minor tweaks to the documentation. Please read these guidelines before
+sending a pull request.
+
+Bugfixes and New Features
+-------------------------
+
+Before starting to write code, look for existing `tickets
+<https://github.com/MongoEngine/mongoengine/issues?state=open>`_ or `create one
+<https://github.com/MongoEngine/mongoengine/issues>`_ for your specific
+issue or feature request. That way you avoid working on something
+that might not be of interest or that has already been addressed. If in doubt
+post to the `user group <http://groups.google.com/group/mongoengine-users>`
+
+Supported Interpreters
+----------------------
+
+MongoEngine supports CPython 2.7 and newer. Language
+features not supported by all interpreters can not be used.
+Please also ensure that your code is properly converted by
+`2to3 <http://docs.python.org/library/2to3.html>`_ for Python 3 support.
+
+Style Guide
+-----------
+
+MongoEngine aims to follow `PEP8 <http://www.python.org/dev/peps/pep-0008/>`_
+including 4 space indents. When possible we try to stick to 79 character line
+limits. However, screens got bigger and an ORM has a strong focus on
+readability and if it can help, we accept 119 as maximum line length, in a
+similar way as `django does
+<https://docs.djangoproject.com/en/dev/internals/contributing/writing-code/coding-style/#python-style>`_
+
+Testing
+-------
+
+All tests are run on `Travis <http://travis-ci.org/MongoEngine/mongoengine>`_
+and any pull requests are automatically tested. Any pull requests without
+tests will take longer to be integrated and might be refused.
+
+You may also submit a simple failing test as a pull request if you don't know
+how to fix it, it will be easier for other people to work on it and it may get
+fixed faster.
+
+General Guidelines
+------------------
+
+- Avoid backward breaking changes if at all possible.
+- If you *have* to introduce a breaking change, make it very clear in your
+  pull request's description. Also, describe how users of this package
+  should adapt to the breaking change in docs/upgrade.rst.
+- Write inline documentation for new classes and methods.
+- Write tests and make sure they pass (make sure you have a mongod
+  running on the default port, then execute ``python setup.py nosetests``
+  from the cmd line to run the test suite).
+- Ensure tests pass on all supported Python, PyMongo, and MongoDB versions.
+  You can test various Python and PyMongo versions locally by executing
+  ``tox``. For different MongoDB versions, you can rely on our automated
+  Travis tests.
+- Add enhancements or problematic bug fixes to docs/changelog.rst.
+- Add yourself to AUTHORS :)
+
+Documentation
+-------------
+
+To contribute to the `API documentation
+<http://docs.mongoengine.org/en/latest/apireference.html>`_
+just make your changes to the inline documentation of the appropriate
+`source code <https://github.com/MongoEngine/mongoengine>`_ or `rst file
+<https://github.com/MongoEngine/mongoengine/tree/master/docs>`_ in a
+branch and submit a `pull request <https://help.github.com/articles/using-pull-requests>`_.
+You might also use the github `Edit <https://github.com/blog/844-forking-with-the-edit-button>`_
+button.
+
+If you want to test your documentation changes locally, you need to install
+the ``sphinx`` and ``sphinx_rtd_theme`` packages. Once these are installed,
+go to the ``docs`` directory, run ``make html`` and inspect the updated docs
+by running ``open _build/html/index.html``.

LICENSE

@@ -1,4 +1,4 @@
-Copyright (c) 2009-2012 See AUTHORS
+Copyright (c) 2009 See AUTHORS
 
 Permission is hereby granted, free of charge, to any person
 obtaining a copy of this software and associated documentation

README.rst

@@ -4,39 +4,72 @@ MongoEngine
 :Info: MongoEngine is an ORM-like layer on top of PyMongo.
 :Repository: https://github.com/MongoEngine/mongoengine
 :Author: Harry Marr (http://github.com/hmarr)
-:Maintainer: Ross Lawley (http://github.com/rozza)
+:Maintainer: Stefan Wójcik (http://github.com/wojcikstefan)
 
-.. image:: https://secure.travis-ci.org/MongoEngine/mongoengine.png?branch=master
+.. image:: https://travis-ci.org/MongoEngine/mongoengine.svg?branch=master
-  :target: http://travis-ci.org/MongoEngine/mongoengine
+  :target: https://travis-ci.org/MongoEngine/mongoengine
+
+.. image:: https://coveralls.io/repos/github/MongoEngine/mongoengine/badge.svg?branch=master
+  :target: https://coveralls.io/github/MongoEngine/mongoengine?branch=master
+
+.. image:: https://landscape.io/github/MongoEngine/mongoengine/master/landscape.svg?style=flat
+  :target: https://landscape.io/github/MongoEngine/mongoengine/master
+  :alt: Code Health
 
 About
 =====
 MongoEngine is a Python Object-Document Mapper for working with MongoDB.
-Documentation available at http://mongoengine-odm.rtfd.org - there is currently
+Documentation is available at https://mongoengine-odm.readthedocs.io - there
-a `tutorial <http://readthedocs.org/docs/mongoengine-odm/en/latest/tutorial.html>`_, a `user guide
+is currently a `tutorial <https://mongoengine-odm.readthedocs.io/tutorial.html>`_,
-<http://readthedocs.org/docs/mongoengine-odm/en/latest/userguide.html>`_ and an `API reference
+a `user guide <https://mongoengine-odm.readthedocs.io/guide/index.html>`_, and
-<http://readthedocs.org/docs/mongoengine-odm/en/latest/apireference.html>`_.
+an `API reference <https://mongoengine-odm.readthedocs.io/apireference.html>`_.
+
+Supported MongoDB Versions
+==========================
+MongoEngine is currently tested against MongoDB v2.4, v2.6, and v3.0. Future
+versions should be supported as well, but aren't actively tested at the moment.
+Make sure to open an issue or submit a pull request if you experience any
+problems with MongoDB v3.2+.
 
 Installation
 ============
-If you have `setuptools <http://peak.telecommunity.com/DevCenter/setuptools>`_
+We recommend the use of `virtualenv <https://virtualenv.pypa.io/>`_ and of
-you can use ``easy_install -U mongoengine``. Otherwise, you can download the
+`pip <https://pip.pypa.io/>`_. You can then use ``pip install -U mongoengine``.
+You may also have `setuptools <http://peak.telecommunity.com/DevCenter/setuptools>`_
+and thus you can use ``easy_install -U mongoengine``. Otherwise, you can download the
 source from `GitHub <http://github.com/MongoEngine/mongoengine>`_ and run ``python
 setup.py install``.
 
 Dependencies
 ============
-- pymongo 2.1.1+
+All of the dependencies can easily be installed via `pip <https://pip.pypa.io/>`_.
-- sphinx (optional - for documentation generation)
+At the very least, you'll need these two packages to use MongoEngine:
+
+- pymongo>=2.7.1
+- six>=1.10.0
+
+If you utilize a ``DateTimeField``, you might also use a more flexible date parser:
+
+- dateutil>=2.1.0
+
+If you need to use an ``ImageField`` or ``ImageGridFsProxy``:
+
+- Pillow>=2.0.0
 
 Examples
 ========
-Some simple examples of what MongoEngine code looks like::
+Some simple examples of what MongoEngine code looks like:
+
+.. code :: python
+
+    from mongoengine import *
+    connect('mydb')
 
     class BlogPost(Document):
         title = StringField(required=True, max_length=200)
-        posted = DateTimeField(default=datetime.datetime.now)
+        posted = DateTimeField(default=datetime.datetime.utcnow)
         tags = ListField(StringField(max_length=50))
+        meta = {'allow_inheritance': True}
 
     class TextPost(BlogPost):
         content = StringField(required=True)
@@ -63,29 +96,47 @@ Some simple examples of what MongoEngine code looks like::
     ...         print 'Link:', post.url
     ...     print
     ...
-    === Using MongoEngine ===
-    See the tutorial
 
-    === MongoEngine Docs ===
+    # Count all blog posts and its subtypes
-    Link: hmarr.com/mongoengine
+    >>> BlogPost.objects.count()
-
-    >>> len(BlogPost.objects)
     2
-    >>> len(HtmlPost.objects)
+    >>> TextPost.objects.count()
     1
-    >>> len(LinkPost.objects)
+    >>> LinkPost.objects.count()
     1
 
-    # Find tagged posts
+    # Count tagged posts
-    >>> len(BlogPost.objects(tags='mongoengine'))
+    >>> BlogPost.objects(tags='mongoengine').count()
     2
-    >>> len(BlogPost.objects(tags='mongodb'))
+    >>> BlogPost.objects(tags='mongodb').count()
     1
 
 Tests
 =====
 To run the test suite, ensure you are running a local instance of MongoDB on
-the standard port, and run ``python setup.py test``.
+the standard port and have ``nose`` installed. Then, run ``python setup.py nosetests``.
+
+To run the test suite on every supported Python and PyMongo version, you can
+use ``tox``. You'll need to make sure you have each supported Python version
+installed in your environment and then:
+
+.. code-block:: shell
+
+    # Install tox
+    $ pip install tox
+    # Run the test suites
+    $ tox
+
+If you wish to run a subset of tests, use the nosetests convention:
+
+.. code-block:: shell
+
+    # Run all the tests in a particular test file
+    $ python setup.py nosetests --tests tests/fields/fields.py
+    # Run only particular test class in that file
+    $ python setup.py nosetests --tests tests/fields/fields.py:FieldTest
+    # Use the -s option if you want to print some debug statements or use pdb
+    $ python setup.py nosetests --tests tests/fields/fields.py:FieldTest -s
 
 Community
 =========
@@ -93,11 +144,7 @@ Community
   <http://groups.google.com/group/mongoengine-users>`_
 - `MongoEngine Developers mailing list
   <http://groups.google.com/group/mongoengine-dev>`_
-- `#mongoengine IRC channel <irc://irc.freenode.net/mongoengine>`_
 
 Contributing
 ============
-The source is available on `GitHub <http://github.com/MongoEngine/mongoengine>`_ - to
+We welcome contributions! See the `Contribution guidelines <https://github.com/MongoEngine/mongoengine/blob/master/CONTRIBUTING.rst>`_
-contribute to the project, fork it on GitHub and send a pull request, all
-contributions and suggestions are welcome!
-

benchmark.py

@@ -1,137 +1,111 @@
 #!/usr/bin/env python
 
+"""
+Simple benchmark comparing PyMongo and MongoEngine.
+
+Sample run on a mid 2015 MacBook Pro (commit b282511):
+
+Benchmarking...
+----------------------------------------------------------------------------------------------------
+Creating 10000 dictionaries - Pymongo
+2.58979988098
+----------------------------------------------------------------------------------------------------
+Creating 10000 dictionaries - Pymongo write_concern={"w": 0}
+1.26657605171
+----------------------------------------------------------------------------------------------------
+Creating 10000 dictionaries - MongoEngine
+8.4351580143
+----------------------------------------------------------------------------------------------------
+Creating 10000 dictionaries without continual assign - MongoEngine
+7.20191693306
+----------------------------------------------------------------------------------------------------
+Creating 10000 dictionaries - MongoEngine - write_concern={"w": 0}, cascade = True
+6.31104588509
+----------------------------------------------------------------------------------------------------
+Creating 10000 dictionaries - MongoEngine, write_concern={"w": 0}, validate=False, cascade=True
+6.07083487511
+----------------------------------------------------------------------------------------------------
+Creating 10000 dictionaries - MongoEngine, write_concern={"w": 0}, validate=False
+5.97704291344
+----------------------------------------------------------------------------------------------------
+Creating 10000 dictionaries - MongoEngine, force_insert=True, write_concern={"w": 0}, validate=False
+5.9111430645
+"""
+
 import timeit
 
 
-def cprofile_main():
-    from pymongo import Connection
-    connection = Connection()
-    connection.drop_database('timeit_test')
-    connection.disconnect()
-
-    from mongoengine import Document, DictField, connect
-    connect("timeit_test")
-
-    class Noddy(Document):
-        fields = DictField()
-
-    for i in xrange(1):
-        noddy = Noddy()
-        for j in range(20):
-            noddy.fields["key" + str(j)] = "value " + str(j)
-        noddy.save()
-
-
 def main():
-    """
+    print("Benchmarking...")
-    0.4 Performance Figures ...
-
-    ----------------------------------------------------------------------------------------------------
-    Creating 10000 dictionaries - Pymongo
-    3.86744189262
-    ----------------------------------------------------------------------------------------------------
-    Creating 10000 dictionaries - MongoEngine
-    6.23374891281
-    ----------------------------------------------------------------------------------------------------
-    Creating 10000 dictionaries - MongoEngine, safe=False, validate=False
-    5.33027005196
-    ----------------------------------------------------------------------------------------------------
-    Creating 10000 dictionaries - MongoEngine, safe=False, validate=False, cascade=False
-    pass - No Cascade
-
-    0.5.X
-    ----------------------------------------------------------------------------------------------------
-    Creating 10000 dictionaries - Pymongo
-    3.89597702026
-    ----------------------------------------------------------------------------------------------------
-    Creating 10000 dictionaries - MongoEngine
-    21.7735359669
-    ----------------------------------------------------------------------------------------------------
-    Creating 10000 dictionaries - MongoEngine, safe=False, validate=False
-    19.8670389652
-    ----------------------------------------------------------------------------------------------------
-    Creating 10000 dictionaries - MongoEngine, safe=False, validate=False, cascade=False
-    pass - No Cascade
-
-    0.6.X
-    ----------------------------------------------------------------------------------------------------
-    Creating 10000 dictionaries - Pymongo
-    3.81559205055
-    ----------------------------------------------------------------------------------------------------
-    Creating 10000 dictionaries - MongoEngine
-    10.0446798801
-    ----------------------------------------------------------------------------------------------------
-    Creating 10000 dictionaries - MongoEngine, safe=False, validate=False
-    9.51354718208
-    ----------------------------------------------------------------------------------------------------
-    Creating 10000 dictionaries - MongoEngine, safe=False, validate=False, cascade=False
-    9.02567505836
-    ----------------------------------------------------------------------------------------------------
-    Creating 10000 dictionaries - MongoEngine, force=True
-    8.44933390617
-
-    0.7.X
-    ----------------------------------------------------------------------------------------------------
-    Creating 10000 dictionaries - Pymongo
-    3.78801012039
-    ----------------------------------------------------------------------------------------------------
-    Creating 10000 dictionaries - MongoEngine
-    9.73050498962
-    ----------------------------------------------------------------------------------------------------
-    Creating 10000 dictionaries - MongoEngine, safe=False, validate=False
-    8.33456707001
-    ----------------------------------------------------------------------------------------------------
-    Creating 10000 dictionaries - MongoEngine, safe=False, validate=False, cascade=False
-    8.37778115273
-    ----------------------------------------------------------------------------------------------------
-    Creating 10000 dictionaries - MongoEngine, force=True
-    8.36906409264
-    """
 
     setup = """
-from pymongo import Connection
+from pymongo import MongoClient
-connection = Connection()
+connection = MongoClient()
 connection.drop_database('timeit_test')
 """
 
     stmt = """
-from pymongo import Connection
+from pymongo import MongoClient
-connection = Connection()
+connection = MongoClient()
 
 db = connection.timeit_test
 noddy = db.noddy
 
-for i in xrange(10000):
+for i in range(10000):
     example = {'fields': {}}
     for j in range(20):
-        example['fields']["key"+str(j)] = "value "+str(j)
+        example['fields']['key' + str(j)] = 'value ' + str(j)
 
-    noddy.insert(example)
+    noddy.save(example)
 
 myNoddys = noddy.find()
 [n for n in myNoddys] # iterate
 """
 
-    print "-" * 100
+    print("-" * 100)
-    print """Creating 10000 dictionaries - Pymongo"""
+    print("""Creating 10000 dictionaries - Pymongo""")
     t = timeit.Timer(stmt=stmt, setup=setup)
-    print t.timeit(1)
+    print(t.timeit(1))
+
+    stmt = """
+from pymongo import MongoClient
+from pymongo.write_concern import WriteConcern
+connection = MongoClient()
+
+db = connection.get_database('timeit_test', write_concern=WriteConcern(w=0))
+noddy = db.noddy
+
+for i in range(10000):
+    example = {'fields': {}}
+    for j in range(20):
+        example['fields']["key"+str(j)] = "value "+str(j)
+
+    noddy.save(example)
+
+myNoddys = noddy.find()
+[n for n in myNoddys] # iterate
+"""
+
+    print("-" * 100)
+    print("""Creating 10000 dictionaries - Pymongo write_concern={"w": 0}""")
+    t = timeit.Timer(stmt=stmt, setup=setup)
+    print(t.timeit(1))
 
     setup = """
-from pymongo import Connection
+from pymongo import MongoClient
-connection = Connection()
+connection = MongoClient()
 connection.drop_database('timeit_test')
-connection.disconnect()
+connection.close()
 
 from mongoengine import Document, DictField, connect
-connect("timeit_test")
+connect('timeit_test')
 
 class Noddy(Document):
     fields = DictField()
 """
 
     stmt = """
-for i in xrange(10000):
+for i in range(10000):
     noddy = Noddy()
     for j in range(20):
         noddy.fields["key"+str(j)] = "value "+str(j)
@@ -141,59 +115,93 @@ myNoddys = Noddy.objects()
 [n for n in myNoddys] # iterate
 """
 
-    print "-" * 100
+    print("-" * 100)
-    print """Creating 10000 dictionaries - MongoEngine"""
+    print("""Creating 10000 dictionaries - MongoEngine""")
     t = timeit.Timer(stmt=stmt, setup=setup)
-    print t.timeit(1)
+    print(t.timeit(1))
 
     stmt = """
-for i in xrange(10000):
+for i in range(10000):
     noddy = Noddy()
+    fields = {}
     for j in range(20):
-        noddy.fields["key"+str(j)] = "value "+str(j)
+        fields["key"+str(j)] = "value "+str(j)
-    noddy.save(safe=False, validate=False)
+    noddy.fields = fields
+    noddy.save()
 
 myNoddys = Noddy.objects()
 [n for n in myNoddys] # iterate
 """
 
-    print "-" * 100
+    print("-" * 100)
-    print """Creating 10000 dictionaries - MongoEngine, safe=False, validate=False"""
+    print("""Creating 10000 dictionaries without continual assign - MongoEngine""")
     t = timeit.Timer(stmt=stmt, setup=setup)
-    print t.timeit(1)
+    print(t.timeit(1))
-
 
     stmt = """
-for i in xrange(10000):
+for i in range(10000):
     noddy = Noddy()
     for j in range(20):
         noddy.fields["key"+str(j)] = "value "+str(j)
-    noddy.save(safe=False, validate=False, cascade=False)
+    noddy.save(write_concern={"w": 0}, cascade=True)
 
 myNoddys = Noddy.objects()
 [n for n in myNoddys] # iterate
 """
 
-    print "-" * 100
+    print("-" * 100)
-    print """Creating 10000 dictionaries - MongoEngine, safe=False, validate=False, cascade=False"""
+    print("""Creating 10000 dictionaries - MongoEngine - write_concern={"w": 0}, cascade = True""")
     t = timeit.Timer(stmt=stmt, setup=setup)
-    print t.timeit(1)
+    print(t.timeit(1))
 
     stmt = """
-for i in xrange(10000):
+for i in range(10000):
     noddy = Noddy()
     for j in range(20):
         noddy.fields["key"+str(j)] = "value "+str(j)
-    noddy.save(force_insert=True, safe=False, validate=False, cascade=False)
+    noddy.save(write_concern={"w": 0}, validate=False, cascade=True)
 
 myNoddys = Noddy.objects()
 [n for n in myNoddys] # iterate
 """
 
-    print "-" * 100
+    print("-" * 100)
-    print """Creating 10000 dictionaries - MongoEngine, force=True"""
+    print("""Creating 10000 dictionaries - MongoEngine, write_concern={"w": 0}, validate=False, cascade=True""")
     t = timeit.Timer(stmt=stmt, setup=setup)
-    print t.timeit(1)
+    print(t.timeit(1))
+
+    stmt = """
+for i in range(10000):
+    noddy = Noddy()
+    for j in range(20):
+        noddy.fields["key"+str(j)] = "value "+str(j)
+    noddy.save(validate=False, write_concern={"w": 0})
+
+myNoddys = Noddy.objects()
+[n for n in myNoddys] # iterate
+"""
+
+    print("-" * 100)
+    print("""Creating 10000 dictionaries - MongoEngine, write_concern={"w": 0}, validate=False""")
+    t = timeit.Timer(stmt=stmt, setup=setup)
+    print(t.timeit(1))
+
+    stmt = """
+for i in range(10000):
+    noddy = Noddy()
+    for j in range(20):
+        noddy.fields["key"+str(j)] = "value "+str(j)
+    noddy.save(force_insert=True, write_concern={"w": 0}, validate=False)
+
+myNoddys = Noddy.objects()
+[n for n in myNoddys] # iterate
+"""
+
+    print("-" * 100)
+    print("""Creating 10000 dictionaries - MongoEngine, force_insert=True, write_concern={"w": 0}, validate=False""")
+    t = timeit.Timer(stmt=stmt, setup=setup)
+    print(t.timeit(1))
+
 
 if __name__ == "__main__":
     main()

docs/_themes/nature/static/nature.css_t

@@ -1,229 +0,0 @@
-/**
- * Sphinx stylesheet -- default theme
- * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- */
- 
-@import url("basic.css");
- 
-/* -- page layout ----------------------------------------------------------- */
- 
-body {
-    font-family: Arial, sans-serif;
-    font-size: 100%;
-    background-color: #111;
-    color: #555;
-    margin: 0;
-    padding: 0;
-}
-
-div.documentwrapper {
-    float: left;
-    width: 100%;
-}
-
-div.bodywrapper {
-    margin: 0 0 0 230px;
-}
-
-hr{
-    border: 1px solid #B1B4B6;
-}
- 
-div.document {
-    background-color: #eee;
-}
- 
-div.body {
-    background-color: #ffffff;
-    color: #3E4349;
-    padding: 0 30px 30px 30px;
-    font-size: 0.8em;
-}
- 
-div.footer {
-    color: #555;
-    width: 100%;
-    padding: 13px 0;
-    text-align: center;
-    font-size: 75%;
-}
- 
-div.footer a {
-    color: #444;
-    text-decoration: underline;
-}
- 
-div.related {
-    background-color: #6BA81E;
-    line-height: 32px;
-    color: #fff;
-    text-shadow: 0px 1px 0 #444;
-    font-size: 0.80em;
-}
- 
-div.related a {
-    color: #E2F3CC;
-}
- 
-div.sphinxsidebar {
-    font-size: 0.75em;
-    line-height: 1.5em;
-}
-
-div.sphinxsidebarwrapper{
-    padding: 20px 0;
-}
- 
-div.sphinxsidebar h3,
-div.sphinxsidebar h4 {
-    font-family: Arial, sans-serif;
-    color: #222;
-    font-size: 1.2em;
-    font-weight: normal;
-    margin: 0;
-    padding: 5px 10px;
-    background-color: #ddd;
-    text-shadow: 1px 1px 0 white
-}
-
-div.sphinxsidebar h4{
-    font-size: 1.1em;
-}
- 
-div.sphinxsidebar h3 a {
-    color: #444;
-}
- 
- 
-div.sphinxsidebar p {
-    color: #888;
-    padding: 5px 20px;
-}
- 
-div.sphinxsidebar p.topless {
-}
- 
-div.sphinxsidebar ul {
-    margin: 10px 20px;
-    padding: 0;
-    color: #000;
-}
- 
-div.sphinxsidebar a {
-    color: #444;
-}
- 
-div.sphinxsidebar input {
-    border: 1px solid #ccc;
-    font-family: sans-serif;
-    font-size: 1em;
-}
-
-div.sphinxsidebar input[type=text]{
-    margin-left: 20px;
-}
- 
-/* -- body styles ----------------------------------------------------------- */
- 
-a {
-    color: #005B81;
-    text-decoration: none;
-}
- 
-a:hover {
-    color: #E32E00;
-    text-decoration: underline;
-}
- 
-div.body h1,
-div.body h2,
-div.body h3,
-div.body h4,
-div.body h5,
-div.body h6 {
-    font-family: Arial, sans-serif;
-    background-color: #BED4EB;
-    font-weight: normal;
-    color: #212224;
-    margin: 30px 0px 10px 0px;
-    padding: 5px 0 5px 10px;
-    text-shadow: 0px 1px 0 white
-}
- 
-div.body h1 { border-top: 20px solid white; margin-top: 0; font-size: 200%; }
-div.body h2 { font-size: 150%; background-color: #C8D5E3; }
-div.body h3 { font-size: 120%; background-color: #D8DEE3; }
-div.body h4 { font-size: 110%; background-color: #D8DEE3; }
-div.body h5 { font-size: 100%; background-color: #D8DEE3; }
-div.body h6 { font-size: 100%; background-color: #D8DEE3; }
- 
-a.headerlink {
-    color: #c60f0f;
-    font-size: 0.8em;
-    padding: 0 4px 0 4px;
-    text-decoration: none;
-}
- 
-a.headerlink:hover {
-    background-color: #c60f0f;
-    color: white;
-}
- 
-div.body p, div.body dd, div.body li {
-    line-height: 1.5em;
-}
- 
-div.admonition p.admonition-title + p {
-    display: inline;
-}
-
-div.highlight{
-    background-color: white;
-}
-
-div.note {
-    background-color: #eee;
-    border: 1px solid #ccc;
-}
- 
-div.seealso {
-    background-color: #ffc;
-    border: 1px solid #ff6;
-}
- 
-div.topic {
-    background-color: #eee;
-}
- 
-div.warning {
-    background-color: #ffe4e4;
-    border: 1px solid #f66;
-}
- 
-p.admonition-title {
-    display: inline;
-}
- 
-p.admonition-title:after {
-    content: ":";
-}
- 
-pre {
-    padding: 10px;
-    background-color: White;
-    color: #222;
-    line-height: 1.2em;
-    border: 1px solid #C6C9CB;
-    font-size: 1.2em;
-    margin: 1.5em 0 1.5em 0;
-    -webkit-box-shadow: 1px 1px 1px #d8d8d8;
-    -moz-box-shadow: 1px 1px 1px #d8d8d8;
-}
- 
-tt {
-    background-color: #ecf0f3;
-    color: #222;
-    padding: 1px 2px;
-    font-size: 1.2em;
-    font-family: monospace;
-}

docs/_themes/nature/static/pygments.css

@@ -1,54 +0,0 @@
-.c { color: #999988; font-style: italic } /* Comment */
-.k { font-weight: bold } /* Keyword */
-.o { font-weight: bold } /* Operator */
-.cm { color: #999988; font-style: italic } /* Comment.Multiline */
-.cp { color: #999999; font-weight: bold } /* Comment.preproc */
-.c1 { color: #999988; font-style: italic } /* Comment.Single */
-.gd { color: #000000; background-color: #ffdddd } /* Generic.Deleted */
-.ge { font-style: italic } /* Generic.Emph */
-.gr { color: #aa0000 } /* Generic.Error */
-.gh { color: #999999 } /* Generic.Heading */
-.gi { color: #000000; background-color: #ddffdd } /* Generic.Inserted */
-.go { color: #111 } /* Generic.Output */
-.gp { color: #555555 } /* Generic.Prompt */
-.gs { font-weight: bold } /* Generic.Strong */
-.gu { color: #aaaaaa } /* Generic.Subheading */
-.gt { color: #aa0000 } /* Generic.Traceback */
-.kc { font-weight: bold } /* Keyword.Constant */
-.kd { font-weight: bold } /* Keyword.Declaration */
-.kp { font-weight: bold } /* Keyword.Pseudo */
-.kr { font-weight: bold } /* Keyword.Reserved */
-.kt { color: #445588; font-weight: bold } /* Keyword.Type */
-.m { color: #009999 } /* Literal.Number */
-.s { color: #bb8844 } /* Literal.String */
-.na { color: #008080 } /* Name.Attribute */
-.nb { color: #999999 } /* Name.Builtin */
-.nc { color: #445588; font-weight: bold } /* Name.Class */
-.no { color: #ff99ff } /* Name.Constant */
-.ni { color: #800080 } /* Name.Entity */
-.ne { color: #990000; font-weight: bold } /* Name.Exception */
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-.nn { color: #555555 } /* Name.Namespace */
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docs/_themes/nature/theme.conf

@@ -1,4 +0,0 @@
-[theme]
-inherit = basic
-stylesheet = nature.css
-pygments_style = tango

docs/apireference.rst

@@ -34,41 +34,97 @@ Documents
 .. autoclass:: mongoengine.ValidationError
   :members:
 
+.. autoclass:: mongoengine.FieldDoesNotExist
+
+
+Context Managers
+================
+
+.. autoclass:: mongoengine.context_managers.switch_db
+.. autoclass:: mongoengine.context_managers.switch_collection
+.. autoclass:: mongoengine.context_managers.no_dereference
+.. autoclass:: mongoengine.context_managers.query_counter
+
 Querying
 ========
 
+.. automodule:: mongoengine.queryset
+    :synopsis: Queryset level operations
+
     .. autoclass:: mongoengine.queryset.QuerySet
       :members:
+      :inherited-members:
 
-   .. automethod:: mongoengine.queryset.QuerySet.__call__
+      .. automethod:: QuerySet.__call__
+
+    .. autoclass:: mongoengine.queryset.QuerySetNoCache
+      :members:
+
+       .. automethod:: mongoengine.queryset.QuerySetNoCache.__call__
 
     .. autofunction:: mongoengine.queryset.queryset_manager
 
 Fields
 ======
 
-.. autoclass:: mongoengine.BinaryField
+.. autoclass:: mongoengine.base.fields.BaseField
-.. autoclass:: mongoengine.BooleanField
+.. autoclass:: mongoengine.fields.StringField
-.. autoclass:: mongoengine.ComplexDateTimeField
+.. autoclass:: mongoengine.fields.URLField
-.. autoclass:: mongoengine.DateTimeField
+.. autoclass:: mongoengine.fields.EmailField
-.. autoclass:: mongoengine.DecimalField
+.. autoclass:: mongoengine.fields.IntField
-.. autoclass:: mongoengine.DictField
+.. autoclass:: mongoengine.fields.LongField
-.. autoclass:: mongoengine.DynamicField
+.. autoclass:: mongoengine.fields.FloatField
-.. autoclass:: mongoengine.EmailField
+.. autoclass:: mongoengine.fields.DecimalField
-.. autoclass:: mongoengine.EmbeddedDocumentField
+.. autoclass:: mongoengine.fields.BooleanField
-.. autoclass:: mongoengine.FileField
+.. autoclass:: mongoengine.fields.DateTimeField
-.. autoclass:: mongoengine.FloatField
+.. autoclass:: mongoengine.fields.ComplexDateTimeField
-.. autoclass:: mongoengine.GenericEmbeddedDocumentField
+.. autoclass:: mongoengine.fields.EmbeddedDocumentField
-.. autoclass:: mongoengine.GenericReferenceField
+.. autoclass:: mongoengine.fields.GenericEmbeddedDocumentField
-.. autoclass:: mongoengine.GeoPointField
+.. autoclass:: mongoengine.fields.DynamicField
-.. autoclass:: mongoengine.ImageField
+.. autoclass:: mongoengine.fields.ListField
-.. autoclass:: mongoengine.IntField
+.. autoclass:: mongoengine.fields.EmbeddedDocumentListField
-.. autoclass:: mongoengine.ListField
+.. autoclass:: mongoengine.fields.SortedListField
-.. autoclass:: mongoengine.MapField
+.. autoclass:: mongoengine.fields.DictField
-.. autoclass:: mongoengine.ObjectIdField
+.. autoclass:: mongoengine.fields.MapField
-.. autoclass:: mongoengine.ReferenceField
+.. autoclass:: mongoengine.fields.ReferenceField
-.. autoclass:: mongoengine.SequenceField
+.. autoclass:: mongoengine.fields.LazyReferenceField
-.. autoclass:: mongoengine.SortedListField
+.. autoclass:: mongoengine.fields.GenericReferenceField
-.. autoclass:: mongoengine.StringField
+.. autoclass:: mongoengine.fields.GenericLazyReferenceField
-.. autoclass:: mongoengine.URLField
+.. autoclass:: mongoengine.fields.CachedReferenceField
-.. autoclass:: mongoengine.UUIDField
+.. autoclass:: mongoengine.fields.BinaryField
+.. autoclass:: mongoengine.fields.FileField
+.. autoclass:: mongoengine.fields.ImageField
+.. autoclass:: mongoengine.fields.SequenceField
+.. autoclass:: mongoengine.fields.ObjectIdField
+.. autoclass:: mongoengine.fields.UUIDField
+.. autoclass:: mongoengine.fields.GeoPointField
+.. autoclass:: mongoengine.fields.PointField
+.. autoclass:: mongoengine.fields.LineStringField
+.. autoclass:: mongoengine.fields.PolygonField
+.. autoclass:: mongoengine.fields.MultiPointField
+.. autoclass:: mongoengine.fields.MultiLineStringField
+.. autoclass:: mongoengine.fields.MultiPolygonField
+.. autoclass:: mongoengine.fields.GridFSError
+.. autoclass:: mongoengine.fields.GridFSProxy
+.. autoclass:: mongoengine.fields.ImageGridFsProxy
+.. autoclass:: mongoengine.fields.ImproperlyConfigured
+
+Embedded Document Querying
+==========================
+
+.. versionadded:: 0.9
+
+Additional queries for Embedded Documents are available when using the
+:class:`~mongoengine.EmbeddedDocumentListField` to store a list of embedded
+documents.
+
+A list of embedded documents is returned as a special list with the
+following methods:
+
+.. autoclass:: mongoengine.base.datastructures.EmbeddedDocumentList
+    :members:
+
+Misc
+====
+
+.. autofunction:: mongoengine.common._import_class

docs/changelog.rst

@@ -2,39 +2,531 @@
 Changelog
 =========
 
-Changes in 0.7.X
+Changes in 0.15.3
 =================
-- Added NotUniqueError for duplicate keys (MongoEngine/mongoengine#62)
+-  Subfield resolve error in generic_emdedded_document query #1651 #1652
-- Added custom collection / sequence naming for SequenceFields (MongoEngine/mongoengine#92)
+-  use each modifier only with $position #1673 #1675
-- Fixed UnboundLocalError in composite index with pk field (MongoEngine/mongoengine#88)
+-  Improve LazyReferenceField and GenericLazyReferenceField with nested fields #1704
+-  Fix validation error instance in GenericEmbeddedDocumentField #1067
+-  Update cached fields when fields argument is given #1712
+-  Add a db parameter to register_connection for compatibility with connect
+-  Use insert_one, insert_many in Document.insert #1491
+-  Use new update_one, update_many on document/queryset update #1491
+-  Use insert_one, insert_many in Document.insert #1491
+-  Fix reload(fields) affect changed fields #1371
+-  Fix Read-only access to database fails when trying to create indexes #1338
+
+Changes in 0.15.0
+=================
+- Add LazyReferenceField and GenericLazyReferenceField to address #1230
+
+Changes in 0.14.1
+=================
+- Removed SemiStrictDict and started using a regular dict for `BaseDocument._data` #1630
+- Added support for the `$position` param in the `$push` operator #1566
+- Fixed `DateTimeField` interpreting an empty string as today #1533
+- Added a missing `__ne__` method to the `GridFSProxy` class #1632
+- Fixed `BaseQuerySet._fields_to_db_fields` #1553
+
+Changes in 0.14.0
+=================
+- BREAKING CHANGE: Removed the `coerce_types` param from `QuerySet.as_pymongo` #1549
+- POTENTIAL BREAKING CHANGE: Made EmbeddedDocument not hashable by default #1528
+- Improved code quality #1531, #1540, #1541, #1547
+
+Changes in 0.13.0
+=================
+- POTENTIAL BREAKING CHANGE: Added Unicode support to the `EmailField`, see
+  docs/upgrade.rst for details.
+
+Changes in 0.12.0
+=================
+- POTENTIAL BREAKING CHANGE: Fixed limit/skip/hint/batch_size chaining #1476
+- POTENTIAL BREAKING CHANGE: Changed a public `QuerySet.clone_into` method to a private `QuerySet._clone_into` #1476
+- Fixed the way `Document.objects.create` works with duplicate IDs #1485
+- Fixed connecting to a replica set with PyMongo 2.x #1436
+- Fixed using sets in field choices #1481
+- Fixed deleting items from a `ListField` #1318
+- Fixed an obscure error message when filtering by `field__in=non_iterable`. #1237
+- Fixed behavior of a `dec` update operator #1450
+- Added a `rename` update operator #1454
+- Added validation for the `db_field` parameter #1448
+- Fixed the error message displayed when querying an `EmbeddedDocumentField` by an invalid value #1440
+- Fixed the error message displayed when validating unicode URLs #1486
+- Raise an error when trying to save an abstract document #1449
+
+Changes in 0.11.0
+=================
+- BREAKING CHANGE: Renamed `ConnectionError` to `MongoEngineConnectionError` since the former is a built-in exception name in Python v3.x. #1428
+- BREAKING CHANGE: Dropped Python 2.6 support. #1428
+- BREAKING CHANGE: `from mongoengine.base import ErrorClass` won't work anymore for any error from `mongoengine.errors` (e.g. `ValidationError`). Use `from mongoengine.errors import ErrorClass instead`. #1428
+- BREAKING CHANGE: Accessing a broken reference will raise a `DoesNotExist` error. In the past it used to return `None`. #1334
+- Fixed absent rounding for DecimalField when `force_string` is set. #1103
+
+Changes in 0.10.8
+=================
+- Added support for QuerySet.batch_size (#1426)
+- Fixed query set iteration within iteration #1427
+- Fixed an issue where specifying a MongoDB URI host would override more information than it should #1421
+- Added ability to filter the generic reference field by ObjectId and DBRef #1425
+- Fixed delete cascade for models with a custom primary key field #1247
+- Added ability to specify an authentication mechanism (e.g. X.509) #1333
+- Added support for falsey primary keys (e.g. doc.pk = 0) #1354
+- Fixed QuerySet#sum/average for fields w/ explicit db_field #1417
+- Fixed filtering by embedded_doc=None #1422
+- Added support for cursor.comment #1420
+- Fixed doc.get_<field>_display #1419
+- Fixed __repr__ method of the StrictDict #1424
+- Added a deprecation warning for Python 2.6
+
+Changes in 0.10.7
+=================
+- Dropped Python 3.2 support #1390
+- Fixed the bug where dynamic doc has index inside a dict field #1278
+- Fixed: ListField minus index assignment does not work #1128
+- Fixed cascade delete mixing among collections #1224
+- Add `signal_kwargs` argument to `Document.save`, `Document.delete` and `BaseQuerySet.insert` to be passed to signals calls #1206
+- Raise `OperationError` when trying to do a `drop_collection` on document with no collection set.
+- count on ListField of EmbeddedDocumentField fails. #1187
+- Fixed long fields stored as int32 in Python 3. #1253
+- MapField now handles unicodes keys correctly. #1267
+- ListField now handles negative indicies correctly. #1270
+- Fixed AttributeError when initializing EmbeddedDocument with positional args. #681
+- Fixed no_cursor_timeout error with pymongo 3.0+ #1304
+- Replaced map-reduce based QuerySet.sum/average with aggregation-based implementations #1336
+- Fixed support for `__` to escape field names that match operators names in `update` #1351
+- Fixed BaseDocument#_mark_as_changed #1369
+- Added support for pickling QuerySet instances. #1397
+- Fixed connecting to a list of hosts #1389
+- Fixed a bug where accessing broken references wouldn't raise a DoesNotExist error #1334
+- Fixed not being able to specify use_db_field=False on ListField(EmbeddedDocumentField) instances #1218
+- Improvements to the dictionary fields docs #1383
+
+Changes in 0.10.6
+=================
+- Add support for mocking MongoEngine based on mongomock. #1151
+- Fixed not being able to run tests on Windows. #1153
+- Allow creation of sparse compound indexes. #1114
+- count on ListField of EmbeddedDocumentField fails. #1187
+
+Changes in 0.10.5
+=================
+- Fix for reloading of strict with special fields. #1156
+
+Changes in 0.10.4
+=================
+- SaveConditionError is now importable from the top level package. #1165
+- upsert_one method added. #1157
+
+Changes in 0.10.3
+=================
+- Fix `read_preference` (it had chaining issues with PyMongo 2.x and it didn't work at all with PyMongo 3.x) #1042
+
+Changes in 0.10.2
+=================
+- Allow shard key to point to a field in an embedded document. #551
+- Allow arbirary metadata in fields. #1129
+- ReferenceFields now support abstract document types. #837
+
+Changes in 0.10.1
+=================
+- Fix infinite recursion with CASCADE delete rules under specific conditions. #1046
+- Fix CachedReferenceField bug when loading cached docs as DBRef but failing to save them. #1047
+- Fix ignored chained options #842
+- Document save's save_condition error raises `SaveConditionError` exception #1070
+- Fix Document.reload for DynamicDocument. #1050
+- StrictDict & SemiStrictDict are shadowed at init time. #1105
+- Fix ListField minus index assignment does not work. #1119
+- Remove code that marks field as changed when the field has default but not existed in database #1126
+- Remove test dependencies (nose and rednose) from install dependencies list. #1079
+- Recursively build query when using elemMatch operator. #1130
+- Fix instance back references for lists of embedded documents. #1131
+
+Changes in 0.10.0
+=================
+- Django support was removed and will be available as a separate extension. #958
+- Allow to load undeclared field with meta attribute 'strict': False #957
+- Support for PyMongo 3+ #946
+- Removed get_or_create() deprecated since 0.8.0. #300
+- Improve Document._created status when switch collection and db #1020
+- Queryset update doesn't go through field validation #453
+- Added support for specifying authentication source as option `authSource` in URI. #967
+- Fixed mark_as_changed to handle higher/lower level fields changed. #927
+- ListField of embedded docs doesn't set the _instance attribute when iterating over it #914
+- Support += and *= for ListField #595
+- Use sets for populating dbrefs to dereference
+- Fixed unpickled documents replacing the global field's list. #888
+- Fixed storage of microseconds in ComplexDateTimeField and unused separator option. #910
+- Don't send a "cls" option to ensureIndex (related to https://jira.mongodb.org/browse/SERVER-769)
+- Fix for updating sorting in SortedListField. #978
+- Added __ support to escape field name in fields lookup keywords that match operators names #949
+- Fix for issue where FileField deletion did not free space in GridFS.
+- No_dereference() not respected on embedded docs containing reference. #517
+- Document save raise an exception if save_condition fails #1005
+- Fixes some internal _id handling issue. #961
+- Updated URL and Email Field regex validators, added schemes argument to URLField validation. #652
+- Capped collection multiple of 256. #1011
+- Added `BaseQuerySet.aggregate_sum` and `BaseQuerySet.aggregate_average` methods.
+- Fix for delete with write_concern {'w': 0}. #1008
+- Allow dynamic lookup for more than two parts. #882
+- Added support for min_distance on geo queries. #831
+- Allow to add custom metadata to fields #705
+
+Changes in 0.9.0
+================
+- Update FileField when creating a new file #714
+- Added `EmbeddedDocumentListField` for Lists of Embedded Documents. #826
+- ComplexDateTimeField should fall back to None when null=True #864
+- Request Support for $min, $max Field update operators #863
+- `BaseDict` does not follow `setdefault` #866
+- Add support for $type operator # 766
+- Fix tests for pymongo 2.8+ #877
+- No module named 'django.utils.importlib' (Django dev) #872
+- Field Choices Now Accept Subclasses of Documents
+- Ensure Indexes before Each Save #812
+- Generate Unique Indices for Lists of EmbeddedDocuments #358
+- Sparse fields #515
+- write_concern not in params of Collection#remove #801
+- Better BaseDocument equality check when not saved #798
+- OperationError: Shard Keys are immutable. Tried to update id even though the document is not yet saved #771
+- with_limit_and_skip for count should default like in pymongo #759
+- Fix storing value of precision attribute in DecimalField #787
+- Set attribute to None does not work (at least for fields with default values) #734
+- Querying by a field defined in a subclass raises InvalidQueryError #744
+- Add Support For MongoDB 2.6.X's maxTimeMS #778
+- abstract shouldn't be inherited in EmbeddedDocument # 789
+- Allow specifying the '_cls' as a field for indexes #397
+- Stop ensure_indexes running on a secondaries unless connection is through mongos #746
+- Not overriding default values when loading a subset of fields #399
+- Saving document doesn't create new fields in existing collection #620
+- Added `Queryset.aggregate` wrapper to aggregation framework #703
+- Added support to show original model fields on to_json calls instead of db_field #697
+- Added Queryset.search_text to Text indexes searchs #700
+- Fixed tests for Django 1.7 #696
+- Follow ReferenceFields in EmbeddedDocuments with select_related #690
+- Added preliminary support for text indexes #680
+- Added `elemMatch` operator as well - `match` is too obscure #653
+- Added support for progressive JPEG #486 #548
+- Allow strings to be used in index creation #675
+- Fixed EmbeddedDoc weakref proxy issue #592
+- Fixed nested reference field distinct error #583
+- Fixed change tracking on nested MapFields #539
+- Dynamic fields in embedded documents now visible to queryset.only() / qs.exclude() #425 #507
+- Add authentication_source option to register_connection #178 #464 #573 #580 #590
+- Implemented equality between Documents and DBRefs #597
+- Fixed ReferenceField inside nested ListFields dereferencing problem #368
+- Added the ability to reload specific document fields #100
+- Added db_alias support and fixes for custom map/reduce output #586
+- post_save signal now has access to delta information about field changes #594 #589
+- Don't query with $orderby for qs.get() #600
+- Fix id shard key save issue #636
+- Fixes issue with recursive embedded document errors #557
+- Fix clear_changed_fields() clearing unsaved documents bug #602
+- Removing support for Django 1.4.x, pymongo 2.5.x, pymongo 2.6.x.
+- Removing support for Python < 2.6.6
+- Fixed $maxDistance location for geoJSON $near queries with MongoDB 2.6+ #664
+- QuerySet.modify() and Document.modify() methods to provide find_and_modify() like behaviour #677 #773
+- Added support for the using() method on a queryset #676
+- PYPY support #673
+- Connection pooling #674
+- Avoid to open all documents from cursors in an if stmt #655
+- Ability to clear the ordering #657
+- Raise NotUniqueError in Document.update() on pymongo.errors.DuplicateKeyError #626
+- Slots - memory improvements #625
+- Fixed incorrectly split a query key when it ends with "_" #619
+- Geo docs updates #613
+- Workaround a dateutil bug #608
+- Conditional save for atomic-style operations #511
+- Allow dynamic dictionary-style field access #559
+- Increase email field length to accommodate new TLDs #726
+- index_cls is ignored when deciding to set _cls as index prefix #733
+- Make 'db' argument to connection optional #737
+- Allow atomic update for the entire `DictField` #742
+- Added MultiPointField, MultiLineField, MultiPolygonField
+- Fix multiple connections aliases being rewritten #748
+- Fixed a few instances where reverse_delete_rule was written as reverse_delete_rules. #791
+- Make `in_bulk()` respect `no_dereference()` #775
+- Handle None from model __str__; Fixes #753 #754
+- _get_changed_fields fix for embedded documents with id field. #925
+
+Changes in 0.8.7
+================
+- Calling reload on deleted / nonexistent documents raises DoesNotExist (#538)
+- Stop ensure_indexes running on a secondaries (#555)
+- Fix circular import issue with django auth (#531) (#545)
+
+Changes in 0.8.6
+================
+- Fix django auth import (#531)
+
+Changes in 0.8.5
+================
+- Fix multi level nested fields getting marked as changed (#523)
+- Django 1.6 login fix (#522) (#527)
+- Django 1.6 session fix (#509)
+- EmbeddedDocument._instance is now set when setting the attribute (#506)
+- Fixed EmbeddedDocument with ReferenceField equality issue (#502)
+- Fixed GenericReferenceField serialization order (#499)
+- Fixed count and none bug (#498)
+- Fixed bug with .only() and DictField with digit keys (#496)
+- Added user_permissions to Django User object (#491, #492)
+- Fix updating Geo Location fields (#488)
+- Fix handling invalid dict field value (#485)
+- Added app_label to MongoUser (#484)
+- Use defaults when host and port are passed as None (#483)
+- Fixed distinct casting issue with ListField of EmbeddedDocuments (#470)
+- Fixed Django 1.6 sessions (#454, #480)
+
+Changes in 0.8.4
+================
+- Remove database name necessity in uri connection schema (#452)
+- Fixed "$pull" semantics for nested ListFields (#447)
+- Allow fields to be named the same as query operators (#445)
+- Updated field filter logic - can now exclude subclass fields (#443)
+- Fixed dereference issue with embedded listfield referencefields (#439)
+- Fixed slice when using inheritance causing fields to be excluded (#437)
+- Fixed ._get_db() attribute after a Document.switch_db() (#441)
+- Dynamic Fields store and recompose Embedded Documents / Documents correctly (#449)
+- Handle dynamic fieldnames that look like digits (#434)
+- Added get_user_document and improve mongo_auth module (#423)
+- Added str representation of GridFSProxy (#424)
+- Update transform to handle docs erroneously passed to unset (#416)
+- Fixed indexing - turn off _cls (#414)
+- Fixed dereference threading issue in ComplexField.__get__ (#412)
+- Fixed QuerySetNoCache.count() caching (#410)
+- Don't follow references in _get_changed_fields (#422, #417)
+- Allow args and kwargs to be passed through to_json (#420)
+
+Changes in 0.8.3
+================
+- Fixed EmbeddedDocuments with `id` also storing `_id` (#402)
+- Added get_proxy_object helper to filefields (#391)
+- Added QuerySetNoCache and QuerySet.no_cache() for lower memory consumption (#365)
+- Fixed sum and average mapreduce dot notation support (#375, #376, #393)
+- Fixed as_pymongo to return the id (#386)
+- Document.select_related() now respects `db_alias` (#377)
+- Reload uses shard_key if applicable (#384)
+- Dynamic fields are ordered based on creation and stored in _fields_ordered (#396)
+
+  **Potential breaking change:** http://docs.mongoengine.org/en/latest/upgrade.html#to-0-8-3
+
+- Fixed pickling dynamic documents `_dynamic_fields` (#387)
+- Fixed ListField setslice and delslice dirty tracking (#390)
+- Added Django 1.5 PY3 support (#392)
+- Added match ($elemMatch) support for EmbeddedDocuments (#379)
+- Fixed weakref being valid after reload (#374)
+- Fixed queryset.get() respecting no_dereference (#373)
+- Added full_result kwarg to update (#380)
+
+
+
+Changes in 0.8.2
+================
+- Added compare_indexes helper (#361)
+- Fixed cascading saves which weren't turned off as planned (#291)
+- Fixed Datastructures so instances are a Document or EmbeddedDocument (#363)
+- Improved cascading saves write performance (#361)
+- Fixed ambiguity and differing behaviour regarding field defaults (#349)
+- ImageFields now include PIL error messages if invalid error (#353)
+- Added lock when calling doc.Delete() for when signals have no sender (#350)
+- Reload forces read preference to be PRIMARY (#355)
+- Querysets are now lest restrictive when querying duplicate fields (#332, #333)
+- FileField now honouring db_alias (#341)
+- Removed customised __set__ change tracking in ComplexBaseField (#344)
+- Removed unused var in _get_changed_fields (#347)
+- Added pre_save_post_validation signal (#345)
+- DateTimeField now auto converts valid datetime isostrings into dates (#343)
+- DateTimeField now uses dateutil for parsing if available (#343)
+- Fixed Doc.objects(read_preference=X) not setting read preference (#352)
+- Django session ttl index expiry fixed (#329)
+- Fixed pickle.loads (#342)
+- Documentation fixes
+
+Changes in 0.8.1
+================
+- Fixed Python 2.6 django auth importlib issue (#326)
+- Fixed pickle unsaved document regression (#327)
+
+Changes in 0.8.0
+================
+- Fixed querying ReferenceField custom_id (#317)
+- Fixed pickle issues with collections (#316)
+- Added `get_next_value` preview for SequenceFields (#319)
+- Added no_sub_classes context manager and queryset helper (#312)
+- Querysets now utilises a local cache
+- Changed __len__ behaviour in the queryset (#247, #311)
+- Fixed querying string versions of ObjectIds issue with ReferenceField (#307)
+- Added $setOnInsert support for upserts (#308)
+- Upserts now possible with just query parameters (#309)
+- Upserting is the only way to ensure docs are saved correctly (#306)
+- Fixed register_delete_rule inheritance issue
+- Fix cloning of sliced querysets (#303)
+- Fixed update_one write concern (#302)
+- Updated minimum requirement for pymongo to 2.5
+- Add support for new geojson fields, indexes and queries (#299)
+- If values cant be compared mark as changed (#287)
+- Ensure as_pymongo() and to_json honour only() and exclude() (#293)
+- Document serialization uses field order to ensure a strict order is set (#296)
+- DecimalField now stores as float not string (#289)
+- UUIDField now stores as a binary by default (#292)
+- Added Custom User Model for Django 1.5 (#285)
+- Cascading saves now default to off (#291)
+- ReferenceField now store ObjectId's by default rather than DBRef (#290)
+- Added ImageField support for inline replacements (#86)
+- Added SequenceField.set_next_value(value) helper (#159)
+- Updated .only() behaviour - now like exclude it is chainable (#202)
+- Added with_limit_and_skip support to count() (#235)
+- Objects queryset manager now inherited (#256)
+- Updated connection to use MongoClient (#262, #274)
+- Fixed db_alias and inherited Documents (#143)
+- Documentation update for document errors (#124)
+- Deprecated `get_or_create` (#35)
+- Updated inheritable objects created by upsert now contain _cls (#118)
+- Added support for creating documents with embedded documents in a single operation (#6)
+- Added to_json and from_json to Document (#1)
+- Added to_json and from_json to QuerySet (#131)
+- Updated index creation now tied to Document class (#102)
+- Added none() to queryset (#127)
+- Updated SequenceFields to allow post processing of the calculated counter value (#141)
+- Added clean method to documents for pre validation data cleaning (#60)
+- Added support setting for read prefrence at a query level (#157)
+- Added _instance to EmbeddedDocuments pointing to the parent (#139)
+- Inheritance is off by default (#122)
+- Remove _types and just use _cls for inheritance (#148)
+- Only allow QNode instances to be passed as query objects (#199)
+- Dynamic fields are now validated on save (#153) (#154)
+- Added support for multiple slices and made slicing chainable. (#170) (#190) (#191)
+- Fixed GridFSProxy __getattr__ behaviour (#196)
+- Fix Django timezone support (#151)
+- Simplified Q objects, removed QueryTreeTransformerVisitor (#98) (#171)
+- FileFields now copyable (#198)
+- Querysets now return clones and are no longer edit in place (#56)
+- Added support for $maxDistance (#179)
+- Uses getlasterror to test created on updated saves (#163)
+- Fixed inheritance and unique index creation (#140)
+- Fixed reverse delete rule with inheritance (#197)
+- Fixed validation for GenericReferences which haven't been dereferenced
+- Added switch_db context manager (#106)
+- Added switch_db method to document instances (#106)
+- Added no_dereference context manager (#82) (#61)
+- Added switch_collection context manager (#220)
+- Added switch_collection method to document instances (#220)
+- Added support for compound primary keys (#149) (#121)
+- Fixed overriding objects with custom manager (#58)
+- Added no_dereference method for querysets (#82) (#61)
+- Undefined data should not override instance methods (#49)
+- Added Django Group and Permission (#142)
+- Added Doc class and pk to Validation messages (#69)
+- Fixed Documents deleted via a queryset don't call any signals (#105)
+- Added the "get_decoded" method to the MongoSession class (#216)
+- Fixed invalid choices error bubbling (#214)
+- Updated Save so it calls $set and $unset in a single operation (#211)
+- Fixed inner queryset looping (#204)
+
+Changes in 0.7.10
+=================
+- Fix UnicodeEncodeError for dbref (#278)
+- Allow construction using positional parameters (#268)
+- Updated EmailField length to support long domains (#243)
+- Added 64-bit integer support (#251)
+- Added Django sessions TTL support (#224)
+- Fixed issue with numerical keys in MapField(EmbeddedDocumentField()) (#240)
+- Fixed clearing _changed_fields for complex nested embedded documents (#237, #239, #242)
+- Added "id" back to _data dictionary (#255)
+- Only mark a field as changed if the value has changed (#258)
+- Explicitly check for Document instances when dereferencing (#261)
+- Fixed order_by chaining issue (#265)
+- Added dereference support for tuples (#250)
+- Resolve field name to db field name when using distinct(#260, #264, #269)
+- Added kwargs to doc.save to help interop with django (#223, #270)
+- Fixed cloning querysets in PY3
+- Int fields no longer unset in save when changed to 0 (#272)
+- Fixed ReferenceField query chaining bug fixed (#254)
+
+Changes in 0.7.9
+================
+- Better fix handling for old style _types
+- Embedded SequenceFields follow collection naming convention
+
+Changes in 0.7.8
+================
+- Fix sequence fields in embedded documents (#166)
+- Fix query chaining with .order_by() (#176)
+- Added optional encoding and collection config for Django sessions (#180, #181, #183)
+- Fixed EmailField so can add extra validation (#173, #174, #187)
+- Fixed bulk inserts can now handle custom pk's (#192)
+- Added as_pymongo method to return raw or cast results from pymongo (#193)
+
+Changes in 0.7.7
+================
+- Fix handling for old style _types
+
+Changes in 0.7.6
+================
+- Unicode fix for repr (#133)
+- Allow updates with match operators (#144)
+- Updated URLField - now can have a override the regex (#136)
+- Allow Django AuthenticationBackends to work with Django user (hmarr/mongoengine#573)
+- Fixed reload issue with ReferenceField where dbref=False (#138)
+
+Changes in 0.7.5
+================
+- ReferenceFields with dbref=False use ObjectId instead of strings (#134)
+  See ticket for upgrade notes (#134)
+
+Changes in 0.7.4
+================
+- Fixed index inheritance issues - firmed up testcases (#123) (#125)
+
+Changes in 0.7.3
+================
+- Reverted EmbeddedDocuments meta handling - now can turn off inheritance (#119)
+
+Changes in 0.7.2
+================
+- Update index spec generation so its not destructive (#113)
+
+Changes in 0.7.1
+================
+- Fixed index spec inheritance (#111)
+
+Changes in 0.7.0
+================
+- Updated queryset.delete so you can use with skip / limit (#107)
+- Updated index creation allows kwargs to be passed through refs (#104)
+- Fixed Q object merge edge case (#109)
+- Fixed reloading on sharded documents (hmarr/mongoengine#569)
+- Added NotUniqueError for duplicate keys (#62)
+- Added custom collection / sequence naming for SequenceFields (#92)
+- Fixed UnboundLocalError in composite index with pk field (#88)
 - Updated ReferenceField's to optionally store ObjectId strings
-  this will become the default in 0.8 (MongoEngine/mongoengine#89)
+  this will become the default in 0.8 (#89)
 - Added FutureWarning - save will default to `cascade=False` in 0.8
-- Added example of indexing embedded document fields (MongoEngine/mongoengine#75)
+- Added example of indexing embedded document fields (#75)
-- Fixed ImageField resizing when forcing size (MongoEngine/mongoengine#80)
+- Fixed ImageField resizing when forcing size (#80)
-- Add flexibility for fields handling bad data (MongoEngine/mongoengine#78)
+- Add flexibility for fields handling bad data (#78)
 - Embedded Documents no longer handle meta definitions
-- Use weakref proxies in base lists / dicts (MongoEngine/mongoengine#74)
+- Use weakref proxies in base lists / dicts (#74)
 - Improved queryset filtering (hmarr/mongoengine#554)
 - Fixed Dynamic Documents and Embedded Documents (hmarr/mongoengine#561)
-- Fixed abstract classes and shard keys (MongoEngine/mongoengine#64)
+- Fixed abstract classes and shard keys (#64)
 - Fixed Python 2.5 support
 - Added Python 3 support (thanks to Laine Heron)
 
 Changes in 0.6.20
 =================
-- Added support for distinct and db_alias (MongoEngine/mongoengine#59)
+- Added support for distinct and db_alias (#59)
 - Improved support for chained querysets when constraining the same fields (hmarr/mongoengine#554)
-- Fixed BinaryField lookup re (MongoEngine/mongoengine#48)
+- Fixed BinaryField lookup re (#48)
 
 Changes in 0.6.19
 =================
 
-- Added Binary support to UUID (MongoEngine/mongoengine#47)
+- Added Binary support to UUID (#47)
-- Fixed MapField lookup for fields without declared lookups (MongoEngine/mongoengine#46)
+- Fixed MapField lookup for fields without declared lookups (#46)
-- Fixed BinaryField python value issue (MongoEngine/mongoengine#48)
+- Fixed BinaryField python value issue (#48)
-- Fixed SequenceField non numeric value lookup (MongoEngine/mongoengine#41)
+- Fixed SequenceField non numeric value lookup (#41)
-- Fixed queryset manager issue (MongoEngine/mongoengine#52)
+- Fixed queryset manager issue (#52)
 - Fixed FileField comparision (hmarr/mongoengine#547)
 
 Changes in 0.6.18
@@ -80,7 +572,7 @@ Changes in 0.6.12
 - Fixes error with _delta handling DBRefs
 
 Changes in 0.6.11
-==================
+=================
 - Fixed inconsistency handling None values field attrs
 - Fixed map_field embedded db_field issue
 - Fixed .save() _delta issue with DbRefs
@@ -160,7 +652,7 @@ Changes in 0.6.1
 - Fix for replicaSet connections
 
 Changes in 0.6
-================
+==============
 
 - Added FutureWarning to inherited classes not declaring 'allow_inheritance' as the default will change in 0.7
 - Added support for covered indexes when inheritance is off
@@ -249,7 +741,7 @@ Changes in v0.5
 - Added Document Mixin support
 - Fixed queryet __repr__ mid iteration
 - Added hint() support, so can tell Mongo the proper index to use for the query
-- Fixed issue with inconsitent setting of _cls breaking inherited referencing
+- Fixed issue with inconsistent setting of _cls breaking inherited referencing
 - Added help_text and verbose_name to fields to help with some form libs
 - Updated item_frequencies to handle embedded document lookups
 - Added delta tracking now only sets / unsets explicitly changed fields

docs/code/tumblelog.py

@@ -17,6 +17,10 @@ class Post(Document):
     tags = ListField(StringField(max_length=30))
     comments = ListField(EmbeddedDocumentField(Comment))
 
+    # bugfix
+    meta = {'allow_inheritance': True}
+
+
 class TextPost(Post):
     content = StringField()
 
@@ -45,7 +49,8 @@ print 'ALL POSTS'
 print
 for post in Post.objects:
     print post.title
-    print '=' * len(post.title)
+    #print '=' * post.title.count()
+    print "=" * 20
 
     if isinstance(post, TextPost):
         print post.content

docs/conf.py

@@ -13,10 +13,14 @@
 
 import sys, os
 
+import sphinx_rtd_theme
+
+import mongoengine
+
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the
 # documentation root, use os.path.abspath to make it absolute, like shown here.
-sys.path.append(os.path.abspath('..'))
+sys.path.insert(0, os.path.abspath('..'))
 
 # -- General configuration -----------------------------------------------------
 
@@ -38,13 +42,12 @@ master_doc = 'index'
 
 # General information about the project.
 project = u'MongoEngine'
-copyright = u'2009-2012, MongoEngine Authors'
+copyright = u'2009, MongoEngine Authors'
 
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the
 # built documents.
 #
-import mongoengine
 # The short X.Y version.
 version = mongoengine.get_version()
 # The full version, including alpha/beta/rc tags.
@@ -92,15 +95,17 @@ pygments_style = 'sphinx'
 
 # The theme to use for HTML and HTML Help pages.  Major themes that come with
 # Sphinx are currently 'default' and 'sphinxdoc'.
-html_theme = 'nature'
+html_theme = 'sphinx_rtd_theme'
 
 # Theme options are theme-specific and customize the look and feel of a theme
 # further.  For a list of options available for each theme, see the
 # documentation.
-#html_theme_options = {}
+html_theme_options = {
+    'canonical_url': 'http://docs.mongoengine.org/en/latest/'
+}
 
 # Add any paths that contain custom themes here, relative to this directory.
-html_theme_path = ['_themes']
+html_theme_path = [sphinx_rtd_theme.get_html_theme_path()]
 
 # The name for this set of Sphinx documents.  If None, it defaults to
 # "<project> v<release> documentation".
@@ -116,7 +121,7 @@ html_theme_path = ['_themes']
 # The name of an image file (within the static path) to use as favicon of the
 # docs.  This file should be a Windows icon file (.ico) being 16x16 or 32x32
 # pixels large.
-#html_favicon = None
+html_favicon = "favicon.ico"
 
 # Add any paths that contain custom static files (such as style sheets) here,
 # relative to this directory. They are copied after the builtin static files,
@@ -132,7 +137,11 @@ html_theme_path = ['_themes']
 html_use_smartypants = True
 
 # Custom sidebar templates, maps document names to template names.
-#html_sidebars = {}
+html_sidebars = {
+    'index': ['globaltoc.html', 'searchbox.html'],
+    '**': ['localtoc.html', 'relations.html', 'searchbox.html']
+}
+
 
 # Additional templates that should be rendered to pages, maps page names to
 # template names.
@@ -173,8 +182,8 @@ latex_paper_size = 'a4'
 # Grouping the document tree into LaTeX files. List of tuples
 # (source start file, target name, title, author, documentclass [howto/manual]).
 latex_documents = [
-  ('index', 'MongoEngine.tex', u'MongoEngine Documentation',
+  ('index', 'MongoEngine.tex', 'MongoEngine Documentation',
-   u'Harry Marr', 'manual'),
+   'Ross Lawley', 'manual'),
 ]
 
 # The name of an image file (relative to this directory) to place at the top of
@@ -193,3 +202,5 @@ latex_documents = [
 
 # If false, no module index is generated.
 #latex_use_modindex = True
+
+autoclass_content = 'both'

docs/django.rst

@@ -1,90 +1,19 @@
-=============================
-Using MongoEngine with Django
-=============================
-
-.. note :: Updated to support Django 1.4
-
-Connecting
-==========
-In your **settings.py** file, ignore the standard database settings (unless you
-also plan to use the ORM in your project), and instead call
-:func:`~mongoengine.connect` somewhere in the settings module.
-
-Authentication
 ==============
-MongoEngine includes a Django authentication backend, which uses MongoDB. The
+Django Support
-:class:`~mongoengine.django.auth.User` model is a MongoEngine
+==============
-:class:`~mongoengine.Document`, but implements most of the methods and
-attributes that the standard Django :class:`User` model does - so the two are
-moderately compatible. Using this backend will allow you to store users in
-MongoDB but still use many of the Django authentication infrastucture (such as
-the :func:`login_required` decorator and the :func:`authenticate` function). To
-enable the MongoEngine auth backend, add the following to you **settings.py**
-file::
 
-    AUTHENTICATION_BACKENDS = (
+.. note:: Django support has been split from the main MongoEngine
-        'mongoengine.django.auth.MongoEngineBackend',
+    repository. The *legacy* Django extension may be found bundled with the
-    )
+    0.9 release of MongoEngine.
 
-The :mod:`~mongoengine.django.auth` module also contains a
-:func:`~mongoengine.django.auth.get_user` helper function, that takes a user's
-:attr:`id` and returns a :class:`~mongoengine.django.auth.User` object.
 
-.. versionadded:: 0.1.3
 
-Sessions
+Help Wanted!
-========
+------------
-Django allows the use of different backend stores for its sessions. MongoEngine
-provides a MongoDB-based session backend for Django, which allows you to use
-sessions in you Django application with just MongoDB. To enable the MongoEngine
-session backend, ensure that your settings module has
-``'django.contrib.sessions.middleware.SessionMiddleware'`` in the
-``MIDDLEWARE_CLASSES`` field  and ``'django.contrib.sessions'`` in your
-``INSTALLED_APPS``. From there, all you need to do is add the following line
-into you settings module::
 
-    SESSION_ENGINE = 'mongoengine.django.sessions'
+The MongoEngine team is looking for help contributing and maintaining a new
-
+Django extension for MongoEngine! If you have Django experience and would like
-.. versionadded:: 0.2.1
+to help contribute to the project, please get in touch on the 
-
+`mailing list <http://groups.google.com/group/mongoengine-users>`_ or by 
-Storage
+simply contributing on
-=======
+`GitHub <https://github.com/MongoEngine/django-mongoengine>`_.
-With MongoEngine's support for GridFS via the :class:`~mongoengine.FileField`,
-it is useful to have a Django file storage backend that wraps this. The new
-storage module is called :class:`~mongoengine.django.storage.GridFSStorage`.
-Using it is very similar to using the default FileSystemStorage.::
-
-    from mongoengine.django.storage import GridFSStorage
-    fs = GridFSStorage()
-
-    filename = fs.save('hello.txt', 'Hello, World!')
-
-All of the `Django Storage API methods
-<http://docs.djangoproject.com/en/dev/ref/files/storage/>`_ have been
-implemented except :func:`path`. If the filename provided already exists, an
-underscore and a number (before # the file extension, if one exists) will be
-appended to the filename until the generated filename doesn't exist. The
-:func:`save` method will return the new filename.::
-
-    >>> fs.exists('hello.txt')
-    True
-    >>> fs.open('hello.txt').read()
-    'Hello, World!'
-    >>> fs.size('hello.txt')
-    13
-    >>> fs.url('hello.txt')
-    'http://your_media_url/hello.txt'
-    >>> fs.open('hello.txt').name
-    'hello.txt'
-    >>> fs.listdir()
-    ([], [u'hello.txt'])
-
-All files will be saved and retrieved in GridFS via the :class::`FileDocument`
-document, allowing easy access to the files without the GridFSStorage
-backend.::
-
-    >>> from mongoengine.django.storage import FileDocument
-    >>> FileDocument.objects()
-    [<FileDocument: FileDocument object>]
-
-.. versionadded:: 0.4

docs/guide/connecting.rst

@@ -6,60 +6,134 @@ Connecting to MongoDB
 
 To connect to a running instance of :program:`mongod`, use the
 :func:`~mongoengine.connect` function. The first argument is the name of the
-database to connect to. If the database does not exist, it will be created. If
+database to connect to::
-the database requires authentication, :attr:`username` and :attr:`password`
-arguments may be provided::
 
     from mongoengine import connect
-    connect('project1', username='webapp', password='pwd123')
+    connect('project1')
 
 By default, MongoEngine assumes that the :program:`mongod` instance is running
-on **localhost** on port **27017**. If MongoDB is running elsewhere, you may
+on **localhost** on port **27017**. If MongoDB is running elsewhere, you should
-provide :attr:`host` and :attr:`port` arguments to
+provide the :attr:`host` and :attr:`port` arguments to
 :func:`~mongoengine.connect`::
 
     connect('project1', host='192.168.1.35', port=12345)
 
-Uri style connections are also supported as long as you include the database
+If the database requires authentication, :attr:`username` and :attr:`password`
-name - just supply the uri as the :attr:`host` to
+arguments should be provided::
+
+    connect('project1', username='webapp', password='pwd123')
+
+URI style connections are also supported -- just supply the URI as
+the :attr:`host` to
 :func:`~mongoengine.connect`::
 
     connect('project1', host='mongodb://localhost/database_name')
 
-ReplicaSets
+.. note:: Database, username and password from URI string overrides
-===========
+    corresponding parameters in :func:`~mongoengine.connect`: ::
 
-MongoEngine now supports :func:`~pymongo.replica_set_connection.ReplicaSetConnection`
+        connect(
-to use them please use a URI style connection and provide the `replicaSet` name in the
+            db='test',
-connection kwargs.
+            username='user',
+            password='12345',
+            host='mongodb://admin:qwerty@localhost/production'
+        )
+
+    will establish connection to ``production`` database using
+    ``admin`` username and ``qwerty`` password.
+
+Replica Sets
+============
+
+MongoEngine supports connecting to replica sets::
+
+    from mongoengine import connect
+
+    # Regular connect
+    connect('dbname', replicaset='rs-name')
+
+    # MongoDB URI-style connect
+    connect(host='mongodb://localhost/dbname?replicaSet=rs-name')
+
+Read preferences are supported through the connection or via individual
+queries by passing the read_preference ::
+
+    Bar.objects().read_preference(ReadPreference.PRIMARY)
+    Bar.objects(read_preference=ReadPreference.PRIMARY)
 
 Multiple Databases
 ==================
 
-Multiple database support was added in MongoEngine 0.6. To use multiple
+To use multiple databases you can use :func:`~mongoengine.connect` and provide
-databases you can use :func:`~mongoengine.connect` and provide an `alias` name
+an `alias` name for the connection - if no `alias` is provided then "default"
-for the connection - if no `alias` is provided then "default" is used.
+is used.
 
 In the background this uses :func:`~mongoengine.register_connection` to
 store the data and you can register all aliases up front if required.
 
 Individual documents can also support multiple databases by providing a
-`db_alias` in their meta data.  This allows :class:`~pymongo.dbref.DBRef` objects
+`db_alias` in their meta data. This allows :class:`~pymongo.dbref.DBRef`
-to point across databases and collections.  Below is an example schema, using
+objects to point across databases and collections. Below is an example schema,
-3 different databases to store data::
+using 3 different databases to store data::
 
         class User(Document):
             name = StringField()
 
-            meta = {"db_alias": "user-db"}
+            meta = {'db_alias': 'user-db'}
 
         class Book(Document):
             name = StringField()
 
-            meta = {"db_alias": "book-db"}
+            meta = {'db_alias': 'book-db'}
 
         class AuthorBooks(Document):
             author = ReferenceField(User)
             book = ReferenceField(Book)
 
-            meta = {"db_alias": "users-books-db"}
+            meta = {'db_alias': 'users-books-db'}
+
+
+Context Managers
+================
+Sometimes you may want to switch the database or collection to query against.
+For example, archiving older data into a separate database for performance
+reasons or writing functions that dynamically choose collections to write
+a document to.
+
+Switch Database
+---------------
+The :class:`~mongoengine.context_managers.switch_db` context manager allows
+you to change the database alias for a given class allowing quick and easy
+access to the same User document across databases::
+
+    from mongoengine.context_managers import switch_db
+
+    class User(Document):
+        name = StringField()
+
+        meta = {'db_alias': 'user-db'}
+
+    with switch_db(User, 'archive-user-db') as User:
+        User(name='Ross').save()  # Saves the 'archive-user-db'
+
+
+Switch Collection
+-----------------
+The :class:`~mongoengine.context_managers.switch_collection` context manager
+allows you to change the collection for a given class allowing quick and easy
+access to the same Group document across collection::
+
+        from mongoengine.context_managers import switch_collection
+
+        class Group(Document):
+            name = StringField()
+
+        Group(name='test').save()  # Saves in the default db
+
+        with switch_collection(Group, 'group2000') as Group:
+            Group(name='hello Group 2000 collection!').save()  # Saves in group2000 collection
+
+
+.. note:: Make sure any aliases have been registered with
+    :func:`~mongoengine.register_connection` or :func:`~mongoengine.connect`
+    before using the context manager.

docs/guide/defining-documents.rst

@@ -4,7 +4,7 @@ Defining documents
 In MongoDB, a **document** is roughly equivalent to a **row** in an RDBMS. When
 working with relational databases, rows are stored in **tables**, which have a
 strict **schema** that the rows follow. MongoDB stores documents in
-**collections** rather than tables - the principle difference is that no schema
+**collections** rather than tables --- the principal difference is that no schema
 is enforced at a database level.
 
 Defining a document's schema
@@ -22,11 +22,14 @@ objects** as class attributes to the document class::
 
     class Page(Document):
         title = StringField(max_length=200, required=True)
-        date_modified = DateTimeField(default=datetime.datetime.now)
+        date_modified = DateTimeField(default=datetime.datetime.utcnow)
+
+As BSON (the binary format for storing data in mongodb) is order dependent,
+documents are serialized based on their field order.
 
 Dynamic document schemas
 ========================
-One of the benefits of MongoDb is dynamic schemas for a collection, whilst data
+One of the benefits of MongoDB is dynamic schemas for a collection, whilst data
 should be planned and organised (after all explicit is better than implicit!)
 there are scenarios where having dynamic / expando style documents is desirable.
 
@@ -51,6 +54,7 @@ be saved ::
 
    There is one caveat on Dynamic Documents: fields cannot start with `_`
 
+Dynamic fields are stored in creation order *after* any declared fields.
 
 Fields
 ======
@@ -62,31 +66,40 @@ not provided. Default values may optionally be a callable, which will be called
 to retrieve the value (such as in the above example). The field types available
 are as follows:
 
-* :class:`~mongoengine.BinaryField`
+* :class:`~mongoengine.fields.BinaryField`
-* :class:`~mongoengine.BooleanField`
+* :class:`~mongoengine.fields.BooleanField`
-* :class:`~mongoengine.ComplexDateTimeField`
+* :class:`~mongoengine.fields.ComplexDateTimeField`
-* :class:`~mongoengine.DateTimeField`
+* :class:`~mongoengine.fields.DateTimeField`
-* :class:`~mongoengine.DecimalField`
+* :class:`~mongoengine.fields.DecimalField`
-* :class:`~mongoengine.DictField`
+* :class:`~mongoengine.fields.DictField`
-* :class:`~mongoengine.DynamicField`
+* :class:`~mongoengine.fields.DynamicField`
-* :class:`~mongoengine.EmailField`
+* :class:`~mongoengine.fields.EmailField`
-* :class:`~mongoengine.EmbeddedDocumentField`
+* :class:`~mongoengine.fields.EmbeddedDocumentField`
-* :class:`~mongoengine.FileField`
+* :class:`~mongoengine.fields.EmbeddedDocumentListField`
-* :class:`~mongoengine.FloatField`
+* :class:`~mongoengine.fields.FileField`
-* :class:`~mongoengine.GenericEmbeddedDocumentField`
+* :class:`~mongoengine.fields.FloatField`
-* :class:`~mongoengine.GenericReferenceField`
+* :class:`~mongoengine.fields.GenericEmbeddedDocumentField`
-* :class:`~mongoengine.GeoPointField`
+* :class:`~mongoengine.fields.GenericReferenceField`
-* :class:`~mongoengine.ImageField`
+* :class:`~mongoengine.fields.GenericLazyReferenceField`
-* :class:`~mongoengine.IntField`
+* :class:`~mongoengine.fields.GeoPointField`
-* :class:`~mongoengine.ListField`
+* :class:`~mongoengine.fields.ImageField`
-* :class:`~mongoengine.MapField`
+* :class:`~mongoengine.fields.IntField`
-* :class:`~mongoengine.ObjectIdField`
+* :class:`~mongoengine.fields.ListField`
-* :class:`~mongoengine.ReferenceField`
+* :class:`~mongoengine.fields.MapField`
-* :class:`~mongoengine.SequenceField`
+* :class:`~mongoengine.fields.ObjectIdField`
-* :class:`~mongoengine.SortedListField`
+* :class:`~mongoengine.fields.ReferenceField`
-* :class:`~mongoengine.StringField`
+* :class:`~mongoengine.fields.LazyReferenceField`
-* :class:`~mongoengine.URLField`
+* :class:`~mongoengine.fields.SequenceField`
-* :class:`~mongoengine.UUIDField`
+* :class:`~mongoengine.fields.SortedListField`
+* :class:`~mongoengine.fields.StringField`
+* :class:`~mongoengine.fields.URLField`
+* :class:`~mongoengine.fields.UUIDField`
+* :class:`~mongoengine.fields.PointField`
+* :class:`~mongoengine.fields.LineStringField`
+* :class:`~mongoengine.fields.PolygonField`
+* :class:`~mongoengine.fields.MultiPointField`
+* :class:`~mongoengine.fields.MultiLineStringField`
+* :class:`~mongoengine.fields.MultiPolygonField`
 
 Field arguments
 ---------------
@@ -96,9 +109,6 @@ arguments can be set on all fields:
 :attr:`db_field` (Default: None)
     The MongoDB field name.
 
-:attr:`name` (Default: None)
-    The mongoengine field name.
-
 :attr:`required` (Default: False)
     If set to True and the field is not set on the document instance, a
     :class:`~mongoengine.ValidationError` will be raised when the document is
@@ -107,10 +117,10 @@ arguments can be set on all fields:
 :attr:`default` (Default: None)
     A value to use when no value is set for this field.
 
-    The definion of default parameters follow `the general rules on Python
+    The definition of default parameters follow `the general rules on Python
     <http://docs.python.org/reference/compound_stmts.html#function-definitions>`__,
     which means that some care should be taken when dealing with default mutable objects
-    (like in :class:`~mongoengine.ListField` or :class:`~mongoengine.DictField`)::
+    (like in :class:`~mongoengine.fields.ListField` or :class:`~mongoengine.fields.DictField`)::
 
         class ExampleFirst(Document):
             # Default an empty list
@@ -125,6 +135,7 @@ arguments can be set on all fields:
             # instead to just an object
             values = ListField(IntField(), default=[1,2,3])
 
+    .. note:: Unsetting a field with a default value will revert back to the default.
 
 :attr:`unique` (Default: False)
     When True, no documents in the collection will have the same value for this
@@ -135,10 +146,13 @@ arguments can be set on all fields:
     field, will not have two documents in the collection with the same value.
 
 :attr:`primary_key` (Default: False)
-    When True, use this field as a primary key for the collection.
+    When True, use this field as a primary key for the collection.  `DictField`
+    and `EmbeddedDocuments` both support being the primary key for a document.
+
+    .. note:: If set, this field is also accessible through the `pk` field.
 
 :attr:`choices` (Default: None)
-    An iterable (e.g. a list or tuple) of choices to which the value of this
+    An iterable (e.g. list, tuple or set) of choices to which the value of this
     field should be limited.
 
     Can be either be a nested tuples of value (stored in mongo) and a
@@ -161,18 +175,18 @@ arguments can be set on all fields:
         class Shirt(Document):
             size = StringField(max_length=3, choices=SIZE)
 
-:attr:`help_text` (Default: None)
+:attr:`**kwargs` (Optional)
-    Optional help text to output with the field - used by form libraries
+    You can supply additional metadata as arbitrary additional keyword
-
+    arguments.  You can not override existing attributes, however.  Common
-:attr:`verbose_name` (Default: None)
+    choices include `help_text` and `verbose_name`, commonly used by form and
-    Optional human-readable name for the field - used by form libraries
+    widget libraries.
 
 
 List fields
 -----------
-MongoDB allows the storage of lists of items. To add a list of items to a
+MongoDB allows storing lists of items. To add a list of items to a
-:class:`~mongoengine.Document`, use the :class:`~mongoengine.ListField` field
+:class:`~mongoengine.Document`, use the :class:`~mongoengine.fields.ListField` field
-type. :class:`~mongoengine.ListField` takes another field object as its first
+type. :class:`~mongoengine.fields.ListField` takes another field object as its first
 argument, which specifies which type elements may be stored within the list::
 
     class Page(Document):
@@ -190,7 +204,7 @@ inherit from :class:`~mongoengine.EmbeddedDocument` rather than
         content = StringField()
 
 To embed the document within another document, use the
-:class:`~mongoengine.EmbeddedDocumentField` field type, providing the embedded
+:class:`~mongoengine.fields.EmbeddedDocumentField` field type, providing the embedded
 document class as the first argument::
 
     class Page(Document):
@@ -202,17 +216,17 @@ document class as the first argument::
 
 Dictionary Fields
 -----------------
-Often, an embedded document may be used instead of a dictionary -- generally
+Often, an embedded document may be used instead of a dictionary – generally
-this is recommended as dictionaries don't support validation or custom field
+embedded documents are recommended as dictionaries don’t support validation
-types. However, sometimes you will not know the structure of what you want to
+or custom field types. However, sometimes you will not know the structure of what you want to
-store; in this situation a :class:`~mongoengine.DictField` is appropriate::
+store; in this situation a :class:`~mongoengine.fields.DictField` is appropriate::
 
     class SurveyResponse(Document):
         date = DateTimeField()
         user = ReferenceField(User)
         answers = DictField()
 
-    survey_response = SurveyResponse(date=datetime.now(), user=request.user)
+    survey_response = SurveyResponse(date=datetime.utcnow(), user=request.user)
     response_form = ResponseForm(request.POST)
     survey_response.answers = response_form.cleaned_data()
     survey_response.save()
@@ -223,7 +237,7 @@ other objects, so are the most flexible field type available.
 Reference fields
 ----------------
 References may be stored to other documents in the database using the
-:class:`~mongoengine.ReferenceField`. Pass in another document class as the
+:class:`~mongoengine.fields.ReferenceField`. Pass in another document class as the
 first argument to the constructor, then simply assign document objects to the
 field::
 
@@ -244,9 +258,9 @@ field::
 The :class:`User` object is automatically turned into a reference behind the
 scenes, and dereferenced when the :class:`Page` object is retrieved.
 
-To add a :class:`~mongoengine.ReferenceField` that references the document
+To add a :class:`~mongoengine.fields.ReferenceField` that references the document
 being defined, use the string ``'self'`` in place of the document class as the
-argument to :class:`~mongoengine.ReferenceField`'s constructor. To reference a
+argument to :class:`~mongoengine.fields.ReferenceField`'s constructor. To reference a
 document that has not yet been defined, use the name of the undefined document
 as the constructor's argument::
 
@@ -287,6 +301,12 @@ instance of the object to the query::
     # Find all pages that both Bob and John have authored
     Page.objects(authors__all=[bob, john])
 
+    # Remove Bob from the authors for a page.
+    Page.objects(id='...').update_one(pull__authors=bob)
+
+    # Add John to the authors for a page.
+    Page.objects(id='...').update_one(push__authors=john)
+
 
 Dealing with deletion of referred documents
 '''''''''''''''''''''''''''''''''''''''''''
@@ -298,12 +318,12 @@ reference with a delete rule specification.  A delete rule is specified by
 supplying the :attr:`reverse_delete_rule` attributes on the
 :class:`ReferenceField` definition, like this::
 
-    class Employee(Document):
+    class ProfilePage(Document):
         ...
-        profile_page = ReferenceField('ProfilePage', reverse_delete_rule=mongoengine.NULLIFY)
+        employee = ReferenceField('Employee', reverse_delete_rule=mongoengine.CASCADE)
 
 The declaration in this example means that when an :class:`Employee` object is
-removed, the :class:`ProfilePage` that belongs to that employee is removed as
+removed, the :class:`ProfilePage` that references that employee is removed as
 well.  If a whole batch of employees is removed, all profile pages that are
 linked are removed as well.
 
@@ -319,12 +339,12 @@ Its value can take any of the following constants:
   Any object's fields still referring to the object being deleted are removed
   (using MongoDB's "unset" operation), effectively nullifying the relationship.
 :const:`mongoengine.CASCADE`
-  Any object containing fields that are refererring to the object being deleted
+  Any object containing fields that are referring to the object being deleted
   are deleted first.
 :const:`mongoengine.PULL`
   Removes the reference to the object (using MongoDB's "pull" operation)
   from any object's fields of
-  :class:`~mongoengine.ListField` (:class:`~mongoengine.ReferenceField`).
+  :class:`~mongoengine.fields.ListField` (:class:`~mongoengine.fields.ReferenceField`).
 
 
 .. warning::
@@ -343,11 +363,10 @@ Its value can take any of the following constants:
    In Django, be sure to put all apps that have such delete rule declarations in
    their :file:`models.py` in the :const:`INSTALLED_APPS` tuple.
 
-
 Generic reference fields
 ''''''''''''''''''''''''
 A second kind of reference field also exists,
-:class:`~mongoengine.GenericReferenceField`. This allows you to reference any
+:class:`~mongoengine.fields.GenericReferenceField`. This allows you to reference any
 kind of :class:`~mongoengine.Document`, and hence doesn't take a
 :class:`~mongoengine.Document` subclass as a constructor argument::
 
@@ -371,18 +390,18 @@ kind of :class:`~mongoengine.Document`, and hence doesn't take a
 
 .. note::
 
-   Using :class:`~mongoengine.GenericReferenceField`\ s is slightly less
+   Using :class:`~mongoengine.fields.GenericReferenceField`\ s is slightly less
-   efficient than the standard :class:`~mongoengine.ReferenceField`\ s, so if
+   efficient than the standard :class:`~mongoengine.fields.ReferenceField`\ s, so if
    you will only be referencing one document type, prefer the standard
-   :class:`~mongoengine.ReferenceField`.
+   :class:`~mongoengine.fields.ReferenceField`.
 
 Uniqueness constraints
 ----------------------
 MongoEngine allows you to specify that a field should be unique across a
-collection by providing ``unique=True`` to a :class:`~mongoengine.Field`\ 's
+collection by providing ``unique=True`` to a :class:`~mongoengine.fields.Field`\ 's
 constructor. If you try to save a document that has the same value for a unique
 field as a document that is already in the database, a
-:class:`~mongoengine.OperationError` will be raised. You may also specify
+:class:`~mongoengine.NotUniqueError` will be raised. You may also specify
 multi-field uniqueness constraints by using :attr:`unique_with`, which may be
 either a single field name, or a list or tuple of field names::
 
@@ -394,7 +413,7 @@ either a single field name, or a list or tuple of field names::
 Skipping Document validation on save
 ------------------------------------
 You can also skip the whole document validation process by setting
-``validate=False`` when caling the :meth:`~mongoengine.document.Document.save`
+``validate=False`` when calling the :meth:`~mongoengine.document.Document.save`
 method::
 
     class Recipient(Document):
@@ -409,7 +428,7 @@ Document collections
 ====================
 Document classes that inherit **directly** from :class:`~mongoengine.Document`
 will have their own **collection** in the database. The name of the collection
-is by default the name of the class, coverted to lowercase (so in the example
+is by default the name of the class, converted to lowercase (so in the example
 above, the collection would be called `page`). If you need to change the name
 of the collection (e.g. to use MongoEngine with an existing database), then
 create a class dictionary attribute called :attr:`meta` on your document, and
@@ -426,8 +445,10 @@ A :class:`~mongoengine.Document` may use a **Capped Collection** by specifying
 :attr:`max_documents` and :attr:`max_size` in the :attr:`meta` dictionary.
 :attr:`max_documents` is the maximum number of documents that is allowed to be
 stored in the collection, and :attr:`max_size` is the maximum size of the
-collection in bytes. If :attr:`max_size` is not specified and
+collection in bytes. :attr:`max_size` is rounded up to the next multiple of 256
-:attr:`max_documents` is, :attr:`max_size` defaults to 10000000 bytes (10MB).
+by MongoDB internally and mongoengine before. Use also a multiple of 256 to
+avoid confusions. If :attr:`max_size` is not specified and
+:attr:`max_documents` is, :attr:`max_size` defaults to 10485760 bytes (10MB).
 The following example shows a :class:`Log` document that will be limited to
 1000 entries and 2MB of disk space::
 
@@ -435,21 +456,40 @@ The following example shows a :class:`Log` document that will be limited to
         ip_address = StringField()
         meta = {'max_documents': 1000, 'max_size': 2000000}
 
+.. defining-indexes_
+
 Indexes
 =======
+
 You can specify indexes on collections to make querying faster. This is done
 by creating a list of index specifications called :attr:`indexes` in the
 :attr:`~mongoengine.Document.meta` dictionary, where an index specification may
 either be a single field name, a tuple containing multiple field names, or a
-dictionary containing a full index definition. A direction may be specified on
+dictionary containing a full index definition.
-fields by prefixing the field name with a **+** or a **-** sign. Note that
+
-direction only matters on multi-field indexes. ::
+A direction may be specified on fields by prefixing the field name with a
+**+** (for ascending) or a **-** sign (for descending). Note that direction
+only matters on multi-field indexes. Text indexes may be specified by prefixing
+the field name with a **$**. Hashed indexes may be specified by prefixing
+the field name with a **#**::
 
     class Page(Document):
+        category = IntField()
         title = StringField()
         rating = StringField()
+        created = DateTimeField()
         meta = {
-            'indexes': ['title', ('title', '-rating')]
+            'indexes': [
+                'title',
+                '$title',  # text index
+                '#title',  # hashed index
+                ('title', '-rating'),
+                ('category', '_cls'),
+                {
+                    'fields': ['created'],
+                    'expireAfterSeconds': 3600
+                }
+            ]
         }
 
 If a dictionary is passed then the following options are available:
@@ -457,36 +497,116 @@ If a dictionary is passed then the following options are available:
 :attr:`fields` (Default: None)
     The fields to index. Specified in the same format as described above.
 
-:attr:`types` (Default: True)
+:attr:`cls` (Default: True)
-    Whether the index should have the :attr:`_types` field added automatically
+    If you have polymorphic models that inherit and have
-    to the start of the index.
+    :attr:`allow_inheritance` turned on, you can configure whether the index
+    should have the :attr:`_cls` field added automatically to the start of the
+    index.
 
 :attr:`sparse` (Default: False)
     Whether the index should be sparse.
 
 :attr:`unique` (Default: False)
-    Whether the index should be sparse.
+    Whether the index should be unique.
+
+:attr:`expireAfterSeconds` (Optional)
+    Allows you to automatically expire data from a collection by setting the
+    time in seconds to expire the a field.
 
 .. note::
 
-    To index embedded files / dictionary fields use 'dot' notation eg:
+    Inheritance adds extra fields indices see: :ref:`document-inheritance`.
-    `rank.title`
 
-.. warning::
+Global index default options
+----------------------------
 
-    Inheritance adds extra indices.
+There are a few top level defaults for all indexes that can be set::
-    If don't need inheritance for a document turn inheritance off -
-    see :ref:`document-inheritance`.
 
+    class Page(Document):
+        title = StringField()
+        rating = StringField()
+        meta = {
+            'index_options': {},
+            'index_background': True,
+            'index_cls': False,
+            'auto_create_index': True,
+            'index_drop_dups': True,
+        }
+
+
+:attr:`index_options` (Optional)
+    Set any default index options - see the `full options list <http://docs.mongodb.org/manual/reference/method/db.collection.ensureIndex/#db.collection.ensureIndex>`_
+
+:attr:`index_background` (Optional)
+    Set the default value for if an index should be indexed in the background
+
+:attr:`index_cls` (Optional)
+    A way to turn off a specific index for _cls.
+
+:attr:`auto_create_index` (Optional)
+    When this is True (default), MongoEngine will ensure that the correct
+    indexes exist in MongoDB each time a command is run. This can be disabled
+    in systems where indexes are managed separately. Disabling this will improve
+    performance.
+
+:attr:`index_drop_dups` (Optional)
+    Set the default value for if an index should drop duplicates
+
+.. note:: Since MongoDB 3.0 drop_dups is not supported anymore. Raises a Warning
+    and has no effect
+
+
+Compound Indexes and Indexing sub documents
+-------------------------------------------
+
+Compound indexes can be created by adding the Embedded field or dictionary
+field name to the index definition.
+
+Sometimes its more efficient to index parts of Embedded / dictionary fields,
+in this case use 'dot' notation to identify the value to index eg: `rank.title`
+
+.. _geospatial-indexes:
 
 Geospatial indexes
----------------------------
+------------------
+
+The best geo index for mongodb is the new "2dsphere", which has an improved
+spherical model and provides better performance and more options when querying.
+The following fields will explicitly add a "2dsphere" index:
+
+    - :class:`~mongoengine.fields.PointField`
+    - :class:`~mongoengine.fields.LineStringField`
+    - :class:`~mongoengine.fields.PolygonField`
+    - :class:`~mongoengine.fields.MultiPointField`
+    - :class:`~mongoengine.fields.MultiLineStringField`
+    - :class:`~mongoengine.fields.MultiPolygonField`
+
+As "2dsphere" indexes can be part of a compound index, you may not want the
+automatic index but would prefer a compound index.  In this example we turn off
+auto indexing and explicitly declare a compound index on ``location`` and ``datetime``::
+
+    class Log(Document):
+        location = PointField(auto_index=False)
+        datetime = DateTimeField()
+
+        meta = {
+            'indexes': [[("location", "2dsphere"), ("datetime", 1)]]
+        }
+
+
+Pre MongoDB 2.4 Geo
+'''''''''''''''''''
+
+.. note:: For MongoDB < 2.4 this is still current, however the new 2dsphere
+    index is a big improvement over the previous 2D model - so upgrading is
+    advised.
+
 Geospatial indexes will be automatically created for all
-:class:`~mongoengine.GeoPointField`\ s
+:class:`~mongoengine.fields.GeoPointField`\ s
 
 It is also possible to explicitly define geospatial indexes. This is
 useful if you need to define a geospatial index on a subfield of a
-:class:`~mongoengine.DictField` or a custom field that contains a
+:class:`~mongoengine.fields.DictField` or a custom field that contains a
 point. To create a geospatial index you must prefix the field with the
 ***** sign. ::
 
@@ -498,6 +618,35 @@ point. To create a geospatial index you must prefix the field with the
             ],
         }
 
+Time To Live indexes
+--------------------
+
+A special index type that allows you to automatically expire data from a
+collection after a given period. See the official
+`ttl <http://docs.mongodb.org/manual/tutorial/expire-data/#expire-data-from-collections-by-setting-ttl>`_
+documentation for more information.  A common usecase might be session data::
+
+    class Session(Document):
+        created = DateTimeField(default=datetime.utcnow)
+        meta = {
+            'indexes': [
+                {'fields': ['created'], 'expireAfterSeconds': 3600}
+            ]
+        }
+
+.. warning:: TTL indexes happen on the MongoDB server and not in the application
+    code, therefore no signals will be fired on document deletion.
+    If you need signals to be fired on deletion, then you must handle the
+    deletion of Documents in your application code.
+
+Comparing Indexes
+-----------------
+
+Use :func:`mongoengine.Document.compare_indexes` to compare actual indexes in
+the database to those that your document definitions define.  This is useful
+for maintenance purposes and ensuring you have the correct indexes for your
+schema.
+
 Ordering
 ========
 A default ordering can be specified for your
@@ -542,11 +691,11 @@ Shard keys
 ==========
 
 If your collection is sharded, then you need to specify the shard key as a tuple,
-using the :attr:`shard_key` attribute of :attr:`-mongoengine.Document.meta`.
+using the :attr:`shard_key` attribute of :attr:`~mongoengine.Document.meta`.
 This ensures that the shard key is sent with the query when calling the
 :meth:`~mongoengine.document.Document.save` or
 :meth:`~mongoengine.document.Document.update` method on an existing
-:class:`-mongoengine.Document` instance::
+:class:`~mongoengine.Document` instance::
 
     class LogEntry(Document):
         machine = StringField()
@@ -568,7 +717,9 @@ defined, you may subclass it and add any extra fields or methods you may need.
 As this is new class is not a direct subclass of
 :class:`~mongoengine.Document`, it will not be stored in its own collection; it
 will use the same collection as its superclass uses. This allows for more
-convenient and efficient retrieval of related documents::
+convenient and efficient retrieval of related documents -- all you need do is
+set :attr:`allow_inheritance` to True in the :attr:`meta` data for a
+document.::
 
     # Stored in a collection named 'page'
     class Page(Document):
@@ -580,25 +731,47 @@ convenient and efficient retrieval of related documents::
     class DatedPage(Page):
         date = DateTimeField()
 
-.. note:: From 0.7 onwards you must declare `allow_inheritance` in the document meta.
+.. note:: From 0.8 onwards :attr:`allow_inheritance` defaults
-
+          to False, meaning you must set it to True to use inheritance.
 
 Working with existing data
 --------------------------
-To enable correct retrieval of documents involved in this kind of heirarchy,
+As MongoEngine no longer defaults to needing :attr:`_cls`, you can quickly and
-two extra attributes are stored on each document in the database: :attr:`_cls`
+easily get working with existing data.  Just define the document to match
-and :attr:`_types`. These are hidden from the user through the MongoEngine
+the expected schema in your database ::
-interface, but may not be present if you are trying to use MongoEngine with
-an existing database. For this reason, you may disable this inheritance
-mechansim, removing the dependency of :attr:`_cls` and :attr:`_types`, enabling
-you to work with existing databases. To disable inheritance on a document
-class, set :attr:`allow_inheritance` to ``False`` in the :attr:`meta`
-dictionary::
 
     # Will work with data in an existing collection named 'cmsPage'
     class Page(Document):
         title = StringField(max_length=200, required=True)
         meta = {
-            'collection': 'cmsPage',
+            'collection': 'cmsPage'
-            'allow_inheritance': False,
         }
+
+If you have wildly varying schemas then using a
+:class:`~mongoengine.DynamicDocument` might be more appropriate, instead of
+defining all possible field types.
+
+If you use :class:`~mongoengine.Document` and the database contains data that
+isn't defined then that data will be stored in the `document._data` dictionary.
+
+Abstract classes
+================
+
+If you want to add some extra functionality to a group of Document classes but
+you don't need or want the overhead of inheritance you can use the
+:attr:`abstract` attribute of :attr:`~mongoengine.Document.meta`.
+This won't turn on :ref:`document-inheritance` but will allow you to keep your
+code DRY::
+
+        class BaseDocument(Document):
+            meta = {
+                'abstract': True,
+            }
+            def check_permissions(self):
+                ...
+
+        class User(BaseDocument):
+           ...
+
+Now the User class will have access to the inherited `check_permissions` method
+and won't store any of the extra `_cls` information.

docs/guide/document-instances.rst

@@ -2,7 +2,7 @@
 Documents instances
 ===================
 To create a new document object, create an instance of the relevant document
-class, providing values for its fields as its constructor keyword arguments.
+class, providing values for its fields as constructor keyword arguments.
 You may provide values for any of the fields on the document::
 
     >>> page = Page(title="Test Page")
@@ -30,21 +30,53 @@ already exist, then any changes will be updated atomically.  For example::
 
 .. note::
 
-    Changes to documents are tracked and on the whole perform `set` operations.
+    Changes to documents are tracked and on the whole perform ``set`` operations.
 
-    * ``list_field.pop(0)`` - *sets* the resulting list
+    * ``list_field.push(0)`` --- *sets* the resulting list
-    * ``del(list_field)``   - *unsets* whole list
+    * ``del(list_field)``   --- *unsets* whole list
+
+    With lists its preferable to use ``Doc.update(push__list_field=0)`` as
+    this stops the whole list being updated --- stopping any race conditions.
 
 .. seealso::
     :ref:`guide-atomic-updates`
 
+Pre save data validation and cleaning
+-------------------------------------
+MongoEngine allows you to create custom cleaning rules for your documents when
+calling :meth:`~mongoengine.Document.save`.  By providing a custom
+:meth:`~mongoengine.Document.clean` method you can do any pre validation / data
+cleaning.
+
+This might be useful if you want to ensure a default value based on other
+document values for example::
+
+    class Essay(Document):
+        status = StringField(choices=('Published', 'Draft'), required=True)
+        pub_date = DateTimeField()
+
+        def clean(self):
+            """Ensures that only published essays have a `pub_date` and
+            automatically sets the pub_date if published and not set"""
+            if self.status == 'Draft' and self.pub_date is not None:
+                msg = 'Draft entries should not have a publication date.'
+                raise ValidationError(msg)
+            # Set the pub_date for published items if not set.
+            if self.status == 'Published' and self.pub_date is None:
+                self.pub_date = datetime.now()
+
+.. note::
+    Cleaning is only called if validation is turned on and when calling
+    :meth:`~mongoengine.Document.save`.
+
 Cascading Saves
 ---------------
-If your document contains :class:`~mongoengine.ReferenceField` or
+If your document contains :class:`~mongoengine.fields.ReferenceField` or
-:class:`~mongoengine.GenericReferenceField` objects, then by default the
+:class:`~mongoengine.fields.GenericReferenceField` objects, then by default the
-:meth:`~mongoengine.Document.save` method will automatically save any changes to
+:meth:`~mongoengine.Document.save` method will not save any changes to
-those objects as well.  If this is not desired passing :attr:`cascade` as False
+those objects.  If you want all references to be saved also, noting each
-to the save method turns this feature off.
+save is a separate query, then passing :attr:`cascade` as True
+to the save method will cascade any saves.
 
 Deleting documents
 ------------------
@@ -81,12 +113,13 @@ you may still use :attr:`id` to access the primary key if you want::
     >>> bob.id == bob.email == 'bob@example.com'
     True
 
-You can also access the document's "primary key" using the :attr:`pk` field; in
+You can also access the document's "primary key" using the :attr:`pk` field,
-is an alias to :attr:`id`::
+it's an alias to :attr:`id`::
 
     >>> page = Page(title="Another Test Page")
     >>> page.save()
     >>> page.id == page.pk
+    True
 
 .. note::
 

docs/guide/gridfs.rst

@@ -7,7 +7,7 @@ GridFS
 Writing
 -------
 
-GridFS support comes in the form of the :class:`~mongoengine.FileField` field
+GridFS support comes in the form of the :class:`~mongoengine.fields.FileField` field
 object. This field acts as a file-like object and provides a couple of
 different ways of inserting and retrieving data. Arbitrary metadata such as
 content type can also be stored alongside the files. In the following example,
@@ -18,26 +18,16 @@ a document is created to store details about animals, including a photo::
         family = StringField()
         photo = FileField()
 
-    marmot = Animal('Marmota', 'Sciuridae')
+    marmot = Animal(genus='Marmota', family='Sciuridae')
-
-    marmot_photo = open('marmot.jpg', 'r')      # Retrieve a photo from disk
-    marmot.photo = marmot_photo                 # Store photo in the document
-    marmot.photo.content_type = 'image/jpeg'    # Store metadata
-
-    marmot.save()
-
-Another way of writing to a :class:`~mongoengine.FileField` is to use the
-:func:`put` method. This allows for metadata to be stored in the same call as
-the file::
 
+    marmot_photo = open('marmot.jpg', 'rb')
     marmot.photo.put(marmot_photo, content_type = 'image/jpeg')
-
     marmot.save()
 
 Retrieval
 ---------
 
-So using the :class:`~mongoengine.FileField` is just like using any other
+So using the :class:`~mongoengine.fields.FileField` is just like using any other
 field. The file can also be retrieved just as easily::
 
     marmot = Animal.objects(genus='Marmota').first()
@@ -47,7 +37,7 @@ field. The file can also be retrieved just as easily::
 Streaming
 ---------
 
-Streaming data into a :class:`~mongoengine.FileField` is achieved in a
+Streaming data into a :class:`~mongoengine.fields.FileField` is achieved in a
 slightly different manner.  First, a new file must be created by calling the
 :func:`new_file` method. Data can then be written using :func:`write`::
 
@@ -56,7 +46,7 @@ slightly different manner.  First, a new file must be created by calling the
     marmot.photo.write('some_more_image_data')
     marmot.photo.close()
 
-    marmot.photo.save()
+    marmot.save()
 
 Deletion
 --------
@@ -80,5 +70,5 @@ Replacing files
 Files can be replaced with the :func:`replace` method. This works just like
 the :func:`put` method so even metadata can (and should) be replaced::
 
-    another_marmot = open('another_marmot.png', 'r')
+    another_marmot = open('another_marmot.png', 'rb')
     marmot.photo.replace(another_marmot, content_type='image/png')

docs/guide/index.rst

@@ -12,3 +12,5 @@ User Guide
    querying
    gridfs
    signals
+   text-indexes
+   mongomock

docs/guide/installing.rst

@@ -2,13 +2,13 @@
 Installing MongoEngine
 ======================
 
-To use MongoEngine, you will need to download `MongoDB <http://mongodb.org/>`_
+To use MongoEngine, you will need to download `MongoDB <http://mongodb.com/>`_
 and ensure it is running in an accessible location. You will also need
 `PyMongo <http://api.mongodb.org/python>`_ to use MongoEngine, but if you
 install MongoEngine using setuptools, then the dependencies will be handled for
 you.
 
-MongoEngine is available on PyPI, so to use it you can use :program:`pip`:
+MongoEngine is available on PyPI, so you can use :program:`pip`:
 
 .. code-block:: console
 
@@ -22,10 +22,10 @@ Alternatively, if you don't have setuptools installed, `download it from PyPi
     $ python setup.py install
 
 To use the bleeding-edge version of MongoEngine, you can get the source from
-`GitHub <http://github.com/hmarr/mongoengine/>`_ and install it as above:
+`GitHub <http://github.com/mongoengine/mongoengine/>`_ and install it as above:
 
 .. code-block:: console
 
-    $ git clone git://github.com/hmarr/mongoengine
+    $ git clone git://github.com/mongoengine/mongoengine
     $ cd mongoengine
     $ python setup.py install

docs/guide/mongomock.rst

@@ -0,0 +1,21 @@
+==============================
+Use mongomock for testing
+==============================
+
+`mongomock <https://github.com/vmalloc/mongomock/>`_ is a package to do just 
+what the name implies, mocking a mongo database.
+
+To use with mongoengine, simply specify mongomock when connecting with 
+mongoengine:
+
+.. code-block:: python
+
+    connect('mongoenginetest', host='mongomock://localhost')
+    conn = get_connection()
+
+or with an alias:
+
+.. code-block:: python
+
+    connect('mongoenginetest', host='mongomock://localhost', alias='testdb')
+    conn = get_connection('testdb')

docs/guide/querying.rst

@@ -15,11 +15,10 @@ fetch documents from the database::
 
 .. note::
 
-   Once the iteration finishes (when :class:`StopIteration` is raised),
+    As of MongoEngine 0.8 the querysets utilise a local cache.  So iterating
-   :meth:`~mongoengine.queryset.QuerySet.rewind` will be called so that the
+    it multiple times will only cause a single query.  If this is not the
-   :class:`~mongoengine.queryset.QuerySet` may be iterated over again. The
+    desired behaviour you can call :class:`~mongoengine.QuerySet.no_cache`
-   results of the first iteration are *not* cached, so the database will be hit
+    (version **0.8.3+**) to return a non-caching queryset.
-   each time the :class:`~mongoengine.queryset.QuerySet` is iterated over.
 
 Filtering queries
 =================
@@ -40,10 +39,18 @@ syntax::
     # been written by a user whose 'country' field is set to 'uk'
     uk_pages = Page.objects(author__country='uk')
 
+.. note::
+
+   (version **0.9.1+**) if your field name is like mongodb operator name (for example
+   type, lte, lt...) and you want to place it at the end of lookup keyword
+   mongoengine automatically  prepend $ to it. To avoid this use  __ at the end of
+   your lookup keyword. For example if your field name is ``type`` and you want to
+   query by this field you must use ``.objects(user__type__="admin")`` instead of
+   ``.objects(user__type="admin")``
 
 Query operators
 ===============
-Operators other than equality may also be used in queries; just attach the
+Operators other than equality may also be used in queries --- just attach the
 operator name to a key with a double-underscore::
 
     # Only find users whose age is 18 or less
@@ -65,6 +72,9 @@ Available operators are as follows:
 * ``size`` -- the size of the array is
 * ``exists`` -- value for field exists
 
+String queries
+--------------
+
 The following operators are available as shortcuts to querying with regular
 expressions:
 
@@ -78,12 +88,75 @@ expressions:
 * ``iendswith`` -- string field ends with value (case insensitive)
 * ``match``  -- performs an $elemMatch so you can match an entire document within an array
 
-There are a few special operators for performing geographical queries, that
+
-may used with :class:`~mongoengine.GeoPointField`\ s:
+Geo queries
+-----------
+
+There are a few special operators for performing geographical queries.
+The following were added in MongoEngine 0.8 for
+:class:`~mongoengine.fields.PointField`,
+:class:`~mongoengine.fields.LineStringField` and
+:class:`~mongoengine.fields.PolygonField`:
+
+* ``geo_within`` -- check if a geometry is within a polygon. For ease of use
+  it accepts either a geojson geometry or just the polygon coordinates eg::
+
+        loc.objects(point__geo_within=[[[40, 5], [40, 6], [41, 6], [40, 5]]])
+        loc.objects(point__geo_within={"type": "Polygon",
+                                 "coordinates": [[[40, 5], [40, 6], [41, 6], [40, 5]]]})
+
+* ``geo_within_box`` -- simplified geo_within searching with a box eg::
+
+        loc.objects(point__geo_within_box=[(-125.0, 35.0), (-100.0, 40.0)])
+        loc.objects(point__geo_within_box=[<bottom left coordinates>, <upper right coordinates>])
+
+* ``geo_within_polygon`` -- simplified geo_within searching within a simple polygon eg::
+
+        loc.objects(point__geo_within_polygon=[[40, 5], [40, 6], [41, 6], [40, 5]])
+        loc.objects(point__geo_within_polygon=[ [ <x1> , <y1> ] ,
+                                                [ <x2> , <y2> ] ,
+                                                [ <x3> , <y3> ] ])
+
+* ``geo_within_center`` -- simplified geo_within the flat circle radius of a point eg::
+
+        loc.objects(point__geo_within_center=[(-125.0, 35.0), 1])
+        loc.objects(point__geo_within_center=[ [ <x>, <y> ] , <radius> ])
+
+* ``geo_within_sphere`` -- simplified geo_within the spherical circle radius of a point eg::
+
+        loc.objects(point__geo_within_sphere=[(-125.0, 35.0), 1])
+        loc.objects(point__geo_within_sphere=[ [ <x>, <y> ] , <radius> ])
+
+* ``geo_intersects`` -- selects all locations that intersect with a geometry eg::
+
+        # Inferred from provided points lists:
+        loc.objects(poly__geo_intersects=[40, 6])
+        loc.objects(poly__geo_intersects=[[40, 5], [40, 6]])
+        loc.objects(poly__geo_intersects=[[[40, 5], [40, 6], [41, 6], [41, 5], [40, 5]]])
+
+        # With geoJson style objects
+        loc.objects(poly__geo_intersects={"type": "Point", "coordinates": [40, 6]})
+        loc.objects(poly__geo_intersects={"type": "LineString",
+                                          "coordinates": [[40, 5], [40, 6]]})
+        loc.objects(poly__geo_intersects={"type": "Polygon",
+                                          "coordinates": [[[40, 5], [40, 6], [41, 6], [41, 5], [40, 5]]]})
+
+* ``near`` -- find all the locations near a given point::
+
+        loc.objects(point__near=[40, 5])
+        loc.objects(point__near={"type": "Point", "coordinates": [40, 5]})
+
+  You can also set the maximum and/or the minimum distance in meters as well::
+
+        loc.objects(point__near=[40, 5], point__max_distance=1000)
+        loc.objects(point__near=[40, 5], point__min_distance=100)
+
+The older 2D indexes are still supported with the
+:class:`~mongoengine.fields.GeoPointField`:
 
 * ``within_distance`` -- provide a list containing a point and a maximum
   distance (e.g. [(41.342, -87.653), 5])
-* ``within_spherical_distance`` -- Same as above but using the spherical geo model
+* ``within_spherical_distance`` -- same as above but using the spherical geo model
   (e.g. [(41.342, -87.653), 5/earth_radius])
 * ``near`` -- order the documents by how close they are to a given point
 * ``near_sphere`` -- Same as above but using the spherical geo model
@@ -91,14 +164,19 @@ may used with :class:`~mongoengine.GeoPointField`\ s:
   [(35.0, -125.0), (40.0, -100.0)])
 * ``within_polygon`` -- filter documents to those within a given polygon (e.g.
   [(41.91,-87.69), (41.92,-87.68), (41.91,-87.65), (41.89,-87.65)]).
+
   .. note:: Requires Mongo Server 2.0
 
+* ``max_distance`` -- can be added to your location queries to set a maximum
+  distance.
+* ``min_distance`` -- can be added to your location queries to set a minimum
+  distance.
 
 Querying lists
 --------------
 On most fields, this syntax will look up documents where the field specified
 matches the given value exactly, but when the field refers to a
-:class:`~mongoengine.ListField`, a single item may be provided, in which case
+:class:`~mongoengine.fields.ListField`, a single item may be provided, in which case
 lists that contain that item will be matched::
 
     class Page(Document):
@@ -129,12 +207,14 @@ However, this doesn't map well to the syntax so you can also use a capital S ins
 
     Post.objects(comments__by="joe").update(inc__comments__S__votes=1)
 
-    .. note:: Due to Mongo currently the $ operator only applies to the first matched item in the query.
+.. note::
+    Due to :program:`Mongo`, currently the $ operator only applies to the
+    first matched item in the query.
 
 
 Raw queries
 -----------
-It is possible to provide a raw PyMongo query as a query parameter, which will
+It is possible to provide a raw :mod:`PyMongo` query as a query parameter, which will
 be integrated directly into the query. This is done using the ``__raw__``
 keyword argument::
 
@@ -144,12 +224,12 @@ keyword argument::
 
 Limiting and skipping results
 =============================
-Just as with traditional ORMs, you may limit the number of results returned, or
+Just as with traditional ORMs, you may limit the number of results returned or
 skip a number or results in you query.
 :meth:`~mongoengine.queryset.QuerySet.limit` and
 :meth:`~mongoengine.queryset.QuerySet.skip` and methods are available on
-:class:`~mongoengine.queryset.QuerySet` objects, but the prefered syntax for
+:class:`~mongoengine.queryset.QuerySet` objects, but the `array-slicing` syntax
-achieving this is using array-slicing syntax::
+is preferred for achieving this::
 
     # Only the first 5 people
     users = User.objects[:5]
@@ -157,7 +237,7 @@ achieving this is using array-slicing syntax::
     # All except for the first 5 people
     users = User.objects[5:]
 
-    # 5 users, starting from the 10th user found
+    # 5 users, starting from the 11th user found
     users = User.objects[10:15]
 
 You may also index the query to retrieve a single result. If an item at that
@@ -179,25 +259,21 @@ Retrieving unique results
 -------------------------
 To retrieve a result that should be unique in the collection, use
 :meth:`~mongoengine.queryset.QuerySet.get`. This will raise
-:class:`~mongoengine.queryset.DoesNotExist` if no document matches the query,
+:class:`~mongoengine.queryset.DoesNotExist` if
-and :class:`~mongoengine.queryset.MultipleObjectsReturned` if more than one
+no document matches the query, and
-document matched the query.
+:class:`~mongoengine.queryset.MultipleObjectsReturned`
+if more than one document matched the query.  These exceptions are merged into
+your document definitions eg: `MyDoc.DoesNotExist`
 
-A variation of this method exists,
+A variation of this method, get_or_create() existed, but it was unsafe. It
-:meth:`~mongoengine.queryset.Queryset.get_or_create`, that will create a new
+could not be made safe, because there are no transactions in mongoDB. Other
-document with the query arguments if no documents match the query. An
+approaches should be investigated, to ensure you don't accidentally duplicate
-additional keyword argument, :attr:`defaults` may be provided, which will be
+data when using something similar to this method. Therefore it was deprecated
-used as default values for the new document, in the case that it should need
+in 0.8 and removed in 0.10.
-to be created::
-
-    >>> a, created = User.objects.get_or_create(name='User A', defaults={'age': 30})
-    >>> b, created = User.objects.get_or_create(name='User A', defaults={'age': 40})
-    >>> a.name == b.name and a.age == b.age
-    True
 
 Default Document queries
 ========================
-By default, the objects :attr:`~mongoengine.Document.objects` attribute on a
+By default, the objects :attr:`~Document.objects` attribute on a
 document returns a :class:`~mongoengine.queryset.QuerySet` that doesn't filter
 the collection -- it returns all objects. This may be changed by defining a
 method on a document that modifies a queryset. The method should accept two
@@ -240,7 +316,7 @@ Should you want to add custom methods for interacting with or filtering
 documents, extending the :class:`~mongoengine.queryset.QuerySet` class may be
 the way to go. To use a custom :class:`~mongoengine.queryset.QuerySet` class on
 a document, set ``queryset_class`` to the custom class in a
-:class:`~mongoengine.Document`\ s ``meta`` dictionary::
+:class:`~mongoengine.Document`'s ``meta`` dictionary::
 
     class AwesomerQuerySet(QuerySet):
 
@@ -264,12 +340,19 @@ Javascript code that is executed on the database server.
 
 Counting results
 ----------------
-Just as with limiting and skipping results, there is a method on
+Just as with limiting and skipping results, there is a method on a
-:class:`~mongoengine.queryset.QuerySet` objects --
+:class:`~mongoengine.queryset.QuerySet` object --
-:meth:`~mongoengine.queryset.QuerySet.count`, but there is also a more Pythonic
+:meth:`~mongoengine.queryset.QuerySet.count`::
-way of achieving this::
 
-    num_users = len(User.objects)
+    num_users = User.objects.count()
+
+You could technically use ``len(User.objects)`` to get the same result, but it
+would be significantly slower than :meth:`~mongoengine.queryset.QuerySet.count`.
+When you execute a server-side count query, you let MongoDB do the heavy
+lifting and you receive a single integer over the wire. Meanwhile, len()
+retrieves all the results, places them in a local cache, and finally counts
+them. If we compare the performance of the two operations, len() is much slower
+than :meth:`~mongoengine.queryset.QuerySet.count`.
 
 Further aggregation
 -------------------
@@ -315,7 +398,7 @@ Retrieving a subset of fields
 Sometimes a subset of fields on a :class:`~mongoengine.Document` is required,
 and for efficiency only these should be retrieved from the database. This issue
 is especially important for MongoDB, as fields may often be extremely large
-(e.g. a :class:`~mongoengine.ListField` of
+(e.g. a :class:`~mongoengine.fields.ListField` of
 :class:`~mongoengine.EmbeddedDocument`\ s, which represent the comments on a
 blog post. To select only a subset of fields, use
 :meth:`~mongoengine.queryset.QuerySet.only`, specifying the fields you want to
@@ -347,14 +430,14 @@ If you later need the missing fields, just call
 Getting related data
 --------------------
 
-When iterating the results of :class:`~mongoengine.ListField` or
+When iterating the results of :class:`~mongoengine.fields.ListField` or
-:class:`~mongoengine.DictField` we automatically dereference any
+:class:`~mongoengine.fields.DictField` we automatically dereference any
 :class:`~pymongo.dbref.DBRef` objects as efficiently as possible, reducing the
 number the queries to mongo.
 
 There are times when that efficiency is not enough, documents that have
-:class:`~mongoengine.ReferenceField` objects or
+:class:`~mongoengine.fields.ReferenceField` objects or
-:class:`~mongoengine.GenericReferenceField` objects at the top level are
+:class:`~mongoengine.fields.GenericReferenceField` objects at the top level are
 expensive as the number of queries to MongoDB can quickly rise.
 
 To limit the number of queries use
@@ -365,8 +448,30 @@ references to the depth of 1 level.  If you have more complicated documents and
 want to dereference more of the object at once then increasing the :attr:`max_depth`
 will dereference more levels of the document.
 
+Turning off dereferencing
+-------------------------
+
+Sometimes for performance reasons you don't want to automatically dereference
+data. To turn off dereferencing of the results of a query use
+:func:`~mongoengine.queryset.QuerySet.no_dereference` on the queryset like so::
+
+    post = Post.objects.no_dereference().first()
+    assert(isinstance(post.author, ObjectId))
+
+You can also turn off all dereferencing for a fixed period by using the
+:class:`~mongoengine.context_managers.no_dereference` context manager::
+
+    with no_dereference(Post) as Post:
+        post = Post.objects.first()
+        assert(isinstance(post.author, ObjectId))
+
+    # Outside the context manager dereferencing occurs.
+    assert(isinstance(post.author, User))
+
+
 Advanced queries
 ================
+
 Sometimes calling a :class:`~mongoengine.queryset.QuerySet` object with keyword
 arguments can't fully express the query you want to use -- for example if you
 need to combine a number of constraints using *and* and *or*. This is made
@@ -379,34 +484,46 @@ operators. To use a :class:`~mongoengine.queryset.Q` object, pass it in as the
 first positional argument to :attr:`Document.objects` when you filter it by
 calling it with keyword arguments::
 
+    from mongoengine.queryset.visitor import Q
+
     # Get published posts
     Post.objects(Q(published=True) | Q(publish_date__lte=datetime.now()))
 
     # Get top posts
     Post.objects((Q(featured=True) & Q(hits__gte=1000)) | Q(hits__gte=5000))
 
+.. warning:: You have to use bitwise operators.  You cannot use ``or``, ``and``
+    to combine queries as ``Q(a=a) or Q(b=b)`` is not the same as
+    ``Q(a=a) | Q(b=b)``. As ``Q(a=a)`` equates to true ``Q(a=a) or Q(b=b)`` is
+    the same as ``Q(a=a)``.
+
 .. _guide-atomic-updates:
 
 Atomic updates
 ==============
 Documents may be updated atomically by using the
-:meth:`~mongoengine.queryset.QuerySet.update_one` and
+:meth:`~mongoengine.queryset.QuerySet.update_one`,
-:meth:`~mongoengine.queryset.QuerySet.update` methods on a
+:meth:`~mongoengine.queryset.QuerySet.update` and
-:meth:`~mongoengine.queryset.QuerySet`. There are several different "modifiers"
+:meth:`~mongoengine.queryset.QuerySet.modify` methods on a
-that you may use with these methods:
+:class:`~mongoengine.queryset.QuerySet` or
+:meth:`~mongoengine.Document.modify` and
+:meth:`~mongoengine.Document.save` (with :attr:`save_condition` argument) on a
+:class:`~mongoengine.Document`.
+There are several different "modifiers" that you may use with these methods:
 
 * ``set`` -- set a particular value
-* ``unset`` -- delete a particular value (since MongoDB v1.3+)
+* ``unset`` -- delete a particular value (since MongoDB v1.3)
 * ``inc`` -- increment a value by a given amount
 * ``dec`` -- decrement a value by a given amount
-* ``pop`` -- remove the last item from a list
 * ``push`` -- append a value to a list
 * ``push_all`` -- append several values to a list
-* ``pop`` -- remove the first or last element of a list
+* ``pop`` -- remove the first or last element of a list `depending on the value`_
 * ``pull`` -- remove a value from a list
 * ``pull_all`` -- remove several values from a list
 * ``add_to_set`` -- add value to a list only if its not in the list already
 
+.. _depending on the value: http://docs.mongodb.org/manual/reference/operator/update/pop/
+
 The syntax for atomic updates is similar to the querying syntax, but the
 modifier comes before the field, not after it::
 
@@ -425,6 +542,13 @@ modifier comes before the field, not after it::
     >>> post.tags
     ['database', 'nosql']
 
+.. note::
+
+    If no modifier operator is specified the default will be ``$set``. So the following sentences are identical::
+
+        >>> BlogPost.objects(id=post.id).update(title='Example Post')
+        >>> BlogPost.objects(id=post.id).update(set__title='Example Post')
+
 .. note::
 
     In version 0.5 the :meth:`~mongoengine.Document.save` runs atomic updates
@@ -441,6 +565,15 @@ cannot use the `$` syntax in keyword arguments it has been mapped to `S`::
     >>> post.tags
     ['database', 'mongodb']
 
+From MongoDB version 2.6, push operator supports $position value which allows
+to push values with index.
+    >>> post = BlogPost(title="Test", tags=["mongo"])
+    >>> post.save()
+    >>> post.update(push__tags__0=["database", "code"])
+    >>> post.reload()
+    >>> post.tags
+    ['database', 'code', 'mongo']
+
 .. note::
     Currently only top level lists are handled, future versions of mongodb /
     pymongo plan to support nested positional operators.  See `The $ positional
@@ -483,7 +616,7 @@ Some variables are made available in the scope of the Javascript function:
 
 The following example demonstrates the intended usage of
 :meth:`~mongoengine.queryset.QuerySet.exec_js` by defining a function that sums
-over a field on a document (this functionality is already available throught
+over a field on a document (this functionality is already available through
 :meth:`~mongoengine.queryset.QuerySet.sum` but is shown here for sake of
 example)::
 
@@ -510,7 +643,7 @@ Javascript code. When accessing a field on a collection object, use
 square-bracket notation, and prefix the MongoEngine field name with a tilde.
 The field name that follows the tilde will be translated to the name used in
 the database. Note that when referring to fields on embedded documents,
-the name of the :class:`~mongoengine.EmbeddedDocumentField`, followed by a dot,
+the name of the :class:`~mongoengine.fields.EmbeddedDocumentField`, followed by a dot,
 should be used before the name of the field on the embedded document. The
 following example shows how the substitutions are made::
 

docs/guide/signals.rst

@@ -1,5 +1,6 @@
 .. _signals:
 
+=======
 Signals
 =======
 
@@ -7,32 +8,95 @@ Signals
 
 .. note::
 
-  Signal support is provided by the excellent `blinker`_ library and
+  Signal support is provided by the excellent `blinker`_ library. If you wish
-  will gracefully fall back if it is not available.
+  to enable signal support this library must be installed, though it is not
+  required for MongoEngine to function.
 
+Overview
+--------
 
-The following document signals exist in MongoEngine and are pretty self-explanatory:
+Signals are found within the `mongoengine.signals` module.  Unless
+specified signals receive no additional arguments beyond the `sender` class and
+`document` instance.  Post-signals are only called if there were no exceptions
+raised during the processing of their related function.
 
-  * `mongoengine.signals.pre_init`
+Available signals include:
-  * `mongoengine.signals.post_init`
-  * `mongoengine.signals.pre_save`
-  * `mongoengine.signals.post_save`
-  * `mongoengine.signals.pre_delete`
-  * `mongoengine.signals.post_delete`
-  * `mongoengine.signals.pre_bulk_insert`
-  * `mongoengine.signals.post_bulk_insert`
 
-Example usage::
+`pre_init`
+  Called during the creation of a new :class:`~mongoengine.Document` or
+  :class:`~mongoengine.EmbeddedDocument` instance, after the constructor
+  arguments have been collected but before any additional processing has been
+  done to them.  (I.e. assignment of default values.)  Handlers for this signal
+  are passed the dictionary of arguments using the `values` keyword argument
+  and may modify this dictionary prior to returning.
+
+`post_init`
+  Called after all processing of a new :class:`~mongoengine.Document` or
+  :class:`~mongoengine.EmbeddedDocument` instance has been completed.
+
+`pre_save`
+  Called within :meth:`~mongoengine.Document.save` prior to performing
+  any actions.
+
+`pre_save_post_validation`
+  Called within :meth:`~mongoengine.Document.save` after validation
+  has taken place but before saving.
+
+`post_save`
+  Called within :meth:`~mongoengine.Document.save` after most actions
+  (validation, insert/update, and cascades, but not clearing dirty flags) have 
+  completed successfully.  Passed the additional boolean keyword argument 
+  `created` to indicate if the save was an insert or an update.
+
+`pre_delete`
+  Called within :meth:`~mongoengine.Document.delete` prior to
+  attempting the delete operation.
+
+`post_delete`
+  Called within :meth:`~mongoengine.Document.delete` upon successful
+  deletion of the record.
+
+`pre_bulk_insert`
+  Called after validation of the documents to insert, but prior to any data
+  being written. In this case, the `document` argument is replaced by a
+  `documents` argument representing the list of documents being inserted.
+
+`post_bulk_insert`
+  Called after a successful bulk insert operation.  As per `pre_bulk_insert`,
+  the `document` argument is omitted and replaced with a `documents` argument.
+  An additional boolean argument, `loaded`, identifies the contents of
+  `documents` as either :class:`~mongoengine.Document` instances when `True` or
+  simply a list of primary key values for the inserted records if `False`.
+
+Attaching Events
+----------------
+
+After writing a handler function like the following::
+
+    import logging
+    from datetime import datetime
 
     from mongoengine import *
     from mongoengine import signals
 
+    def update_modified(sender, document):
+        document.modified = datetime.utcnow()
+
+You attach the event handler to your :class:`~mongoengine.Document` or
+:class:`~mongoengine.EmbeddedDocument` subclass::
+
+    class Record(Document):
+        modified = DateTimeField()
+
+    signals.pre_save.connect(update_modified)
+
+While this is not the most elaborate document model, it does demonstrate the
+concepts involved.  As a more complete demonstration you can also define your
+handlers within your subclass::
+
     class Author(Document):
         name = StringField()
 
-        def __unicode__(self):
-            return self.name
-
         @classmethod
         def pre_save(cls, sender, document, **kwargs):
             logging.debug("Pre Save: %s" % document.name)
@@ -49,5 +113,33 @@ Example usage::
     signals.pre_save.connect(Author.pre_save, sender=Author)
     signals.post_save.connect(Author.post_save, sender=Author)
 
+Finally, you can also use this small decorator to quickly create a number of
+signals and attach them to your :class:`~mongoengine.Document` or
+:class:`~mongoengine.EmbeddedDocument` subclasses as class decorators::
+
+    def handler(event):
+        """Signal decorator to allow use of callback functions as class decorators."""
+
+        def decorator(fn):
+            def apply(cls):
+                event.connect(fn, sender=cls)
+                return cls
+
+            fn.apply = apply
+            return fn
+
+        return decorator
+
+Using the first example of updating a modification time the code is now much
+cleaner looking while still allowing manual execution of the callback::
+
+    @handler(signals.pre_save)
+    def update_modified(sender, document):
+        document.modified = datetime.utcnow()
+
+    @update_modified.apply
+    class Record(Document):
+        modified = DateTimeField()
+
 
 .. _blinker: http://pypi.python.org/pypi/blinker

docs/guide/text-indexes.rst

@@ -0,0 +1,51 @@
+===========
+Text Search
+===========
+
+After MongoDB 2.4 version, supports search documents by text indexes.
+
+
+Defining a Document with text index
+===================================
+Use the *$* prefix to set a text index, Look the declaration::
+  
+  class News(Document):
+      title = StringField()
+      content = StringField()
+      is_active = BooleanField()
+
+      meta = {'indexes': [
+          {'fields': ['$title', "$content"],
+           'default_language': 'english',
+           'weights': {'title': 10, 'content': 2}
+          }
+      ]}
+
+
+
+Querying
+========
+
+Saving a document::
+
+  News(title="Using mongodb text search",
+       content="Testing text search").save()
+
+  News(title="MongoEngine 0.9 released",
+       content="Various improvements").save()
+
+Next, start a text search using :attr:`QuerySet.search_text` method::
+  
+  document = News.objects.search_text('testing').first()
+  document.title # may be: "Using mongodb text search"
+  
+  document = News.objects.search_text('released').first()
+  document.title # may be: "MongoEngine 0.9 released"
+
+
+Ordering by text score
+======================
+
+::
+
+  objects = News.objects.search_text('mongo').order_by('$text_score')

docs/index.rst

@@ -7,16 +7,18 @@ MongoDB. To install it, simply run
 
 .. code-block:: console
 
-    # pip install -U mongoengine
+    $ pip install -U mongoengine
 
 :doc:`tutorial`
-  Start here for a quick overview.
+  A quick tutorial building a tumblelog to get you up and running with
+  MongoEngine.
 
 :doc:`guide/index`
-  The Full guide to MongoEngine
+  The Full guide to MongoEngine --- from modeling documents to storing files,
+  from querying for data to firing signals and *everything* between.
 
 :doc:`apireference`
-  The complete API documentation.
+  The complete API documentation --- the innards of documents, querysets and fields.
 
 :doc:`upgrade`
   How to upgrade MongoEngine.
@@ -28,35 +30,50 @@ Community
 ---------
 
 To get help with using MongoEngine, use the `MongoEngine Users mailing list
-<http://groups.google.com/group/mongoengine-users>`_ or come chat on the
+<http://groups.google.com/group/mongoengine-users>`_ or the ever popular
-`#mongoengine IRC channel <irc://irc.freenode.net/mongoengine>`_.
+`stackoverflow <http://www.stackoverflow.com>`_.
 
 Contributing
 ------------
 
-The source is available on `GitHub <http://github.com/hmarr/mongoengine>`_ and
+**Yes please!**  We are always looking for contributions, additions and improvements.
-contributions are always encouraged. Contributions can be as simple as
-minor tweaks to this documentation. To contribute, fork the project on
-`GitHub <http://github.com/hmarr/mongoengine>`_ and send a
-pull request.
 
-Also, you can join the developers' `mailing list
+The source is available on `GitHub <http://github.com/MongoEngine/mongoengine>`_
-<http://groups.google.com/group/mongoengine-dev>`_.
+and contributions are always encouraged. Contributions can be as simple as
+minor tweaks to this documentation, the website or the core.
+
+To contribute, fork the project on
+`GitHub <http://github.com/MongoEngine/mongoengine>`_ and send a
+pull request.
 
 Changes
 -------
+
 See the :doc:`changelog` for a full list of changes to MongoEngine and
 :doc:`upgrade` for upgrade information.
 
+.. note::  Always read and test the `upgrade <upgrade>`_ documentation before
+    putting updates live in production **;)**
+
+Offline Reading
+---------------
+
+Download the docs in `pdf <https://media.readthedocs.org/pdf/mongoengine-odm/latest/mongoengine-odm.pdf>`_
+or `epub <https://media.readthedocs.org/epub/mongoengine-odm/latest/mongoengine-odm.epub>`_
+formats for offline reading.
+
+
 .. toctree::
+    :maxdepth: 1
+    :numbered:
     :hidden:
 
     tutorial
     guide/index
     apireference
-   django
     changelog
     upgrade
+    django
 
 Indices and tables
 ------------------

docs/tutorial.rst

@@ -1,68 +1,78 @@
 ========
 Tutorial
 ========
+
 This tutorial introduces **MongoEngine** by means of example --- we will walk
-through how to create a simple **Tumblelog** application. A Tumblelog is a type
+through how to create a simple **Tumblelog** application. A tumblelog is a
-of blog where posts are not constrained to being conventional text-based posts.
+blog that supports mixed media content, including text, images, links, video,
-As well as text-based entries, users may post images, links, videos, etc. For
+audio, etc. For simplicity's sake, we'll stick to text, image, and link
-simplicity's sake, we'll stick to text, image and link entries in our
+entries. As the purpose of this tutorial is to introduce MongoEngine, we'll
-application. As the purpose of this tutorial is to introduce MongoEngine, we'll
 focus on the data-modelling side of the application, leaving out a user
 interface.
 
 Getting started
 ===============
+
 Before we start, make sure that a copy of MongoDB is running in an accessible
 location --- running it locally will be easier, but if that is not an option
-then it may be run on a remote server.
+then it may be run on a remote server. If you haven't installed MongoEngine,
+simply use pip to install it like so::
+
+    $ pip install mongoengine
 
 Before we can start using MongoEngine, we need to tell it how to connect to our
 instance of :program:`mongod`. For this we use the :func:`~mongoengine.connect`
-function. The only argument we need to provide is the name of the MongoDB
+function. If running locally, the only argument we need to provide is the name
-database to use::
+of the MongoDB database to use::
 
     from mongoengine import *
 
     connect('tumblelog')
 
-For more information about connecting to MongoDB see :ref:`guide-connecting`.
+There are lots of options for connecting to MongoDB, for more information about
+them see the :ref:`guide-connecting` guide.
 
 Defining our documents
 ======================
+
 MongoDB is *schemaless*, which means that no schema is enforced by the database
 --- we may add and remove fields however we want and MongoDB won't complain.
 This makes life a lot easier in many regards, especially when there is a change
-to the data model. However, defining schemata for our documents can help to
+to the data model. However, defining schemas for our documents can help to iron
-iron out bugs involving incorrect types or missing fields, and also allow us to
+out bugs involving incorrect types or missing fields, and also allow us to
 define utility methods on our documents in the same way that traditional
 :abbr:`ORMs (Object-Relational Mappers)` do.
 
 In our Tumblelog application we need to store several different types of
 information. We will need to have a collection of **users**, so that we may
-link posts to an individual. We also need to store our different types
+link posts to an individual. We also need to store our different types of
-**posts** (text, image and link) in the database. To aid navigation of our
+**posts** (eg: text, image and link) in the database. To aid navigation of our
 Tumblelog, posts may have **tags** associated with them, so that the list of
 posts shown to the user may be limited to posts that have been assigned a
-specified tag.  Finally, it would be nice if **comments** could be added to
+specific tag. Finally, it would be nice if **comments** could be added to
-posts. We'll start with **users**, as the others are slightly more involved.
+posts. We'll start with **users**, as the other document models are slightly
+more involved.
 
 Users
 -----
+
 Just as if we were using a relational database with an ORM, we need to define
-which fields a :class:`User` may have, and what their types will be::
+which fields a :class:`User` may have, and what types of data they might store::
 
     class User(Document):
         email = StringField(required=True)
         first_name = StringField(max_length=50)
         last_name = StringField(max_length=50)
 
-This looks similar to how a the structure of a table would be defined in a
+This looks similar to how the structure of a table would be defined in a
 regular ORM. The key difference is that this schema will never be passed on to
-MongoDB --- this will only be enforced at the application level. Also, the User
+MongoDB --- this will only be enforced at the application level, making future
-documents will be stored in a MongoDB *collection* rather than a table.
+changes easy to manage. Also, the User documents will be stored in a
+MongoDB *collection* rather than a table.
 
 Posts, Comments and Tags
 ------------------------
+
 Now we'll think about how to store the rest of the information. If we were
 using a relational database, we would most likely have a table of **posts**, a
 table of **comments** and a table of **tags**.  To associate the comments with
@@ -75,21 +85,25 @@ of them stand out as particularly intuitive solutions.
 
 Posts
 ^^^^^
-But MongoDB *isn't* a relational database, so we're not going to do it that
+
+Happily MongoDB *isn't* a relational database, so we're not going to do it that
 way. As it turns out, we can use MongoDB's schemaless nature to provide us with
-a much nicer solution. We will store all of the posts in *one collection* ---
+a much nicer solution. We will store all of the posts in *one collection* and
-each post type will just have the fields it needs. If we later want to add
+each post type will only store the fields it needs. If we later want to add
 video posts, we don't have to modify the collection at all, we just *start
 using* the new fields we need to support video posts. This fits with the
 Object-Oriented principle of *inheritance* nicely. We can think of
 :class:`Post` as a base class, and :class:`TextPost`, :class:`ImagePost` and
 :class:`LinkPost` as subclasses of :class:`Post`. In fact, MongoEngine supports
-this kind of modelling out of the box::
+this kind of modeling out of the box --- all you need do is turn on inheritance
+by setting :attr:`allow_inheritance` to True in the :attr:`meta`::
 
     class Post(Document):
         title = StringField(max_length=120, required=True)
         author = ReferenceField(User)
 
+        meta = {'allow_inheritance': True}
+
     class TextPost(Post):
         content = StringField()
 
@@ -100,20 +114,21 @@ this kind of modelling out of the box::
         link_url = StringField()
 
 We are storing a reference to the author of the posts using a
-:class:`~mongoengine.ReferenceField` object. These are similar to foreign key
+:class:`~mongoengine.fields.ReferenceField` object. These are similar to foreign key
 fields in traditional ORMs, and are automatically translated into references
 when they are saved, and dereferenced when they are loaded.
 
 Tags
 ^^^^
+
 Now that we have our Post models figured out, how will we attach tags to them?
 MongoDB allows us to store lists of items natively, so rather than having a
 link table, we can just store a list of tags in each post. So, for both
 efficiency and simplicity's sake, we'll store the tags as strings directly
 within the post, rather than storing references to tags in a separate
 collection. Especially as tags are generally very short (often even shorter
-than a document's id), this denormalisation won't impact very strongly on the
+than a document's id), this denormalization won't impact the size of the
-size of our database. So let's take a look that the code our modified
+database very strongly. Let's take a look at the code of our modified
 :class:`Post` class::
 
     class Post(Document):
@@ -121,21 +136,24 @@ size of our database. So let's take a look that the code our modified
         author = ReferenceField(User)
         tags = ListField(StringField(max_length=30))
 
-The :class:`~mongoengine.ListField` object that is used to define a Post's tags
+The :class:`~mongoengine.fields.ListField` object that is used to define a Post's tags
 takes a field object as its first argument --- this means that you can have
-lists of any type of field (including lists). Note that we don't need to
+lists of any type of field (including lists).
-modify the specialised post types as they all inherit from :class:`Post`.
+
+.. note:: We don't need to modify the specialized post types as they all
+    inherit from :class:`Post`.
 
 Comments
 ^^^^^^^^
+
 A comment is typically associated with *one* post. In a relational database, to
 display a post with its comments, we would have to retrieve the post from the
-database, then query the database again for the comments associated with the
+database and then query the database again for the comments associated with the
 post. This works, but there is no real reason to be storing the comments
 separately from their associated posts, other than to work around the
 relational model. Using MongoDB we can store the comments as a list of
 *embedded documents* directly on a post document. An embedded document should
-be treated no differently that a regular document; it just doesn't have its own
+be treated no differently than a regular document; it just doesn't have its own
 collection in the database. Using MongoEngine, we can define the structure of
 embedded documents, along with utility methods, in exactly the same way we do
 with regular documents::
@@ -155,7 +173,7 @@ We can then store a list of comment documents in our post document::
 Handling deletions of references
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-The :class:`~mongoengine.ReferenceField` object takes a keyword
+The :class:`~mongoengine.fields.ReferenceField` object takes a keyword
 `reverse_delete_rule` for handling deletion rules if the reference is deleted.
 To delete all the posts if a user is deleted set the rule::
 
@@ -165,7 +183,7 @@ To delete all the posts if a user is deleted set the rule::
         tags = ListField(StringField(max_length=30))
         comments = ListField(EmbeddedDocumentField(Comment))
 
-See :class:`~mongoengine.ReferenceField` for more information.
+See :class:`~mongoengine.fields.ReferenceField` for more information.
 
 .. note::
     MapFields and DictFields currently don't support automatic handling of
@@ -178,33 +196,37 @@ Now that we've defined how our documents will be structured, let's start adding
 some documents to the database. Firstly, we'll need to create a :class:`User`
 object::
 
-    john = User(email='jdoe@example.com', first_name='John', last_name='Doe')
+    ross = User(email='ross@example.com', first_name='Ross', last_name='Lawley').save()
-    john.save()
 
-Note that we could have also defined our user using attribute syntax::
+.. note::
+    We could have also defined our user using attribute syntax::
 
-    john = User(email='jdoe@example.com')
+        ross = User(email='ross@example.com')
-    john.first_name = 'John'
+        ross.first_name = 'Ross'
-    john.last_name = 'Doe'
+        ross.last_name = 'Lawley'
-    john.save()
+        ross.save()
 
-Now that we've got our user in the database, let's add a couple of posts::
+Assign another user to a variable called ``john``, just like we did above with
+``ross``.
+
+Now that we've got our users in the database, let's add a couple of posts::
 
     post1 = TextPost(title='Fun with MongoEngine', author=john)
     post1.content = 'Took a look at MongoEngine today, looks pretty cool.'
     post1.tags = ['mongodb', 'mongoengine']
     post1.save()
 
-    post2 = LinkPost(title='MongoEngine Documentation', author=john)
+    post2 = LinkPost(title='MongoEngine Documentation', author=ross)
-    post2.link_url = 'http://tractiondigital.com/labs/mongoengine/docs'
+    post2.link_url = 'http://docs.mongoengine.com/'
     post2.tags = ['mongoengine']
     post2.save()
 
-Note that if you change a field on a object that has already been saved, then
+.. note:: If you change a field on an object that has already been saved and
-call :meth:`save` again, the document will be updated.
+    then call :meth:`save` again, the document will be updated.
 
 Accessing our data
 ==================
+
 So now we've got a couple of posts in our database, how do we display them?
 Each document class (i.e. any class that inherits either directly or indirectly
 from :class:`~mongoengine.Document`) has an :attr:`objects` attribute, which is
@@ -212,16 +234,17 @@ used to access the documents in the database collection associated with that
 class. So let's see how we can get our posts' titles::
 
     for post in Post.objects:
-        print post.title
+        print(post.title)
 
 Retrieving type-specific information
 ------------------------------------
-This will print the titles of our posts, one on each line. But What if we want
+
+This will print the titles of our posts, one on each line. But what if we want
 to access the type-specific data (link_url, content, etc.)? One way is simply
 to use the :attr:`objects` attribute of a subclass of :class:`Post`::
 
     for post in TextPost.objects:
-        print post.content
+        print(post.content)
 
 Using TextPost's :attr:`objects` attribute only returns documents that were
 created using :class:`TextPost`. Actually, there is a more general rule here:
@@ -238,22 +261,21 @@ instances of :class:`Post` --- they were instances of the subclass of
 practice::
 
     for post in Post.objects:
-        print post.title
+        print(post.title)
-        print '=' * len(post.title)
+        print('=' * len(post.title))
 
         if isinstance(post, TextPost):
-            print post.content
+            print(post.content)
 
         if isinstance(post, LinkPost):
-            print 'Link:', post.link_url
+            print('Link: {}'.format(post.link_url))
-
-        print
 
 This would print the title of each post, followed by the content if it was a
 text post, and "Link: <url>" if it was a link post.
 
 Searching our posts by tag
 --------------------------
+
 The :attr:`objects` attribute of a :class:`~mongoengine.Document` is actually a
 :class:`~mongoengine.queryset.QuerySet` object. This lazily queries the
 database only when you need the data. It may also be filtered to narrow down
@@ -261,7 +283,7 @@ your query.  Let's adjust our query so that only posts with the tag "mongodb"
 are returned::
 
     for post in Post.objects(tags='mongodb'):
-        print post.title
+        print(post.title)
 
 There are also methods available on :class:`~mongoengine.queryset.QuerySet`
 objects that allow different results to be returned, for example, calling
@@ -270,5 +292,11 @@ the first matched by the query you provide. Aggregation functions may also be
 used on :class:`~mongoengine.queryset.QuerySet` objects::
 
     num_posts = Post.objects(tags='mongodb').count()
-    print 'Found %d posts with tag "mongodb"' % num_posts
+    print('Found {} posts with tag "mongodb"'.format(num_posts))
 
+Learning more about MongoEngine
+-------------------------------
+
+If you got this far you've made a great start, so well done! The next step on
+your MongoEngine journey is the `full user guide <guide/index.html>`_, where
+you can learn in-depth about how to use MongoEngine and MongoDB.

docs/upgrade.rst

@@ -1,12 +1,444 @@
-=========
+#########
 Upgrading
-=========
+#########
 
-0.6 to 0.7
+Development
+***********
+(Fill this out whenever you introduce breaking changes to MongoEngine)
+
+0.14.0
+******
+This release includes a few bug fixes and a significant code cleanup. The most
+important change is that `QuerySet.as_pymongo` no longer supports a
+`coerce_types` mode. If you used it in the past, a) please let us know of your
+use case, b) you'll need to override `as_pymongo` to get the desired outcome.
+
+This release also makes the EmbeddedDocument not hashable by default. If you
+use embedded documents in sets or dictionaries, you might have to override
+`__hash__` and implement a hashing logic specific to your use case. See #1528
+for the reason behind this change.
+
+0.13.0
+******
+This release adds Unicode support to the `EmailField` and changes its
+structure significantly. Previously, email addresses containing Unicode
+characters didn't work at all. Starting with v0.13.0, domains with Unicode
+characters are supported out of the box, meaning some emails that previously
+didn't pass validation now do. Make sure the rest of your application can
+accept such email addresses. Additionally, if you subclassed the `EmailField`
+in your application and overrode `EmailField.EMAIL_REGEX`, you will have to
+adjust your code to override `EmailField.USER_REGEX`, `EmailField.DOMAIN_REGEX`,
+and potentially `EmailField.UTF8_USER_REGEX`.
+
+0.12.0
+******
+This release includes various fixes for the `BaseQuerySet` methods and how they
+are chained together. Since version 0.10.1 applying limit/skip/hint/batch_size
+to an already-existing queryset wouldn't modify the underlying PyMongo cursor.
+This has been fixed now, so you'll need to make sure that your code didn't rely
+on the broken implementation.
+
+Additionally, a public `BaseQuerySet.clone_into` has been renamed to a private
+`_clone_into`. If you directly used that method in your code, you'll need to
+rename its occurrences.
+
+0.11.0
+******
+This release includes a major rehaul of MongoEngine's code quality and
+introduces a few breaking changes. It also touches many different parts of
+the package and although all the changes have been tested and scrutinized,
+you're encouraged to thorougly test the upgrade.
+
+First breaking change involves renaming `ConnectionError` to `MongoEngineConnectionError`.
+If you import or catch this exception, you'll need to rename it in your code.
+
+Second breaking change drops Python v2.6 support. If you run MongoEngine on
+that Python version, you'll need to upgrade it first.
+
+Third breaking change drops an old backward compatibility measure where
+`from mongoengine.base import ErrorClass` would work on top of
+`from mongoengine.errors import ErrorClass` (where `ErrorClass` is e.g.
+`ValidationError`). If you import any exceptions from `mongoengine.base`,
+change it to `mongoengine.errors`.
+
+0.10.8
+******
+This version fixed an issue where specifying a MongoDB URI host would override
+more information than it should. These changes are minor, but they still
+subtly modify the connection logic and thus you're encouraged to test your
+MongoDB connection before shipping v0.10.8 in production.
+
+0.10.7
+******
+
+`QuerySet.aggregate_sum` and `QuerySet.aggregate_average` are dropped. Use
+`QuerySet.sum` and `QuerySet.average` instead which use the aggreation framework
+by default from now on.
+
+0.9.0
+*****
+
+The 0.8.7 package on pypi was corrupted.  If upgrading from 0.8.7 to 0.9.0 please follow: ::
+
+    pip uninstall pymongo
+    pip uninstall mongoengine
+    pip install pymongo==2.8
+    pip install mongoengine
+
+0.8.7
+*****
+
+Calling reload on deleted / nonexistent documents now raises a DoesNotExist
+exception.
+
+
+0.8.2 to 0.8.3
+**************
+
+Minor change that may impact users:
+
+DynamicDocument fields are now stored in creation order after any declared
+fields.  Previously they were stored alphabetically.
+
+
+0.7 to 0.8
+**********
+
+There have been numerous backwards breaking changes in 0.8.  The reasons for
+these are to ensure that MongoEngine has sane defaults going forward and that it
+performs the best it can out of the box.  Where possible there have been
+FutureWarnings to help get you ready for the change, but that hasn't been
+possible for the whole of the release.
+
+.. warning:: Breaking changes - test upgrading on a test system before putting
+    live. There maybe multiple manual steps in migrating and these are best honed
+    on a staging / test system.
+
+Python and PyMongo
+==================
+
+MongoEngine requires python 2.6 (or above) and pymongo 2.5 (or above)
+
+Data Model
 ==========
 
+Inheritance
+-----------
+
+The inheritance model has changed, we no longer need to store an array of
+:attr:`types` with the model we can just use the classname in :attr:`_cls`.
+This means that you will have to update your indexes for each of your
+inherited classes like so: ::
+
+    # 1. Declaration of the class
+    class Animal(Document):
+        name = StringField()
+        meta = {
+            'allow_inheritance': True,
+            'indexes': ['name']
+        }
+
+    # 2. Remove _types
+    collection = Animal._get_collection()
+    collection.update({}, {"$unset": {"_types": 1}}, multi=True)
+
+    # 3. Confirm extra data is removed
+    count = collection.find({'_types': {"$exists": True}}).count()
+    assert count == 0
+
+    # 4. Remove indexes
+    info = collection.index_information()
+    indexes_to_drop = [key for key, value in info.iteritems()
+                       if '_types' in dict(value['key'])]
+    for index in indexes_to_drop:
+        collection.drop_index(index)
+
+    # 5. Recreate indexes
+    Animal.ensure_indexes()
+
+
+Document Definition
+-------------------
+
+The default for inheritance has changed - it is now off by default and
+:attr:`_cls` will not be stored automatically with the class.  So if you extend
+your :class:`~mongoengine.Document` or :class:`~mongoengine.EmbeddedDocuments`
+you will need to declare :attr:`allow_inheritance` in the meta data like so: ::
+
+    class Animal(Document):
+        name = StringField()
+
+        meta = {'allow_inheritance': True}
+
+Previously, if you had data in the database that wasn't defined in the Document
+definition, it would set it as an attribute on the document.  This is no longer
+the case and the data is set only in the ``document._data`` dictionary: ::
+
+    >>> from mongoengine import *
+    >>> class Animal(Document):
+    ...    name = StringField()
+    ...
+    >>> cat = Animal(name="kit", size="small")
+
+    # 0.7
+    >>> cat.size
+    u'small'
+
+    # 0.8
+    >>> cat.size
+    Traceback (most recent call last):
+      File "<stdin>", line 1, in <module>
+    AttributeError: 'Animal' object has no attribute 'size'
+
+The Document class has introduced a reserved function `clean()`, which will be
+called before saving the document. If your document class happens to have a method
+with the same name, please try to rename it.
+
+    def clean(self):
+        pass
+
+ReferenceField
+--------------
+
+ReferenceFields now store ObjectIds by default - this is more efficient than
+DBRefs as we already know what Document types they reference::
+
+    # Old code
+    class Animal(Document):
+        name = ReferenceField('self')
+
+    # New code to keep dbrefs
+    class Animal(Document):
+        name = ReferenceField('self', dbref=True)
+
+To migrate all the references you need to touch each object and mark it as dirty
+eg::
+
+    # Doc definition
+    class Person(Document):
+        name = StringField()
+        parent = ReferenceField('self')
+        friends = ListField(ReferenceField('self'))
+
+    # Mark all ReferenceFields as dirty and save
+    for p in Person.objects:
+        p._mark_as_changed('parent')
+        p._mark_as_changed('friends')
+        p.save()
+
+`An example test migration for ReferenceFields is available on github
+<https://github.com/MongoEngine/mongoengine/blob/master/tests/migration/refrencefield_dbref_to_object_id.py>`_.
+
+.. Note:: Internally mongoengine handles ReferenceFields the same, so they are
+   converted to DBRef on loading and ObjectIds or DBRefs depending on settings
+   on storage.
+
+UUIDField
+---------
+
+UUIDFields now default to storing binary values::
+
+    # Old code
+    class Animal(Document):
+        uuid = UUIDField()
+
+    # New code
+    class Animal(Document):
+        uuid = UUIDField(binary=False)
+
+To migrate all the uuids you need to touch each object and mark it as dirty
+eg::
+
+    # Doc definition
+    class Animal(Document):
+        uuid = UUIDField()
+
+    # Mark all UUIDFields as dirty and save
+    for a in Animal.objects:
+        a._mark_as_changed('uuid')
+        a.save()
+
+`An example test migration for UUIDFields is available on github
+<https://github.com/MongoEngine/mongoengine/blob/master/tests/migration/uuidfield_to_binary.py>`_.
+
+DecimalField
+------------
+
+DecimalFields now store floats - previously it was storing strings and that
+made it impossible to do comparisons when querying correctly.::
+
+    # Old code
+    class Person(Document):
+        balance = DecimalField()
+
+    # New code
+    class Person(Document):
+        balance = DecimalField(force_string=True)
+
+To migrate all the DecimalFields you need to touch each object and mark it as dirty
+eg::
+
+    # Doc definition
+    class Person(Document):
+        balance = DecimalField()
+
+    # Mark all DecimalField's as dirty and save
+    for p in Person.objects:
+        p._mark_as_changed('balance')
+        p.save()
+
+.. note:: DecimalFields have also been improved with the addition of precision
+    and rounding.  See :class:`~mongoengine.fields.DecimalField` for more information.
+
+`An example test migration for DecimalFields is available on github
+<https://github.com/MongoEngine/mongoengine/blob/master/tests/migration/decimalfield_as_float.py>`_.
+
+Cascading Saves
+---------------
+To improve performance document saves will no longer automatically cascade.
+Any changes to a Document's references will either have to be saved manually or
+you will have to explicitly tell it to cascade on save::
+
+    # At the class level:
+    class Person(Document):
+        meta = {'cascade': True}
+
+    # Or on save:
+    my_document.save(cascade=True)
+
+Storage
+-------
+
+Document and Embedded Documents are now serialized based on declared field order.
+Previously, the data was passed to mongodb as a dictionary and which meant that
+order wasn't guaranteed - so things like ``$addToSet`` operations on
+:class:`~mongoengine.EmbeddedDocument` could potentially fail in unexpected
+ways.
+
+If this impacts you, you may want to rewrite the objects using the
+``doc.mark_as_dirty('field')`` pattern described above.  If you are using a
+compound primary key then you will need to ensure the order is fixed and match
+your EmbeddedDocument to that order.
+
+Querysets
+=========
+
+Attack of the clones
+--------------------
+
+Querysets now return clones and should no longer be considered editable in
+place.  This brings us in line with how Django's querysets work and removes a
+long running gotcha.  If you edit your querysets inplace you will have to
+update your code like so: ::
+
+    # Old code:
+    mammals = Animal.objects(type="mammal")
+    mammals.filter(order="Carnivora")       # Returns a cloned queryset that isn't assigned to anything - so this will break in 0.8
+    [m for m in mammals]                    # This will return all mammals in 0.8 as the 2nd filter returned a new queryset
+
+    # Update example a) assign queryset after a change:
+    mammals = Animal.objects(type="mammal")
+    carnivores = mammals.filter(order="Carnivora") # Reassign the new queryset so filter can be applied
+    [m for m in carnivores]                        # This will return all carnivores
+
+    # Update example b) chain the queryset:
+    mammals = Animal.objects(type="mammal").filter(order="Carnivora")  # The final queryset is assgined to mammals
+    [m for m in mammals]                                               # This will return all carnivores
+
+Len iterates the queryset
+-------------------------
+
+If you ever did `len(queryset)` it previously did a `count()` under the covers,
+this caused some unusual issues.  As `len(queryset)` is most often used by
+`list(queryset)` we now cache the queryset results and use that for the length.
+
+This isn't as performant as a `count()` and if you aren't iterating the
+queryset you should upgrade to use count::
+
+    # Old code
+    len(Animal.objects(type="mammal"))
+
+    # New code
+    Animal.objects(type="mammal").count()
+
+
+.only() now inline with .exclude()
+----------------------------------
+
+The behaviour of `.only()` was highly ambiguous, now it works in mirror fashion
+to `.exclude()`.  Chaining `.only()` calls will increase the fields required::
+
+    # Old code
+    Animal.objects().only(['type', 'name']).only('name', 'order')  # Would have returned just `name`
+
+    # New code
+    Animal.objects().only('name')
+
+    # Note:
+    Animal.objects().only(['name']).only('order')  # Now returns `name` *and* `order`
+
+
+Client
+======
+PyMongo 2.4 came with a new connection client; MongoClient_ and started the
+depreciation of the old :class:`~pymongo.connection.Connection`. MongoEngine
+now uses the latest `MongoClient` for connections.  By default operations were
+`safe` but if you turned them off or used the connection directly this will
+impact your queries.
+
+Querysets
+---------
+
+Safe
+^^^^
+
+`safe` has been depreciated in the new MongoClient connection.  Please use
+`write_concern` instead.  As `safe` always defaulted as `True` normally no code
+change is required. To disable confirmation of the write just pass `{"w": 0}`
+eg: ::
+
+   # Old
+   Animal(name="Dinasour").save(safe=False)
+
+   # new code:
+   Animal(name="Dinasour").save(write_concern={"w": 0})
+
+Write Concern
+^^^^^^^^^^^^^
+
+`write_options` has been replaced with `write_concern` to bring it inline with
+pymongo. To upgrade simply rename any instances where you used the `write_option`
+keyword  to `write_concern` like so::
+
+   # Old code:
+   Animal(name="Dinasour").save(write_options={"w": 2})
+
+   # new code:
+   Animal(name="Dinasour").save(write_concern={"w": 2})
+
+
+Indexes
+=======
+
+Index methods are no longer tied to querysets but rather to the document class.
+Although `QuerySet._ensure_indexes` and `QuerySet.ensure_index` still exist.
+They should be replaced with :func:`~mongoengine.Document.ensure_indexes` /
+:func:`~mongoengine.Document.ensure_index`.
+
+SequenceFields
+==============
+
+:class:`~mongoengine.fields.SequenceField` now inherits from `BaseField` to
+allow flexible storage of the calculated value.  As such MIN and MAX settings
+are no longer handled.
+
+.. _MongoClient: http://blog.mongodb.org/post/36666163412/introducing-mongoclient
+
+0.6 to 0.7
+**********
+
 Cascade saves
--------------
+=============
 
 Saves will raise a `FutureWarning` if they cascade and cascade hasn't been set
 to True.  This is because in 0.8 it will default to False.  If you require
@@ -24,7 +456,7 @@ via `save` eg ::
     Remember: cascading saves **do not** cascade through lists.
 
 ReferenceFields
----------------
+===============
 
 ReferenceFields now can store references as ObjectId strings instead of DBRefs.
 This will become the default in 0.8 and if `dbref` is not set a `FutureWarning`
@@ -53,7 +485,7 @@ migrate ::
 
 
 item_frequencies
-----------------
+================
 
 In the 0.6 series we added support for null / zero / false values in
 item_frequencies.  A side effect was to return keys in the value they are
@@ -61,8 +493,15 @@ stored in rather than as string representations.  Your code may need to be
 updated to handle native types rather than strings keys for the results of
 item frequency queries.
 
+BinaryFields
+============
+
+Binary fields have been updated so that they are native binary types.  If you
+previously were doing `str` comparisons with binary field values you will have
+to update and wrap the value in a `str`.
+
 0.5 to 0.6
-==========
+**********
 
 Embedded Documents - if you had a `pk` field you will have to rename it from
 `_id` to `pk` as pk is no longer a property of Embedded Documents.
@@ -77,18 +516,18 @@ Document.objects.with_id - now raises an InvalidQueryError if used with a
 filter.
 
 FutureWarning - A future warning has been added to all inherited classes that
-don't define `allow_inheritance` in their meta.
+don't define :attr:`allow_inheritance` in their meta.
 
 You may need to update pyMongo to 2.0 for use with Sharding.
 
 0.4 to 0.5
-===========
+**********
 
 There have been the following backwards incompatibilities from 0.4 to 0.5.  The
 main areas of changed are: choices in fields, map_reduce and collection names.
 
 Choice options:
----------------
+===============
 
 Are now expected to be an iterable of tuples, with the first element in each
 tuple being the actual value to be stored. The second element is the
@@ -96,7 +535,7 @@ human-readable name for the option.
 
 
 PyMongo / MongoDB
------------------
+=================
 
 map reduce now requires pymongo 1.11+- The pymongo `merge_output` and
 `reduce_output` parameters, have been depreciated.
@@ -110,10 +549,10 @@ such the following have been changed:
 
 
 Default collection naming
--------------------------
+=========================
 
-Previously it was just lowercase, its now much more pythonic and readable as
+Previously it was just lowercase, it's now much more pythonic and readable as
-its lowercase and underscores, previously ::
+it's lowercase and underscores, previously ::
 
     class MyAceDocument(Document):
         pass
@@ -176,3 +615,9 @@ Alternatively, you can rename your collections eg ::
         else:
             print "Upgraded collection names"
 
+
+mongodb 1.8 > 2.0 +
+===================
+
+It's been reported that indexes may need to be recreated to the newer version of indexes.
+To do this drop indexes and call ``ensure_indexes`` on each model.

mongoengine/__init__.py

@@ -1,23 +1,36 @@
-import document
+# Import submodules so that we can expose their __all__
-from document import *
+from mongoengine import connection
-import fields
+from mongoengine import document
-from fields import *
+from mongoengine import errors
-import connection
+from mongoengine import fields
-from connection import *
+from mongoengine import queryset
-import queryset
+from mongoengine import signals
-from queryset import *
-import signals
-from signals import *
 
-__all__ = (document.__all__ + fields.__all__ + connection.__all__ +
+# Import everything from each submodule so that it can be accessed via
-           queryset.__all__ + signals.__all__)
+# mongoengine, e.g. instead of `from mongoengine.connection import connect`,
+# users can simply use `from mongoengine import connect`, or even
+# `from mongoengine import *` and then `connect('testdb')`.
+from mongoengine.connection import *
+from mongoengine.document import *
+from mongoengine.errors import *
+from mongoengine.fields import *
+from mongoengine.queryset import *
+from mongoengine.signals import *
 
-VERSION = (0, '7rc1')
+
+__all__ = (list(document.__all__) + list(fields.__all__) +
+           list(connection.__all__) + list(queryset.__all__) +
+           list(signals.__all__) + list(errors.__all__))
+
+
+VERSION = (0, 15, 3)
 
 
 def get_version():
-    if isinstance(VERSION[-1], basestring):
+    """Return the VERSION as a string, e.g. for VERSION == (0, 10, 7),
-        return '.'.join(map(str, VERSION[:-1])) + VERSION[-1]
+    return '0.10.7'.
+    """
     return '.'.join(map(str, VERSION))
 
+
 __version__ = get_version()

mongoengine/base/__init__.py

@@ -0,0 +1,28 @@
+# Base module is split into several files for convenience. Files inside of
+# this module should import from a specific submodule (e.g.
+# `from mongoengine.base.document import BaseDocument`), but all of the
+# other modules should import directly from the top-level module (e.g.
+# `from mongoengine.base import BaseDocument`). This approach is cleaner and
+# also helps with cyclical import errors.
+from mongoengine.base.common import *
+from mongoengine.base.datastructures import *
+from mongoengine.base.document import *
+from mongoengine.base.fields import *
+from mongoengine.base.metaclasses import *
+
+__all__ = (
+    # common
+    'UPDATE_OPERATORS', '_document_registry', 'get_document',
+
+    # datastructures
+    'BaseDict', 'BaseList', 'EmbeddedDocumentList', 'LazyReference',
+
+    # document
+    'BaseDocument',
+
+    # fields
+    'BaseField', 'ComplexBaseField', 'ObjectIdField', 'GeoJsonBaseField',
+
+    # metaclasses
+    'DocumentMetaclass', 'TopLevelDocumentMetaclass'
+)

mongoengine/base/common.py

@@ -0,0 +1,32 @@
+from mongoengine.errors import NotRegistered
+
+__all__ = ('UPDATE_OPERATORS', 'get_document', '_document_registry')
+
+
+UPDATE_OPERATORS = set(['set', 'unset', 'inc', 'dec', 'mul',
+                        'pop', 'push', 'push_all', 'pull',
+                        'pull_all', 'add_to_set', 'set_on_insert',
+                        'min', 'max', 'rename'])
+
+
+_document_registry = {}
+
+
+def get_document(name):
+    """Get a document class by name."""
+    doc = _document_registry.get(name, None)
+    if not doc:
+        # Possible old style name
+        single_end = name.split('.')[-1]
+        compound_end = '.%s' % single_end
+        possible_match = [k for k in _document_registry.keys()
+                          if k.endswith(compound_end) or k == single_end]
+        if len(possible_match) == 1:
+            doc = _document_registry.get(possible_match.pop(), None)
+    if not doc:
+        raise NotRegistered("""
+            `%s` has not been registered in the document registry.
+            Importing the document class automatically registers it, has it
+            been imported?
+        """.strip() % name)
+    return doc

mongoengine/base/datastructures.py

@@ -0,0 +1,488 @@
+import itertools
+import weakref
+
+from bson import DBRef
+import six
+
+from mongoengine.common import _import_class
+from mongoengine.errors import DoesNotExist, MultipleObjectsReturned
+
+__all__ = ('BaseDict', 'BaseList', 'EmbeddedDocumentList', 'LazyReference')
+
+
+class BaseDict(dict):
+    """A special dict so we can watch any changes."""
+
+    _dereferenced = False
+    _instance = None
+    _name = None
+
+    def __init__(self, dict_items, instance, name):
+        Document = _import_class('Document')
+        EmbeddedDocument = _import_class('EmbeddedDocument')
+
+        if isinstance(instance, (Document, EmbeddedDocument)):
+            self._instance = weakref.proxy(instance)
+        self._name = name
+        super(BaseDict, self).__init__(dict_items)
+
+    def __getitem__(self, key, *args, **kwargs):
+        value = super(BaseDict, self).__getitem__(key)
+
+        EmbeddedDocument = _import_class('EmbeddedDocument')
+        if isinstance(value, EmbeddedDocument) and value._instance is None:
+            value._instance = self._instance
+        elif not isinstance(value, BaseDict) and isinstance(value, dict):
+            value = BaseDict(value, None, '%s.%s' % (self._name, key))
+            super(BaseDict, self).__setitem__(key, value)
+            value._instance = self._instance
+        elif not isinstance(value, BaseList) and isinstance(value, list):
+            value = BaseList(value, None, '%s.%s' % (self._name, key))
+            super(BaseDict, self).__setitem__(key, value)
+            value._instance = self._instance
+        return value
+
+    def __setitem__(self, key, value, *args, **kwargs):
+        self._mark_as_changed(key)
+        return super(BaseDict, self).__setitem__(key, value)
+
+    def __delete__(self, *args, **kwargs):
+        self._mark_as_changed()
+        return super(BaseDict, self).__delete__(*args, **kwargs)
+
+    def __delitem__(self, key, *args, **kwargs):
+        self._mark_as_changed(key)
+        return super(BaseDict, self).__delitem__(key)
+
+    def __delattr__(self, key, *args, **kwargs):
+        self._mark_as_changed(key)
+        return super(BaseDict, self).__delattr__(key)
+
+    def __getstate__(self):
+        self.instance = None
+        self._dereferenced = False
+        return self
+
+    def __setstate__(self, state):
+        self = state
+        return self
+
+    def clear(self, *args, **kwargs):
+        self._mark_as_changed()
+        return super(BaseDict, self).clear()
+
+    def pop(self, *args, **kwargs):
+        self._mark_as_changed()
+        return super(BaseDict, self).pop(*args, **kwargs)
+
+    def popitem(self, *args, **kwargs):
+        self._mark_as_changed()
+        return super(BaseDict, self).popitem()
+
+    def setdefault(self, *args, **kwargs):
+        self._mark_as_changed()
+        return super(BaseDict, self).setdefault(*args, **kwargs)
+
+    def update(self, *args, **kwargs):
+        self._mark_as_changed()
+        return super(BaseDict, self).update(*args, **kwargs)
+
+    def _mark_as_changed(self, key=None):
+        if hasattr(self._instance, '_mark_as_changed'):
+            if key:
+                self._instance._mark_as_changed('%s.%s' % (self._name, key))
+            else:
+                self._instance._mark_as_changed(self._name)
+
+
+class BaseList(list):
+    """A special list so we can watch any changes."""
+
+    _dereferenced = False
+    _instance = None
+    _name = None
+
+    def __init__(self, list_items, instance, name):
+        Document = _import_class('Document')
+        EmbeddedDocument = _import_class('EmbeddedDocument')
+
+        if isinstance(instance, (Document, EmbeddedDocument)):
+            self._instance = weakref.proxy(instance)
+        self._name = name
+        super(BaseList, self).__init__(list_items)
+
+    def __getitem__(self, key, *args, **kwargs):
+        value = super(BaseList, self).__getitem__(key)
+
+        EmbeddedDocument = _import_class('EmbeddedDocument')
+        if isinstance(value, EmbeddedDocument) and value._instance is None:
+            value._instance = self._instance
+        elif not isinstance(value, BaseDict) and isinstance(value, dict):
+            value = BaseDict(value, None, '%s.%s' % (self._name, key))
+            super(BaseList, self).__setitem__(key, value)
+            value._instance = self._instance
+        elif not isinstance(value, BaseList) and isinstance(value, list):
+            value = BaseList(value, None, '%s.%s' % (self._name, key))
+            super(BaseList, self).__setitem__(key, value)
+            value._instance = self._instance
+        return value
+
+    def __iter__(self):
+        for i in six.moves.range(self.__len__()):
+            yield self[i]
+
+    def __setitem__(self, key, value, *args, **kwargs):
+        if isinstance(key, slice):
+            self._mark_as_changed()
+        else:
+            self._mark_as_changed(key)
+        return super(BaseList, self).__setitem__(key, value)
+
+    def __delitem__(self, key, *args, **kwargs):
+        self._mark_as_changed()
+        return super(BaseList, self).__delitem__(key)
+
+    def __setslice__(self, *args, **kwargs):
+        self._mark_as_changed()
+        return super(BaseList, self).__setslice__(*args, **kwargs)
+
+    def __delslice__(self, *args, **kwargs):
+        self._mark_as_changed()
+        return super(BaseList, self).__delslice__(*args, **kwargs)
+
+    def __getstate__(self):
+        self.instance = None
+        self._dereferenced = False
+        return self
+
+    def __setstate__(self, state):
+        self = state
+        return self
+
+    def __iadd__(self, other):
+        self._mark_as_changed()
+        return super(BaseList, self).__iadd__(other)
+
+    def __imul__(self, other):
+        self._mark_as_changed()
+        return super(BaseList, self).__imul__(other)
+
+    def append(self, *args, **kwargs):
+        self._mark_as_changed()
+        return super(BaseList, self).append(*args, **kwargs)
+
+    def extend(self, *args, **kwargs):
+        self._mark_as_changed()
+        return super(BaseList, self).extend(*args, **kwargs)
+
+    def insert(self, *args, **kwargs):
+        self._mark_as_changed()
+        return super(BaseList, self).insert(*args, **kwargs)
+
+    def pop(self, *args, **kwargs):
+        self._mark_as_changed()
+        return super(BaseList, self).pop(*args, **kwargs)
+
+    def remove(self, *args, **kwargs):
+        self._mark_as_changed()
+        return super(BaseList, self).remove(*args, **kwargs)
+
+    def reverse(self, *args, **kwargs):
+        self._mark_as_changed()
+        return super(BaseList, self).reverse()
+
+    def sort(self, *args, **kwargs):
+        self._mark_as_changed()
+        return super(BaseList, self).sort(*args, **kwargs)
+
+    def _mark_as_changed(self, key=None):
+        if hasattr(self._instance, '_mark_as_changed'):
+            if key:
+                self._instance._mark_as_changed(
+                    '%s.%s' % (self._name, key % len(self))
+                )
+            else:
+                self._instance._mark_as_changed(self._name)
+
+
+class EmbeddedDocumentList(BaseList):
+
+    @classmethod
+    def __match_all(cls, embedded_doc, kwargs):
+        """Return True if a given embedded doc matches all the filter
+        kwargs. If it doesn't return False.
+        """
+        for key, expected_value in kwargs.items():
+            doc_val = getattr(embedded_doc, key)
+            if doc_val != expected_value and six.text_type(doc_val) != expected_value:
+                return False
+        return True
+
+    @classmethod
+    def __only_matches(cls, embedded_docs, kwargs):
+        """Return embedded docs that match the filter kwargs."""
+        if not kwargs:
+            return embedded_docs
+        return [doc for doc in embedded_docs if cls.__match_all(doc, kwargs)]
+
+    def __init__(self, list_items, instance, name):
+        super(EmbeddedDocumentList, self).__init__(list_items, instance, name)
+        self._instance = instance
+
+    def filter(self, **kwargs):
+        """
+        Filters the list by only including embedded documents with the
+        given keyword arguments.
+
+        :param kwargs: The keyword arguments corresponding to the fields to
+         filter on. *Multiple arguments are treated as if they are ANDed
+         together.*
+        :return: A new ``EmbeddedDocumentList`` containing the matching
+         embedded documents.
+
+        Raises ``AttributeError`` if a given keyword is not a valid field for
+        the embedded document class.
+        """
+        values = self.__only_matches(self, kwargs)
+        return EmbeddedDocumentList(values, self._instance, self._name)
+
+    def exclude(self, **kwargs):
+        """
+        Filters the list by excluding embedded documents with the given
+        keyword arguments.
+
+        :param kwargs: The keyword arguments corresponding to the fields to
+         exclude on. *Multiple arguments are treated as if they are ANDed
+         together.*
+        :return: A new ``EmbeddedDocumentList`` containing the non-matching
+         embedded documents.
+
+        Raises ``AttributeError`` if a given keyword is not a valid field for
+        the embedded document class.
+        """
+        exclude = self.__only_matches(self, kwargs)
+        values = [item for item in self if item not in exclude]
+        return EmbeddedDocumentList(values, self._instance, self._name)
+
+    def count(self):
+        """
+        The number of embedded documents in the list.
+
+        :return: The length of the list, equivalent to the result of ``len()``.
+        """
+        return len(self)
+
+    def get(self, **kwargs):
+        """
+        Retrieves an embedded document determined by the given keyword
+        arguments.
+
+        :param kwargs: The keyword arguments corresponding to the fields to
+         search on. *Multiple arguments are treated as if they are ANDed
+         together.*
+        :return: The embedded document matched by the given keyword arguments.
+
+        Raises ``DoesNotExist`` if the arguments used to query an embedded
+        document returns no results. ``MultipleObjectsReturned`` if more
+        than one result is returned.
+        """
+        values = self.__only_matches(self, kwargs)
+        if len(values) == 0:
+            raise DoesNotExist(
+                '%s matching query does not exist.' % self._name
+            )
+        elif len(values) > 1:
+            raise MultipleObjectsReturned(
+                '%d items returned, instead of 1' % len(values)
+            )
+
+        return values[0]
+
+    def first(self):
+        """Return the first embedded document in the list, or ``None``
+        if empty.
+        """
+        if len(self) > 0:
+            return self[0]
+
+    def create(self, **values):
+        """
+        Creates a new embedded document and saves it to the database.
+
+        .. note::
+            The embedded document changes are not automatically saved
+            to the database after calling this method.
+
+        :param values: A dictionary of values for the embedded document.
+        :return: The new embedded document instance.
+        """
+        name = self._name
+        EmbeddedClass = self._instance._fields[name].field.document_type_obj
+        self._instance[self._name].append(EmbeddedClass(**values))
+
+        return self._instance[self._name][-1]
+
+    def save(self, *args, **kwargs):
+        """
+        Saves the ancestor document.
+
+        :param args: Arguments passed up to the ancestor Document's save
+         method.
+        :param kwargs: Keyword arguments passed up to the ancestor Document's
+         save method.
+        """
+        self._instance.save(*args, **kwargs)
+
+    def delete(self):
+        """
+        Deletes the embedded documents from the database.
+
+        .. note::
+            The embedded document changes are not automatically saved
+            to the database after calling this method.
+
+        :return: The number of entries deleted.
+        """
+        values = list(self)
+        for item in values:
+            self._instance[self._name].remove(item)
+
+        return len(values)
+
+    def update(self, **update):
+        """
+        Updates the embedded documents with the given replacement values. This
+        function does not support mongoDB update operators such as ``inc__``.
+
+        .. note::
+            The embedded document changes are not automatically saved
+            to the database after calling this method.
+
+        :param update: A dictionary of update values to apply to each
+         embedded document.
+        :return: The number of entries updated.
+        """
+        if len(update) == 0:
+            return 0
+        values = list(self)
+        for item in values:
+            for k, v in update.items():
+                setattr(item, k, v)
+
+        return len(values)
+
+
+class StrictDict(object):
+    __slots__ = ()
+    _special_fields = set(['get', 'pop', 'iteritems', 'items', 'keys', 'create'])
+    _classes = {}
+
+    def __init__(self, **kwargs):
+        for k, v in kwargs.iteritems():
+            setattr(self, k, v)
+
+    def __getitem__(self, key):
+        key = '_reserved_' + key if key in self._special_fields else key
+        try:
+            return getattr(self, key)
+        except AttributeError:
+            raise KeyError(key)
+
+    def __setitem__(self, key, value):
+        key = '_reserved_' + key if key in self._special_fields else key
+        return setattr(self, key, value)
+
+    def __contains__(self, key):
+        return hasattr(self, key)
+
+    def get(self, key, default=None):
+        try:
+            return self[key]
+        except KeyError:
+            return default
+
+    def pop(self, key, default=None):
+        v = self.get(key, default)
+        try:
+            delattr(self, key)
+        except AttributeError:
+            pass
+        return v
+
+    def iteritems(self):
+        for key in self:
+            yield key, self[key]
+
+    def items(self):
+        return [(k, self[k]) for k in iter(self)]
+
+    def iterkeys(self):
+        return iter(self)
+
+    def keys(self):
+        return list(iter(self))
+
+    def __iter__(self):
+        return (key for key in self.__slots__ if hasattr(self, key))
+
+    def __len__(self):
+        return len(list(self.iteritems()))
+
+    def __eq__(self, other):
+        return self.items() == other.items()
+
+    def __ne__(self, other):
+        return self.items() != other.items()
+
+    @classmethod
+    def create(cls, allowed_keys):
+        allowed_keys_tuple = tuple(('_reserved_' + k if k in cls._special_fields else k) for k in allowed_keys)
+        allowed_keys = frozenset(allowed_keys_tuple)
+        if allowed_keys not in cls._classes:
+            class SpecificStrictDict(cls):
+                __slots__ = allowed_keys_tuple
+
+                def __repr__(self):
+                    return '{%s}' % ', '.join('"{0!s}": {1!r}'.format(k, v) for k, v in self.items())
+
+            cls._classes[allowed_keys] = SpecificStrictDict
+        return cls._classes[allowed_keys]
+
+
+class LazyReference(DBRef):
+    __slots__ = ('_cached_doc', 'passthrough', 'document_type')
+
+    def fetch(self, force=False):
+        if not self._cached_doc or force:
+            self._cached_doc = self.document_type.objects.get(pk=self.pk)
+            if not self._cached_doc:
+                raise DoesNotExist('Trying to dereference unknown document %s' % (self))
+        return self._cached_doc
+
+    @property
+    def pk(self):
+        return self.id
+
+    def __init__(self, document_type, pk, cached_doc=None, passthrough=False):
+        self.document_type = document_type
+        self._cached_doc = cached_doc
+        self.passthrough = passthrough
+        super(LazyReference, self).__init__(self.document_type._get_collection_name(), pk)
+
+    def __getitem__(self, name):
+        if not self.passthrough:
+            raise KeyError()
+        document = self.fetch()
+        return document[name]
+
+    def __getattr__(self, name):
+        if not object.__getattribute__(self, 'passthrough'):
+            raise AttributeError()
+        document = self.fetch()
+        try:
+            return document[name]
+        except KeyError:
+            raise AttributeError()
+
+    def __repr__(self):
+        return "<LazyReference(%s, %r)>" % (self.document_type, self.pk)

mongoengine/base/fields.py

@@ -0,0 +1,641 @@
+import operator
+import warnings
+import weakref
+
+from bson import DBRef, ObjectId, SON
+import pymongo
+import six
+
+from mongoengine.base.common import UPDATE_OPERATORS
+from mongoengine.base.datastructures import (BaseDict, BaseList,
+                                             EmbeddedDocumentList)
+from mongoengine.common import _import_class
+from mongoengine.errors import ValidationError
+
+
+__all__ = ('BaseField', 'ComplexBaseField', 'ObjectIdField',
+           'GeoJsonBaseField')
+
+
+class BaseField(object):
+    """A base class for fields in a MongoDB document. Instances of this class
+    may be added to subclasses of `Document` to define a document's schema.
+
+    .. versionchanged:: 0.5 - added verbose and help text
+    """
+    name = None
+    _geo_index = False
+    _auto_gen = False  # Call `generate` to generate a value
+    _auto_dereference = True
+
+    # These track each time a Field instance is created. Used to retain order.
+    # The auto_creation_counter is used for fields that MongoEngine implicitly
+    # creates, creation_counter is used for all user-specified fields.
+    creation_counter = 0
+    auto_creation_counter = -1
+
+    def __init__(self, db_field=None, name=None, required=False, default=None,
+                 unique=False, unique_with=None, primary_key=False,
+                 validation=None, choices=None, null=False, sparse=False,
+                 **kwargs):
+        """
+        :param db_field: The database field to store this field in
+            (defaults to the name of the field)
+        :param name: Deprecated - use db_field
+        :param required: If the field is required. Whether it has to have a
+            value or not. Defaults to False.
+        :param default: (optional) The default value for this field if no value
+            has been set (or if the value has been unset).  It can be a
+            callable.
+        :param unique: Is the field value unique or not.  Defaults to False.
+        :param unique_with: (optional) The other field this field should be
+            unique with.
+        :param primary_key: Mark this field as the primary key. Defaults to False.
+        :param validation: (optional) A callable to validate the value of the
+            field.  Generally this is deprecated in favour of the
+            `FIELD.validate` method
+        :param choices: (optional) The valid choices
+        :param null: (optional) Is the field value can be null. If no and there is a default value
+            then the default value is set
+        :param sparse: (optional) `sparse=True` combined with `unique=True` and `required=False`
+            means that uniqueness won't be enforced for `None` values
+        :param **kwargs: (optional) Arbitrary indirection-free metadata for
+            this field can be supplied as additional keyword arguments and
+            accessed as attributes of the field. Must not conflict with any
+            existing attributes. Common metadata includes `verbose_name` and
+            `help_text`.
+        """
+        self.db_field = (db_field or name) if not primary_key else '_id'
+
+        if name:
+            msg = 'Field\'s "name" attribute deprecated in favour of "db_field"'
+            warnings.warn(msg, DeprecationWarning)
+        self.required = required or primary_key
+        self.default = default
+        self.unique = bool(unique or unique_with)
+        self.unique_with = unique_with
+        self.primary_key = primary_key
+        self.validation = validation
+        self.choices = choices
+        self.null = null
+        self.sparse = sparse
+        self._owner_document = None
+
+        # Make sure db_field is a string (if it's explicitly defined).
+        if (
+            self.db_field is not None and
+            not isinstance(self.db_field, six.string_types)
+        ):
+            raise TypeError('db_field should be a string.')
+
+        # Make sure db_field doesn't contain any forbidden characters.
+        if isinstance(self.db_field, six.string_types) and (
+            '.' in self.db_field or
+            '\0' in self.db_field or
+            self.db_field.startswith('$')
+        ):
+            raise ValueError(
+                'field names cannot contain dots (".") or null characters '
+                '("\\0"), and they must not start with a dollar sign ("$").'
+            )
+
+        # Detect and report conflicts between metadata and base properties.
+        conflicts = set(dir(self)) & set(kwargs)
+        if conflicts:
+            raise TypeError('%s already has attribute(s): %s' % (
+                self.__class__.__name__, ', '.join(conflicts)))
+
+        # Assign metadata to the instance
+        # This efficient method is available because no __slots__ are defined.
+        self.__dict__.update(kwargs)
+
+        # Adjust the appropriate creation counter, and save our local copy.
+        if self.db_field == '_id':
+            self.creation_counter = BaseField.auto_creation_counter
+            BaseField.auto_creation_counter -= 1
+        else:
+            self.creation_counter = BaseField.creation_counter
+            BaseField.creation_counter += 1
+
+    def __get__(self, instance, owner):
+        """Descriptor for retrieving a value from a field in a document.
+        """
+        if instance is None:
+            # Document class being used rather than a document object
+            return self
+
+        # Get value from document instance if available
+        return instance._data.get(self.name)
+
+    def __set__(self, instance, value):
+        """Descriptor for assigning a value to a field in a document.
+        """
+
+        # If setting to None and there is a default
+        # Then set the value to the default value
+        if value is None:
+            if self.null:
+                value = None
+            elif self.default is not None:
+                value = self.default
+                if callable(value):
+                    value = value()
+
+        if instance._initialised:
+            try:
+                if (self.name not in instance._data or
+                        instance._data[self.name] != value):
+                    instance._mark_as_changed(self.name)
+            except Exception:
+                # Values cant be compared eg: naive and tz datetimes
+                # So mark it as changed
+                instance._mark_as_changed(self.name)
+
+        EmbeddedDocument = _import_class('EmbeddedDocument')
+        if isinstance(value, EmbeddedDocument):
+            value._instance = weakref.proxy(instance)
+        elif isinstance(value, (list, tuple)):
+            for v in value:
+                if isinstance(v, EmbeddedDocument):
+                    v._instance = weakref.proxy(instance)
+        instance._data[self.name] = value
+
+    def error(self, message='', errors=None, field_name=None):
+        """Raise a ValidationError."""
+        field_name = field_name if field_name else self.name
+        raise ValidationError(message, errors=errors, field_name=field_name)
+
+    def to_python(self, value):
+        """Convert a MongoDB-compatible type to a Python type."""
+        return value
+
+    def to_mongo(self, value):
+        """Convert a Python type to a MongoDB-compatible type."""
+        return self.to_python(value)
+
+    def _to_mongo_safe_call(self, value, use_db_field=True, fields=None):
+        """Helper method to call to_mongo with proper inputs."""
+        f_inputs = self.to_mongo.__code__.co_varnames
+        ex_vars = {}
+        if 'fields' in f_inputs:
+            ex_vars['fields'] = fields
+
+        if 'use_db_field' in f_inputs:
+            ex_vars['use_db_field'] = use_db_field
+
+        return self.to_mongo(value, **ex_vars)
+
+    def prepare_query_value(self, op, value):
+        """Prepare a value that is being used in a query for PyMongo."""
+        if op in UPDATE_OPERATORS:
+            self.validate(value)
+        return value
+
+    def validate(self, value, clean=True):
+        """Perform validation on a value."""
+        pass
+
+    def _validate_choices(self, value):
+        Document = _import_class('Document')
+        EmbeddedDocument = _import_class('EmbeddedDocument')
+
+        choice_list = self.choices
+        if isinstance(next(iter(choice_list)), (list, tuple)):
+            # next(iter) is useful for sets
+            choice_list = [k for k, _ in choice_list]
+
+        # Choices which are other types of Documents
+        if isinstance(value, (Document, EmbeddedDocument)):
+            if not any(isinstance(value, c) for c in choice_list):
+                self.error(
+                    'Value must be an instance of %s' % (
+                        six.text_type(choice_list)
+                    )
+                )
+        # Choices which are types other than Documents
+        else:
+            values = value if isinstance(value, (list, tuple)) else [value]
+            if len(set(values) - set(choice_list)):
+                self.error('Value must be one of %s' % six.text_type(choice_list))
+
+    def _validate(self, value, **kwargs):
+        # Check the Choices Constraint
+        if self.choices:
+            self._validate_choices(value)
+
+        # check validation argument
+        if self.validation is not None:
+            if callable(self.validation):
+                if not self.validation(value):
+                    self.error('Value does not match custom validation method')
+            else:
+                raise ValueError('validation argument for "%s" must be a '
+                                 'callable.' % self.name)
+
+        self.validate(value, **kwargs)
+
+    @property
+    def owner_document(self):
+        return self._owner_document
+
+    def _set_owner_document(self, owner_document):
+        self._owner_document = owner_document
+
+    @owner_document.setter
+    def owner_document(self, owner_document):
+        self._set_owner_document(owner_document)
+
+
+class ComplexBaseField(BaseField):
+    """Handles complex fields, such as lists / dictionaries.
+
+    Allows for nesting of embedded documents inside complex types.
+    Handles the lazy dereferencing of a queryset by lazily dereferencing all
+    items in a list / dict rather than one at a time.
+
+    .. versionadded:: 0.5
+    """
+
+    field = None
+
+    def __get__(self, instance, owner):
+        """Descriptor to automatically dereference references."""
+        if instance is None:
+            # Document class being used rather than a document object
+            return self
+
+        ReferenceField = _import_class('ReferenceField')
+        GenericReferenceField = _import_class('GenericReferenceField')
+        EmbeddedDocumentListField = _import_class('EmbeddedDocumentListField')
+        dereference = (self._auto_dereference and
+                       (self.field is None or isinstance(self.field,
+                                                         (GenericReferenceField, ReferenceField))))
+
+        _dereference = _import_class('DeReference')()
+
+        self._auto_dereference = instance._fields[self.name]._auto_dereference
+        if instance._initialised and dereference and instance._data.get(self.name):
+            instance._data[self.name] = _dereference(
+                instance._data.get(self.name), max_depth=1, instance=instance,
+                name=self.name
+            )
+
+        value = super(ComplexBaseField, self).__get__(instance, owner)
+
+        # Convert lists / values so we can watch for any changes on them
+        if isinstance(value, (list, tuple)):
+            if (issubclass(type(self), EmbeddedDocumentListField) and
+                    not isinstance(value, EmbeddedDocumentList)):
+                value = EmbeddedDocumentList(value, instance, self.name)
+            elif not isinstance(value, BaseList):
+                value = BaseList(value, instance, self.name)
+            instance._data[self.name] = value
+        elif isinstance(value, dict) and not isinstance(value, BaseDict):
+            value = BaseDict(value, instance, self.name)
+            instance._data[self.name] = value
+
+        if (self._auto_dereference and instance._initialised and
+                isinstance(value, (BaseList, BaseDict)) and
+                not value._dereferenced):
+            value = _dereference(
+                value, max_depth=1, instance=instance, name=self.name
+            )
+            value._dereferenced = True
+            instance._data[self.name] = value
+
+        return value
+
+    def to_python(self, value):
+        """Convert a MongoDB-compatible type to a Python type."""
+        if isinstance(value, six.string_types):
+            return value
+
+        if hasattr(value, 'to_python'):
+            return value.to_python()
+
+        is_list = False
+        if not hasattr(value, 'items'):
+            try:
+                is_list = True
+                value = {k: v for k, v in enumerate(value)}
+            except TypeError:  # Not iterable return the value
+                return value
+
+        if self.field:
+            self.field._auto_dereference = self._auto_dereference
+            value_dict = {key: self.field.to_python(item)
+                          for key, item in value.items()}
+        else:
+            Document = _import_class('Document')
+            value_dict = {}
+            for k, v in value.items():
+                if isinstance(v, Document):
+                    # We need the id from the saved object to create the DBRef
+                    if v.pk is None:
+                        self.error('You can only reference documents once they'
+                                   ' have been saved to the database')
+                    collection = v._get_collection_name()
+                    value_dict[k] = DBRef(collection, v.pk)
+                elif hasattr(v, 'to_python'):
+                    value_dict[k] = v.to_python()
+                else:
+                    value_dict[k] = self.to_python(v)
+
+        if is_list:  # Convert back to a list
+            return [v for _, v in sorted(value_dict.items(),
+                                         key=operator.itemgetter(0))]
+        return value_dict
+
+    def to_mongo(self, value, use_db_field=True, fields=None):
+        """Convert a Python type to a MongoDB-compatible type."""
+        Document = _import_class('Document')
+        EmbeddedDocument = _import_class('EmbeddedDocument')
+        GenericReferenceField = _import_class('GenericReferenceField')
+
+        if isinstance(value, six.string_types):
+            return value
+
+        if hasattr(value, 'to_mongo'):
+            if isinstance(value, Document):
+                return GenericReferenceField().to_mongo(value)
+            cls = value.__class__
+            val = value.to_mongo(use_db_field, fields)
+            # If it's a document that is not inherited add _cls
+            if isinstance(value, EmbeddedDocument):
+                val['_cls'] = cls.__name__
+            return val
+
+        is_list = False
+        if not hasattr(value, 'items'):
+            try:
+                is_list = True
+                value = {k: v for k, v in enumerate(value)}
+            except TypeError:  # Not iterable return the value
+                return value
+
+        if self.field:
+            value_dict = {
+                key: self.field._to_mongo_safe_call(item, use_db_field, fields)
+                for key, item in value.iteritems()
+            }
+        else:
+            value_dict = {}
+            for k, v in value.iteritems():
+                if isinstance(v, Document):
+                    # We need the id from the saved object to create the DBRef
+                    if v.pk is None:
+                        self.error('You can only reference documents once they'
+                                   ' have been saved to the database')
+
+                    # If its a document that is not inheritable it won't have
+                    # any _cls data so make it a generic reference allows
+                    # us to dereference
+                    meta = getattr(v, '_meta', {})
+                    allow_inheritance = meta.get('allow_inheritance')
+                    if not allow_inheritance and not self.field:
+                        value_dict[k] = GenericReferenceField().to_mongo(v)
+                    else:
+                        collection = v._get_collection_name()
+                        value_dict[k] = DBRef(collection, v.pk)
+                elif hasattr(v, 'to_mongo'):
+                    cls = v.__class__
+                    val = v.to_mongo(use_db_field, fields)
+                    # If it's a document that is not inherited add _cls
+                    if isinstance(v, (Document, EmbeddedDocument)):
+                        val['_cls'] = cls.__name__
+                    value_dict[k] = val
+                else:
+                    value_dict[k] = self.to_mongo(v, use_db_field, fields)
+
+        if is_list:  # Convert back to a list
+            return [v for _, v in sorted(value_dict.items(),
+                                         key=operator.itemgetter(0))]
+        return value_dict
+
+    def validate(self, value):
+        """If field is provided ensure the value is valid."""
+        errors = {}
+        if self.field:
+            if hasattr(value, 'iteritems') or hasattr(value, 'items'):
+                sequence = value.iteritems()
+            else:
+                sequence = enumerate(value)
+            for k, v in sequence:
+                try:
+                    self.field._validate(v)
+                except ValidationError as error:
+                    errors[k] = error.errors or error
+                except (ValueError, AssertionError) as error:
+                    errors[k] = error
+
+            if errors:
+                field_class = self.field.__class__.__name__
+                self.error('Invalid %s item (%s)' % (field_class, value),
+                           errors=errors)
+        # Don't allow empty values if required
+        if self.required and not value:
+            self.error('Field is required and cannot be empty')
+
+    def prepare_query_value(self, op, value):
+        return self.to_mongo(value)
+
+    def lookup_member(self, member_name):
+        if self.field:
+            return self.field.lookup_member(member_name)
+        return None
+
+    def _set_owner_document(self, owner_document):
+        if self.field:
+            self.field.owner_document = owner_document
+        self._owner_document = owner_document
+
+
+class ObjectIdField(BaseField):
+    """A field wrapper around MongoDB's ObjectIds."""
+
+    def to_python(self, value):
+        try:
+            if not isinstance(value, ObjectId):
+                value = ObjectId(value)
+        except Exception:
+            pass
+        return value
+
+    def to_mongo(self, value):
+        if not isinstance(value, ObjectId):
+            try:
+                return ObjectId(six.text_type(value))
+            except Exception as e:
+                # e.message attribute has been deprecated since Python 2.6
+                self.error(six.text_type(e))
+        return value
+
+    def prepare_query_value(self, op, value):
+        return self.to_mongo(value)
+
+    def validate(self, value):
+        try:
+            ObjectId(six.text_type(value))
+        except Exception:
+            self.error('Invalid Object ID')
+
+
+class GeoJsonBaseField(BaseField):
+    """A geo json field storing a geojson style object.
+
+    .. versionadded:: 0.8
+    """
+
+    _geo_index = pymongo.GEOSPHERE
+    _type = 'GeoBase'
+
+    def __init__(self, auto_index=True, *args, **kwargs):
+        """
+        :param bool auto_index: Automatically create a '2dsphere' index.\
+            Defaults to `True`.
+        """
+        self._name = '%sField' % self._type
+        if not auto_index:
+            self._geo_index = False
+        super(GeoJsonBaseField, self).__init__(*args, **kwargs)
+
+    def validate(self, value):
+        """Validate the GeoJson object based on its type."""
+        if isinstance(value, dict):
+            if set(value.keys()) == set(['type', 'coordinates']):
+                if value['type'] != self._type:
+                    self.error('%s type must be "%s"' %
+                               (self._name, self._type))
+                return self.validate(value['coordinates'])
+            else:
+                self.error('%s can only accept a valid GeoJson dictionary'
+                           ' or lists of (x, y)' % self._name)
+                return
+        elif not isinstance(value, (list, tuple)):
+            self.error('%s can only accept lists of [x, y]' % self._name)
+            return
+
+        validate = getattr(self, '_validate_%s' % self._type.lower())
+        error = validate(value)
+        if error:
+            self.error(error)
+
+    def _validate_polygon(self, value, top_level=True):
+        if not isinstance(value, (list, tuple)):
+            return 'Polygons must contain list of linestrings'
+
+        # Quick and dirty validator
+        try:
+            value[0][0][0]
+        except (TypeError, IndexError):
+            return 'Invalid Polygon must contain at least one valid linestring'
+
+        errors = []
+        for val in value:
+            error = self._validate_linestring(val, False)
+            if not error and val[0] != val[-1]:
+                error = 'LineStrings must start and end at the same point'
+            if error and error not in errors:
+                errors.append(error)
+        if errors:
+            if top_level:
+                return 'Invalid Polygon:\n%s' % ', '.join(errors)
+            else:
+                return '%s' % ', '.join(errors)
+
+    def _validate_linestring(self, value, top_level=True):
+        """Validate a linestring."""
+        if not isinstance(value, (list, tuple)):
+            return 'LineStrings must contain list of coordinate pairs'
+
+        # Quick and dirty validator
+        try:
+            value[0][0]
+        except (TypeError, IndexError):
+            return 'Invalid LineString must contain at least one valid point'
+
+        errors = []
+        for val in value:
+            error = self._validate_point(val)
+            if error and error not in errors:
+                errors.append(error)
+        if errors:
+            if top_level:
+                return 'Invalid LineString:\n%s' % ', '.join(errors)
+            else:
+                return '%s' % ', '.join(errors)
+
+    def _validate_point(self, value):
+        """Validate each set of coords"""
+        if not isinstance(value, (list, tuple)):
+            return 'Points must be a list of coordinate pairs'
+        elif not len(value) == 2:
+            return 'Value (%s) must be a two-dimensional point' % repr(value)
+        elif (not isinstance(value[0], (float, int)) or
+              not isinstance(value[1], (float, int))):
+            return 'Both values (%s) in point must be float or int' % repr(value)
+
+    def _validate_multipoint(self, value):
+        if not isinstance(value, (list, tuple)):
+            return 'MultiPoint must be a list of Point'
+
+        # Quick and dirty validator
+        try:
+            value[0][0]
+        except (TypeError, IndexError):
+            return 'Invalid MultiPoint must contain at least one valid point'
+
+        errors = []
+        for point in value:
+            error = self._validate_point(point)
+            if error and error not in errors:
+                errors.append(error)
+
+        if errors:
+            return '%s' % ', '.join(errors)
+
+    def _validate_multilinestring(self, value, top_level=True):
+        if not isinstance(value, (list, tuple)):
+            return 'MultiLineString must be a list of LineString'
+
+        # Quick and dirty validator
+        try:
+            value[0][0][0]
+        except (TypeError, IndexError):
+            return 'Invalid MultiLineString must contain at least one valid linestring'
+
+        errors = []
+        for linestring in value:
+            error = self._validate_linestring(linestring, False)
+            if error and error not in errors:
+                errors.append(error)
+
+        if errors:
+            if top_level:
+                return 'Invalid MultiLineString:\n%s' % ', '.join(errors)
+            else:
+                return '%s' % ', '.join(errors)
+
+    def _validate_multipolygon(self, value):
+        if not isinstance(value, (list, tuple)):
+            return 'MultiPolygon must be a list of Polygon'
+
+        # Quick and dirty validator
+        try:
+            value[0][0][0][0]
+        except (TypeError, IndexError):
+            return 'Invalid MultiPolygon must contain at least one valid Polygon'
+
+        errors = []
+        for polygon in value:
+            error = self._validate_polygon(polygon, False)
+            if error and error not in errors:
+                errors.append(error)
+
+        if errors:
+            return 'Invalid MultiPolygon:\n%s' % ', '.join(errors)
+
+    def to_mongo(self, value):
+        if isinstance(value, dict):
+            return value
+        return SON([('type', self._type), ('coordinates', value)])

mongoengine/base/metaclasses.py

@@ -0,0 +1,452 @@
+import warnings
+
+import six
+
+from mongoengine.base.common import _document_registry
+from mongoengine.base.fields import BaseField, ComplexBaseField, ObjectIdField
+from mongoengine.common import _import_class
+from mongoengine.errors import InvalidDocumentError
+from mongoengine.queryset import (DO_NOTHING, DoesNotExist,
+                                  MultipleObjectsReturned,
+                                  QuerySetManager)
+
+
+__all__ = ('DocumentMetaclass', 'TopLevelDocumentMetaclass')
+
+
+class DocumentMetaclass(type):
+    """Metaclass for all documents."""
+
+    # TODO lower complexity of this method
+    def __new__(cls, name, bases, attrs):
+        flattened_bases = cls._get_bases(bases)
+        super_new = super(DocumentMetaclass, cls).__new__
+
+        # If a base class just call super
+        metaclass = attrs.get('my_metaclass')
+        if metaclass and issubclass(metaclass, DocumentMetaclass):
+            return super_new(cls, name, bases, attrs)
+
+        attrs['_is_document'] = attrs.get('_is_document', False)
+        attrs['_cached_reference_fields'] = []
+
+        # EmbeddedDocuments could have meta data for inheritance
+        if 'meta' in attrs:
+            attrs['_meta'] = attrs.pop('meta')
+
+        # EmbeddedDocuments should inherit meta data
+        if '_meta' not in attrs:
+            meta = MetaDict()
+            for base in flattened_bases[::-1]:
+                # Add any mixin metadata from plain objects
+                if hasattr(base, 'meta'):
+                    meta.merge(base.meta)
+                elif hasattr(base, '_meta'):
+                    meta.merge(base._meta)
+            attrs['_meta'] = meta
+            attrs['_meta']['abstract'] = False  # 789: EmbeddedDocument shouldn't inherit abstract
+
+        # If allow_inheritance is True, add a "_cls" string field to the attrs
+        if attrs['_meta'].get('allow_inheritance'):
+            StringField = _import_class('StringField')
+            attrs['_cls'] = StringField()
+
+        # Handle document Fields
+
+        # Merge all fields from subclasses
+        doc_fields = {}
+        for base in flattened_bases[::-1]:
+            if hasattr(base, '_fields'):
+                doc_fields.update(base._fields)
+
+            # Standard object mixin - merge in any Fields
+            if not hasattr(base, '_meta'):
+                base_fields = {}
+                for attr_name, attr_value in base.__dict__.iteritems():
+                    if not isinstance(attr_value, BaseField):
+                        continue
+                    attr_value.name = attr_name
+                    if not attr_value.db_field:
+                        attr_value.db_field = attr_name
+                    base_fields[attr_name] = attr_value
+
+                doc_fields.update(base_fields)
+
+        # Discover any document fields
+        field_names = {}
+        for attr_name, attr_value in attrs.iteritems():
+            if not isinstance(attr_value, BaseField):
+                continue
+            attr_value.name = attr_name
+            if not attr_value.db_field:
+                attr_value.db_field = attr_name
+            doc_fields[attr_name] = attr_value
+
+            # Count names to ensure no db_field redefinitions
+            field_names[attr_value.db_field] = field_names.get(
+                attr_value.db_field, 0) + 1
+
+        # Ensure no duplicate db_fields
+        duplicate_db_fields = [k for k, v in field_names.items() if v > 1]
+        if duplicate_db_fields:
+            msg = ('Multiple db_fields defined for: %s ' %
+                   ', '.join(duplicate_db_fields))
+            raise InvalidDocumentError(msg)
+
+        # Set _fields and db_field maps
+        attrs['_fields'] = doc_fields
+        attrs['_db_field_map'] = {k: getattr(v, 'db_field', k)
+                                  for k, v in doc_fields.items()}
+        attrs['_reverse_db_field_map'] = {
+            v: k for k, v in attrs['_db_field_map'].items()
+        }
+
+        attrs['_fields_ordered'] = tuple(i[1] for i in sorted(
+                                         (v.creation_counter, v.name)
+                                         for v in doc_fields.itervalues()))
+
+        #
+        # Set document hierarchy
+        #
+        superclasses = ()
+        class_name = [name]
+        for base in flattened_bases:
+            if (not getattr(base, '_is_base_cls', True) and
+                    not getattr(base, '_meta', {}).get('abstract', True)):
+                # Collate hierarchy for _cls and _subclasses
+                class_name.append(base.__name__)
+
+            if hasattr(base, '_meta'):
+                # Warn if allow_inheritance isn't set and prevent
+                # inheritance of classes where inheritance is set to False
+                allow_inheritance = base._meta.get('allow_inheritance')
+                if not allow_inheritance and not base._meta.get('abstract'):
+                    raise ValueError('Document %s may not be subclassed' %
+                                     base.__name__)
+
+        # Get superclasses from last base superclass
+        document_bases = [b for b in flattened_bases
+                          if hasattr(b, '_class_name')]
+        if document_bases:
+            superclasses = document_bases[0]._superclasses
+            superclasses += (document_bases[0]._class_name, )
+
+        _cls = '.'.join(reversed(class_name))
+        attrs['_class_name'] = _cls
+        attrs['_superclasses'] = superclasses
+        attrs['_subclasses'] = (_cls, )
+        attrs['_types'] = attrs['_subclasses']  # TODO depreciate _types
+
+        # Create the new_class
+        new_class = super_new(cls, name, bases, attrs)
+
+        # Set _subclasses
+        for base in document_bases:
+            if _cls not in base._subclasses:
+                base._subclasses += (_cls,)
+            base._types = base._subclasses  # TODO depreciate _types
+
+        (Document, EmbeddedDocument, DictField,
+         CachedReferenceField) = cls._import_classes()
+
+        if issubclass(new_class, Document):
+            new_class._collection = None
+
+        # Add class to the _document_registry
+        _document_registry[new_class._class_name] = new_class
+
+        # In Python 2, User-defined methods objects have special read-only
+        # attributes 'im_func' and 'im_self' which contain the function obj
+        # and class instance object respectively.  With Python 3 these special
+        # attributes have been replaced by __func__ and __self__.  The Blinker
+        # module continues to use im_func and im_self, so the code below
+        # copies __func__ into im_func and __self__ into im_self for
+        # classmethod objects in Document derived classes.
+        if six.PY3:
+            for val in new_class.__dict__.values():
+                if isinstance(val, classmethod):
+                    f = val.__get__(new_class)
+                    if hasattr(f, '__func__') and not hasattr(f, 'im_func'):
+                        f.__dict__.update({'im_func': getattr(f, '__func__')})
+                    if hasattr(f, '__self__') and not hasattr(f, 'im_self'):
+                        f.__dict__.update({'im_self': getattr(f, '__self__')})
+
+        # Handle delete rules
+        for field in new_class._fields.itervalues():
+            f = field
+            if f.owner_document is None:
+                f.owner_document = new_class
+            delete_rule = getattr(f, 'reverse_delete_rule', DO_NOTHING)
+            if isinstance(f, CachedReferenceField):
+
+                if issubclass(new_class, EmbeddedDocument):
+                    raise InvalidDocumentError('CachedReferenceFields is not '
+                                               'allowed in EmbeddedDocuments')
+                if not f.document_type:
+                    raise InvalidDocumentError(
+                        'Document is not available to sync')
+
+                if f.auto_sync:
+                    f.start_listener()
+
+                f.document_type._cached_reference_fields.append(f)
+
+            if isinstance(f, ComplexBaseField) and hasattr(f, 'field'):
+                delete_rule = getattr(f.field,
+                                      'reverse_delete_rule',
+                                      DO_NOTHING)
+                if isinstance(f, DictField) and delete_rule != DO_NOTHING:
+                    msg = ('Reverse delete rules are not supported '
+                           'for %s (field: %s)' %
+                           (field.__class__.__name__, field.name))
+                    raise InvalidDocumentError(msg)
+
+                f = field.field
+
+            if delete_rule != DO_NOTHING:
+                if issubclass(new_class, EmbeddedDocument):
+                    msg = ('Reverse delete rules are not supported for '
+                           'EmbeddedDocuments (field: %s)' % field.name)
+                    raise InvalidDocumentError(msg)
+                f.document_type.register_delete_rule(new_class,
+                                                     field.name, delete_rule)
+
+            if (field.name and hasattr(Document, field.name) and
+                    EmbeddedDocument not in new_class.mro()):
+                msg = ('%s is a document method and not a valid '
+                       'field name' % field.name)
+                raise InvalidDocumentError(msg)
+
+        return new_class
+
+    def add_to_class(self, name, value):
+        setattr(self, name, value)
+
+    @classmethod
+    def _get_bases(cls, bases):
+        if isinstance(bases, BasesTuple):
+            return bases
+        seen = []
+        bases = cls.__get_bases(bases)
+        unique_bases = (b for b in bases if not (b in seen or seen.append(b)))
+        return BasesTuple(unique_bases)
+
+    @classmethod
+    def __get_bases(cls, bases):
+        for base in bases:
+            if base is object:
+                continue
+            yield base
+            for child_base in cls.__get_bases(base.__bases__):
+                yield child_base
+
+    @classmethod
+    def _import_classes(cls):
+        Document = _import_class('Document')
+        EmbeddedDocument = _import_class('EmbeddedDocument')
+        DictField = _import_class('DictField')
+        CachedReferenceField = _import_class('CachedReferenceField')
+        return Document, EmbeddedDocument, DictField, CachedReferenceField
+
+
+class TopLevelDocumentMetaclass(DocumentMetaclass):
+    """Metaclass for top-level documents (i.e. documents that have their own
+    collection in the database.
+    """
+
+    def __new__(cls, name, bases, attrs):
+        flattened_bases = cls._get_bases(bases)
+        super_new = super(TopLevelDocumentMetaclass, cls).__new__
+
+        # Set default _meta data if base class, otherwise get user defined meta
+        if attrs.get('my_metaclass') == TopLevelDocumentMetaclass:
+            # defaults
+            attrs['_meta'] = {
+                'abstract': True,
+                'max_documents': None,
+                'max_size': None,
+                'ordering': [],  # default ordering applied at runtime
+                'indexes': [],  # indexes to be ensured at runtime
+                'id_field': None,
+                'index_background': False,
+                'index_drop_dups': False,
+                'index_opts': None,
+                'delete_rules': None,
+
+                # allow_inheritance can be True, False, and None. True means
+                # "allow inheritance", False means "don't allow inheritance",
+                # None means "do whatever your parent does, or don't allow
+                # inheritance if you're a top-level class".
+                'allow_inheritance': None,
+            }
+            attrs['_is_base_cls'] = True
+            attrs['_meta'].update(attrs.get('meta', {}))
+        else:
+            attrs['_meta'] = attrs.get('meta', {})
+            # Explicitly set abstract to false unless set
+            attrs['_meta']['abstract'] = attrs['_meta'].get('abstract', False)
+            attrs['_is_base_cls'] = False
+
+        # Set flag marking as document class - as opposed to an object mixin
+        attrs['_is_document'] = True
+
+        # Ensure queryset_class is inherited
+        if 'objects' in attrs:
+            manager = attrs['objects']
+            if hasattr(manager, 'queryset_class'):
+                attrs['_meta']['queryset_class'] = manager.queryset_class
+
+        # Clean up top level meta
+        if 'meta' in attrs:
+            del attrs['meta']
+
+        # Find the parent document class
+        parent_doc_cls = [b for b in flattened_bases
+                          if b.__class__ == TopLevelDocumentMetaclass]
+        parent_doc_cls = None if not parent_doc_cls else parent_doc_cls[0]
+
+        # Prevent classes setting collection different to their parents
+        # If parent wasn't an abstract class
+        if (parent_doc_cls and 'collection' in attrs.get('_meta', {}) and
+                not parent_doc_cls._meta.get('abstract', True)):
+            msg = 'Trying to set a collection on a subclass (%s)' % name
+            warnings.warn(msg, SyntaxWarning)
+            del attrs['_meta']['collection']
+
+        # Ensure abstract documents have abstract bases
+        if attrs.get('_is_base_cls') or attrs['_meta'].get('abstract'):
+            if (parent_doc_cls and
+                    not parent_doc_cls._meta.get('abstract', False)):
+                msg = 'Abstract document cannot have non-abstract base'
+                raise ValueError(msg)
+            return super_new(cls, name, bases, attrs)
+
+        # Merge base class metas.
+        # Uses a special MetaDict that handles various merging rules
+        meta = MetaDict()
+        for base in flattened_bases[::-1]:
+            # Add any mixin metadata from plain objects
+            if hasattr(base, 'meta'):
+                meta.merge(base.meta)
+            elif hasattr(base, '_meta'):
+                meta.merge(base._meta)
+
+            # Set collection in the meta if its callable
+            if (getattr(base, '_is_document', False) and
+                    not base._meta.get('abstract')):
+                collection = meta.get('collection', None)
+                if callable(collection):
+                    meta['collection'] = collection(base)
+
+        meta.merge(attrs.get('_meta', {}))  # Top level meta
+
+        # Only simple classes (i.e. direct subclasses of Document) may set
+        # allow_inheritance to False. If the base Document allows inheritance,
+        # none of its subclasses can override allow_inheritance to False.
+        simple_class = all([b._meta.get('abstract')
+                            for b in flattened_bases if hasattr(b, '_meta')])
+        if (
+            not simple_class and
+            meta['allow_inheritance'] is False and
+            not meta['abstract']
+        ):
+            raise ValueError('Only direct subclasses of Document may set '
+                             '"allow_inheritance" to False')
+
+        # Set default collection name
+        if 'collection' not in meta:
+            meta['collection'] = ''.join('_%s' % c if c.isupper() else c
+                                         for c in name).strip('_').lower()
+        attrs['_meta'] = meta
+
+        # Call super and get the new class
+        new_class = super_new(cls, name, bases, attrs)
+
+        meta = new_class._meta
+
+        # Set index specifications
+        meta['index_specs'] = new_class._build_index_specs(meta['indexes'])
+
+        # If collection is a callable - call it and set the value
+        collection = meta.get('collection')
+        if callable(collection):
+            new_class._meta['collection'] = collection(new_class)
+
+        # Provide a default queryset unless exists or one has been set
+        if 'objects' not in dir(new_class):
+            new_class.objects = QuerySetManager()
+
+        # Validate the fields and set primary key if needed
+        for field_name, field in new_class._fields.iteritems():
+            if field.primary_key:
+                # Ensure only one primary key is set
+                current_pk = new_class._meta.get('id_field')
+                if current_pk and current_pk != field_name:
+                    raise ValueError('Cannot override primary key field')
+
+                # Set primary key
+                if not current_pk:
+                    new_class._meta['id_field'] = field_name
+                    new_class.id = field
+
+        # Set primary key if not defined by the document
+        new_class._auto_id_field = getattr(parent_doc_cls,
+                                           '_auto_id_field', False)
+        if not new_class._meta.get('id_field'):
+            # After 0.10, find not existing names, instead of overwriting
+            id_name, id_db_name = cls.get_auto_id_names(new_class)
+            new_class._auto_id_field = True
+            new_class._meta['id_field'] = id_name
+            new_class._fields[id_name] = ObjectIdField(db_field=id_db_name)
+            new_class._fields[id_name].name = id_name
+            new_class.id = new_class._fields[id_name]
+            new_class._db_field_map[id_name] = id_db_name
+            new_class._reverse_db_field_map[id_db_name] = id_name
+            # Prepend id field to _fields_ordered
+            new_class._fields_ordered = (id_name, ) + new_class._fields_ordered
+
+        # Merge in exceptions with parent hierarchy
+        exceptions_to_merge = (DoesNotExist, MultipleObjectsReturned)
+        module = attrs.get('__module__')
+        for exc in exceptions_to_merge:
+            name = exc.__name__
+            parents = tuple(getattr(base, name) for base in flattened_bases
+                            if hasattr(base, name)) or (exc,)
+            # Create new exception and set to new_class
+            exception = type(name, parents, {'__module__': module})
+            setattr(new_class, name, exception)
+
+        return new_class
+
+    @classmethod
+    def get_auto_id_names(cls, new_class):
+        id_name, id_db_name = ('id', '_id')
+        if id_name not in new_class._fields and \
+                id_db_name not in (v.db_field for v in new_class._fields.values()):
+            return id_name, id_db_name
+        id_basename, id_db_basename, i = 'auto_id', '_auto_id', 0
+        while id_name in new_class._fields or \
+                id_db_name in (v.db_field for v in new_class._fields.values()):
+            id_name = '{0}_{1}'.format(id_basename, i)
+            id_db_name = '{0}_{1}'.format(id_db_basename, i)
+            i += 1
+        return id_name, id_db_name
+
+
+class MetaDict(dict):
+    """Custom dictionary for meta classes.
+    Handles the merging of set indexes
+    """
+    _merge_options = ('indexes',)
+
+    def merge(self, new_options):
+        for k, v in new_options.iteritems():
+            if k in self._merge_options:
+                self[k] = self.get(k, []) + v
+            else:
+                self[k] = v
+
+
+class BasesTuple(tuple):
+    """Special class to handle introspection of bases tuple in __new__"""
+    pass

mongoengine/common.py

@@ -0,0 +1,58 @@
+_class_registry_cache = {}
+_field_list_cache = []
+
+
+def _import_class(cls_name):
+    """Cache mechanism for imports.
+
+    Due to complications of circular imports mongoengine needs to do lots of
+    inline imports in functions.  This is inefficient as classes are
+    imported repeated throughout the mongoengine code.  This is
+    compounded by some recursive functions requiring inline imports.
+
+    :mod:`mongoengine.common` provides a single point to import all these
+    classes.  Circular imports aren't an issue as it dynamically imports the
+    class when first needed.  Subsequent calls to the
+    :func:`~mongoengine.common._import_class` can then directly retrieve the
+    class from the :data:`mongoengine.common._class_registry_cache`.
+    """
+    if cls_name in _class_registry_cache:
+        return _class_registry_cache.get(cls_name)
+
+    doc_classes = ('Document', 'DynamicEmbeddedDocument', 'EmbeddedDocument',
+                   'MapReduceDocument')
+
+    # Field Classes
+    if not _field_list_cache:
+        from mongoengine.fields import __all__ as fields
+        _field_list_cache.extend(fields)
+        from mongoengine.base.fields import __all__ as fields
+        _field_list_cache.extend(fields)
+
+    field_classes = _field_list_cache
+
+    queryset_classes = ('OperationError',)
+    deref_classes = ('DeReference',)
+
+    if cls_name == 'BaseDocument':
+        from mongoengine.base import document as module
+        import_classes = ['BaseDocument']
+    elif cls_name in doc_classes:
+        from mongoengine import document as module
+        import_classes = doc_classes
+    elif cls_name in field_classes:
+        from mongoengine import fields as module
+        import_classes = field_classes
+    elif cls_name in queryset_classes:
+        from mongoengine import queryset as module
+        import_classes = queryset_classes
+    elif cls_name in deref_classes:
+        from mongoengine import dereference as module
+        import_classes = deref_classes
+    else:
+        raise ValueError('No import set for: ' % cls_name)
+
+    for cls in import_classes:
+        _class_registry_cache[cls] = getattr(module, cls)
+
+    return _class_registry_cache.get(cls_name)

mongoengine/connection.py

@@ -1,15 +1,25 @@
-import pymongo
+from pymongo import MongoClient, ReadPreference, uri_parser
-from pymongo import Connection, ReplicaSetConnection, uri_parser
+import six
 
+from mongoengine.python_support import IS_PYMONGO_3
 
-__all__ = ['ConnectionError', 'connect', 'register_connection',
+__all__ = ['MongoEngineConnectionError', 'connect', 'register_connection',
            'DEFAULT_CONNECTION_NAME']
 
 
 DEFAULT_CONNECTION_NAME = 'default'
 
+if IS_PYMONGO_3:
+    READ_PREFERENCE = ReadPreference.PRIMARY
+else:
+    from pymongo import MongoReplicaSetClient
+    READ_PREFERENCE = False
 
-class ConnectionError(Exception):
+
+class MongoEngineConnectionError(Exception):
+    """Error raised when the database connection can't be established or
+    when a connection with a requested alias can't be retrieved.
+    """
     pass
 
 
@@ -18,132 +28,217 @@ _connections = {}
 _dbs = {}
 
 
-def register_connection(alias, name, host='localhost', port=27017,
+def register_connection(alias, db=None, name=None, host=None, port=None,
-                        is_slave=False, read_preference=False, slaves=None,
+                        read_preference=READ_PREFERENCE,
-                        username=None, password=None, **kwargs):
+                        username=None, password=None,
+                        authentication_source=None,
+                        authentication_mechanism=None,
+                        **kwargs):
     """Add a connection.
 
     :param alias: the name that will be used to refer to this connection
         throughout MongoEngine
     :param name: the name of the specific database to use
+    :param db: the name of the database to use, for compatibility with connect
     :param host: the host name of the :program:`mongod` instance to connect to
     :param port: the port that the :program:`mongod` instance is running on
-    :param is_slave: whether the connection can act as a slave ** Depreciated pymongo 2.0.1+
+    :param read_preference: The read preference for the collection
-    :param read_preference: The read preference for the collection ** Added pymongo 2.1
+       ** Added pymongo 2.1
-    :param slaves: a list of aliases of slave connections; each of these must
-        be a registered connection that has :attr:`is_slave` set to ``True``
     :param username: username to authenticate with
     :param password: password to authenticate with
-    :param kwargs: allow ad-hoc parameters to be passed into the pymongo driver
+    :param authentication_source: database to authenticate against
+    :param authentication_mechanism: database authentication mechanisms.
+        By default, use SCRAM-SHA-1 with MongoDB 3.0 and later,
+        MONGODB-CR (MongoDB Challenge Response protocol) for older servers.
+    :param is_mock: explicitly use mongomock for this connection
+        (can also be done by using `mongomock://` as db host prefix)
+    :param kwargs: ad-hoc parameters to be passed into the pymongo driver,
+        for example maxpoolsize, tz_aware, etc. See the documentation
+        for pymongo's `MongoClient` for a full list.
 
+    .. versionchanged:: 0.10.6 - added mongomock support
     """
-    global _connection_settings
-
     conn_settings = {
-        'name': name,
+        'name': name or db or 'test',
-        'host': host,
+        'host': host or 'localhost',
-        'port': port,
+        'port': port or 27017,
-        'is_slave': is_slave,
+        'read_preference': read_preference,
-        'slaves': slaves or [],
         'username': username,
         'password': password,
-        'read_preference': read_preference
+        'authentication_source': authentication_source,
+        'authentication_mechanism': authentication_mechanism
     }
 
-    # Handle uri style connections
+    conn_host = conn_settings['host']
-    if "://" in host:
+
-        uri_dict = uri_parser.parse_uri(host)
+    # Host can be a list or a string, so if string, force to a list.
-        if uri_dict.get('database') is None:
+    if isinstance(conn_host, six.string_types):
-            raise ConnectionError("If using URI style connection include "\
+        conn_host = [conn_host]
-                                  "database name in string")
+
-        conn_settings.update({
+    resolved_hosts = []
-            'host': host,
+    for entity in conn_host:
-            'name': uri_dict.get('database'),
+
-            'username': uri_dict.get('username'),
+        # Handle Mongomock
-            'password': uri_dict.get('password'),
+        if entity.startswith('mongomock://'):
-            'read_preference': read_preference,
+            conn_settings['is_mock'] = True
-        })
+            # `mongomock://` is not a valid url prefix and must be replaced by `mongodb://`
-        if "replicaSet" in host:
+            resolved_hosts.append(entity.replace('mongomock://', 'mongodb://', 1))
-            conn_settings['replicaSet'] = True
+
+        # Handle URI style connections, only updating connection params which
+        # were explicitly specified in the URI.
+        elif '://' in entity:
+            uri_dict = uri_parser.parse_uri(entity)
+            resolved_hosts.append(entity)
+
+            if uri_dict.get('database'):
+                conn_settings['name'] = uri_dict.get('database')
+
+            for param in ('read_preference', 'username', 'password'):
+                if uri_dict.get(param):
+                    conn_settings[param] = uri_dict[param]
+
+            uri_options = uri_dict['options']
+            if 'replicaset' in uri_options:
+                conn_settings['replicaSet'] = uri_options['replicaset']
+            if 'authsource' in uri_options:
+                conn_settings['authentication_source'] = uri_options['authsource']
+            if 'authmechanism' in uri_options:
+                conn_settings['authentication_mechanism'] = uri_options['authmechanism']
+        else:
+            resolved_hosts.append(entity)
+    conn_settings['host'] = resolved_hosts
+
+    # Deprecated parameters that should not be passed on
+    kwargs.pop('slaves', None)
+    kwargs.pop('is_slave', None)
 
     conn_settings.update(kwargs)
     _connection_settings[alias] = conn_settings
 
 
 def disconnect(alias=DEFAULT_CONNECTION_NAME):
-    global _connections
+    """Close the connection with a given alias."""
-    global _dbs
-
     if alias in _connections:
-        get_connection(alias=alias).disconnect()
+        get_connection(alias=alias).close()
         del _connections[alias]
     if alias in _dbs:
         del _dbs[alias]
 
 
 def get_connection(alias=DEFAULT_CONNECTION_NAME, reconnect=False):
-    global _connections
+    """Return a connection with a given alias."""
+
     # Connect to the database if not already connected
     if reconnect:
         disconnect(alias)
 
-    if alias not in _connections:
+    # If the requested alias already exists in the _connections list, return
+    # it immediately.
+    if alias in _connections:
+        return _connections[alias]
+
+    # Validate that the requested alias exists in the _connection_settings.
+    # Raise MongoEngineConnectionError if it doesn't.
     if alias not in _connection_settings:
-            msg = 'Connection with alias "%s" has not been defined' % alias
         if alias == DEFAULT_CONNECTION_NAME:
             msg = 'You have not defined a default connection'
-            raise ConnectionError(msg)
-        conn_settings = _connection_settings[alias].copy()
-
-        if hasattr(pymongo, 'version_tuple'):  # Support for 2.1+
-            conn_settings.pop('name', None)
-            conn_settings.pop('slaves', None)
-            conn_settings.pop('is_slave', None)
-            conn_settings.pop('username', None)
-            conn_settings.pop('password', None)
         else:
-            # Get all the slave connections
+            msg = 'Connection with alias "%s" has not been defined' % alias
-            if 'slaves' in conn_settings:
+        raise MongoEngineConnectionError(msg)
-                slaves = []
-                for slave_alias in conn_settings['slaves']:
-                    slaves.append(get_connection(slave_alias))
-                conn_settings['slaves'] = slaves
-                conn_settings.pop('read_preference', None)
 
-        connection_class = Connection
+    def _clean_settings(settings_dict):
-        if 'replicaSet' in conn_settings:
+        # set literal more efficient than calling set function
+        irrelevant_fields_set = {
+            'name', 'username', 'password',
+            'authentication_source', 'authentication_mechanism'
+        }
+        return {
+            k: v for k, v in settings_dict.items()
+            if k not in irrelevant_fields_set
+        }
+
+    # Retrieve a copy of the connection settings associated with the requested
+    # alias and remove the database name and authentication info (we don't
+    # care about them at this point).
+    conn_settings = _clean_settings(_connection_settings[alias].copy())
+
+    # Determine if we should use PyMongo's or mongomock's MongoClient.
+    is_mock = conn_settings.pop('is_mock', False)
+    if is_mock:
+        try:
+            import mongomock
+        except ImportError:
+            raise RuntimeError('You need mongomock installed to mock '
+                               'MongoEngine.')
+        connection_class = mongomock.MongoClient
+    else:
+        connection_class = MongoClient
+
+        # For replica set connections with PyMongo 2.x, use
+        # MongoReplicaSetClient.
+        # TODO remove this once we stop supporting PyMongo 2.x.
+        if 'replicaSet' in conn_settings and not IS_PYMONGO_3:
+            connection_class = MongoReplicaSetClient
             conn_settings['hosts_or_uri'] = conn_settings.pop('host', None)
-            # Discard port since it can't be used on ReplicaSetConnection
-            conn_settings.pop('port', None)
-            # Discard replicaSet if not base string
-            if not isinstance(conn_settings['replicaSet'], basestring):
-                conn_settings.pop('replicaSet', None)
-            connection_class = ReplicaSetConnection
 
+            # hosts_or_uri has to be a string, so if 'host' was provided
+            # as a list, join its parts and separate them by ','
+            if isinstance(conn_settings['hosts_or_uri'], list):
+                conn_settings['hosts_or_uri'] = ','.join(
+                    conn_settings['hosts_or_uri'])
+
+            # Discard port since it can't be used on MongoReplicaSetClient
+            conn_settings.pop('port', None)
+
+    # Iterate over all of the connection settings and if a connection with
+    # the same parameters is already established, use it instead of creating
+    # a new one.
+    existing_connection = None
+    connection_settings_iterator = (
+        (db_alias, settings.copy())
+        for db_alias, settings in _connection_settings.items()
+    )
+    for db_alias, connection_settings in connection_settings_iterator:
+        connection_settings = _clean_settings(connection_settings)
+        if conn_settings == connection_settings and _connections.get(db_alias):
+            existing_connection = _connections[db_alias]
+            break
+
+    # If an existing connection was found, assign it to the new alias
+    if existing_connection:
+        _connections[alias] = existing_connection
+    else:
+        # Otherwise, create the new connection for this alias. Raise
+        # MongoEngineConnectionError if it can't be established.
         try:
             _connections[alias] = connection_class(**conn_settings)
-        except Exception, e:
+        except Exception as e:
-            raise ConnectionError("Cannot connect to database %s :\n%s" % (alias, e))
+            raise MongoEngineConnectionError(
+                'Cannot connect to database %s :\n%s' % (alias, e))
+
     return _connections[alias]
 
 
 def get_db(alias=DEFAULT_CONNECTION_NAME, reconnect=False):
-    global _dbs
     if reconnect:
         disconnect(alias)
 
     if alias not in _dbs:
         conn = get_connection(alias)
         conn_settings = _connection_settings[alias]
-        _dbs[alias] = conn[conn_settings['name']]
+        db = conn[conn_settings['name']]
+        auth_kwargs = {'source': conn_settings['authentication_source']}
+        if conn_settings['authentication_mechanism'] is not None:
+            auth_kwargs['mechanism'] = conn_settings['authentication_mechanism']
         # Authenticate if necessary
-        if conn_settings['username'] and conn_settings['password']:
+        if conn_settings['username'] and (conn_settings['password'] or
-            _dbs[alias].authenticate(conn_settings['username'],
+                                          conn_settings['authentication_mechanism'] == 'MONGODB-X509'):
-                                     conn_settings['password'])
+            db.authenticate(conn_settings['username'], conn_settings['password'], **auth_kwargs)
+        _dbs[alias] = db
     return _dbs[alias]
 
 
-def connect(db, alias=DEFAULT_CONNECTION_NAME, **kwargs):
+def connect(db=None, alias=DEFAULT_CONNECTION_NAME, **kwargs):
     """Connect to the database specified by the 'db' argument.
 
     Connection settings may be provided here as well if the database is not
@@ -153,14 +248,17 @@ def connect(db, alias=DEFAULT_CONNECTION_NAME, **kwargs):
     Multiple databases are supported by using aliases. Provide a separate
     `alias` to connect to a different instance of :program:`mongod`.
 
+    See the docstring for `register_connection` for more details about all
+    supported kwargs.
+
     .. versionchanged:: 0.6 - added multiple database support.
     """
-    global _connections
     if alias not in _connections:
         register_connection(alias, db, **kwargs)
 
     return get_connection(alias)
 
+
 # Support old naming convention
 _get_connection = get_connection
 _get_db = get_db

mongoengine/context_managers.py

@@ -0,0 +1,226 @@
+from contextlib import contextmanager
+from pymongo.write_concern import WriteConcern
+from mongoengine.common import _import_class
+from mongoengine.connection import DEFAULT_CONNECTION_NAME, get_db
+
+
+__all__ = ('switch_db', 'switch_collection', 'no_dereference',
+           'no_sub_classes', 'query_counter', 'set_write_concern')
+
+
+class switch_db(object):
+    """switch_db alias context manager.
+
+    Example ::
+
+        # Register connections
+        register_connection('default', 'mongoenginetest')
+        register_connection('testdb-1', 'mongoenginetest2')
+
+        class Group(Document):
+            name = StringField()
+
+        Group(name='test').save()  # Saves in the default db
+
+        with switch_db(Group, 'testdb-1') as Group:
+            Group(name='hello testdb!').save()  # Saves in testdb-1
+    """
+
+    def __init__(self, cls, db_alias):
+        """Construct the switch_db context manager
+
+        :param cls: the class to change the registered db
+        :param db_alias: the name of the specific database to use
+        """
+        self.cls = cls
+        self.collection = cls._get_collection()
+        self.db_alias = db_alias
+        self.ori_db_alias = cls._meta.get('db_alias', DEFAULT_CONNECTION_NAME)
+
+    def __enter__(self):
+        """Change the db_alias and clear the cached collection."""
+        self.cls._meta['db_alias'] = self.db_alias
+        self.cls._collection = None
+        return self.cls
+
+    def __exit__(self, t, value, traceback):
+        """Reset the db_alias and collection."""
+        self.cls._meta['db_alias'] = self.ori_db_alias
+        self.cls._collection = self.collection
+
+
+class switch_collection(object):
+    """switch_collection alias context manager.
+
+    Example ::
+
+        class Group(Document):
+            name = StringField()
+
+        Group(name='test').save()  # Saves in the default db
+
+        with switch_collection(Group, 'group1') as Group:
+            Group(name='hello testdb!').save()  # Saves in group1 collection
+    """
+
+    def __init__(self, cls, collection_name):
+        """Construct the switch_collection context manager.
+
+        :param cls: the class to change the registered db
+        :param collection_name: the name of the collection to use
+        """
+        self.cls = cls
+        self.ori_collection = cls._get_collection()
+        self.ori_get_collection_name = cls._get_collection_name
+        self.collection_name = collection_name
+
+    def __enter__(self):
+        """Change the _get_collection_name and clear the cached collection."""
+
+        @classmethod
+        def _get_collection_name(cls):
+            return self.collection_name
+
+        self.cls._get_collection_name = _get_collection_name
+        self.cls._collection = None
+        return self.cls
+
+    def __exit__(self, t, value, traceback):
+        """Reset the collection."""
+        self.cls._collection = self.ori_collection
+        self.cls._get_collection_name = self.ori_get_collection_name
+
+
+class no_dereference(object):
+    """no_dereference context manager.
+
+    Turns off all dereferencing in Documents for the duration of the context
+    manager::
+
+        with no_dereference(Group) as Group:
+            Group.objects.find()
+    """
+
+    def __init__(self, cls):
+        """Construct the no_dereference context manager.
+
+        :param cls: the class to turn dereferencing off on
+        """
+        self.cls = cls
+
+        ReferenceField = _import_class('ReferenceField')
+        GenericReferenceField = _import_class('GenericReferenceField')
+        ComplexBaseField = _import_class('ComplexBaseField')
+
+        self.deref_fields = [k for k, v in self.cls._fields.iteritems()
+                             if isinstance(v, (ReferenceField,
+                                               GenericReferenceField,
+                                               ComplexBaseField))]
+
+    def __enter__(self):
+        """Change the objects default and _auto_dereference values."""
+        for field in self.deref_fields:
+            self.cls._fields[field]._auto_dereference = False
+        return self.cls
+
+    def __exit__(self, t, value, traceback):
+        """Reset the default and _auto_dereference values."""
+        for field in self.deref_fields:
+            self.cls._fields[field]._auto_dereference = True
+        return self.cls
+
+
+class no_sub_classes(object):
+    """no_sub_classes context manager.
+
+    Only returns instances of this class and no sub (inherited) classes::
+
+        with no_sub_classes(Group) as Group:
+            Group.objects.find()
+    """
+
+    def __init__(self, cls):
+        """Construct the no_sub_classes context manager.
+
+        :param cls: the class to turn querying sub classes on
+        """
+        self.cls = cls
+
+    def __enter__(self):
+        """Change the objects default and _auto_dereference values."""
+        self.cls._all_subclasses = self.cls._subclasses
+        self.cls._subclasses = (self.cls,)
+        return self.cls
+
+    def __exit__(self, t, value, traceback):
+        """Reset the default and _auto_dereference values."""
+        self.cls._subclasses = self.cls._all_subclasses
+        delattr(self.cls, '_all_subclasses')
+        return self.cls
+
+
+class query_counter(object):
+    """Query_counter context manager to get the number of queries."""
+
+    def __init__(self):
+        """Construct the query_counter."""
+        self.counter = 0
+        self.db = get_db()
+
+    def __enter__(self):
+        """On every with block we need to drop the profile collection."""
+        self.db.set_profiling_level(0)
+        self.db.system.profile.drop()
+        self.db.set_profiling_level(2)
+        return self
+
+    def __exit__(self, t, value, traceback):
+        """Reset the profiling level."""
+        self.db.set_profiling_level(0)
+
+    def __eq__(self, value):
+        """== Compare querycounter."""
+        counter = self._get_count()
+        return value == counter
+
+    def __ne__(self, value):
+        """!= Compare querycounter."""
+        return not self.__eq__(value)
+
+    def __lt__(self, value):
+        """< Compare querycounter."""
+        return self._get_count() < value
+
+    def __le__(self, value):
+        """<= Compare querycounter."""
+        return self._get_count() <= value
+
+    def __gt__(self, value):
+        """> Compare querycounter."""
+        return self._get_count() > value
+
+    def __ge__(self, value):
+        """>= Compare querycounter."""
+        return self._get_count() >= value
+
+    def __int__(self):
+        """int representation."""
+        return self._get_count()
+
+    def __repr__(self):
+        """repr query_counter as the number of queries."""
+        return u"%s" % self._get_count()
+
+    def _get_count(self):
+        """Get the number of queries."""
+        ignore_query = {'ns': {'$ne': '%s.system.indexes' % self.db.name}}
+        count = self.db.system.profile.find(ignore_query).count() - self.counter
+        self.counter += 1
+        return count
+
+
+@contextmanager
+def set_write_concern(collection, write_concerns):
+    combined_concerns = dict(collection.write_concern.document.items())
+    combined_concerns.update(write_concerns)
+    yield collection.with_options(write_concern=WriteConcern(**combined_concerns))

mongoengine/dereference.py

@@ -1,18 +1,20 @@
 from bson import DBRef, SON
+import six
 
-from base import (BaseDict, BaseList, TopLevelDocumentMetaclass, get_document)
+from mongoengine.base import (BaseDict, BaseList, EmbeddedDocumentList,
-from fields import (ReferenceField, ListField, DictField, MapField)
+                              TopLevelDocumentMetaclass, get_document)
-from connection import get_db
+from mongoengine.base.datastructures import LazyReference
-from queryset import QuerySet
+from mongoengine.connection import get_db
-from document import Document
+from mongoengine.document import Document, EmbeddedDocument
+from mongoengine.fields import DictField, ListField, MapField, ReferenceField
+from mongoengine.queryset import QuerySet
 
 
 class DeReference(object):
-
     def __call__(self, items, max_depth=1, instance=None, name=None):
         """
         Cheaply dereferences the items to a set depth.
-        Also handles the convertion of complex data types.
+        Also handles the conversion of complex data types.
 
         :param items: The iterable (dict, list, queryset) to be dereferenced.
         :param max_depth: The maximum depth to recurse to
@@ -22,7 +24,7 @@ class DeReference(object):
             :class:`~mongoengine.base.ComplexBaseField`
         :param get: A boolean determining if being called by __get__
         """
-        if items is None or isinstance(items, basestring):
+        if items is None or isinstance(items, six.string_types):
             return items
 
         # cheapest way to convert a queryset to a list
@@ -31,11 +33,12 @@ class DeReference(object):
             items = [i for i in items]
 
         self.max_depth = max_depth
-
         doc_type = None
-        if instance and instance._fields:
+
-            doc_type = instance._fields[name]
+        if instance and isinstance(instance, (Document, EmbeddedDocument,
-            if hasattr(doc_type, 'field'):
+                                              TopLevelDocumentMetaclass)):
+            doc_type = instance._fields.get(name)
+            while hasattr(doc_type, 'field'):
                 doc_type = doc_type.field
 
             if isinstance(doc_type, ReferenceField):
@@ -45,20 +48,30 @@ class DeReference(object):
 
                 if is_list and all([i.__class__ == doc_type for i in items]):
                     return items
-                elif not is_list and all([i.__class__ == doc_type
+                elif not is_list and all(
-                                         for i in items.values()]):
+                        [i.__class__ == doc_type for i in items.values()]):
                     return items
                 elif not field.dbref:
                     if not hasattr(items, 'items'):
-                        items = [field.to_python(v)
+
-                             if not isinstance(v, (DBRef, Document)) else v
+                        def _get_items(items):
-                             for v in items]
+                            new_items = []
+                            for v in items:
+                                if isinstance(v, list):
+                                    new_items.append(_get_items(v))
+                                elif not isinstance(v, (DBRef, Document)):
+                                    new_items.append(field.to_python(v))
                                 else:
-                        items = dict([
+                                    new_items.append(v)
-                            (k, field.to_python(v))
+                            return new_items
-                            if not isinstance(v, (DBRef, Document)) else (k, v)
+
-                            for k, v in items.iteritems()]
+                        items = _get_items(items)
-                        )
+                    else:
+                        items = {
+                            k: (v if isinstance(v, (DBRef, Document))
+                                else field.to_python(v))
+                            for k, v in items.iteritems()
+                        }
 
         self.reference_map = self._find_references(items)
         self.object_map = self._fetch_objects(doc_type=doc_type)
@@ -76,36 +89,42 @@ class DeReference(object):
             return reference_map
 
         # Determine the iterator to use
-        if not hasattr(items, 'items'):
+        if isinstance(items, dict):
-            iterator = enumerate(items)
+            iterator = items.values()
         else:
-            iterator = items.iteritems()
+            iterator = items
 
         # Recursively find dbreferences
         depth += 1
-        for k, item in iterator:
+        for item in iterator:
-            if hasattr(item, '_fields'):
+            if isinstance(item, (Document, EmbeddedDocument)):
                 for field_name, field in item._fields.iteritems():
                     v = item._data.get(field_name, None)
-                    if isinstance(v, (DBRef)):
+                    if isinstance(v, LazyReference):
-                        reference_map.setdefault(field.document_type, []).append(v.id)
+                        # LazyReference inherits DBRef but should not be dereferenced here !
+                        continue
+                    elif isinstance(v, DBRef):
+                        reference_map.setdefault(field.document_type, set()).add(v.id)
                     elif isinstance(v, (dict, SON)) and '_ref' in v:
-                        reference_map.setdefault(get_document(v['_cls']), []).append(v['_ref'].id)
+                        reference_map.setdefault(get_document(v['_cls']), set()).add(v['_ref'].id)
                     elif isinstance(v, (dict, list, tuple)) and depth <= self.max_depth:
                         field_cls = getattr(getattr(field, 'field', None), 'document_type', None)
                         references = self._find_references(v, depth)
                         for key, refs in references.iteritems():
                             if isinstance(field_cls, (Document, TopLevelDocumentMetaclass)):
                                 key = field_cls
-                            reference_map.setdefault(key, []).extend(refs)
+                            reference_map.setdefault(key, set()).update(refs)
-            elif isinstance(item, (DBRef)):
+            elif isinstance(item, LazyReference):
-                reference_map.setdefault(item.collection, []).append(item.id)
+                # LazyReference inherits DBRef but should not be dereferenced here !
+                continue
+            elif isinstance(item, DBRef):
+                reference_map.setdefault(item.collection, set()).add(item.id)
             elif isinstance(item, (dict, SON)) and '_ref' in item:
-                reference_map.setdefault(get_document(item['_cls']), []).append(item['_ref'].id)
+                reference_map.setdefault(get_document(item['_cls']), set()).add(item['_ref'].id)
             elif isinstance(item, (dict, list, tuple)) and depth - 1 <= self.max_depth:
                 references = self._find_references(item, depth - 1)
                 for key, refs in references.iteritems():
-                    reference_map.setdefault(key, []).extend(refs)
+                    reference_map.setdefault(key, set()).update(refs)
 
         return reference_map
 
@@ -113,31 +132,38 @@ class DeReference(object):
         """Fetch all references and convert to their document objects
         """
         object_map = {}
-        for col, dbrefs in self.reference_map.iteritems():
+        for collection, dbrefs in self.reference_map.iteritems():
-            keys = object_map.keys()
+            if hasattr(collection, 'objects'):  # We have a document class for the refs
-            refs = list(set([dbref for dbref in dbrefs if str(dbref) not in keys]))
+                col_name = collection._get_collection_name()
-            if hasattr(col, 'objects'):  # We have a document class for the refs
+                refs = [dbref for dbref in dbrefs
-                references = col.objects.in_bulk(refs)
+                        if (col_name, dbref) not in object_map]
+                references = collection.objects.in_bulk(refs)
                 for key, doc in references.iteritems():
-                    object_map[key] = doc
+                    object_map[(col_name, key)] = doc
             else:  # Generic reference: use the refs data to convert to document
-                if doc_type and not isinstance(doc_type, (ListField, DictField, MapField,) ):
+                if isinstance(doc_type, (ListField, DictField, MapField,)):
-                    references = doc_type._get_db()[col].find({'_id': {'$in': refs}})
+                    continue
+
+                refs = [dbref for dbref in dbrefs
+                        if (collection, dbref) not in object_map]
+
+                if doc_type:
+                    references = doc_type._get_db()[collection].find({'_id': {'$in': refs}})
                     for ref in references:
                         doc = doc_type._from_son(ref)
-                        object_map[doc.id] = doc
+                        object_map[(collection, doc.id)] = doc
                 else:
-                    references = get_db()[col].find({'_id': {'$in': refs}})
+                    references = get_db()[collection].find({'_id': {'$in': refs}})
                     for ref in references:
                         if '_cls' in ref:
-                            doc = get_document(ref["_cls"])._from_son(ref)
+                            doc = get_document(ref['_cls'])._from_son(ref)
                         elif doc_type is None:
                             doc = get_document(
                                 ''.join(x.capitalize()
-                                        for x in col.split('_')))._from_son(ref)
+                                        for x in collection.split('_')))._from_son(ref)
                         else:
                             doc = doc_type._from_son(ref)
-                        object_map[doc.id] = doc
+                        object_map[(collection, doc.id)] = doc
         return object_map
 
     def _attach_objects(self, items, depth=0, instance=None, name=None):
@@ -163,14 +189,23 @@ class DeReference(object):
 
         if isinstance(items, (dict, SON)):
             if '_ref' in items:
-                return self.object_map.get(items['_ref'].id, items)
+                return self.object_map.get(
-            elif '_types' in items and '_cls' in items:
+                    (items['_ref'].collection, items['_ref'].id), items)
+            elif '_cls' in items:
                 doc = get_document(items['_cls'])._from_son(items)
-                doc._data = self._attach_objects(doc._data, depth, doc, name)
+                _cls = doc._data.pop('_cls', None)
+                del items['_cls']
+                doc._data = self._attach_objects(doc._data, depth, doc, None)
+                if _cls is not None:
+                    doc._data['_cls'] = _cls
                 return doc
 
         if not hasattr(items, 'items'):
             is_list = True
+            list_type = BaseList
+            if isinstance(items, EmbeddedDocumentList):
+                list_type = EmbeddedDocumentList
+            as_tuple = isinstance(items, tuple)
             iterator = enumerate(items)
             data = []
         else:
@@ -187,25 +222,27 @@ class DeReference(object):
 
             if k in self.object_map and not is_list:
                 data[k] = self.object_map[k]
-            elif hasattr(v, '_fields'):
+            elif isinstance(v, (Document, EmbeddedDocument)):
-                for field_name, field in v._fields.iteritems():
+                for field_name in v._fields:
                     v = data[k]._data.get(field_name, None)
-                    if isinstance(v, (DBRef)):
+                    if isinstance(v, DBRef):
-                        data[k]._data[field_name] = self.object_map.get(v.id, v)
+                        data[k]._data[field_name] = self.object_map.get(
+                            (v.collection, v.id), v)
                     elif isinstance(v, (dict, SON)) and '_ref' in v:
-                        data[k]._data[field_name] = self.object_map.get(v['_ref'].id, v)
+                        data[k]._data[field_name] = self.object_map.get(
-                    elif isinstance(v, dict) and depth <= self.max_depth:
+                            (v['_ref'].collection, v['_ref'].id), v)
-                        data[k]._data[field_name] = self._attach_objects(v, depth, instance=instance, name=name)
-                    elif isinstance(v, (list, tuple)) and depth <= self.max_depth:
-                        data[k]._data[field_name] = self._attach_objects(v, depth, instance=instance, name=name)
                     elif isinstance(v, (dict, list, tuple)) and depth <= self.max_depth:
-                data[k] = self._attach_objects(v, depth - 1, instance=instance, name=name)
+                        item_name = six.text_type('{0}.{1}.{2}').format(name, k, field_name)
-            elif hasattr(v, 'id'):
+                        data[k]._data[field_name] = self._attach_objects(v, depth, instance=instance, name=item_name)
-                data[k] = self.object_map.get(v.id, v)
+            elif isinstance(v, (dict, list, tuple)) and depth <= self.max_depth:
+                item_name = '%s.%s' % (name, k) if name else name
+                data[k] = self._attach_objects(v, depth - 1, instance=instance, name=item_name)
+            elif isinstance(v, DBRef) and hasattr(v, 'id'):
+                data[k] = self.object_map.get((v.collection, v.id), v)
 
         if instance and name:
             if is_list:
-                return BaseList(data, instance, name)
+                return tuple(data) if as_tuple else list_type(data, instance, name)
             return BaseDict(data, instance, name)
         depth += 1
         return data

mongoengine/django/auth.py

@@ -1,159 +0,0 @@
-import datetime
-
-from mongoengine import *
-
-from django.utils.encoding import smart_str
-from django.contrib.auth.models import AnonymousUser
-from django.utils.translation import ugettext_lazy as _
-
-try:
-    from django.contrib.auth.hashers import check_password, make_password
-except ImportError:
-    """Handle older versions of Django"""
-    from django.utils.hashcompat import md5_constructor, sha_constructor
-
-    def get_hexdigest(algorithm, salt, raw_password):
-        raw_password, salt = smart_str(raw_password), smart_str(salt)
-        if algorithm == 'md5':
-            return md5_constructor(salt + raw_password).hexdigest()
-        elif algorithm == 'sha1':
-            return sha_constructor(salt + raw_password).hexdigest()
-        raise ValueError('Got unknown password algorithm type in password')
-
-    def check_password(raw_password, password):
-        algo, salt, hash = password.split('$')
-        return hash == get_hexdigest(algo, salt, raw_password)
-
-    def make_password(raw_password):
-        from random import random
-        algo = 'sha1'
-        salt = get_hexdigest(algo, str(random()), str(random()))[:5]
-        hash = get_hexdigest(algo, salt, raw_password)
-        return '%s$%s$%s' % (algo, salt, hash)
-
-
-REDIRECT_FIELD_NAME = 'next'
-
-class User(Document):
-    """A User document that aims to mirror most of the API specified by Django
-    at http://docs.djangoproject.com/en/dev/topics/auth/#users
-    """
-    username = StringField(max_length=30, required=True,
-                           verbose_name=_('username'),
-                           help_text=_("Required. 30 characters or fewer. Letters, numbers and @/./+/-/_ characters"))
-
-    first_name = StringField(max_length=30,
-                             verbose_name=_('first name'))
-
-    last_name = StringField(max_length=30,
-                            verbose_name=_('last name'))
-    email = EmailField(verbose_name=_('e-mail address'))
-    password = StringField(max_length=128,
-                           verbose_name=_('password'),
-                           help_text=_("Use '[algo]$[iterations]$[salt]$[hexdigest]' or use the <a href=\"password/\">change password form</a>."))
-    is_staff = BooleanField(default=False,
-                            verbose_name=_('staff status'),
-                            help_text=_("Designates whether the user can log into this admin site."))
-    is_active = BooleanField(default=True,
-                             verbose_name=_('active'),
-                             help_text=_("Designates whether this user should be treated as active. Unselect this instead of deleting accounts."))
-    is_superuser = BooleanField(default=False,
-                                verbose_name=_('superuser status'),
-                                help_text=_("Designates that this user has all permissions without explicitly assigning them."))
-    last_login = DateTimeField(default=datetime.datetime.now,
-                               verbose_name=_('last login'))
-    date_joined = DateTimeField(default=datetime.datetime.now,
-                                verbose_name=_('date joined'))
-
-    meta = {
-        'allow_inheritance': True,
-        'indexes': [
-            {'fields': ['username'], 'unique': True}
-        ]
-    }
-
-    def __unicode__(self):
-        return self.username
-
-    def get_full_name(self):
-        """Returns the users first and last names, separated by a space.
-        """
-        full_name = u'%s %s' % (self.first_name or '', self.last_name or '')
-        return full_name.strip()
-
-    def is_anonymous(self):
-        return False
-
-    def is_authenticated(self):
-        return True
-
-    def set_password(self, raw_password):
-        """Sets the user's password - always use this rather than directly
-        assigning to :attr:`~mongoengine.django.auth.User.password` as the
-        password is hashed before storage.
-        """
-        self.password = make_password(raw_password)
-        self.save()
-        return self
-
-    def check_password(self, raw_password):
-        """Checks the user's password against a provided password - always use
-        this rather than directly comparing to
-        :attr:`~mongoengine.django.auth.User.password` as the password is
-        hashed before storage.
-        """
-        return check_password(raw_password, self.password)
-
-    @classmethod
-    def create_user(cls, username, password, email=None):
-        """Create (and save) a new user with the given username, password and
-        email address.
-        """
-        now = datetime.datetime.now()
-
-        # Normalize the address by lowercasing the domain part of the email
-        # address.
-        if email is not None:
-            try:
-                email_name, domain_part = email.strip().split('@', 1)
-            except ValueError:
-                pass
-            else:
-                email = '@'.join([email_name, domain_part.lower()])
-
-        user = cls(username=username, email=email, date_joined=now)
-        user.set_password(password)
-        user.save()
-        return user
-
-    def get_and_delete_messages(self):
-        return []
-
-
-class MongoEngineBackend(object):
-    """Authenticate using MongoEngine and mongoengine.django.auth.User.
-    """
-
-    supports_object_permissions = False
-    supports_anonymous_user = False
-    supports_inactive_user = False
-
-    def authenticate(self, username=None, password=None):
-        user = User.objects(username=username).first()
-        if user:
-            if password and user.check_password(password):
-                return user
-        return None
-
-    def get_user(self, user_id):
-        return User.objects.with_id(user_id)
-
-
-def get_user(userid):
-    """Returns a User object from an id (User.id). Django's equivalent takes
-    request, but taking an id instead leaves it up to the developer to store
-    the id in any way they want (session, signed cookie, etc.)
-    """
-    if not userid:
-        return AnonymousUser()
-    return MongoEngineBackend().get_user(userid) or AnonymousUser()

mongoengine/django/sessions.py

@@ -1,74 +0,0 @@
-from datetime import datetime
-
-from django.conf import settings
-from django.contrib.sessions.backends.base import SessionBase, CreateError
-from django.core.exceptions import SuspiciousOperation
-from django.utils.encoding import force_unicode
-
-from mongoengine.document import Document
-from mongoengine import fields
-from mongoengine.queryset import OperationError
-from mongoengine.connection import DEFAULT_CONNECTION_NAME
-
-
-MONGOENGINE_SESSION_DB_ALIAS = getattr(
-    settings, 'MONGOENGINE_SESSION_DB_ALIAS',
-    DEFAULT_CONNECTION_NAME)
-
-
-class MongoSession(Document):
-    session_key = fields.StringField(primary_key=True, max_length=40)
-    session_data = fields.StringField()
-    expire_date = fields.DateTimeField()
-
-    meta = {'collection': 'django_session',
-            'db_alias': MONGOENGINE_SESSION_DB_ALIAS,
-            'allow_inheritance': False}
-
-
-class SessionStore(SessionBase):
-    """A MongoEngine-based session store for Django.
-    """
-
-    def load(self):
-        try:
-            s = MongoSession.objects(session_key=self.session_key,
-                                     expire_date__gt=datetime.now())[0]
-            return self.decode(force_unicode(s.session_data))
-        except (IndexError, SuspiciousOperation):
-            self.create()
-            return {}
-
-    def exists(self, session_key):
-        return bool(MongoSession.objects(session_key=session_key).first())
-
-    def create(self):
-        while True:
-            self._session_key = self._get_new_session_key()
-            try:
-                self.save(must_create=True)
-            except CreateError:
-                continue
-            self.modified = True
-            self._session_cache = {}
-            return
-
-    def save(self, must_create=False):
-        if self.session_key is None:
-            self._session_key = self._get_new_session_key()
-        s = MongoSession(session_key=self.session_key)
-        s.session_data = self.encode(self._get_session(no_load=must_create))
-        s.expire_date = self.get_expiry_date()
-        try:
-            s.save(force_insert=must_create, safe=True)
-        except OperationError:
-            if must_create:
-                raise CreateError
-            raise
-
-    def delete(self, session_key=None):
-        if session_key is None:
-            if self.session_key is None:
-                return
-            session_key = self.session_key
-        MongoSession.objects(session_key=session_key).delete()

mongoengine/django/shortcuts.py

@@ -1,47 +0,0 @@
-from mongoengine.queryset import QuerySet
-from mongoengine.base import BaseDocument
-from mongoengine.base import ValidationError
-
-def _get_queryset(cls):
-    """Inspired by django.shortcuts.*"""
-    if isinstance(cls, QuerySet):
-        return cls
-    else:
-        return cls.objects
-
-def get_document_or_404(cls, *args, **kwargs):
-    """
-    Uses get() to return an document, or raises a Http404 exception if the document
-    does not exist.
-
-    cls may be a Document or QuerySet object. All other passed
-    arguments and keyword arguments are used in the get() query.
-
-    Note: Like with get(), an MultipleObjectsReturned will be raised if more than one
-    object is found.
-
-    Inspired by django.shortcuts.*
-    """
-    queryset = _get_queryset(cls)
-    try:
-        return queryset.get(*args, **kwargs)
-    except (queryset._document.DoesNotExist, ValidationError):
-        from django.http import Http404
-        raise Http404('No %s matches the given query.' % queryset._document._class_name)
-
-def get_list_or_404(cls, *args, **kwargs):
-    """
-    Uses filter() to return a list of documents, or raise a Http404 exception if
-    the list is empty.
-
-    cls may be a Document or QuerySet object. All other passed
-    arguments and keyword arguments are used in the filter() query.
-
-    Inspired by django.shortcuts.*
-    """
-    queryset = _get_queryset(cls)
-    obj_list = list(queryset.filter(*args, **kwargs))
-    if not obj_list:
-        from django.http import Http404
-        raise Http404('No %s matches the given query.' % queryset._document._class_name)
-    return obj_list

mongoengine/django/storage.py

@@ -1,112 +0,0 @@
-import os
-import itertools
-import urlparse
-
-from mongoengine import *
-from django.conf import settings
-from django.core.files.storage import Storage
-from django.core.exceptions import ImproperlyConfigured
-
-
-class FileDocument(Document):
-    """A document used to store a single file in GridFS.
-    """
-    file = FileField()
-
-
-class GridFSStorage(Storage):
-    """A custom storage backend to store files in GridFS
-    """
-
-    def __init__(self, base_url=None):
-
-        if base_url is None:
-            base_url = settings.MEDIA_URL
-        self.base_url = base_url
-        self.document = FileDocument
-        self.field = 'file'
-
-    def delete(self, name):
-        """Deletes the specified file from the storage system.
-        """
-        if self.exists(name):
-            doc = self.document.objects.first()
-            field = getattr(doc, self.field)
-            self._get_doc_with_name(name).delete()  # Delete the FileField
-            field.delete()                          # Delete the FileDocument
-
-    def exists(self, name):
-        """Returns True if a file referened by the given name already exists in the
-        storage system, or False if the name is available for a new file.
-        """
-        doc = self._get_doc_with_name(name)
-        if doc:
-            field = getattr(doc, self.field)
-            return bool(field.name)
-        else:
-            return False
-
-    def listdir(self, path=None):
-        """Lists the contents of the specified path, returning a 2-tuple of lists;
-        the first item being directories, the second item being files.
-        """
-        def name(doc):
-            return getattr(doc, self.field).name
-        docs = self.document.objects
-        return [], [name(d) for d in docs if name(d)]
-
-    def size(self, name):
-        """Returns the total size, in bytes, of the file specified by name.
-        """
-        doc = self._get_doc_with_name(name)
-        if doc:
-            return getattr(doc, self.field).length
-        else:
-            raise ValueError("No such file or directory: '%s'" % name)
-
-    def url(self, name):
-        """Returns an absolute URL where the file's contents can be accessed
-        directly by a web browser.
-        """
-        if self.base_url is None:
-            raise ValueError("This file is not accessible via a URL.")
-        return urlparse.urljoin(self.base_url, name).replace('\\', '/')
-
-    def _get_doc_with_name(self, name):
-        """Find the documents in the store with the given name
-        """
-        docs = self.document.objects
-        doc = [d for d in docs if getattr(d, self.field).name == name]
-        if doc:
-            return doc[0]
-        else:
-            return None
-
-    def _open(self, name, mode='rb'):
-        doc = self._get_doc_with_name(name)
-        if doc:
-            return getattr(doc, self.field)
-        else:
-            raise ValueError("No file found with the name '%s'." % name)
-
-    def get_available_name(self, name):
-        """Returns a filename that's free on the target storage system, and
-        available for new content to be written to.
-        """
-        file_root, file_ext = os.path.splitext(name)
-        # If the filename already exists, add an underscore and a number (before
-        # the file extension, if one exists) to the filename until the generated
-        # filename doesn't exist.
-        count = itertools.count(1)
-        while self.exists(name):
-            # file_ext includes the dot.
-            name = os.path.join("%s_%s%s" % (file_root, count.next(), file_ext))
-
-        return name
-
-    def _save(self, name, content):
-        doc = self.document()
-        getattr(doc, self.field).put(content, filename=name)
-        doc.save()
-
-        return name

mongoengine/django/tests.py

@@ -1,39 +0,0 @@
-#coding: utf-8
-from nose.plugins.skip import SkipTest
-
-from mongoengine.python_support import PY3
-from mongoengine import connect
-
-try:
-    from django.test import TestCase
-    from django.conf import settings
-except Exception as err:
-    if PY3:
-        from unittest import TestCase
-        # Dummy value so no error
-        class settings:
-            MONGO_DATABASE_NAME = 'dummy'
-    else:
-        raise err
-
-
-class MongoTestCase(TestCase):
-
-    def setUp(self):
-        if PY3:
-            raise SkipTest('django does not have Python 3 support')
-
-    """
-    TestCase class that clear the collection between the tests
-    """
-    db_name = 'test_%s' % settings.MONGO_DATABASE_NAME
-    def __init__(self, methodName='runtest'):
-        self.db = connect(self.db_name).get_db()
-        super(MongoTestCase, self).__init__(methodName)
-
-    def _post_teardown(self):
-        super(MongoTestCase, self)._post_teardown()
-        for collection in self.db.collection_names():
-            if collection == 'system.indexes':
-                continue
-            self.db.drop_collection(collection)

mongoengine/errors.py

@@ -0,0 +1,145 @@
+from collections import defaultdict
+
+import six
+
+__all__ = ('NotRegistered', 'InvalidDocumentError', 'LookUpError',
+           'DoesNotExist', 'MultipleObjectsReturned', 'InvalidQueryError',
+           'OperationError', 'NotUniqueError', 'FieldDoesNotExist',
+           'ValidationError', 'SaveConditionError')
+
+
+class NotRegistered(Exception):
+    pass
+
+
+class InvalidDocumentError(Exception):
+    pass
+
+
+class LookUpError(AttributeError):
+    pass
+
+
+class DoesNotExist(Exception):
+    pass
+
+
+class MultipleObjectsReturned(Exception):
+    pass
+
+
+class InvalidQueryError(Exception):
+    pass
+
+
+class OperationError(Exception):
+    pass
+
+
+class NotUniqueError(OperationError):
+    pass
+
+
+class SaveConditionError(OperationError):
+    pass
+
+
+class FieldDoesNotExist(Exception):
+    """Raised when trying to set a field
+    not declared in a :class:`~mongoengine.Document`
+    or an :class:`~mongoengine.EmbeddedDocument`.
+
+    To avoid this behavior on data loading,
+    you should set the :attr:`strict` to ``False``
+    in the :attr:`meta` dictionary.
+    """
+
+
+class ValidationError(AssertionError):
+    """Validation exception.
+
+    May represent an error validating a field or a
+    document containing fields with validation errors.
+
+    :ivar errors: A dictionary of errors for fields within this
+        document or list, or None if the error is for an
+        individual field.
+    """
+
+    errors = {}
+    field_name = None
+    _message = None
+
+    def __init__(self, message='', **kwargs):
+        self.errors = kwargs.get('errors', {})
+        self.field_name = kwargs.get('field_name')
+        self.message = message
+
+    def __str__(self):
+        return six.text_type(self.message)
+
+    def __repr__(self):
+        return '%s(%s,)' % (self.__class__.__name__, self.message)
+
+    def __getattribute__(self, name):
+        message = super(ValidationError, self).__getattribute__(name)
+        if name == 'message':
+            if self.field_name:
+                message = '%s' % message
+            if self.errors:
+                message = '%s(%s)' % (message, self._format_errors())
+        return message
+
+    def _get_message(self):
+        return self._message
+
+    def _set_message(self, message):
+        self._message = message
+
+    message = property(_get_message, _set_message)
+
+    def to_dict(self):
+        """Returns a dictionary of all errors within a document
+
+        Keys are field names or list indices and values are the
+        validation error messages, or a nested dictionary of
+        errors for an embedded document or list.
+        """
+
+        def build_dict(source):
+            errors_dict = {}
+            if not source:
+                return errors_dict
+
+            if isinstance(source, dict):
+                for field_name, error in source.iteritems():
+                    errors_dict[field_name] = build_dict(error)
+            elif isinstance(source, ValidationError) and source.errors:
+                return build_dict(source.errors)
+            else:
+                return six.text_type(source)
+
+            return errors_dict
+
+        if not self.errors:
+            return {}
+
+        return build_dict(self.errors)
+
+    def _format_errors(self):
+        """Returns a string listing all errors within a document"""
+
+        def generate_key(value, prefix=''):
+            if isinstance(value, list):
+                value = ' '.join([generate_key(k) for k in value])
+            elif isinstance(value, dict):
+                value = ' '.join(
+                    [generate_key(v, k) for k, v in value.iteritems()])
+
+            results = '%s.%s' % (prefix, value) if prefix else value
+            return results
+
+        error_dict = defaultdict(list)
+        for k, v in self.to_dict().iteritems():
+            error_dict[generate_key(v)].append(k)
+        return ' '.join(['%s: %s' % (k, v) for k, v in error_dict.iteritems()])

mongoengine/python_support.py

@@ -1,60 +1,25 @@
-"""Helper functions and types to aid with Python 2.5 - 3 support."""
+"""
+Helper functions, constants, and types to aid with Python v2.7 - v3.x and
+PyMongo v2.7 - v3.x support.
+"""
+import pymongo
+import six
 
-import sys
 
-PY3 = sys.version_info[0] == 3
+if pymongo.version_tuple[0] < 3:
-PY25 = sys.version_info[:2] == (2, 5)
+    IS_PYMONGO_3 = False
-
-if PY3:
-    import codecs
-    from io import BytesIO as StringIO
-    # return s converted to binary.  b('test') should be equivalent to b'test'
-    def b(s):
-        return codecs.latin_1_encode(s)[0]
-
-    bin_type = bytes
-    txt_type   = str
 else:
+    IS_PYMONGO_3 = True
+
+
+# six.BytesIO resolves to StringIO.StringIO in Py2 and io.BytesIO in Py3.
+StringIO = six.BytesIO
+
+# Additionally for Py2, try to use the faster cStringIO, if available
+if not six.PY3:
     try:
-        from cStringIO import StringIO
+        import cStringIO
     except ImportError:
-        from StringIO import StringIO
+        pass
-
-    # Conversion to binary only necessary in Python 3
-    def b(s):
-        return s
-
-    bin_type = str
-    txt_type = unicode
-
-str_types = (bin_type, txt_type)
-
-if PY25:
-    def product(*args, **kwds):
-        pools = map(tuple, args) * kwds.get('repeat', 1)
-        result = [[]]
-        for pool in pools:
-            result = [x + [y] for x in result for y in pool]
-        for prod in result:
-            yield tuple(prod)
-    reduce = reduce
     else:
-    from itertools import product
+        StringIO = cStringIO.StringIO
-    from functools import reduce
-
-
-# For use with Python 2.5
-# converts all keys from unicode to str for d and all nested dictionaries
-def to_str_keys_recursive(d):
-    if isinstance(d, list):
-        for val in d:
-            if isinstance(val, (dict, list)):
-                to_str_keys_recursive(val)
-    elif isinstance(d, dict):
-        for key, val in d.items():
-            if isinstance(val, (dict, list)):
-                to_str_keys_recursive(val)
-            if isinstance(key, unicode):
-                d[str(key)] = d.pop(key)
-    else:
-        raise ValueError("non list/dict parameter not allowed")

mongoengine/queryset/__init__.py

@@ -0,0 +1,17 @@
+from mongoengine.errors import *
+from mongoengine.queryset.field_list import *
+from mongoengine.queryset.manager import *
+from mongoengine.queryset.queryset import *
+from mongoengine.queryset.transform import *
+from mongoengine.queryset.visitor import *
+
+# Expose just the public subset of all imported objects and constants.
+__all__ = (
+    'QuerySet', 'QuerySetNoCache', 'Q', 'queryset_manager', 'QuerySetManager',
+    'QueryFieldList', 'DO_NOTHING', 'NULLIFY', 'CASCADE', 'DENY', 'PULL',
+
+    # Errors that might be related to a queryset, mostly here for backward
+    # compatibility
+    'DoesNotExist', 'InvalidQueryError', 'MultipleObjectsReturned',
+    'NotUniqueError', 'OperationError',
+)

mongoengine/queryset/field_list.py

@@ -0,0 +1,85 @@
+__all__ = ('QueryFieldList',)
+
+
+class QueryFieldList(object):
+    """Object that handles combinations of .only() and .exclude() calls"""
+    ONLY = 1
+    EXCLUDE = 0
+
+    def __init__(self, fields=None, value=ONLY, always_include=None, _only_called=False):
+        """The QueryFieldList builder
+
+        :param fields: A list of fields used in `.only()` or `.exclude()`
+        :param value: How to handle the fields; either `ONLY` or `EXCLUDE`
+        :param always_include: Any fields to always_include eg `_cls`
+        :param _only_called: Has `.only()` been called?  If so its a set of fields
+           otherwise it performs a union.
+        """
+        self.value = value
+        self.fields = set(fields or [])
+        self.always_include = set(always_include or [])
+        self._id = None
+        self._only_called = _only_called
+        self.slice = {}
+
+    def __add__(self, f):
+        if isinstance(f.value, dict):
+            for field in f.fields:
+                self.slice[field] = f.value
+            if not self.fields:
+                self.fields = f.fields
+        elif not self.fields:
+            self.fields = f.fields
+            self.value = f.value
+            self.slice = {}
+        elif self.value is self.ONLY and f.value is self.ONLY:
+            self._clean_slice()
+            if self._only_called:
+                self.fields = self.fields.union(f.fields)
+            else:
+                self.fields = f.fields
+        elif self.value is self.EXCLUDE and f.value is self.EXCLUDE:
+            self.fields = self.fields.union(f.fields)
+            self._clean_slice()
+        elif self.value is self.ONLY and f.value is self.EXCLUDE:
+            self.fields -= f.fields
+            self._clean_slice()
+        elif self.value is self.EXCLUDE and f.value is self.ONLY:
+            self.value = self.ONLY
+            self.fields = f.fields - self.fields
+            self._clean_slice()
+
+        if '_id' in f.fields:
+            self._id = f.value
+
+        if self.always_include:
+            if self.value is self.ONLY and self.fields:
+                if sorted(self.slice.keys()) != sorted(self.fields):
+                    self.fields = self.fields.union(self.always_include)
+            else:
+                self.fields -= self.always_include
+
+        if getattr(f, '_only_called', False):
+            self._only_called = True
+        return self
+
+    def __nonzero__(self):
+        return bool(self.fields)
+
+    def as_dict(self):
+        field_list = {field: self.value for field in self.fields}
+        if self.slice:
+            field_list.update(self.slice)
+        if self._id is not None:
+            field_list['_id'] = self._id
+        return field_list
+
+    def reset(self):
+        self.fields = set([])
+        self.slice = {}
+        self.value = self.ONLY
+
+    def _clean_slice(self):
+        if self.slice:
+            for field in set(self.slice.keys()) - self.fields:
+                del self.slice[field]

mongoengine/queryset/manager.py

@@ -0,0 +1,57 @@
+from functools import partial
+from mongoengine.queryset.queryset import QuerySet
+
+__all__ = ('queryset_manager', 'QuerySetManager')
+
+
+class QuerySetManager(object):
+    """
+    The default QuerySet Manager.
+
+    Custom QuerySet Manager functions can extend this class and users can
+    add extra queryset functionality.  Any custom manager methods must accept a
+    :class:`~mongoengine.Document` class as its first argument, and a
+    :class:`~mongoengine.queryset.QuerySet` as its second argument.
+
+    The method function should return a :class:`~mongoengine.queryset.QuerySet`
+    , probably the same one that was passed in, but modified in some way.
+    """
+
+    get_queryset = None
+    default = QuerySet
+
+    def __init__(self, queryset_func=None):
+        if queryset_func:
+            self.get_queryset = queryset_func
+
+    def __get__(self, instance, owner):
+        """Descriptor for instantiating a new QuerySet object when
+        Document.objects is accessed.
+        """
+        if instance is not None:
+            # Document object being used rather than a document class
+            return self
+
+        # owner is the document that contains the QuerySetManager
+        queryset_class = owner._meta.get('queryset_class', self.default)
+        queryset = queryset_class(owner, owner._get_collection())
+        if self.get_queryset:
+            arg_count = self.get_queryset.func_code.co_argcount
+            if arg_count == 1:
+                queryset = self.get_queryset(queryset)
+            elif arg_count == 2:
+                queryset = self.get_queryset(owner, queryset)
+            else:
+                queryset = partial(self.get_queryset, owner, queryset)
+        return queryset
+
+
+def queryset_manager(func):
+    """Decorator that allows you to define custom QuerySet managers on
+    :class:`~mongoengine.Document` classes. The manager must be a function that
+    accepts a :class:`~mongoengine.Document` class as its first argument, and a
+    :class:`~mongoengine.queryset.QuerySet` as its second argument. The method
+    function should return a :class:`~mongoengine.queryset.QuerySet`, probably
+    the same one that was passed in, but modified in some way.
+    """
+    return QuerySetManager(func)

mongoengine/queryset/queryset.py

@@ -0,0 +1,195 @@
+import six
+
+from mongoengine.errors import OperationError
+from mongoengine.queryset.base import (BaseQuerySet, CASCADE, DENY, DO_NOTHING,
+                                       NULLIFY, PULL)
+
+__all__ = ('QuerySet', 'QuerySetNoCache', 'DO_NOTHING', 'NULLIFY', 'CASCADE',
+           'DENY', 'PULL')
+
+# The maximum number of items to display in a QuerySet.__repr__
+REPR_OUTPUT_SIZE = 20
+ITER_CHUNK_SIZE = 100
+
+
+class QuerySet(BaseQuerySet):
+    """The default queryset, that builds queries and handles a set of results
+    returned from a query.
+
+    Wraps a MongoDB cursor, providing :class:`~mongoengine.Document` objects as
+    the results.
+    """
+
+    _has_more = True
+    _len = None
+    _result_cache = None
+
+    def __iter__(self):
+        """Iteration utilises a results cache which iterates the cursor
+        in batches of ``ITER_CHUNK_SIZE``.
+
+        If ``self._has_more`` the cursor hasn't been exhausted so cache then
+        batch. Otherwise iterate the result_cache.
+        """
+        self._iter = True
+
+        if self._has_more:
+            return self._iter_results()
+
+        # iterating over the cache.
+        return iter(self._result_cache)
+
+    def __len__(self):
+        """Since __len__ is called quite frequently (for example, as part of
+        list(qs)), we populate the result cache and cache the length.
+        """
+        if self._len is not None:
+            return self._len
+
+        # Populate the result cache with *all* of the docs in the cursor
+        if self._has_more:
+            list(self._iter_results())
+
+        # Cache the length of the complete result cache and return it
+        self._len = len(self._result_cache)
+        return self._len
+
+    def __repr__(self):
+        """Provide a string representation of the QuerySet"""
+        if self._iter:
+            return '.. queryset mid-iteration ..'
+
+        self._populate_cache()
+        data = self._result_cache[:REPR_OUTPUT_SIZE + 1]
+        if len(data) > REPR_OUTPUT_SIZE:
+            data[-1] = '...(remaining elements truncated)...'
+        return repr(data)
+
+    def _iter_results(self):
+        """A generator for iterating over the result cache.
+
+        Also populates the cache if there are more possible results to
+        yield. Raises StopIteration when there are no more results.
+        """
+        if self._result_cache is None:
+            self._result_cache = []
+
+        pos = 0
+        while True:
+
+            # For all positions lower than the length of the current result
+            # cache, serve the docs straight from the cache w/o hitting the
+            # database.
+            # XXX it's VERY important to compute the len within the `while`
+            # condition because the result cache might expand mid-iteration
+            # (e.g. if we call len(qs) inside a loop that iterates over the
+            # queryset). Fortunately len(list) is O(1) in Python, so this
+            # doesn't cause performance issues.
+            while pos < len(self._result_cache):
+                yield self._result_cache[pos]
+                pos += 1
+
+            # Raise StopIteration if we already established there were no more
+            # docs in the db cursor.
+            if not self._has_more:
+                return
+
+            # Otherwise, populate more of the cache and repeat.
+            if len(self._result_cache) <= pos:
+                self._populate_cache()
+
+    def _populate_cache(self):
+        """
+        Populates the result cache with ``ITER_CHUNK_SIZE`` more entries
+        (until the cursor is exhausted).
+        """
+        if self._result_cache is None:
+            self._result_cache = []
+
+        # Skip populating the cache if we already established there are no
+        # more docs to pull from the database.
+        if not self._has_more:
+            return
+
+        # Pull in ITER_CHUNK_SIZE docs from the database and store them in
+        # the result cache.
+        try:
+            for _ in six.moves.range(ITER_CHUNK_SIZE):
+                self._result_cache.append(self.next())
+        except StopIteration:
+            # Getting this exception means there are no more docs in the
+            # db cursor. Set _has_more to False so that we can use that
+            # information in other places.
+            self._has_more = False
+
+    def count(self, with_limit_and_skip=False):
+        """Count the selected elements in the query.
+
+        :param with_limit_and_skip (optional): take any :meth:`limit` or
+            :meth:`skip` that has been applied to this cursor into account when
+            getting the count
+        """
+        if with_limit_and_skip is False:
+            return super(QuerySet, self).count(with_limit_and_skip)
+
+        if self._len is None:
+            self._len = super(QuerySet, self).count(with_limit_and_skip)
+
+        return self._len
+
+    def no_cache(self):
+        """Convert to a non-caching queryset
+
+        .. versionadded:: 0.8.3 Convert to non caching queryset
+        """
+        if self._result_cache is not None:
+            raise OperationError('QuerySet already cached')
+
+        return self._clone_into(QuerySetNoCache(self._document,
+                                                self._collection))
+
+
+class QuerySetNoCache(BaseQuerySet):
+    """A non caching QuerySet"""
+
+    def cache(self):
+        """Convert to a caching queryset
+
+        .. versionadded:: 0.8.3 Convert to caching queryset
+        """
+        return self._clone_into(QuerySet(self._document, self._collection))
+
+    def __repr__(self):
+        """Provides the string representation of the QuerySet
+
+        .. versionchanged:: 0.6.13 Now doesnt modify the cursor
+        """
+        if self._iter:
+            return '.. queryset mid-iteration ..'
+
+        data = []
+        for _ in six.moves.range(REPR_OUTPUT_SIZE + 1):
+            try:
+                data.append(self.next())
+            except StopIteration:
+                break
+
+        if len(data) > REPR_OUTPUT_SIZE:
+            data[-1] = '...(remaining elements truncated)...'
+
+        self.rewind()
+        return repr(data)
+
+    def __iter__(self):
+        queryset = self
+        if queryset._iter:
+            queryset = self.clone()
+        queryset.rewind()
+        return queryset
+
+
+class QuerySetNoDeRef(QuerySet):
+    """Special no_dereference QuerySet"""
+
+    def __dereference(items, max_depth=1, instance=None, name=None):
+        return items

mongoengine/queryset/transform.py

@@ -0,0 +1,463 @@
+from collections import defaultdict
+
+from bson import ObjectId, SON
+from bson.dbref import DBRef
+import pymongo
+import six
+
+from mongoengine.base import UPDATE_OPERATORS
+from mongoengine.common import _import_class
+from mongoengine.connection import get_connection
+from mongoengine.errors import InvalidQueryError
+from mongoengine.python_support import IS_PYMONGO_3
+
+__all__ = ('query', 'update')
+
+COMPARISON_OPERATORS = ('ne', 'gt', 'gte', 'lt', 'lte', 'in', 'nin', 'mod',
+                        'all', 'size', 'exists', 'not', 'elemMatch', 'type')
+GEO_OPERATORS = ('within_distance', 'within_spherical_distance',
+                 'within_box', 'within_polygon', 'near', 'near_sphere',
+                 'max_distance', 'min_distance', 'geo_within', 'geo_within_box',
+                 'geo_within_polygon', 'geo_within_center',
+                 'geo_within_sphere', 'geo_intersects')
+STRING_OPERATORS = ('contains', 'icontains', 'startswith',
+                    'istartswith', 'endswith', 'iendswith',
+                    'exact', 'iexact')
+CUSTOM_OPERATORS = ('match',)
+MATCH_OPERATORS = (COMPARISON_OPERATORS + GEO_OPERATORS +
+                   STRING_OPERATORS + CUSTOM_OPERATORS)
+
+
+# TODO make this less complex
+def query(_doc_cls=None, **kwargs):
+    """Transform a query from Django-style format to Mongo format."""
+    mongo_query = {}
+    merge_query = defaultdict(list)
+    for key, value in sorted(kwargs.items()):
+        if key == '__raw__':
+            mongo_query.update(value)
+            continue
+
+        parts = key.rsplit('__')
+        indices = [(i, p) for i, p in enumerate(parts) if p.isdigit()]
+        parts = [part for part in parts if not part.isdigit()]
+        # Check for an operator and transform to mongo-style if there is
+        op = None
+        if len(parts) > 1 and parts[-1] in MATCH_OPERATORS:
+            op = parts.pop()
+
+        # Allow to escape operator-like field name by __
+        if len(parts) > 1 and parts[-1] == '':
+            parts.pop()
+
+        negate = False
+        if len(parts) > 1 and parts[-1] == 'not':
+            parts.pop()
+            negate = True
+
+        if _doc_cls:
+            # Switch field names to proper names [set in Field(name='foo')]
+            try:
+                fields = _doc_cls._lookup_field(parts)
+            except Exception as e:
+                raise InvalidQueryError(e)
+            parts = []
+
+            CachedReferenceField = _import_class('CachedReferenceField')
+            GenericReferenceField = _import_class('GenericReferenceField')
+
+            cleaned_fields = []
+            for field in fields:
+                append_field = True
+                if isinstance(field, six.string_types):
+                    parts.append(field)
+                    append_field = False
+                # is last and CachedReferenceField
+                elif isinstance(field, CachedReferenceField) and fields[-1] == field:
+                    parts.append('%s._id' % field.db_field)
+                else:
+                    parts.append(field.db_field)
+
+                if append_field:
+                    cleaned_fields.append(field)
+
+            # Convert value to proper value
+            field = cleaned_fields[-1]
+
+            singular_ops = [None, 'ne', 'gt', 'gte', 'lt', 'lte', 'not']
+            singular_ops += STRING_OPERATORS
+            if op in singular_ops:
+                if isinstance(field, six.string_types):
+                    if (op in STRING_OPERATORS and
+                            isinstance(value, six.string_types)):
+                        StringField = _import_class('StringField')
+                        value = StringField.prepare_query_value(op, value)
+                    else:
+                        value = field
+                else:
+                    value = field.prepare_query_value(op, value)
+
+                    if isinstance(field, CachedReferenceField) and value:
+                        value = value['_id']
+
+            elif op in ('in', 'nin', 'all', 'near') and not isinstance(value, dict):
+                # Raise an error if the in/nin/all/near param is not iterable.
+                value = _prepare_query_for_iterable(field, op, value)
+
+            # If we're querying a GenericReferenceField, we need to alter the
+            # key depending on the value:
+            # * If the value is a DBRef, the key should be "field_name._ref".
+            # * If the value is an ObjectId, the key should be "field_name._ref.$id".
+            if isinstance(field, GenericReferenceField):
+                if isinstance(value, DBRef):
+                    parts[-1] += '._ref'
+                elif isinstance(value, ObjectId):
+                    parts[-1] += '._ref.$id'
+
+        # if op and op not in COMPARISON_OPERATORS:
+        if op:
+            if op in GEO_OPERATORS:
+                value = _geo_operator(field, op, value)
+            elif op in ('match', 'elemMatch'):
+                ListField = _import_class('ListField')
+                EmbeddedDocumentField = _import_class('EmbeddedDocumentField')
+                if (
+                    isinstance(value, dict) and
+                    isinstance(field, ListField) and
+                    isinstance(field.field, EmbeddedDocumentField)
+                ):
+                    value = query(field.field.document_type, **value)
+                else:
+                    value = field.prepare_query_value(op, value)
+                value = {'$elemMatch': value}
+            elif op in CUSTOM_OPERATORS:
+                NotImplementedError('Custom method "%s" has not '
+                                    'been implemented' % op)
+            elif op not in STRING_OPERATORS:
+                value = {'$' + op: value}
+
+        if negate:
+            value = {'$not': value}
+
+        for i, part in indices:
+            parts.insert(i, part)
+
+        key = '.'.join(parts)
+
+        if op is None or key not in mongo_query:
+            mongo_query[key] = value
+        elif key in mongo_query:
+            if isinstance(mongo_query[key], dict):
+                mongo_query[key].update(value)
+                # $max/minDistance needs to come last - convert to SON
+                value_dict = mongo_query[key]
+                if ('$maxDistance' in value_dict or '$minDistance' in value_dict) and \
+                        ('$near' in value_dict or '$nearSphere' in value_dict):
+                    value_son = SON()
+                    for k, v in value_dict.iteritems():
+                        if k == '$maxDistance' or k == '$minDistance':
+                            continue
+                        value_son[k] = v
+                    # Required for MongoDB >= 2.6, may fail when combining
+                    # PyMongo 3+ and MongoDB < 2.6
+                    near_embedded = False
+                    for near_op in ('$near', '$nearSphere'):
+                        if isinstance(value_dict.get(near_op), dict) and (
+                                IS_PYMONGO_3 or get_connection().max_wire_version > 1):
+                            value_son[near_op] = SON(value_son[near_op])
+                            if '$maxDistance' in value_dict:
+                                value_son[near_op][
+                                    '$maxDistance'] = value_dict['$maxDistance']
+                            if '$minDistance' in value_dict:
+                                value_son[near_op][
+                                    '$minDistance'] = value_dict['$minDistance']
+                            near_embedded = True
+                    if not near_embedded:
+                        if '$maxDistance' in value_dict:
+                            value_son['$maxDistance'] = value_dict['$maxDistance']
+                        if '$minDistance' in value_dict:
+                            value_son['$minDistance'] = value_dict['$minDistance']
+                    mongo_query[key] = value_son
+            else:
+                # Store for manually merging later
+                merge_query[key].append(value)
+
+    # The queryset has been filter in such a way we must manually merge
+    for k, v in merge_query.items():
+        merge_query[k].append(mongo_query[k])
+        del mongo_query[k]
+        if isinstance(v, list):
+            value = [{k: val} for val in v]
+            if '$and' in mongo_query.keys():
+                mongo_query['$and'].extend(value)
+            else:
+                mongo_query['$and'] = value
+
+    return mongo_query
+
+
+def update(_doc_cls=None, **update):
+    """Transform an update spec from Django-style format to Mongo
+    format.
+    """
+    mongo_update = {}
+    for key, value in update.items():
+        if key == '__raw__':
+            mongo_update.update(value)
+            continue
+        parts = key.split('__')
+        # if there is no operator, default to 'set'
+        if len(parts) < 3 and parts[0] not in UPDATE_OPERATORS:
+            parts.insert(0, 'set')
+        # Check for an operator and transform to mongo-style if there is
+        op = None
+        if parts[0] in UPDATE_OPERATORS:
+            op = parts.pop(0)
+            # Convert Pythonic names to Mongo equivalents
+            if op in ('push_all', 'pull_all'):
+                op = op.replace('_all', 'All')
+            elif op == 'dec':
+                # Support decrement by flipping a positive value's sign
+                # and using 'inc'
+                op = 'inc'
+                value = -value
+            elif op == 'add_to_set':
+                op = 'addToSet'
+            elif op == 'set_on_insert':
+                op = 'setOnInsert'
+
+        match = None
+        if parts[-1] in COMPARISON_OPERATORS:
+            match = parts.pop()
+
+        # Allow to escape operator-like field name by __
+        if len(parts) > 1 and parts[-1] == '':
+            parts.pop()
+
+        if _doc_cls:
+            # Switch field names to proper names [set in Field(name='foo')]
+            try:
+                fields = _doc_cls._lookup_field(parts)
+            except Exception as e:
+                raise InvalidQueryError(e)
+            parts = []
+
+            cleaned_fields = []
+            appended_sub_field = False
+            for field in fields:
+                append_field = True
+                if isinstance(field, six.string_types):
+                    # Convert the S operator to $
+                    if field == 'S':
+                        field = '$'
+                    parts.append(field)
+                    append_field = False
+                else:
+                    parts.append(field.db_field)
+                if append_field:
+                    appended_sub_field = False
+                    cleaned_fields.append(field)
+                    if hasattr(field, 'field'):
+                        cleaned_fields.append(field.field)
+                        appended_sub_field = True
+
+            # Convert value to proper value
+            if appended_sub_field:
+                field = cleaned_fields[-2]
+            else:
+                field = cleaned_fields[-1]
+
+            GeoJsonBaseField = _import_class('GeoJsonBaseField')
+            if isinstance(field, GeoJsonBaseField):
+                value = field.to_mongo(value)
+
+            if op == 'pull':
+                if field.required or value is not None:
+                    if match == 'in' and not isinstance(value, dict):
+                        value = _prepare_query_for_iterable(field, op, value)
+                    else:
+                        value = field.prepare_query_value(op, value)
+            elif op == 'push' and isinstance(value, (list, tuple, set)):
+                value = [field.prepare_query_value(op, v) for v in value]
+            elif op in (None, 'set', 'push'):
+                if field.required or value is not None:
+                    value = field.prepare_query_value(op, value)
+            elif op in ('pushAll', 'pullAll'):
+                value = [field.prepare_query_value(op, v) for v in value]
+            elif op in ('addToSet', 'setOnInsert'):
+                if isinstance(value, (list, tuple, set)):
+                    value = [field.prepare_query_value(op, v) for v in value]
+                elif field.required or value is not None:
+                    value = field.prepare_query_value(op, value)
+            elif op == 'unset':
+                value = 1
+
+        if match:
+            match = '$' + match
+            value = {match: value}
+
+        key = '.'.join(parts)
+
+        if not op:
+            raise InvalidQueryError('Updates must supply an operation '
+                                    'eg: set__FIELD=value')
+
+        if 'pull' in op and '.' in key:
+            # Dot operators don't work on pull operations
+            # unless they point to a list field
+            # Otherwise it uses nested dict syntax
+            if op == 'pullAll':
+                raise InvalidQueryError('pullAll operations only support '
+                                        'a single field depth')
+
+            # Look for the last list field and use dot notation until there
+            field_classes = [c.__class__ for c in cleaned_fields]
+            field_classes.reverse()
+            ListField = _import_class('ListField')
+            EmbeddedDocumentListField = _import_class('EmbeddedDocumentListField')
+            if ListField in field_classes or EmbeddedDocumentListField in field_classes:
+                # Join all fields via dot notation to the last ListField or EmbeddedDocumentListField
+                # Then process as normal
+                if ListField in field_classes:
+                    _check_field = ListField
+                else:
+                    _check_field = EmbeddedDocumentListField
+
+                last_listField = len(
+                    cleaned_fields) - field_classes.index(_check_field)
+                key = '.'.join(parts[:last_listField])
+                parts = parts[last_listField:]
+                parts.insert(0, key)
+
+            parts.reverse()
+            for key in parts:
+                value = {key: value}
+        elif op == 'addToSet' and isinstance(value, list):
+            value = {key: {'$each': value}}
+        elif op in ('push', 'pushAll'):
+            if parts[-1].isdigit():
+                key = parts[0]
+                position = int(parts[-1])
+                # $position expects an iterable. If pushing a single value,
+                # wrap it in a list.
+                if not isinstance(value, (set, tuple, list)):
+                    value = [value]
+                value = {key: {'$each': value, '$position': position}}
+            else:
+                if op == 'pushAll':
+                    op = 'push'  # convert to non-deprecated keyword
+                    if not isinstance(value, (set, tuple, list)):
+                        value = [value]
+                    value = {key: {'$each': value}}
+                else:
+                    value = {key: value}
+        else:
+            value = {key: value}
+        key = '$' + op
+        if key not in mongo_update:
+            mongo_update[key] = value
+        elif key in mongo_update and isinstance(mongo_update[key], dict):
+            mongo_update[key].update(value)
+
+    return mongo_update
+
+
+def _geo_operator(field, op, value):
+    """Helper to return the query for a given geo query."""
+    if op == 'max_distance':
+        value = {'$maxDistance': value}
+    elif op == 'min_distance':
+        value = {'$minDistance': value}
+    elif field._geo_index == pymongo.GEO2D:
+        if op == 'within_distance':
+            value = {'$within': {'$center': value}}
+        elif op == 'within_spherical_distance':
+            value = {'$within': {'$centerSphere': value}}
+        elif op == 'within_polygon':
+            value = {'$within': {'$polygon': value}}
+        elif op == 'near':
+            value = {'$near': value}
+        elif op == 'near_sphere':
+            value = {'$nearSphere': value}
+        elif op == 'within_box':
+            value = {'$within': {'$box': value}}
+        else:
+            raise NotImplementedError('Geo method "%s" has not been '
+                                      'implemented for a GeoPointField' % op)
+    else:
+        if op == 'geo_within':
+            value = {'$geoWithin': _infer_geometry(value)}
+        elif op == 'geo_within_box':
+            value = {'$geoWithin': {'$box': value}}
+        elif op == 'geo_within_polygon':
+            value = {'$geoWithin': {'$polygon': value}}
+        elif op == 'geo_within_center':
+            value = {'$geoWithin': {'$center': value}}
+        elif op == 'geo_within_sphere':
+            value = {'$geoWithin': {'$centerSphere': value}}
+        elif op == 'geo_intersects':
+            value = {'$geoIntersects': _infer_geometry(value)}
+        elif op == 'near':
+            value = {'$near': _infer_geometry(value)}
+        else:
+            raise NotImplementedError(
+                'Geo method "%s" has not been implemented for a %s '
+                % (op, field._name)
+            )
+    return value
+
+
+def _infer_geometry(value):
+    """Helper method that tries to infer the $geometry shape for a
+    given value.
+    """
+    if isinstance(value, dict):
+        if '$geometry' in value:
+            return value
+        elif 'coordinates' in value and 'type' in value:
+            return {'$geometry': value}
+        raise InvalidQueryError('Invalid $geometry dictionary should have '
+                                'type and coordinates keys')
+    elif isinstance(value, (list, set)):
+        # TODO: shouldn't we test value[0][0][0][0] to see if it is MultiPolygon?
+        # TODO: should both TypeError and IndexError be alike interpreted?
+
+        try:
+            value[0][0][0]
+            return {'$geometry': {'type': 'Polygon', 'coordinates': value}}
+        except (TypeError, IndexError):
+            pass
+
+        try:
+            value[0][0]
+            return {'$geometry': {'type': 'LineString', 'coordinates': value}}
+        except (TypeError, IndexError):
+            pass
+
+        try:
+            value[0]
+            return {'$geometry': {'type': 'Point', 'coordinates': value}}
+        except (TypeError, IndexError):
+            pass
+
+    raise InvalidQueryError('Invalid $geometry data. Can be either a '
+                            'dictionary or (nested) lists of coordinate(s)')
+
+
+def _prepare_query_for_iterable(field, op, value):
+    # We need a special check for BaseDocument, because - although it's iterable - using
+    # it as such in the context of this method is most definitely a mistake.
+    BaseDocument = _import_class('BaseDocument')
+
+    if isinstance(value, BaseDocument):
+        raise TypeError("When using the `in`, `nin`, `all`, or "
+                        "`near`-operators you can\'t use a "
+                        "`Document`, you must wrap your object "
+                        "in a list (object -> [object]).")
+
+    if not hasattr(value, '__iter__'):
+        raise TypeError("The `in`, `nin`, `all`, or "
+                        "`near`-operators must be applied to an "
+                        "iterable (e.g. a list).")
+
+    return [field.prepare_query_value(op, v) for v in value]

mongoengine/queryset/visitor.py

@@ -0,0 +1,159 @@
+import copy
+
+from mongoengine.errors import InvalidQueryError
+from mongoengine.queryset import transform
+
+__all__ = ('Q',)
+
+
+class QNodeVisitor(object):
+    """Base visitor class for visiting Q-object nodes in a query tree.
+    """
+
+    def visit_combination(self, combination):
+        """Called by QCombination objects.
+        """
+        return combination
+
+    def visit_query(self, query):
+        """Called by (New)Q objects.
+        """
+        return query
+
+
+class DuplicateQueryConditionsError(InvalidQueryError):
+    pass
+
+
+class SimplificationVisitor(QNodeVisitor):
+    """Simplifies query trees by combining unnecessary 'and' connection nodes
+    into a single Q-object.
+    """
+
+    def visit_combination(self, combination):
+        if combination.operation == combination.AND:
+            # The simplification only applies to 'simple' queries
+            if all(isinstance(node, Q) for node in combination.children):
+                queries = [n.query for n in combination.children]
+                try:
+                    return Q(**self._query_conjunction(queries))
+                except DuplicateQueryConditionsError:
+                    # Cannot be simplified
+                    pass
+        return combination
+
+    def _query_conjunction(self, queries):
+        """Merges query dicts - effectively &ing them together.
+        """
+        query_ops = set()
+        combined_query = {}
+        for query in queries:
+            ops = set(query.keys())
+            # Make sure that the same operation isn't applied more than once
+            # to a single field
+            intersection = ops.intersection(query_ops)
+            if intersection:
+                raise DuplicateQueryConditionsError()
+
+            query_ops.update(ops)
+            combined_query.update(copy.deepcopy(query))
+        return combined_query
+
+
+class QueryCompilerVisitor(QNodeVisitor):
+    """Compiles the nodes in a query tree to a PyMongo-compatible query
+    dictionary.
+    """
+
+    def __init__(self, document):
+        self.document = document
+
+    def visit_combination(self, combination):
+        operator = '$and'
+        if combination.operation == combination.OR:
+            operator = '$or'
+        return {operator: combination.children}
+
+    def visit_query(self, query):
+        return transform.query(self.document, **query.query)
+
+
+class QNode(object):
+    """Base class for nodes in query trees."""
+
+    AND = 0
+    OR = 1
+
+    def to_query(self, document):
+        query = self.accept(SimplificationVisitor())
+        query = query.accept(QueryCompilerVisitor(document))
+        return query
+
+    def accept(self, visitor):
+        raise NotImplementedError
+
+    def _combine(self, other, operation):
+        """Combine this node with another node into a QCombination
+        object.
+        """
+        if getattr(other, 'empty', True):
+            return self
+
+        if self.empty:
+            return other
+
+        return QCombination(operation, [self, other])
+
+    @property
+    def empty(self):
+        return False
+
+    def __or__(self, other):
+        return self._combine(other, self.OR)
+
+    def __and__(self, other):
+        return self._combine(other, self.AND)
+
+
+class QCombination(QNode):
+    """Represents the combination of several conditions by a given
+    logical operator.
+    """
+
+    def __init__(self, operation, children):
+        self.operation = operation
+        self.children = []
+        for node in children:
+            # If the child is a combination of the same type, we can merge its
+            # children directly into this combinations children
+            if isinstance(node, QCombination) and node.operation == operation:
+                self.children += node.children
+            else:
+                self.children.append(node)
+
+    def accept(self, visitor):
+        for i in range(len(self.children)):
+            if isinstance(self.children[i], QNode):
+                self.children[i] = self.children[i].accept(visitor)
+
+        return visitor.visit_combination(self)
+
+    @property
+    def empty(self):
+        return not bool(self.children)
+
+
+class Q(QNode):
+    """A simple query object, used in a query tree to build up more complex
+    query structures.
+    """
+
+    def __init__(self, **query):
+        self.query = query
+
+    def accept(self, visitor):
+        return visitor.visit_query(self)
+
+    @property
+    def empty(self):
+        return not bool(self.query)

mongoengine/signals.py

@@ -1,11 +1,10 @@
-# -*- coding: utf-8 -*-
+__all__ = ('pre_init', 'post_init', 'pre_save', 'pre_save_post_validation',
-
+           'post_save', 'pre_delete', 'post_delete')
-__all__ = ['pre_init', 'post_init', 'pre_save', 'post_save',
-           'pre_delete', 'post_delete']
 
 signals_available = False
 try:
     from blinker import Namespace
+
     signals_available = True
 except ImportError:
     class Namespace(object):
@@ -27,11 +26,13 @@ except ImportError:
             raise RuntimeError('signalling support is unavailable '
                                'because the blinker library is '
                                'not installed.')
-        send = lambda *a, **kw: None
+
+        send = lambda *a, **kw: None  # noqa
         connect = disconnect = has_receivers_for = receivers_for = \
             temporarily_connected_to = _fail
         del _fail
 
+
 # the namespace for code signals.  If you are not mongoengine code, do
 # not put signals in here.  Create your own namespace instead.
 _signals = Namespace()
@@ -39,6 +40,7 @@ _signals = Namespace()
 pre_init = _signals.signal('pre_init')
 post_init = _signals.signal('post_init')
 pre_save = _signals.signal('pre_save')
+pre_save_post_validation = _signals.signal('pre_save_post_validation')
 post_save = _signals.signal('post_save')
 pre_delete = _signals.signal('pre_delete')
 post_delete = _signals.signal('post_delete')

mongoengine/tests.py

@@ -1,59 +0,0 @@
-from mongoengine.connection import get_db
-
-
-class query_counter(object):
-    """ Query_counter contextmanager to get the number of queries. """
-
-    def __init__(self):
-        """ Construct the query_counter. """
-        self.counter = 0
-        self.db = get_db()
-
-    def __enter__(self):
-        """ On every with block we need to drop the profile collection. """
-        self.db.set_profiling_level(0)
-        self.db.system.profile.drop()
-        self.db.set_profiling_level(2)
-        return self
-
-    def __exit__(self, t, value, traceback):
-        """ Reset the profiling level. """
-        self.db.set_profiling_level(0)
-
-    def __eq__(self, value):
-        """ == Compare querycounter. """
-        return value == self._get_count()
-
-    def __ne__(self, value):
-        """ != Compare querycounter. """
-        return not self.__eq__(value)
-
-    def __lt__(self, value):
-        """ < Compare querycounter. """
-        return self._get_count() < value
-
-    def __le__(self, value):
-        """ <= Compare querycounter. """
-        return self._get_count() <= value
-
-    def __gt__(self, value):
-        """ > Compare querycounter. """
-        return self._get_count() > value
-
-    def __ge__(self, value):
-        """ >= Compare querycounter. """
-        return self._get_count() >= value
-
-    def __int__(self):
-        """ int representation. """
-        return self._get_count()
-
-    def __repr__(self):
-        """ repr query_counter as the number of queries. """
-        return u"%s" % self._get_count()
-
-    def _get_count(self):
-        """ Get the number of queries. """
-        count = self.db.system.profile.find().count() - self.counter
-        self.counter += 1
-        return count

python-mongoengine.spec

@@ -5,7 +5,7 @@
 %define srcname mongoengine
 
 Name:           python-%{srcname}
-Version:        0.7rc1
+Version:        0.8.7
 Release:        1%{?dist}
 Summary:        A Python Document-Object Mapper for working with MongoDB
 
@@ -51,4 +51,4 @@ rm -rf $RPM_BUILD_ROOT
 # %{python_sitearch}/*
 
 %changelog
-* See: http://readthedocs.org/docs/mongoengine-odm/en/latest/changelog.html
+* See: http://docs.mongoengine.org/en/latest/changelog.html

requirements.txt

@@ -1 +1,7 @@
-pymongo
+nose
+pymongo>=2.7.1
+six==1.10.0
+flake8
+flake8-import-order
+Sphinx==1.5.5
+sphinx-rtd-theme==0.2.4

setup.cfg

@@ -1,11 +1,11 @@
 [nosetests]
-verbosity = 3
+verbosity=2
 detailed-errors=1
-#with-coverage = 1
+#tests=tests
-#cover-erase = 1
+cover-package=mongoengine
-#cover-html = 1
+
-#cover-html-dir = ../htmlcov
+[flake8]
-#cover-package = mongoengine
+ignore=E501,F401,F403,F405,I201,I202
-py3where = build
+exclude=build,dist,docs,venv,venv3,.tox,.eggs,tests
-where = tests
+max-complexity=47
-#tests =  test_bugfix.py
+application-import-names=mongoengine,tests

setup.py

@@ -1,6 +1,6 @@
 import os
 import sys
-from setuptools import setup, find_packages
+from setuptools import find_packages, setup
 
 # Hack to silence atexit traceback in newer python versions
 try:
@@ -8,20 +8,25 @@ try:
 except ImportError:
     pass
 
-DESCRIPTION = "A Python Document-Object Mapper for working with MongoDB"
+DESCRIPTION = (
+    'MongoEngine is a Python Object-Document '
+    'Mapper for working with MongoDB.'
+)
 
-LONG_DESCRIPTION = None
 try:
-    LONG_DESCRIPTION = open('README.rst').read()
+    with open('README.rst') as fin:
-except:
+        LONG_DESCRIPTION = fin.read()
-    pass
+except Exception:
+    LONG_DESCRIPTION = None
 
 
 def get_version(version_tuple):
-    if not isinstance(version_tuple[-1], int):
+    """Return the version tuple as a string, e.g. for (0, 10, 7),
-        return '.'.join(map(str, version_tuple[:-1])) + version_tuple[-1]
+    return '0.10.7'.
+    """
     return '.'.join(map(str, version_tuple))
 
+
 # Dirty hack to get version number from monogengine/__init__.py - we can't
 # import it as it depends on PyMongo and PyMongo isn't installed until this
 # file is read
@@ -29,7 +34,6 @@ init = os.path.join(os.path.dirname(__file__), 'mongoengine', '__init__.py')
 version_line = list(filter(lambda l: l.startswith('VERSION'), open(init)))[0]
 
 VERSION = get_version(eval(version_line.split('=')[-1]))
-print(VERSION)
 
 CLASSIFIERS = [
     'Development Status :: 4 - Beta',
@@ -38,43 +42,46 @@ CLASSIFIERS = [
     'Operating System :: OS Independent',
     'Programming Language :: Python',
     "Programming Language :: Python :: 2",
-    "Programming Language :: Python :: 2.5",
-    "Programming Language :: Python :: 2.6",
     "Programming Language :: Python :: 2.7",
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.1",
+    "Programming Language :: Python :: 3.3",
-    "Programming Language :: Python :: 3.2",
+    "Programming Language :: Python :: 3.4",
+    "Programming Language :: Python :: 3.5",
     "Programming Language :: Python :: Implementation :: CPython",
+    "Programming Language :: Python :: Implementation :: PyPy",
     'Topic :: Database',
     'Topic :: Software Development :: Libraries :: Python Modules',
 ]
 
-extra_opts = {}
+extra_opts = {
+    'packages': find_packages(exclude=['tests', 'tests.*']),
+    'tests_require': ['nose', 'coverage==4.2', 'blinker', 'Pillow>=2.0.0']
+}
 if sys.version_info[0] == 3:
     extra_opts['use_2to3'] = True
-    extra_opts['tests_require'] = ['nose', 'coverage', 'blinker']
+    if 'test' in sys.argv or 'nosetests' in sys.argv:
-    extra_opts['packages'] = find_packages(exclude=('tests',))
+        extra_opts['packages'] = find_packages()
-    if "test" in sys.argv or "nosetests" in sys.argv:
+        extra_opts['package_data'] = {
-        extra_opts['packages'].append("tests")
+            'tests': ['fields/mongoengine.png', 'fields/mongodb_leaf.png']}
-        extra_opts['package_data'] = {"tests": ["mongoengine.png"]}
 else:
-    extra_opts['tests_require'] = ['nose', 'coverage', 'blinker', 'django>=1.3', 'PIL']
+    extra_opts['tests_require'] += ['python-dateutil']
-    extra_opts['packages'] = find_packages(exclude=('tests',))
 
-setup(name='mongoengine',
+setup(
+    name='mongoengine',
     version=VERSION,
     author='Harry Marr',
-      author_email='harry.marr@{nospam}gmail.com',
+    author_email='harry.marr@gmail.com',
-      maintainer="Ross Lawley",
+    maintainer="Stefan Wojcik",
-      maintainer_email="ross.lawley@{nospam}gmail.com",
+    maintainer_email="wojcikstefan@gmail.com",
     url='http://mongoengine.org/',
+    download_url='https://github.com/MongoEngine/mongoengine/tarball/master',
     license='MIT',
     include_package_data=True,
     description=DESCRIPTION,
     long_description=LONG_DESCRIPTION,
     platforms=['any'],
     classifiers=CLASSIFIERS,
-      install_requires=['pymongo'],
+    install_requires=['pymongo>=2.7.1', 'six'],
     test_suite='nose.collector',
     **extra_opts
 )

tests/__init__.py

@@ -0,0 +1,4 @@
+from all_warnings import AllWarnings
+from document import *
+from queryset import *
+from fields import *

tests/all_warnings/__init__.py

@@ -0,0 +1,42 @@
+"""
+This test has been put into a module.  This is because it tests warnings that
+only get triggered on first hit.  This way we can ensure its imported into the
+top level and called first by the test suite.
+"""
+import unittest
+import warnings
+
+from mongoengine import *
+
+
+__all__ = ('AllWarnings', )
+
+
+class AllWarnings(unittest.TestCase):
+
+    def setUp(self):
+        connect(db='mongoenginetest')
+        self.warning_list = []
+        self.showwarning_default = warnings.showwarning
+        warnings.showwarning = self.append_to_warning_list
+
+    def append_to_warning_list(self, message, category, *args):
+        self.warning_list.append({"message": message,
+                                  "category": category})
+
+    def tearDown(self):
+        # restore default handling of warnings
+        warnings.showwarning = self.showwarning_default
+
+    def test_document_collection_syntax_warning(self):
+
+        class NonAbstractBase(Document):
+            meta = {'allow_inheritance': True}
+
+        class InheritedDocumentFailTest(NonAbstractBase):
+            meta = {'collection': 'fail'}
+
+        warning = self.warning_list[0]
+        self.assertEqual(SyntaxWarning, warning["category"])
+        self.assertEqual('non_abstract_base',
+                         InheritedDocumentFailTest._get_collection_name())

tests/document/__init__.py

@@ -0,0 +1,13 @@
+import unittest
+
+from class_methods import *
+from delta import *
+from dynamic import *
+from indexes import *
+from inheritance import *
+from instance import *
+from json_serialisation import *
+from validation import *
+
+if __name__ == '__main__':
+    unittest.main()

tests/document/class_methods.py

@@ -0,0 +1,371 @@
+# -*- coding: utf-8 -*-
+import unittest
+
+from mongoengine import *
+
+from mongoengine.queryset import NULLIFY, PULL
+from mongoengine.connection import get_db
+from tests.utils import needs_mongodb_v26
+
+__all__ = ("ClassMethodsTest", )
+
+
+class ClassMethodsTest(unittest.TestCase):
+
+    def setUp(self):
+        connect(db='mongoenginetest')
+        self.db = get_db()
+
+        class Person(Document):
+            name = StringField()
+            age = IntField()
+
+            non_field = True
+
+            meta = {"allow_inheritance": True}
+
+        self.Person = Person
+
+    def tearDown(self):
+        for collection in self.db.collection_names():
+            if 'system.' in collection:
+                continue
+            self.db.drop_collection(collection)
+
+    def test_definition(self):
+        """Ensure that document may be defined using fields.
+        """
+        self.assertEqual(['_cls', 'age', 'id', 'name'],
+                         sorted(self.Person._fields.keys()))
+        self.assertEqual(["IntField", "ObjectIdField", "StringField", "StringField"],
+                        sorted([x.__class__.__name__ for x in
+                                self.Person._fields.values()]))
+
+    def test_get_db(self):
+        """Ensure that get_db returns the expected db.
+        """
+        db = self.Person._get_db()
+        self.assertEqual(self.db, db)
+
+    def test_get_collection_name(self):
+        """Ensure that get_collection_name returns the expected collection
+        name.
+        """
+        collection_name = 'person'
+        self.assertEqual(collection_name, self.Person._get_collection_name())
+
+    def test_get_collection(self):
+        """Ensure that get_collection returns the expected collection.
+        """
+        collection_name = 'person'
+        collection = self.Person._get_collection()
+        self.assertEqual(self.db[collection_name], collection)
+
+    def test_drop_collection(self):
+        """Ensure that the collection may be dropped from the database.
+        """
+        collection_name = 'person'
+        self.Person(name='Test').save()
+        self.assertTrue(collection_name in self.db.collection_names())
+
+        self.Person.drop_collection()
+        self.assertFalse(collection_name in self.db.collection_names())
+
+    def test_register_delete_rule(self):
+        """Ensure that register delete rule adds a delete rule to the document
+        meta.
+        """
+        class Job(Document):
+            employee = ReferenceField(self.Person)
+
+        self.assertEqual(self.Person._meta.get('delete_rules'), None)
+
+        self.Person.register_delete_rule(Job, 'employee', NULLIFY)
+        self.assertEqual(self.Person._meta['delete_rules'],
+                         {(Job, 'employee'): NULLIFY})
+
+    def test_compare_indexes(self):
+        """ Ensure that the indexes are properly created and that
+        compare_indexes identifies the missing/extra indexes
+        """
+
+        class BlogPost(Document):
+            author = StringField()
+            title = StringField()
+            description = StringField()
+            tags = StringField()
+
+            meta = {
+                'indexes': [('author', 'title')]
+            }
+
+        BlogPost.drop_collection()
+
+        BlogPost.ensure_indexes()
+        self.assertEqual(BlogPost.compare_indexes(), { 'missing': [], 'extra': [] })
+
+        BlogPost.ensure_index(['author', 'description'])
+        self.assertEqual(BlogPost.compare_indexes(), { 'missing': [], 'extra': [[('author', 1), ('description', 1)]] })
+
+        BlogPost._get_collection().drop_index('author_1_description_1')
+        self.assertEqual(BlogPost.compare_indexes(), { 'missing': [], 'extra': [] })
+
+        BlogPost._get_collection().drop_index('author_1_title_1')
+        self.assertEqual(BlogPost.compare_indexes(), { 'missing': [[('author', 1), ('title', 1)]], 'extra': [] })
+
+    def test_compare_indexes_inheritance(self):
+        """ Ensure that the indexes are properly created and that
+        compare_indexes identifies the missing/extra indexes for subclassed
+        documents (_cls included)
+        """
+
+        class BlogPost(Document):
+            author = StringField()
+            title = StringField()
+            description = StringField()
+
+            meta = {
+                'allow_inheritance': True
+            }
+
+        class BlogPostWithTags(BlogPost):
+            tags = StringField()
+            tag_list = ListField(StringField())
+
+            meta = {
+                'indexes': [('author', 'tags')]
+            }
+
+        BlogPost.drop_collection()
+
+        BlogPost.ensure_indexes()
+        BlogPostWithTags.ensure_indexes()
+        self.assertEqual(BlogPost.compare_indexes(), { 'missing': [], 'extra': [] })
+
+        BlogPostWithTags.ensure_index(['author', 'tag_list'])
+        self.assertEqual(BlogPost.compare_indexes(), { 'missing': [], 'extra': [[('_cls', 1), ('author', 1), ('tag_list', 1)]] })
+
+        BlogPostWithTags._get_collection().drop_index('_cls_1_author_1_tag_list_1')
+        self.assertEqual(BlogPost.compare_indexes(), { 'missing': [], 'extra': [] })
+
+        BlogPostWithTags._get_collection().drop_index('_cls_1_author_1_tags_1')
+        self.assertEqual(BlogPost.compare_indexes(), { 'missing': [[('_cls', 1), ('author', 1), ('tags', 1)]], 'extra': [] })
+
+    def test_compare_indexes_multiple_subclasses(self):
+        """ Ensure that compare_indexes behaves correctly if called from a
+        class, which base class has multiple subclasses
+        """
+
+        class BlogPost(Document):
+            author = StringField()
+            title = StringField()
+            description = StringField()
+
+            meta = {
+                'allow_inheritance': True
+            }
+
+        class BlogPostWithTags(BlogPost):
+            tags = StringField()
+            tag_list = ListField(StringField())
+
+            meta = {
+                'indexes': [('author', 'tags')]
+            }
+
+        class BlogPostWithCustomField(BlogPost):
+            custom = DictField()
+
+            meta = {
+                'indexes': [('author', 'custom')]
+            }
+
+        BlogPost.ensure_indexes()
+        BlogPostWithTags.ensure_indexes()
+        BlogPostWithCustomField.ensure_indexes()
+
+        self.assertEqual(BlogPost.compare_indexes(), { 'missing': [], 'extra': [] })
+        self.assertEqual(BlogPostWithTags.compare_indexes(), { 'missing': [], 'extra': [] })
+        self.assertEqual(BlogPostWithCustomField.compare_indexes(), { 'missing': [], 'extra': [] })
+
+    @needs_mongodb_v26
+    def test_compare_indexes_for_text_indexes(self):
+        """ Ensure that compare_indexes behaves correctly for text indexes """
+
+        class Doc(Document):
+            a = StringField()
+            b = StringField()
+            meta = {'indexes': [
+                {'fields': ['$a', "$b"],
+                 'default_language': 'english',
+                 'weights': {'a': 10, 'b': 2}
+                }
+            ]}
+
+        Doc.drop_collection()
+        Doc.ensure_indexes()
+        actual = Doc.compare_indexes()
+        expected = {'missing': [], 'extra': []}
+        self.assertEqual(actual, expected)
+
+    def test_list_indexes_inheritance(self):
+        """ ensure that all of the indexes are listed regardless of the super-
+        or sub-class that we call it from
+        """
+
+        class BlogPost(Document):
+            author = StringField()
+            title = StringField()
+            description = StringField()
+
+            meta = {
+                'allow_inheritance': True
+            }
+
+        class BlogPostWithTags(BlogPost):
+            tags = StringField()
+
+            meta = {
+                'indexes': [('author', 'tags')]
+            }
+
+        class BlogPostWithTagsAndExtraText(BlogPostWithTags):
+            extra_text = StringField()
+
+            meta = {
+                'indexes': [('author', 'tags', 'extra_text')]
+            }
+
+        BlogPost.drop_collection()
+
+        BlogPost.ensure_indexes()
+        BlogPostWithTags.ensure_indexes()
+        BlogPostWithTagsAndExtraText.ensure_indexes()
+
+        self.assertEqual(BlogPost.list_indexes(),
+                         BlogPostWithTags.list_indexes())
+        self.assertEqual(BlogPost.list_indexes(),
+                         BlogPostWithTagsAndExtraText.list_indexes())
+        self.assertEqual(BlogPost.list_indexes(),
+                         [[('_cls', 1), ('author', 1), ('tags', 1)],
+                         [('_cls', 1), ('author', 1), ('tags', 1), ('extra_text', 1)],
+                         [(u'_id', 1)], [('_cls', 1)]])
+
+    def test_register_delete_rule_inherited(self):
+
+        class Vaccine(Document):
+            name = StringField(required=True)
+
+            meta = {"indexes": ["name"]}
+
+        class Animal(Document):
+            family = StringField(required=True)
+            vaccine_made = ListField(ReferenceField("Vaccine", reverse_delete_rule=PULL))
+
+            meta = {"allow_inheritance": True, "indexes": ["family"]}
+
+        class Cat(Animal):
+            name = StringField(required=True)
+
+        self.assertEqual(Vaccine._meta['delete_rules'][(Animal, 'vaccine_made')], PULL)
+        self.assertEqual(Vaccine._meta['delete_rules'][(Cat, 'vaccine_made')], PULL)
+
+    def test_collection_naming(self):
+        """Ensure that a collection with a specified name may be used.
+        """
+
+        class DefaultNamingTest(Document):
+            pass
+        self.assertEqual('default_naming_test',
+                         DefaultNamingTest._get_collection_name())
+
+        class CustomNamingTest(Document):
+            meta = {'collection': 'pimp_my_collection'}
+
+        self.assertEqual('pimp_my_collection',
+                         CustomNamingTest._get_collection_name())
+
+        class DynamicNamingTest(Document):
+            meta = {'collection': lambda c: "DYNAMO"}
+        self.assertEqual('DYNAMO', DynamicNamingTest._get_collection_name())
+
+        # Use Abstract class to handle backwards compatibility
+        class BaseDocument(Document):
+            meta = {
+                'abstract': True,
+                'collection': lambda c: c.__name__.lower()
+            }
+
+        class OldNamingConvention(BaseDocument):
+            pass
+        self.assertEqual('oldnamingconvention',
+                         OldNamingConvention._get_collection_name())
+
+        class InheritedAbstractNamingTest(BaseDocument):
+            meta = {'collection': 'wibble'}
+        self.assertEqual('wibble',
+                         InheritedAbstractNamingTest._get_collection_name())
+
+        # Mixin tests
+        class BaseMixin(object):
+            meta = {
+                'collection': lambda c: c.__name__.lower()
+            }
+
+        class OldMixinNamingConvention(Document, BaseMixin):
+            pass
+        self.assertEqual('oldmixinnamingconvention',
+                          OldMixinNamingConvention._get_collection_name())
+
+        class BaseMixin(object):
+            meta = {
+                'collection': lambda c: c.__name__.lower()
+            }
+
+        class BaseDocument(Document, BaseMixin):
+            meta = {'allow_inheritance': True}
+
+        class MyDocument(BaseDocument):
+            pass
+
+        self.assertEqual('basedocument', MyDocument._get_collection_name())
+
+    def test_custom_collection_name_operations(self):
+        """Ensure that a collection with a specified name is used as expected.
+        """
+        collection_name = 'personCollTest'
+
+        class Person(Document):
+            name = StringField()
+            meta = {'collection': collection_name}
+
+        Person(name="Test User").save()
+        self.assertTrue(collection_name in self.db.collection_names())
+
+        user_obj = self.db[collection_name].find_one()
+        self.assertEqual(user_obj['name'], "Test User")
+
+        user_obj = Person.objects[0]
+        self.assertEqual(user_obj.name, "Test User")
+
+        Person.drop_collection()
+        self.assertFalse(collection_name in self.db.collection_names())
+
+    def test_collection_name_and_primary(self):
+        """Ensure that a collection with a specified name may be used.
+        """
+
+        class Person(Document):
+            name = StringField(primary_key=True)
+            meta = {'collection': 'app'}
+
+        Person(name="Test User").save()
+
+        user_obj = Person.objects.first()
+        self.assertEqual(user_obj.name, "Test User")
+
+        Person.drop_collection()
+
+
+if __name__ == '__main__':
+    unittest.main()

tests/document/delta.py

@@ -0,0 +1,867 @@
+# -*- coding: utf-8 -*-
+import unittest
+
+from bson import SON
+from mongoengine import *
+from mongoengine.connection import get_db
+
+__all__ = ("DeltaTest",)
+
+
+class DeltaTest(unittest.TestCase):
+
+    def setUp(self):
+        connect(db='mongoenginetest')
+        self.db = get_db()
+
+        class Person(Document):
+            name = StringField()
+            age = IntField()
+
+            non_field = True
+
+            meta = {"allow_inheritance": True}
+
+        self.Person = Person
+
+    def tearDown(self):
+        for collection in self.db.collection_names():
+            if 'system.' in collection:
+                continue
+            self.db.drop_collection(collection)
+
+    def test_delta(self):
+        self.delta(Document)
+        self.delta(DynamicDocument)
+
+    def delta(self, DocClass):
+
+        class Doc(DocClass):
+            string_field = StringField()
+            int_field = IntField()
+            dict_field = DictField()
+            list_field = ListField()
+
+        Doc.drop_collection()
+        doc = Doc()
+        doc.save()
+
+        doc = Doc.objects.first()
+        self.assertEqual(doc._get_changed_fields(), [])
+        self.assertEqual(doc._delta(), ({}, {}))
+
+        doc.string_field = 'hello'
+        self.assertEqual(doc._get_changed_fields(), ['string_field'])
+        self.assertEqual(doc._delta(), ({'string_field': 'hello'}, {}))
+
+        doc._changed_fields = []
+        doc.int_field = 1
+        self.assertEqual(doc._get_changed_fields(), ['int_field'])
+        self.assertEqual(doc._delta(), ({'int_field': 1}, {}))
+
+        doc._changed_fields = []
+        dict_value = {'hello': 'world', 'ping': 'pong'}
+        doc.dict_field = dict_value
+        self.assertEqual(doc._get_changed_fields(), ['dict_field'])
+        self.assertEqual(doc._delta(), ({'dict_field': dict_value}, {}))
+
+        doc._changed_fields = []
+        list_value = ['1', 2, {'hello': 'world'}]
+        doc.list_field = list_value
+        self.assertEqual(doc._get_changed_fields(), ['list_field'])
+        self.assertEqual(doc._delta(), ({'list_field': list_value}, {}))
+
+        # Test unsetting
+        doc._changed_fields = []
+        doc.dict_field = {}
+        self.assertEqual(doc._get_changed_fields(), ['dict_field'])
+        self.assertEqual(doc._delta(), ({}, {'dict_field': 1}))
+
+        doc._changed_fields = []
+        doc.list_field = []
+        self.assertEqual(doc._get_changed_fields(), ['list_field'])
+        self.assertEqual(doc._delta(), ({}, {'list_field': 1}))
+
+    def test_delta_recursive(self):
+        self.delta_recursive(Document, EmbeddedDocument)
+        self.delta_recursive(DynamicDocument, EmbeddedDocument)
+        self.delta_recursive(Document, DynamicEmbeddedDocument)
+        self.delta_recursive(DynamicDocument, DynamicEmbeddedDocument)
+
+    def delta_recursive(self, DocClass, EmbeddedClass):
+
+        class Embedded(EmbeddedClass):
+            id = StringField()
+            string_field = StringField()
+            int_field = IntField()
+            dict_field = DictField()
+            list_field = ListField()
+
+        class Doc(DocClass):
+            string_field = StringField()
+            int_field = IntField()
+            dict_field = DictField()
+            list_field = ListField()
+            embedded_field = EmbeddedDocumentField(Embedded)
+
+        Doc.drop_collection()
+        doc = Doc()
+        doc.save()
+
+        doc = Doc.objects.first()
+        self.assertEqual(doc._get_changed_fields(), [])
+        self.assertEqual(doc._delta(), ({}, {}))
+
+        embedded_1 = Embedded()
+        embedded_1.id = "010101"
+        embedded_1.string_field = 'hello'
+        embedded_1.int_field = 1
+        embedded_1.dict_field = {'hello': 'world'}
+        embedded_1.list_field = ['1', 2, {'hello': 'world'}]
+        doc.embedded_field = embedded_1
+
+        self.assertEqual(doc._get_changed_fields(), ['embedded_field'])
+
+        embedded_delta = {
+            'id': "010101",
+            'string_field': 'hello',
+            'int_field': 1,
+            'dict_field': {'hello': 'world'},
+            'list_field': ['1', 2, {'hello': 'world'}]
+        }
+        self.assertEqual(doc.embedded_field._delta(), (embedded_delta, {}))
+        self.assertEqual(doc._delta(),
+                         ({'embedded_field': embedded_delta}, {}))
+
+        doc.save()
+        doc = doc.reload(10)
+
+        doc.embedded_field.dict_field = {}
+        self.assertEqual(doc._get_changed_fields(),
+                         ['embedded_field.dict_field'])
+        self.assertEqual(doc.embedded_field._delta(), ({}, {'dict_field': 1}))
+        self.assertEqual(doc._delta(), ({}, {'embedded_field.dict_field': 1}))
+        doc.save()
+        doc = doc.reload(10)
+        self.assertEqual(doc.embedded_field.dict_field, {})
+
+        doc.embedded_field.list_field = []
+        self.assertEqual(doc._get_changed_fields(),
+                         ['embedded_field.list_field'])
+        self.assertEqual(doc.embedded_field._delta(), ({}, {'list_field': 1}))
+        self.assertEqual(doc._delta(), ({}, {'embedded_field.list_field': 1}))
+        doc.save()
+        doc = doc.reload(10)
+        self.assertEqual(doc.embedded_field.list_field, [])
+
+        embedded_2 = Embedded()
+        embedded_2.string_field = 'hello'
+        embedded_2.int_field = 1
+        embedded_2.dict_field = {'hello': 'world'}
+        embedded_2.list_field = ['1', 2, {'hello': 'world'}]
+
+        doc.embedded_field.list_field = ['1', 2, embedded_2]
+        self.assertEqual(doc._get_changed_fields(),
+                         ['embedded_field.list_field'])
+
+        self.assertEqual(doc.embedded_field._delta(), ({
+            'list_field': ['1', 2, {
+                '_cls': 'Embedded',
+                'string_field': 'hello',
+                'dict_field': {'hello': 'world'},
+                'int_field': 1,
+                'list_field': ['1', 2, {'hello': 'world'}],
+            }]
+        }, {}))
+
+        self.assertEqual(doc._delta(), ({
+            'embedded_field.list_field': ['1', 2, {
+                '_cls': 'Embedded',
+                'string_field': 'hello',
+                'dict_field': {'hello': 'world'},
+                'int_field': 1,
+                'list_field': ['1', 2, {'hello': 'world'}],
+            }]
+        }, {}))
+        doc.save()
+        doc = doc.reload(10)
+
+        self.assertEqual(doc.embedded_field.list_field[0], '1')
+        self.assertEqual(doc.embedded_field.list_field[1], 2)
+        for k in doc.embedded_field.list_field[2]._fields:
+            self.assertEqual(doc.embedded_field.list_field[2][k],
+                             embedded_2[k])
+
+        doc.embedded_field.list_field[2].string_field = 'world'
+        self.assertEqual(doc._get_changed_fields(),
+                         ['embedded_field.list_field.2.string_field'])
+        self.assertEqual(doc.embedded_field._delta(),
+                         ({'list_field.2.string_field': 'world'}, {}))
+        self.assertEqual(doc._delta(),
+                         ({'embedded_field.list_field.2.string_field': 'world'}, {}))
+        doc.save()
+        doc = doc.reload(10)
+        self.assertEqual(doc.embedded_field.list_field[2].string_field,
+                         'world')
+
+        # Test multiple assignments
+        doc.embedded_field.list_field[2].string_field = 'hello world'
+        doc.embedded_field.list_field[2] = doc.embedded_field.list_field[2]
+        self.assertEqual(doc._get_changed_fields(),
+                         ['embedded_field.list_field.2'])
+        self.assertEqual(doc.embedded_field._delta(), ({'list_field.2': {
+                '_cls': 'Embedded',
+                'string_field': 'hello world',
+                'int_field': 1,
+                'list_field': ['1', 2, {'hello': 'world'}],
+                'dict_field': {'hello': 'world'}}
+            }, {}))
+        self.assertEqual(doc._delta(), ({'embedded_field.list_field.2': {
+                '_cls': 'Embedded',
+                'string_field': 'hello world',
+                'int_field': 1,
+                'list_field': ['1', 2, {'hello': 'world'}],
+                'dict_field': {'hello': 'world'}}
+            }, {}))
+        doc.save()
+        doc = doc.reload(10)
+        self.assertEqual(doc.embedded_field.list_field[2].string_field,
+                         'hello world')
+
+        # Test list native methods
+        doc.embedded_field.list_field[2].list_field.pop(0)
+        self.assertEqual(doc._delta(),
+                         ({'embedded_field.list_field.2.list_field':
+                          [2, {'hello': 'world'}]}, {}))
+        doc.save()
+        doc = doc.reload(10)
+
+        doc.embedded_field.list_field[2].list_field.append(1)
+        self.assertEqual(doc._delta(),
+                         ({'embedded_field.list_field.2.list_field':
+                          [2, {'hello': 'world'}, 1]}, {}))
+        doc.save()
+        doc = doc.reload(10)
+        self.assertEqual(doc.embedded_field.list_field[2].list_field,
+                         [2, {'hello': 'world'}, 1])
+
+        doc.embedded_field.list_field[2].list_field.sort(key=str)
+        doc.save()
+        doc = doc.reload(10)
+        self.assertEqual(doc.embedded_field.list_field[2].list_field,
+                         [1, 2, {'hello': 'world'}])
+
+        del doc.embedded_field.list_field[2].list_field[2]['hello']
+        self.assertEqual(doc._delta(),
+                         ({}, {'embedded_field.list_field.2.list_field.2.hello': 1}))
+        doc.save()
+        doc = doc.reload(10)
+
+        del doc.embedded_field.list_field[2].list_field
+        self.assertEqual(doc._delta(),
+                         ({}, {'embedded_field.list_field.2.list_field': 1}))
+
+        doc.save()
+        doc = doc.reload(10)
+
+        doc.dict_field['Embedded'] = embedded_1
+        doc.save()
+        doc = doc.reload(10)
+
+        doc.dict_field['Embedded'].string_field = 'Hello World'
+        self.assertEqual(doc._get_changed_fields(),
+                         ['dict_field.Embedded.string_field'])
+        self.assertEqual(doc._delta(),
+                         ({'dict_field.Embedded.string_field': 'Hello World'}, {}))
+
+    def test_circular_reference_deltas(self):
+        self.circular_reference_deltas(Document, Document)
+        self.circular_reference_deltas(Document, DynamicDocument)
+        self.circular_reference_deltas(DynamicDocument, Document)
+        self.circular_reference_deltas(DynamicDocument, DynamicDocument)
+
+    def circular_reference_deltas(self, DocClass1, DocClass2):
+
+        class Person(DocClass1):
+            name = StringField()
+            owns = ListField(ReferenceField('Organization'))
+
+        class Organization(DocClass2):
+            name = StringField()
+            owner = ReferenceField('Person')
+
+        Person.drop_collection()
+        Organization.drop_collection()
+
+        person = Person(name="owner").save()
+        organization = Organization(name="company").save()
+
+        person.owns.append(organization)
+        organization.owner = person
+
+        person.save()
+        organization.save()
+
+        p = Person.objects[0].select_related()
+        o = Organization.objects.first()
+        self.assertEqual(p.owns[0], o)
+        self.assertEqual(o.owner, p)
+
+    def test_circular_reference_deltas_2(self):
+        self.circular_reference_deltas_2(Document, Document)
+        self.circular_reference_deltas_2(Document, DynamicDocument)
+        self.circular_reference_deltas_2(DynamicDocument, Document)
+        self.circular_reference_deltas_2(DynamicDocument, DynamicDocument)
+
+    def circular_reference_deltas_2(self, DocClass1, DocClass2, dbref=True):
+
+        class Person(DocClass1):
+            name = StringField()
+            owns = ListField(ReferenceField('Organization', dbref=dbref))
+            employer = ReferenceField('Organization', dbref=dbref)
+
+        class Organization(DocClass2):
+            name = StringField()
+            owner = ReferenceField('Person', dbref=dbref)
+            employees = ListField(ReferenceField('Person', dbref=dbref))
+
+        Person.drop_collection()
+        Organization.drop_collection()
+
+        person = Person(name="owner").save()
+        employee = Person(name="employee").save()
+        organization = Organization(name="company").save()
+
+        person.owns.append(organization)
+        organization.owner = person
+
+        organization.employees.append(employee)
+        employee.employer = organization
+
+        person.save()
+        organization.save()
+        employee.save()
+
+        p = Person.objects.get(name="owner")
+        e = Person.objects.get(name="employee")
+        o = Organization.objects.first()
+
+        self.assertEqual(p.owns[0], o)
+        self.assertEqual(o.owner, p)
+        self.assertEqual(e.employer, o)
+
+        return person, organization, employee
+
+    def test_delta_db_field(self):
+        self.delta_db_field(Document)
+        self.delta_db_field(DynamicDocument)
+
+    def delta_db_field(self, DocClass):
+
+        class Doc(DocClass):
+            string_field = StringField(db_field='db_string_field')
+            int_field = IntField(db_field='db_int_field')
+            dict_field = DictField(db_field='db_dict_field')
+            list_field = ListField(db_field='db_list_field')
+
+        Doc.drop_collection()
+        doc = Doc()
+        doc.save()
+
+        doc = Doc.objects.first()
+        self.assertEqual(doc._get_changed_fields(), [])
+        self.assertEqual(doc._delta(), ({}, {}))
+
+        doc.string_field = 'hello'
+        self.assertEqual(doc._get_changed_fields(), ['db_string_field'])
+        self.assertEqual(doc._delta(), ({'db_string_field': 'hello'}, {}))
+
+        doc._changed_fields = []
+        doc.int_field = 1
+        self.assertEqual(doc._get_changed_fields(), ['db_int_field'])
+        self.assertEqual(doc._delta(), ({'db_int_field': 1}, {}))
+
+        doc._changed_fields = []
+        dict_value = {'hello': 'world', 'ping': 'pong'}
+        doc.dict_field = dict_value
+        self.assertEqual(doc._get_changed_fields(), ['db_dict_field'])
+        self.assertEqual(doc._delta(), ({'db_dict_field': dict_value}, {}))
+
+        doc._changed_fields = []
+        list_value = ['1', 2, {'hello': 'world'}]
+        doc.list_field = list_value
+        self.assertEqual(doc._get_changed_fields(), ['db_list_field'])
+        self.assertEqual(doc._delta(), ({'db_list_field': list_value}, {}))
+
+        # Test unsetting
+        doc._changed_fields = []
+        doc.dict_field = {}
+        self.assertEqual(doc._get_changed_fields(), ['db_dict_field'])
+        self.assertEqual(doc._delta(), ({}, {'db_dict_field': 1}))
+
+        doc._changed_fields = []
+        doc.list_field = []
+        self.assertEqual(doc._get_changed_fields(), ['db_list_field'])
+        self.assertEqual(doc._delta(), ({}, {'db_list_field': 1}))
+
+        # Test it saves that data
+        doc = Doc()
+        doc.save()
+
+        doc.string_field = 'hello'
+        doc.int_field = 1
+        doc.dict_field = {'hello': 'world'}
+        doc.list_field = ['1', 2, {'hello': 'world'}]
+        doc.save()
+        doc = doc.reload(10)
+
+        self.assertEqual(doc.string_field, 'hello')
+        self.assertEqual(doc.int_field, 1)
+        self.assertEqual(doc.dict_field, {'hello': 'world'})
+        self.assertEqual(doc.list_field, ['1', 2, {'hello': 'world'}])
+
+    def test_delta_recursive_db_field(self):
+        self.delta_recursive_db_field(Document, EmbeddedDocument)
+        self.delta_recursive_db_field(Document, DynamicEmbeddedDocument)
+        self.delta_recursive_db_field(DynamicDocument, EmbeddedDocument)
+        self.delta_recursive_db_field(DynamicDocument, DynamicEmbeddedDocument)
+
+    def delta_recursive_db_field(self, DocClass, EmbeddedClass):
+
+        class Embedded(EmbeddedClass):
+            string_field = StringField(db_field='db_string_field')
+            int_field = IntField(db_field='db_int_field')
+            dict_field = DictField(db_field='db_dict_field')
+            list_field = ListField(db_field='db_list_field')
+
+        class Doc(DocClass):
+            string_field = StringField(db_field='db_string_field')
+            int_field = IntField(db_field='db_int_field')
+            dict_field = DictField(db_field='db_dict_field')
+            list_field = ListField(db_field='db_list_field')
+            embedded_field = EmbeddedDocumentField(Embedded,
+                                    db_field='db_embedded_field')
+
+        Doc.drop_collection()
+        doc = Doc()
+        doc.save()
+
+        doc = Doc.objects.first()
+        self.assertEqual(doc._get_changed_fields(), [])
+        self.assertEqual(doc._delta(), ({}, {}))
+
+        embedded_1 = Embedded()
+        embedded_1.string_field = 'hello'
+        embedded_1.int_field = 1
+        embedded_1.dict_field = {'hello': 'world'}
+        embedded_1.list_field = ['1', 2, {'hello': 'world'}]
+        doc.embedded_field = embedded_1
+
+        self.assertEqual(doc._get_changed_fields(), ['db_embedded_field'])
+
+        embedded_delta = {
+            'db_string_field': 'hello',
+            'db_int_field': 1,
+            'db_dict_field': {'hello': 'world'},
+            'db_list_field': ['1', 2, {'hello': 'world'}]
+        }
+        self.assertEqual(doc.embedded_field._delta(), (embedded_delta, {}))
+        self.assertEqual(doc._delta(),
+            ({'db_embedded_field': embedded_delta}, {}))
+
+        doc.save()
+        doc = doc.reload(10)
+
+        doc.embedded_field.dict_field = {}
+        self.assertEqual(doc._get_changed_fields(),
+            ['db_embedded_field.db_dict_field'])
+        self.assertEqual(doc.embedded_field._delta(),
+            ({}, {'db_dict_field': 1}))
+        self.assertEqual(doc._delta(),
+            ({}, {'db_embedded_field.db_dict_field': 1}))
+        doc.save()
+        doc = doc.reload(10)
+        self.assertEqual(doc.embedded_field.dict_field, {})
+
+        doc.embedded_field.list_field = []
+        self.assertEqual(doc._get_changed_fields(),
+            ['db_embedded_field.db_list_field'])
+        self.assertEqual(doc.embedded_field._delta(),
+            ({}, {'db_list_field': 1}))
+        self.assertEqual(doc._delta(),
+            ({}, {'db_embedded_field.db_list_field': 1}))
+        doc.save()
+        doc = doc.reload(10)
+        self.assertEqual(doc.embedded_field.list_field, [])
+
+        embedded_2 = Embedded()
+        embedded_2.string_field = 'hello'
+        embedded_2.int_field = 1
+        embedded_2.dict_field = {'hello': 'world'}
+        embedded_2.list_field = ['1', 2, {'hello': 'world'}]
+
+        doc.embedded_field.list_field = ['1', 2, embedded_2]
+        self.assertEqual(doc._get_changed_fields(),
+            ['db_embedded_field.db_list_field'])
+        self.assertEqual(doc.embedded_field._delta(), ({
+            'db_list_field': ['1', 2, {
+                '_cls': 'Embedded',
+                'db_string_field': 'hello',
+                'db_dict_field': {'hello': 'world'},
+                'db_int_field': 1,
+                'db_list_field': ['1', 2, {'hello': 'world'}],
+            }]
+        }, {}))
+
+        self.assertEqual(doc._delta(), ({
+            'db_embedded_field.db_list_field': ['1', 2, {
+                '_cls': 'Embedded',
+                'db_string_field': 'hello',
+                'db_dict_field': {'hello': 'world'},
+                'db_int_field': 1,
+                'db_list_field': ['1', 2, {'hello': 'world'}],
+            }]
+        }, {}))
+        doc.save()
+        doc = doc.reload(10)
+
+        self.assertEqual(doc.embedded_field.list_field[0], '1')
+        self.assertEqual(doc.embedded_field.list_field[1], 2)
+        for k in doc.embedded_field.list_field[2]._fields:
+            self.assertEqual(doc.embedded_field.list_field[2][k],
+                             embedded_2[k])
+
+        doc.embedded_field.list_field[2].string_field = 'world'
+        self.assertEqual(doc._get_changed_fields(),
+            ['db_embedded_field.db_list_field.2.db_string_field'])
+        self.assertEqual(doc.embedded_field._delta(),
+            ({'db_list_field.2.db_string_field': 'world'}, {}))
+        self.assertEqual(doc._delta(),
+            ({'db_embedded_field.db_list_field.2.db_string_field': 'world'},
+             {}))
+        doc.save()
+        doc = doc.reload(10)
+        self.assertEqual(doc.embedded_field.list_field[2].string_field,
+                        'world')
+
+        # Test multiple assignments
+        doc.embedded_field.list_field[2].string_field = 'hello world'
+        doc.embedded_field.list_field[2] = doc.embedded_field.list_field[2]
+        self.assertEqual(doc._get_changed_fields(),
+            ['db_embedded_field.db_list_field.2'])
+        self.assertEqual(doc.embedded_field._delta(), ({'db_list_field.2': {
+            '_cls': 'Embedded',
+            'db_string_field': 'hello world',
+            'db_int_field': 1,
+            'db_list_field': ['1', 2, {'hello': 'world'}],
+            'db_dict_field': {'hello': 'world'}}}, {}))
+        self.assertEqual(doc._delta(), ({
+            'db_embedded_field.db_list_field.2': {
+                '_cls': 'Embedded',
+                'db_string_field': 'hello world',
+                'db_int_field': 1,
+                'db_list_field': ['1', 2, {'hello': 'world'}],
+                'db_dict_field': {'hello': 'world'}}
+            }, {}))
+        doc.save()
+        doc = doc.reload(10)
+        self.assertEqual(doc.embedded_field.list_field[2].string_field,
+                        'hello world')
+
+        # Test list native methods
+        doc.embedded_field.list_field[2].list_field.pop(0)
+        self.assertEqual(doc._delta(),
+            ({'db_embedded_field.db_list_field.2.db_list_field':
+                [2, {'hello': 'world'}]}, {}))
+        doc.save()
+        doc = doc.reload(10)
+
+        doc.embedded_field.list_field[2].list_field.append(1)
+        self.assertEqual(doc._delta(),
+            ({'db_embedded_field.db_list_field.2.db_list_field':
+                [2, {'hello': 'world'}, 1]}, {}))
+        doc.save()
+        doc = doc.reload(10)
+        self.assertEqual(doc.embedded_field.list_field[2].list_field,
+            [2, {'hello': 'world'}, 1])
+
+        doc.embedded_field.list_field[2].list_field.sort(key=str)
+        doc.save()
+        doc = doc.reload(10)
+        self.assertEqual(doc.embedded_field.list_field[2].list_field,
+            [1, 2, {'hello': 'world'}])
+
+        del doc.embedded_field.list_field[2].list_field[2]['hello']
+        self.assertEqual(doc._delta(),
+            ({}, {'db_embedded_field.db_list_field.2.db_list_field.2.hello': 1}))
+        doc.save()
+        doc = doc.reload(10)
+
+        del doc.embedded_field.list_field[2].list_field
+        self.assertEqual(doc._delta(), ({},
+            {'db_embedded_field.db_list_field.2.db_list_field': 1}))
+
+    def test_delta_for_dynamic_documents(self):
+        class Person(DynamicDocument):
+            name = StringField()
+            meta = {'allow_inheritance': True}
+
+        Person.drop_collection()
+
+        p = Person(name="James", age=34)
+        self.assertEqual(p._delta(), (
+            SON([('_cls', 'Person'), ('name', 'James'), ('age', 34)]), {}))
+
+        p.doc = 123
+        del p.doc
+        self.assertEqual(p._delta(), (
+            SON([('_cls', 'Person'), ('name', 'James'), ('age', 34)]), {}))
+
+        p = Person()
+        p.name = "Dean"
+        p.age = 22
+        p.save()
+
+        p.age = 24
+        self.assertEqual(p.age, 24)
+        self.assertEqual(p._get_changed_fields(), ['age'])
+        self.assertEqual(p._delta(), ({'age': 24}, {}))
+
+        p = Person.objects(age=22).get()
+        p.age = 24
+        self.assertEqual(p.age, 24)
+        self.assertEqual(p._get_changed_fields(), ['age'])
+        self.assertEqual(p._delta(), ({'age': 24}, {}))
+
+        p.save()
+        self.assertEqual(1, Person.objects(age=24).count())
+
+    def test_dynamic_delta(self):
+
+        class Doc(DynamicDocument):
+            pass
+
+        Doc.drop_collection()
+        doc = Doc()
+        doc.save()
+
+        doc = Doc.objects.first()
+        self.assertEqual(doc._get_changed_fields(), [])
+        self.assertEqual(doc._delta(), ({}, {}))
+
+        doc.string_field = 'hello'
+        self.assertEqual(doc._get_changed_fields(), ['string_field'])
+        self.assertEqual(doc._delta(), ({'string_field': 'hello'}, {}))
+
+        doc._changed_fields = []
+        doc.int_field = 1
+        self.assertEqual(doc._get_changed_fields(), ['int_field'])
+        self.assertEqual(doc._delta(), ({'int_field': 1}, {}))
+
+        doc._changed_fields = []
+        dict_value = {'hello': 'world', 'ping': 'pong'}
+        doc.dict_field = dict_value
+        self.assertEqual(doc._get_changed_fields(), ['dict_field'])
+        self.assertEqual(doc._delta(), ({'dict_field': dict_value}, {}))
+
+        doc._changed_fields = []
+        list_value = ['1', 2, {'hello': 'world'}]
+        doc.list_field = list_value
+        self.assertEqual(doc._get_changed_fields(), ['list_field'])
+        self.assertEqual(doc._delta(), ({'list_field': list_value}, {}))
+
+        # Test unsetting
+        doc._changed_fields = []
+        doc.dict_field = {}
+        self.assertEqual(doc._get_changed_fields(), ['dict_field'])
+        self.assertEqual(doc._delta(), ({}, {'dict_field': 1}))
+
+        doc._changed_fields = []
+        doc.list_field = []
+        self.assertEqual(doc._get_changed_fields(), ['list_field'])
+        self.assertEqual(doc._delta(), ({}, {'list_field': 1}))
+
+    def test_delta_with_dbref_true(self):
+        person, organization, employee = self.circular_reference_deltas_2(Document, Document, True)
+        employee.name = 'test'
+
+        self.assertEqual(organization._get_changed_fields(), [])
+
+        updates, removals = organization._delta()
+        self.assertEqual({}, removals)
+        self.assertEqual({}, updates)
+
+        organization.employees.append(person)
+        updates, removals = organization._delta()
+        self.assertEqual({}, removals)
+        self.assertTrue('employees' in updates)
+
+    def test_delta_with_dbref_false(self):
+        person, organization, employee = self.circular_reference_deltas_2(Document, Document, False)
+        employee.name = 'test'
+
+        self.assertEqual(organization._get_changed_fields(), [])
+
+        updates, removals = organization._delta()
+        self.assertEqual({}, removals)
+        self.assertEqual({}, updates)
+
+        organization.employees.append(person)
+        updates, removals = organization._delta()
+        self.assertEqual({}, removals)
+        self.assertTrue('employees' in updates)
+
+    def test_nested_nested_fields_mark_as_changed(self):
+        class EmbeddedDoc(EmbeddedDocument):
+            name = StringField()
+
+        class MyDoc(Document):
+            subs = MapField(MapField(EmbeddedDocumentField(EmbeddedDoc)))
+            name = StringField()
+
+        MyDoc.drop_collection()
+
+        mydoc = MyDoc(name='testcase1', subs={'a': {'b': EmbeddedDoc(name='foo')}}).save()
+
+        mydoc = MyDoc.objects.first()
+        subdoc = mydoc.subs['a']['b']
+        subdoc.name = 'bar'
+
+        self.assertEqual(["name"], subdoc._get_changed_fields())
+        self.assertEqual(["subs.a.b.name"], mydoc._get_changed_fields())
+
+        mydoc._clear_changed_fields()
+        self.assertEqual([], mydoc._get_changed_fields())
+
+    def test_lower_level_mark_as_changed(self):
+        class EmbeddedDoc(EmbeddedDocument):
+            name = StringField()
+
+        class MyDoc(Document):
+            subs = MapField(EmbeddedDocumentField(EmbeddedDoc))
+
+        MyDoc.drop_collection()
+
+        MyDoc().save()
+
+        mydoc = MyDoc.objects.first()
+        mydoc.subs['a'] = EmbeddedDoc()
+        self.assertEqual(["subs.a"], mydoc._get_changed_fields())
+
+        subdoc = mydoc.subs['a']
+        subdoc.name = 'bar'
+
+        self.assertEqual(["name"], subdoc._get_changed_fields())
+        self.assertEqual(["subs.a"], mydoc._get_changed_fields())
+        mydoc.save()
+
+        mydoc._clear_changed_fields()
+        self.assertEqual([], mydoc._get_changed_fields())
+
+    def test_upper_level_mark_as_changed(self):
+        class EmbeddedDoc(EmbeddedDocument):
+            name = StringField()
+
+        class MyDoc(Document):
+            subs = MapField(EmbeddedDocumentField(EmbeddedDoc))
+
+        MyDoc.drop_collection()
+
+        MyDoc(subs={'a': EmbeddedDoc(name='foo')}).save()
+
+        mydoc = MyDoc.objects.first()
+        subdoc = mydoc.subs['a']
+        subdoc.name = 'bar'
+
+        self.assertEqual(["name"], subdoc._get_changed_fields())
+        self.assertEqual(["subs.a.name"], mydoc._get_changed_fields())
+
+        mydoc.subs['a'] = EmbeddedDoc()
+        self.assertEqual(["subs.a"], mydoc._get_changed_fields())
+        mydoc.save()
+
+        mydoc._clear_changed_fields()
+        self.assertEqual([], mydoc._get_changed_fields())
+
+    def test_referenced_object_changed_attributes(self):
+        """Ensures that when you save a new reference to a field, the referenced object isn't altered"""
+
+        class Organization(Document):
+            name = StringField()
+
+        class User(Document):
+            name = StringField()
+            org = ReferenceField('Organization', required=True)
+
+        Organization.drop_collection()
+        User.drop_collection()
+
+        org1 = Organization(name='Org 1')
+        org1.save()
+
+        org2 = Organization(name='Org 2')
+        org2.save()
+
+        user = User(name='Fred', org=org1)
+        user.save()
+
+        org1.reload()
+        org2.reload()
+        user.reload()
+        self.assertEqual(org1.name, 'Org 1')
+        self.assertEqual(org2.name, 'Org 2')
+        self.assertEqual(user.name, 'Fred')
+
+        user.name = 'Harold'
+        user.org = org2
+
+        org2.name = 'New Org 2'
+        self.assertEqual(org2.name, 'New Org 2')
+
+        user.save()
+        org2.save()
+
+        self.assertEqual(org2.name, 'New Org 2')
+        org2.reload()
+        self.assertEqual(org2.name, 'New Org 2')
+
+    def test_delta_for_nested_map_fields(self):
+        class UInfoDocument(Document):
+            phone = StringField()
+
+        class EmbeddedRole(EmbeddedDocument):
+            type = StringField()
+
+        class EmbeddedUser(EmbeddedDocument):
+            name = StringField()
+            roles = MapField(field=EmbeddedDocumentField(EmbeddedRole))
+            rolist = ListField(field=EmbeddedDocumentField(EmbeddedRole))
+            info = ReferenceField(UInfoDocument)
+
+        class Doc(Document):
+            users = MapField(field=EmbeddedDocumentField(EmbeddedUser))
+            num = IntField(default=-1)
+
+        Doc.drop_collection()
+
+        doc = Doc(num=1)
+        doc.users["007"] = EmbeddedUser(name="Agent007")
+        doc.save()
+
+        uinfo = UInfoDocument(phone="79089269066")
+        uinfo.save()
+
+        d = Doc.objects(num=1).first()
+        d.users["007"]["roles"]["666"] = EmbeddedRole(type="superadmin")
+        d.users["007"]["rolist"].append(EmbeddedRole(type="oops"))
+        d.users["007"]["info"] = uinfo
+        delta = d._delta()
+        self.assertEqual(True, "users.007.roles.666" in delta[0])
+        self.assertEqual(True, "users.007.rolist" in delta[0])
+        self.assertEqual(True, "users.007.info" in delta[0])
+        self.assertEqual('superadmin', delta[0]["users.007.roles.666"]["type"])
+        self.assertEqual('oops', delta[0]["users.007.rolist"][0]["type"])
+        self.assertEqual(uinfo.id, delta[0]["users.007.info"])
+
+if __name__ == '__main__':
+    unittest.main()

tests/document/dynamic.py

@@ -0,0 +1,373 @@
+import unittest
+
+from mongoengine import *
+from mongoengine.connection import get_db
+
+__all__ = ("DynamicTest", )
+
+
+class DynamicTest(unittest.TestCase):
+
+    def setUp(self):
+        connect(db='mongoenginetest')
+        self.db = get_db()
+
+        class Person(DynamicDocument):
+            name = StringField()
+            meta = {'allow_inheritance': True}
+
+        Person.drop_collection()
+
+        self.Person = Person
+
+    def test_simple_dynamic_document(self):
+        """Ensures simple dynamic documents are saved correctly"""
+
+        p = self.Person()
+        p.name = "James"
+        p.age = 34
+
+        self.assertEqual(p.to_mongo(), {"_cls": "Person", "name": "James",
+                                        "age": 34})
+        self.assertEqual(p.to_mongo().keys(), ["_cls", "name", "age"])
+        p.save()
+        self.assertEqual(p.to_mongo().keys(), ["_id", "_cls", "name", "age"])
+
+        self.assertEqual(self.Person.objects.first().age, 34)
+
+        # Confirm no changes to self.Person
+        self.assertFalse(hasattr(self.Person, 'age'))
+
+    def test_change_scope_of_variable(self):
+        """Test changing the scope of a dynamic field has no adverse effects"""
+        p = self.Person()
+        p.name = "Dean"
+        p.misc = 22
+        p.save()
+
+        p = self.Person.objects.get()
+        p.misc = {'hello': 'world'}
+        p.save()
+
+        p = self.Person.objects.get()
+        self.assertEqual(p.misc, {'hello': 'world'})
+
+    def test_delete_dynamic_field(self):
+        """Test deleting a dynamic field works"""
+        self.Person.drop_collection()
+        p = self.Person()
+        p.name = "Dean"
+        p.misc = 22
+        p.save()
+
+        p = self.Person.objects.get()
+        p.misc = {'hello': 'world'}
+        p.save()
+
+        p = self.Person.objects.get()
+        self.assertEqual(p.misc, {'hello': 'world'})
+        collection = self.db[self.Person._get_collection_name()]
+        obj = collection.find_one()
+        self.assertEqual(sorted(obj.keys()), ['_cls', '_id', 'misc', 'name'])
+
+        del p.misc
+        p.save()
+
+        p = self.Person.objects.get()
+        self.assertFalse(hasattr(p, 'misc'))
+
+        obj = collection.find_one()
+        self.assertEqual(sorted(obj.keys()), ['_cls', '_id', 'name'])
+
+    def test_reload_after_unsetting(self):
+        p = self.Person()
+        p.misc = 22
+        p.save()
+        p.update(unset__misc=1)
+        p.reload()
+
+    def test_reload_dynamic_field(self):
+        self.Person.objects.delete()
+        p = self.Person.objects.create()
+        p.update(age=1)
+
+        self.assertEqual(len(p._data), 3)
+        self.assertEqual(sorted(p._data.keys()), ['_cls', 'id', 'name'])
+
+        p.reload()
+        self.assertEqual(len(p._data), 4)
+        self.assertEqual(sorted(p._data.keys()), ['_cls', 'age', 'id', 'name'])
+
+    def test_dynamic_document_queries(self):
+        """Ensure we can query dynamic fields"""
+        p = self.Person()
+        p.name = "Dean"
+        p.age = 22
+        p.save()
+
+        self.assertEqual(1, self.Person.objects(age=22).count())
+        p = self.Person.objects(age=22)
+        p = p.get()
+        self.assertEqual(22, p.age)
+
+    def test_complex_dynamic_document_queries(self):
+        class Person(DynamicDocument):
+            name = StringField()
+
+        Person.drop_collection()
+
+        p = Person(name="test")
+        p.age = "ten"
+        p.save()
+
+        p1 = Person(name="test1")
+        p1.age = "less then ten and a half"
+        p1.save()
+
+        p2 = Person(name="test2")
+        p2.age = 10
+        p2.save()
+
+        self.assertEqual(Person.objects(age__icontains='ten').count(), 2)
+        self.assertEqual(Person.objects(age__gte=10).count(), 1)
+
+    def test_complex_data_lookups(self):
+        """Ensure you can query dynamic document dynamic fields"""
+        p = self.Person()
+        p.misc = {'hello': 'world'}
+        p.save()
+
+        self.assertEqual(1, self.Person.objects(misc__hello='world').count())
+
+    def test_three_level_complex_data_lookups(self):
+        """Ensure you can query three level document dynamic fields"""
+        p = self.Person.objects.create(
+            misc={'hello': {'hello2': 'world'}}
+        )
+        self.assertEqual(1, self.Person.objects(misc__hello__hello2='world').count())
+
+    def test_complex_embedded_document_validation(self):
+        """Ensure embedded dynamic documents may be validated"""
+        class Embedded(DynamicEmbeddedDocument):
+            content = URLField()
+
+        class Doc(DynamicDocument):
+            pass
+
+        Doc.drop_collection()
+        doc = Doc()
+
+        embedded_doc_1 = Embedded(content='http://mongoengine.org')
+        embedded_doc_1.validate()
+
+        embedded_doc_2 = Embedded(content='this is not a url')
+        self.assertRaises(ValidationError, embedded_doc_2.validate)
+
+        doc.embedded_field_1 = embedded_doc_1
+        doc.embedded_field_2 = embedded_doc_2
+        self.assertRaises(ValidationError, doc.validate)
+
+    def test_inheritance(self):
+        """Ensure that dynamic document plays nice with inheritance"""
+        class Employee(self.Person):
+            salary = IntField()
+
+        Employee.drop_collection()
+
+        self.assertTrue('name' in Employee._fields)
+        self.assertTrue('salary' in Employee._fields)
+        self.assertEqual(Employee._get_collection_name(),
+                         self.Person._get_collection_name())
+
+        joe_bloggs = Employee()
+        joe_bloggs.name = "Joe Bloggs"
+        joe_bloggs.salary = 10
+        joe_bloggs.age = 20
+        joe_bloggs.save()
+
+        self.assertEqual(1, self.Person.objects(age=20).count())
+        self.assertEqual(1, Employee.objects(age=20).count())
+
+        joe_bloggs = self.Person.objects.first()
+        self.assertTrue(isinstance(joe_bloggs, Employee))
+
+    def test_embedded_dynamic_document(self):
+        """Test dynamic embedded documents"""
+        class Embedded(DynamicEmbeddedDocument):
+            pass
+
+        class Doc(DynamicDocument):
+            pass
+
+        Doc.drop_collection()
+        doc = Doc()
+
+        embedded_1 = Embedded()
+        embedded_1.string_field = 'hello'
+        embedded_1.int_field = 1
+        embedded_1.dict_field = {'hello': 'world'}
+        embedded_1.list_field = ['1', 2, {'hello': 'world'}]
+        doc.embedded_field = embedded_1
+
+        self.assertEqual(doc.to_mongo(), {
+            "embedded_field": {
+                "_cls": "Embedded",
+                "string_field": "hello",
+                "int_field": 1,
+                "dict_field": {"hello": "world"},
+                "list_field": ['1', 2, {'hello': 'world'}]
+            }
+        })
+        doc.save()
+
+        doc = Doc.objects.first()
+        self.assertEqual(doc.embedded_field.__class__, Embedded)
+        self.assertEqual(doc.embedded_field.string_field, "hello")
+        self.assertEqual(doc.embedded_field.int_field, 1)
+        self.assertEqual(doc.embedded_field.dict_field, {'hello': 'world'})
+        self.assertEqual(doc.embedded_field.list_field,
+                            ['1', 2, {'hello': 'world'}])
+
+    def test_complex_embedded_documents(self):
+        """Test complex dynamic embedded documents setups"""
+        class Embedded(DynamicEmbeddedDocument):
+            pass
+
+        class Doc(DynamicDocument):
+            pass
+
+        Doc.drop_collection()
+        doc = Doc()
+
+        embedded_1 = Embedded()
+        embedded_1.string_field = 'hello'
+        embedded_1.int_field = 1
+        embedded_1.dict_field = {'hello': 'world'}
+
+        embedded_2 = Embedded()
+        embedded_2.string_field = 'hello'
+        embedded_2.int_field = 1
+        embedded_2.dict_field = {'hello': 'world'}
+        embedded_2.list_field = ['1', 2, {'hello': 'world'}]
+
+        embedded_1.list_field = ['1', 2, embedded_2]
+        doc.embedded_field = embedded_1
+
+        self.assertEqual(doc.to_mongo(), {
+            "embedded_field": {
+                "_cls": "Embedded",
+                "string_field": "hello",
+                "int_field": 1,
+                "dict_field": {"hello": "world"},
+                "list_field": ['1', 2,
+                    {"_cls": "Embedded",
+                    "string_field": "hello",
+                    "int_field": 1,
+                    "dict_field": {"hello": "world"},
+                    "list_field": ['1', 2, {'hello': 'world'}]}
+                ]
+            }
+        })
+        doc.save()
+        doc = Doc.objects.first()
+        self.assertEqual(doc.embedded_field.__class__, Embedded)
+        self.assertEqual(doc.embedded_field.string_field, "hello")
+        self.assertEqual(doc.embedded_field.int_field, 1)
+        self.assertEqual(doc.embedded_field.dict_field, {'hello': 'world'})
+        self.assertEqual(doc.embedded_field.list_field[0], '1')
+        self.assertEqual(doc.embedded_field.list_field[1], 2)
+
+        embedded_field = doc.embedded_field.list_field[2]
+
+        self.assertEqual(embedded_field.__class__, Embedded)
+        self.assertEqual(embedded_field.string_field, "hello")
+        self.assertEqual(embedded_field.int_field, 1)
+        self.assertEqual(embedded_field.dict_field, {'hello': 'world'})
+        self.assertEqual(embedded_field.list_field, ['1', 2,
+                                                        {'hello': 'world'}])
+
+    def test_dynamic_and_embedded(self):
+        """Ensure embedded documents play nicely"""
+
+        class Address(EmbeddedDocument):
+            city = StringField()
+
+        class Person(DynamicDocument):
+            name = StringField()
+
+        Person.drop_collection()
+
+        Person(name="Ross", address=Address(city="London")).save()
+
+        person = Person.objects.first()
+        person.address.city = "Lundenne"
+        person.save()
+
+        self.assertEqual(Person.objects.first().address.city, "Lundenne")
+
+        person = Person.objects.first()
+        person.address = Address(city="Londinium")
+        person.save()
+
+        self.assertEqual(Person.objects.first().address.city, "Londinium")
+
+        person = Person.objects.first()
+        person.age = 35
+        person.save()
+        self.assertEqual(Person.objects.first().age, 35)
+
+    def test_dynamic_embedded_works_with_only(self):
+        """Ensure custom fieldnames on a dynamic embedded document are found by qs.only()"""
+
+        class Address(DynamicEmbeddedDocument):
+            city = StringField()
+
+        class Person(DynamicDocument):
+            address = EmbeddedDocumentField(Address)
+
+        Person.drop_collection()
+
+        Person(name="Eric", address=Address(city="San Francisco", street_number="1337")).save()
+
+        self.assertEqual(Person.objects.first().address.street_number, '1337')
+        self.assertEqual(Person.objects.only('address__street_number').first().address.street_number, '1337')
+
+    def test_dynamic_and_embedded_dict_access(self):
+        """Ensure embedded dynamic documents work with dict[] style access"""
+
+        class Address(EmbeddedDocument):
+            city = StringField()
+
+        class Person(DynamicDocument):
+            name = StringField()
+
+        Person.drop_collection()
+
+        Person(name="Ross", address=Address(city="London")).save()
+
+        person = Person.objects.first()
+        person.attrval = "This works"
+
+        person["phone"] = "555-1212"  # but this should too
+
+        # Same thing two levels deep
+        person["address"]["city"] = "Lundenne"
+        person.save()
+
+        self.assertEqual(Person.objects.first().address.city, "Lundenne")
+
+        self.assertEqual(Person.objects.first().phone, "555-1212")
+
+        person = Person.objects.first()
+        person.address = Address(city="Londinium")
+        person.save()
+
+        self.assertEqual(Person.objects.first().address.city, "Londinium")
+
+        person = Person.objects.first()
+        person["age"] = 35
+        person.save()
+        self.assertEqual(Person.objects.first().age, 35)
+
+if __name__ == '__main__':
+    unittest.main()

tests/document/inheritance.py

@@ -0,0 +1,512 @@
+# -*- coding: utf-8 -*-
+import unittest
+import warnings
+
+from datetime import datetime
+
+from tests.fixtures import Base
+
+from mongoengine import Document, EmbeddedDocument, connect
+from mongoengine.connection import get_db
+from mongoengine.fields import (BooleanField, GenericReferenceField,
+                                IntField, StringField)
+
+__all__ = ('InheritanceTest', )
+
+
+class InheritanceTest(unittest.TestCase):
+
+    def setUp(self):
+        connect(db='mongoenginetest')
+        self.db = get_db()
+
+    def tearDown(self):
+        for collection in self.db.collection_names():
+            if 'system.' in collection:
+                continue
+            self.db.drop_collection(collection)
+
+    def test_superclasses(self):
+        """Ensure that the correct list of superclasses is assembled.
+        """
+        class Animal(Document):
+            meta = {'allow_inheritance': True}
+        class Fish(Animal): pass
+        class Guppy(Fish): pass
+        class Mammal(Animal): pass
+        class Dog(Mammal): pass
+        class Human(Mammal): pass
+
+        self.assertEqual(Animal._superclasses, ())
+        self.assertEqual(Fish._superclasses, ('Animal',))
+        self.assertEqual(Guppy._superclasses, ('Animal', 'Animal.Fish'))
+        self.assertEqual(Mammal._superclasses, ('Animal',))
+        self.assertEqual(Dog._superclasses, ('Animal', 'Animal.Mammal'))
+        self.assertEqual(Human._superclasses, ('Animal', 'Animal.Mammal'))
+
+    def test_external_superclasses(self):
+        """Ensure that the correct list of super classes is assembled when
+        importing part of the model.
+        """
+        class Animal(Base): pass
+        class Fish(Animal): pass
+        class Guppy(Fish): pass
+        class Mammal(Animal): pass
+        class Dog(Mammal): pass
+        class Human(Mammal): pass
+
+        self.assertEqual(Animal._superclasses, ('Base', ))
+        self.assertEqual(Fish._superclasses, ('Base', 'Base.Animal',))
+        self.assertEqual(Guppy._superclasses, ('Base', 'Base.Animal',
+                                               'Base.Animal.Fish'))
+        self.assertEqual(Mammal._superclasses, ('Base', 'Base.Animal',))
+        self.assertEqual(Dog._superclasses, ('Base', 'Base.Animal',
+                                             'Base.Animal.Mammal'))
+        self.assertEqual(Human._superclasses, ('Base', 'Base.Animal',
+                                               'Base.Animal.Mammal'))
+
+    def test_subclasses(self):
+        """Ensure that the correct list of _subclasses (subclasses) is
+        assembled.
+        """
+        class Animal(Document):
+            meta = {'allow_inheritance': True}
+        class Fish(Animal): pass
+        class Guppy(Fish): pass
+        class Mammal(Animal): pass
+        class Dog(Mammal): pass
+        class Human(Mammal): pass
+
+        self.assertEqual(Animal._subclasses, ('Animal',
+                                         'Animal.Fish',
+                                         'Animal.Fish.Guppy',
+                                         'Animal.Mammal',
+                                         'Animal.Mammal.Dog',
+                                         'Animal.Mammal.Human'))
+        self.assertEqual(Fish._subclasses, ('Animal.Fish',
+                                       'Animal.Fish.Guppy',))
+        self.assertEqual(Guppy._subclasses, ('Animal.Fish.Guppy',))
+        self.assertEqual(Mammal._subclasses, ('Animal.Mammal',
+                                         'Animal.Mammal.Dog',
+                                         'Animal.Mammal.Human'))
+        self.assertEqual(Human._subclasses, ('Animal.Mammal.Human',))
+
+    def test_external_subclasses(self):
+        """Ensure that the correct list of _subclasses (subclasses) is
+        assembled when importing part of the model.
+        """
+        class Animal(Base): pass
+        class Fish(Animal): pass
+        class Guppy(Fish): pass
+        class Mammal(Animal): pass
+        class Dog(Mammal): pass
+        class Human(Mammal): pass
+
+        self.assertEqual(Animal._subclasses, ('Base.Animal',
+                                              'Base.Animal.Fish',
+                                              'Base.Animal.Fish.Guppy',
+                                              'Base.Animal.Mammal',
+                                              'Base.Animal.Mammal.Dog',
+                                              'Base.Animal.Mammal.Human'))
+        self.assertEqual(Fish._subclasses, ('Base.Animal.Fish',
+                                            'Base.Animal.Fish.Guppy',))
+        self.assertEqual(Guppy._subclasses, ('Base.Animal.Fish.Guppy',))
+        self.assertEqual(Mammal._subclasses, ('Base.Animal.Mammal',
+                                              'Base.Animal.Mammal.Dog',
+                                              'Base.Animal.Mammal.Human'))
+        self.assertEqual(Human._subclasses, ('Base.Animal.Mammal.Human',))
+
+    def test_dynamic_declarations(self):
+        """Test that declaring an extra class updates meta data"""
+
+        class Animal(Document):
+            meta = {'allow_inheritance': True}
+
+        self.assertEqual(Animal._superclasses, ())
+        self.assertEqual(Animal._subclasses, ('Animal',))
+
+        # Test dynamically adding a class changes the meta data
+        class Fish(Animal):
+            pass
+
+        self.assertEqual(Animal._superclasses, ())
+        self.assertEqual(Animal._subclasses, ('Animal', 'Animal.Fish'))
+
+        self.assertEqual(Fish._superclasses, ('Animal', ))
+        self.assertEqual(Fish._subclasses, ('Animal.Fish',))
+
+        # Test dynamically adding an inherited class changes the meta data
+        class Pike(Fish):
+            pass
+
+        self.assertEqual(Animal._superclasses, ())
+        self.assertEqual(Animal._subclasses, ('Animal', 'Animal.Fish',
+                                              'Animal.Fish.Pike'))
+
+        self.assertEqual(Fish._superclasses, ('Animal', ))
+        self.assertEqual(Fish._subclasses, ('Animal.Fish', 'Animal.Fish.Pike'))
+
+        self.assertEqual(Pike._superclasses, ('Animal', 'Animal.Fish'))
+        self.assertEqual(Pike._subclasses, ('Animal.Fish.Pike',))
+
+    def test_inheritance_meta_data(self):
+        """Ensure that document may inherit fields from a superclass document.
+        """
+        class Person(Document):
+            name = StringField()
+            age = IntField()
+
+            meta = {'allow_inheritance': True}
+
+        class Employee(Person):
+            salary = IntField()
+
+        self.assertEqual(['_cls', 'age', 'id', 'name', 'salary'],
+                         sorted(Employee._fields.keys()))
+        self.assertEqual(Employee._get_collection_name(),
+                         Person._get_collection_name())
+
+    def test_inheritance_to_mongo_keys(self):
+        """Ensure that document may inherit fields from a superclass document.
+        """
+        class Person(Document):
+            name = StringField()
+            age = IntField()
+
+            meta = {'allow_inheritance': True}
+
+        class Employee(Person):
+            salary = IntField()
+
+        self.assertEqual(['_cls', 'age', 'id', 'name', 'salary'],
+                         sorted(Employee._fields.keys()))
+        self.assertEqual(Person(name="Bob", age=35).to_mongo().keys(),
+                         ['_cls', 'name', 'age'])
+        self.assertEqual(Employee(name="Bob", age=35, salary=0).to_mongo().keys(),
+                         ['_cls', 'name', 'age', 'salary'])
+        self.assertEqual(Employee._get_collection_name(),
+                         Person._get_collection_name())
+
+    def test_indexes_and_multiple_inheritance(self):
+        """ Ensure that all of the indexes are created for a document with
+        multiple inheritance.
+        """
+
+        class A(Document):
+            a = StringField()
+
+            meta = {
+                'allow_inheritance': True,
+                'indexes': ['a']
+            }
+
+        class B(Document):
+            b = StringField()
+
+            meta = {
+                'allow_inheritance': True,
+                'indexes': ['b']
+            }
+
+        class C(A, B):
+            pass
+
+        A.drop_collection()
+        B.drop_collection()
+        C.drop_collection()
+
+        C.ensure_indexes()
+
+        self.assertEqual(
+            sorted([idx['key'] for idx in C._get_collection().index_information().values()]),
+            sorted([[(u'_cls', 1), (u'b', 1)], [(u'_id', 1)], [(u'_cls', 1), (u'a', 1)]])
+        )
+
+    def test_polymorphic_queries(self):
+        """Ensure that the correct subclasses are returned from a query
+        """
+
+        class Animal(Document):
+            meta = {'allow_inheritance': True}
+        class Fish(Animal): pass
+        class Mammal(Animal): pass
+        class Dog(Mammal): pass
+        class Human(Mammal): pass
+
+        Animal.drop_collection()
+
+        Animal().save()
+        Fish().save()
+        Mammal().save()
+        Dog().save()
+        Human().save()
+
+        classes = [obj.__class__ for obj in Animal.objects]
+        self.assertEqual(classes, [Animal, Fish, Mammal, Dog, Human])
+
+        classes = [obj.__class__ for obj in Mammal.objects]
+        self.assertEqual(classes, [Mammal, Dog, Human])
+
+        classes = [obj.__class__ for obj in Human.objects]
+        self.assertEqual(classes, [Human])
+
+    def test_allow_inheritance(self):
+        """Ensure that inheritance is disabled by default on simple
+        classes and that _cls will not be used.
+        """
+        class Animal(Document):
+            name = StringField()
+
+        # can't inherit because Animal didn't explicitly allow inheritance
+        with self.assertRaises(ValueError):
+            class Dog(Animal):
+                pass
+
+        # Check that _cls etc aren't present on simple documents
+        dog = Animal(name='dog').save()
+        self.assertEqual(dog.to_mongo().keys(), ['_id', 'name'])
+
+        collection = self.db[Animal._get_collection_name()]
+        obj = collection.find_one()
+        self.assertFalse('_cls' in obj)
+
+    def test_cant_turn_off_inheritance_on_subclass(self):
+        """Ensure if inheritance is on in a subclass you cant turn it off.
+        """
+        class Animal(Document):
+            name = StringField()
+            meta = {'allow_inheritance': True}
+
+        with self.assertRaises(ValueError):
+            class Mammal(Animal):
+                meta = {'allow_inheritance': False}
+
+    def test_allow_inheritance_abstract_document(self):
+        """Ensure that abstract documents can set inheritance rules and that
+        _cls will not be used.
+        """
+        class FinalDocument(Document):
+            meta = {'abstract': True,
+                    'allow_inheritance': False}
+
+        class Animal(FinalDocument):
+            name = StringField()
+
+        with self.assertRaises(ValueError):
+            class Mammal(Animal):
+                pass
+
+        # Check that _cls isn't present in simple documents
+        doc = Animal(name='dog')
+        self.assertFalse('_cls' in doc.to_mongo())
+
+    def test_abstract_handle_ids_in_metaclass_properly(self):
+
+        class City(Document):
+            continent = StringField()
+            meta = {'abstract': True,
+                    'allow_inheritance': False}
+
+        class EuropeanCity(City):
+            name = StringField()
+
+        berlin = EuropeanCity(name='Berlin', continent='Europe')
+        self.assertEqual(len(berlin._db_field_map), len(berlin._fields_ordered))
+        self.assertEqual(len(berlin._reverse_db_field_map), len(berlin._fields_ordered))
+        self.assertEqual(len(berlin._fields_ordered), 3)
+        self.assertEqual(berlin._fields_ordered[0], 'id')
+
+    def test_auto_id_not_set_if_specific_in_parent_class(self):
+
+        class City(Document):
+            continent = StringField()
+            city_id = IntField(primary_key=True)
+            meta = {'abstract': True,
+                    'allow_inheritance': False}
+
+        class EuropeanCity(City):
+            name = StringField()
+
+        berlin = EuropeanCity(name='Berlin', continent='Europe')
+        self.assertEqual(len(berlin._db_field_map), len(berlin._fields_ordered))
+        self.assertEqual(len(berlin._reverse_db_field_map), len(berlin._fields_ordered))
+        self.assertEqual(len(berlin._fields_ordered), 3)
+        self.assertEqual(berlin._fields_ordered[0], 'city_id')
+
+    def test_auto_id_vs_non_pk_id_field(self):
+
+        class City(Document):
+            continent = StringField()
+            id = IntField()
+            meta = {'abstract': True,
+                    'allow_inheritance': False}
+
+        class EuropeanCity(City):
+            name = StringField()
+
+        berlin = EuropeanCity(name='Berlin', continent='Europe')
+        self.assertEqual(len(berlin._db_field_map), len(berlin._fields_ordered))
+        self.assertEqual(len(berlin._reverse_db_field_map), len(berlin._fields_ordered))
+        self.assertEqual(len(berlin._fields_ordered), 4)
+        self.assertEqual(berlin._fields_ordered[0], 'auto_id_0')
+        berlin.save()
+        self.assertEqual(berlin.pk, berlin.auto_id_0)
+
+    def test_abstract_document_creation_does_not_fail(self):
+        class City(Document):
+            continent = StringField()
+            meta = {'abstract': True,
+                    'allow_inheritance': False}
+
+        bkk = City(continent='asia')
+        self.assertEqual(None, bkk.pk)
+        # TODO: expected error? Shouldn't we create a new error type?
+        with self.assertRaises(KeyError):
+            setattr(bkk, 'pk', 1)
+
+    def test_allow_inheritance_embedded_document(self):
+        """Ensure embedded documents respect inheritance."""
+        class Comment(EmbeddedDocument):
+            content = StringField()
+
+        with self.assertRaises(ValueError):
+            class SpecialComment(Comment):
+                pass
+
+        doc = Comment(content='test')
+        self.assertFalse('_cls' in doc.to_mongo())
+
+        class Comment(EmbeddedDocument):
+            content = StringField()
+            meta = {'allow_inheritance': True}
+
+        doc = Comment(content='test')
+        self.assertTrue('_cls' in doc.to_mongo())
+
+    def test_document_inheritance(self):
+        """Ensure mutliple inheritance of abstract documents
+        """
+        class DateCreatedDocument(Document):
+            meta = {
+                'allow_inheritance': True,
+                'abstract': True,
+            }
+
+        class DateUpdatedDocument(Document):
+            meta = {
+                'allow_inheritance': True,
+                'abstract': True,
+            }
+
+        try:
+            class MyDocument(DateCreatedDocument, DateUpdatedDocument):
+                pass
+        except Exception:
+            self.assertTrue(False, "Couldn't create MyDocument class")
+
+    def test_abstract_documents(self):
+        """Ensure that a document superclass can be marked as abstract
+        thereby not using it as the name for the collection."""
+
+        defaults = {'index_background': True,
+                    'index_drop_dups': True,
+                    'index_opts': {'hello': 'world'},
+                    'allow_inheritance': True,
+                    'queryset_class': 'QuerySet',
+                    'db_alias': 'myDB',
+                    'shard_key': ('hello', 'world')}
+
+        meta_settings = {'abstract': True}
+        meta_settings.update(defaults)
+
+        class Animal(Document):
+            name = StringField()
+            meta = meta_settings
+
+        class Fish(Animal): pass
+        class Guppy(Fish): pass
+
+        class Mammal(Animal):
+            meta = {'abstract': True}
+        class Human(Mammal): pass
+
+        for k, v in defaults.iteritems():
+            for cls in [Animal, Fish, Guppy]:
+                self.assertEqual(cls._meta[k], v)
+
+        self.assertFalse('collection' in Animal._meta)
+        self.assertFalse('collection' in Mammal._meta)
+
+        self.assertEqual(Animal._get_collection_name(), None)
+        self.assertEqual(Mammal._get_collection_name(), None)
+
+        self.assertEqual(Fish._get_collection_name(), 'fish')
+        self.assertEqual(Guppy._get_collection_name(), 'fish')
+        self.assertEqual(Human._get_collection_name(), 'human')
+
+        # ensure that a subclass of a non-abstract class can't be abstract
+        with self.assertRaises(ValueError):
+            class EvilHuman(Human):
+                evil = BooleanField(default=True)
+                meta = {'abstract': True}
+
+    def test_abstract_embedded_documents(self):
+        # 789: EmbeddedDocument shouldn't inherit abstract
+        class A(EmbeddedDocument):
+            meta = {"abstract": True}
+
+        class B(A):
+            pass
+
+        self.assertFalse(B._meta["abstract"])
+
+    def test_inherited_collections(self):
+        """Ensure that subclassed documents don't override parents'
+        collections
+        """
+
+        class Drink(Document):
+            name = StringField()
+            meta = {'allow_inheritance': True}
+
+        class Drinker(Document):
+            drink = GenericReferenceField()
+
+        try:
+            warnings.simplefilter("error")
+
+            class AcloholicDrink(Drink):
+                meta = {'collection': 'booze'}
+
+        except SyntaxWarning:
+            warnings.simplefilter("ignore")
+
+            class AlcoholicDrink(Drink):
+                meta = {'collection': 'booze'}
+
+        else:
+            raise AssertionError("SyntaxWarning should be triggered")
+
+        warnings.resetwarnings()
+
+        Drink.drop_collection()
+        AlcoholicDrink.drop_collection()
+        Drinker.drop_collection()
+
+        red_bull = Drink(name='Red Bull')
+        red_bull.save()
+
+        programmer = Drinker(drink=red_bull)
+        programmer.save()
+
+        beer = AlcoholicDrink(name='Beer')
+        beer.save()
+        real_person = Drinker(drink=beer)
+        real_person.save()
+
+        self.assertEqual(Drinker.objects[0].drink.name, red_bull.name)
+        self.assertEqual(Drinker.objects[1].drink.name, beer.name)
+
+
+if __name__ == '__main__':
+    unittest.main()

tests/document/json_serialisation.py

@@ -0,0 +1,112 @@
+import unittest
+import uuid
+
+from nose.plugins.skip import SkipTest
+from datetime import datetime
+from bson import ObjectId
+
+import pymongo
+
+from mongoengine import *
+
+__all__ = ("TestJson",)
+
+
+class TestJson(unittest.TestCase):
+
+    def setUp(self):
+        connect(db='mongoenginetest')
+
+    def test_json_names(self):
+        """
+        Going to test reported issue:
+            https://github.com/MongoEngine/mongoengine/issues/654
+        where the reporter asks for the availability to perform
+        a to_json with the original class names and not the abreviated
+        mongodb document keys
+        """
+        class Embedded(EmbeddedDocument):
+            string = StringField(db_field='s')
+
+        class Doc(Document):
+            string = StringField(db_field='s')
+            embedded = EmbeddedDocumentField(Embedded, db_field='e')
+
+        doc = Doc( string="Hello", embedded=Embedded(string="Inner Hello"))
+        doc_json = doc.to_json(sort_keys=True, use_db_field=False,separators=(',', ':'))
+
+        expected_json = """{"embedded":{"string":"Inner Hello"},"string":"Hello"}"""
+
+        self.assertEqual( doc_json, expected_json)
+
+    def test_json_simple(self):
+
+        class Embedded(EmbeddedDocument):
+            string = StringField()
+
+        class Doc(Document):
+            string = StringField()
+            embedded_field = EmbeddedDocumentField(Embedded)
+
+            def __eq__(self, other):
+                return (self.string == other.string and
+                        self.embedded_field == other.embedded_field)
+
+        doc = Doc(string="Hi", embedded_field=Embedded(string="Hi"))
+
+        doc_json = doc.to_json(sort_keys=True, separators=(',', ':'))
+        expected_json = """{"embedded_field":{"string":"Hi"},"string":"Hi"}"""
+        self.assertEqual(doc_json, expected_json)
+
+        self.assertEqual(doc, Doc.from_json(doc.to_json()))
+
+    def test_json_complex(self):
+
+        if pymongo.version_tuple[0] <= 2 and pymongo.version_tuple[1] <= 3:
+            raise SkipTest("Need pymongo 2.4 as has a fix for DBRefs")
+
+        class EmbeddedDoc(EmbeddedDocument):
+            pass
+
+        class Simple(Document):
+            pass
+
+        class Doc(Document):
+            string_field = StringField(default='1')
+            int_field = IntField(default=1)
+            float_field = FloatField(default=1.1)
+            boolean_field = BooleanField(default=True)
+            datetime_field = DateTimeField(default=datetime.now)
+            embedded_document_field = EmbeddedDocumentField(EmbeddedDoc,
+                                        default=lambda: EmbeddedDoc())
+            list_field = ListField(default=lambda: [1, 2, 3])
+            dict_field = DictField(default=lambda: {"hello": "world"})
+            objectid_field = ObjectIdField(default=ObjectId)
+            reference_field = ReferenceField(Simple, default=lambda:
+                                                        Simple().save())
+            map_field = MapField(IntField(), default=lambda: {"simple": 1})
+            decimal_field = DecimalField(default=1.0)
+            complex_datetime_field = ComplexDateTimeField(default=datetime.now)
+            url_field = URLField(default="http://mongoengine.org")
+            dynamic_field = DynamicField(default=1)
+            generic_reference_field = GenericReferenceField(
+                                            default=lambda: Simple().save())
+            sorted_list_field = SortedListField(IntField(),
+                                                default=lambda: [1, 2, 3])
+            email_field = EmailField(default="ross@example.com")
+            geo_point_field = GeoPointField(default=lambda: [1, 2])
+            sequence_field = SequenceField()
+            uuid_field = UUIDField(default=uuid.uuid4)
+            generic_embedded_document_field = GenericEmbeddedDocumentField(
+                                        default=lambda: EmbeddedDoc())
+
+            def __eq__(self, other):
+                import json
+                return json.loads(self.to_json()) == json.loads(other.to_json())
+
+        doc = Doc()
+        self.assertEqual(doc, Doc.from_json(doc.to_json()))
+
+
+if __name__ == '__main__':
+    unittest.main()

tests/document/validation.py

@@ -0,0 +1,214 @@
+# -*- coding: utf-8 -*-
+import unittest
+from datetime import datetime
+
+from mongoengine import *
+
+__all__ = ("ValidatorErrorTest",)
+
+
+class ValidatorErrorTest(unittest.TestCase):
+
+    def setUp(self):
+        connect(db='mongoenginetest')
+
+    def test_to_dict(self):
+        """Ensure a ValidationError handles error to_dict correctly.
+        """
+        error = ValidationError('root')
+        self.assertEqual(error.to_dict(), {})
+
+        # 1st level error schema
+        error.errors = {'1st': ValidationError('bad 1st'), }
+        self.assertTrue('1st' in error.to_dict())
+        self.assertEqual(error.to_dict()['1st'], 'bad 1st')
+
+        # 2nd level error schema
+        error.errors = {'1st': ValidationError('bad 1st', errors={
+            '2nd': ValidationError('bad 2nd'),
+        })}
+        self.assertTrue('1st' in error.to_dict())
+        self.assertTrue(isinstance(error.to_dict()['1st'], dict))
+        self.assertTrue('2nd' in error.to_dict()['1st'])
+        self.assertEqual(error.to_dict()['1st']['2nd'], 'bad 2nd')
+
+        # moar levels
+        error.errors = {'1st': ValidationError('bad 1st', errors={
+            '2nd': ValidationError('bad 2nd', errors={
+                '3rd': ValidationError('bad 3rd', errors={
+                    '4th': ValidationError('Inception'),
+                }),
+            }),
+        })}
+        self.assertTrue('1st' in error.to_dict())
+        self.assertTrue('2nd' in error.to_dict()['1st'])
+        self.assertTrue('3rd' in error.to_dict()['1st']['2nd'])
+        self.assertTrue('4th' in error.to_dict()['1st']['2nd']['3rd'])
+        self.assertEqual(error.to_dict()['1st']['2nd']['3rd']['4th'],
+                         'Inception')
+
+        self.assertEqual(error.message, "root(2nd.3rd.4th.Inception: ['1st'])")
+
+    def test_model_validation(self):
+
+        class User(Document):
+            username = StringField(primary_key=True)
+            name = StringField(required=True)
+
+        try:
+            User().validate()
+        except ValidationError as e:
+            self.assertTrue("User:None" in e.message)
+            self.assertEqual(e.to_dict(), {
+                'username': 'Field is required',
+                'name': 'Field is required'})
+
+        user = User(username="RossC0", name="Ross").save()
+        user.name = None
+        try:
+            user.save()
+        except ValidationError as e:
+            self.assertTrue("User:RossC0" in e.message)
+            self.assertEqual(e.to_dict(), {
+                'name': 'Field is required'})
+
+    def test_fields_rewrite(self):
+        class BasePerson(Document):
+            name = StringField()
+            age = IntField()
+            meta = {'abstract': True}
+
+        class Person(BasePerson):
+            name = StringField(required=True)
+
+        p = Person(age=15)
+        self.assertRaises(ValidationError, p.validate)
+
+    def test_embedded_document_validation(self):
+        """Ensure that embedded documents may be validated.
+        """
+        class Comment(EmbeddedDocument):
+            date = DateTimeField()
+            content = StringField(required=True)
+
+        comment = Comment()
+        self.assertRaises(ValidationError, comment.validate)
+
+        comment.content = 'test'
+        comment.validate()
+
+        comment.date = 4
+        self.assertRaises(ValidationError, comment.validate)
+
+        comment.date = datetime.now()
+        comment.validate()
+        self.assertEqual(comment._instance, None)
+
+    def test_embedded_db_field_validate(self):
+
+        class SubDoc(EmbeddedDocument):
+            val = IntField(required=True)
+
+        class Doc(Document):
+            id = StringField(primary_key=True)
+            e = EmbeddedDocumentField(SubDoc, db_field='eb')
+
+        try:
+            Doc(id="bad").validate()
+        except ValidationError as e:
+            self.assertTrue("SubDoc:None" in e.message)
+            self.assertEqual(e.to_dict(), {
+                "e": {'val': 'OK could not be converted to int'}})
+
+        Doc.drop_collection()
+
+        Doc(id="test", e=SubDoc(val=15)).save()
+
+        doc = Doc.objects.first()
+        keys = doc._data.keys()
+        self.assertEqual(2, len(keys))
+        self.assertTrue('e' in keys)
+        self.assertTrue('id' in keys)
+
+        doc.e.val = "OK"
+        try:
+            doc.save()
+        except ValidationError as e:
+            self.assertTrue("Doc:test" in e.message)
+            self.assertEqual(e.to_dict(), {
+                "e": {'val': 'OK could not be converted to int'}})
+
+    def test_embedded_weakref(self):
+
+        class SubDoc(EmbeddedDocument):
+            val = IntField(required=True)
+
+        class Doc(Document):
+            e = EmbeddedDocumentField(SubDoc, db_field='eb')
+
+        Doc.drop_collection()
+
+        d1 = Doc()
+        d2 = Doc()
+
+        s = SubDoc()
+
+        self.assertRaises(ValidationError, s.validate)
+
+        d1.e = s
+        d2.e = s
+
+        del d1
+
+        self.assertRaises(ValidationError, d2.validate)
+
+    def test_parent_reference_in_child_document(self):
+        """
+        Test to ensure a ReferenceField can store a reference to a parent
+        class when inherited. Issue #954.
+        """
+        class Parent(Document):
+            meta = {'allow_inheritance': True}
+            reference = ReferenceField('self')
+
+        class Child(Parent):
+            pass
+
+        parent = Parent()
+        parent.save()
+
+        child = Child(reference=parent)
+
+        # Saving child should not raise a ValidationError
+        try:
+            child.save()
+        except ValidationError as e:
+            self.fail("ValidationError raised: %s" % e.message)
+
+    def test_parent_reference_set_as_attribute_in_child_document(self):
+        """
+        Test to ensure a ReferenceField can store a reference to a parent
+        class when inherited and when set via attribute. Issue #954.
+        """
+        class Parent(Document):
+            meta = {'allow_inheritance': True}
+            reference = ReferenceField('self')
+
+        class Child(Parent):
+            pass
+
+        parent = Parent()
+        parent.save()
+
+        child = Child()
+        child.reference = parent
+
+        # Saving the child should not raise a ValidationError
+        try:
+            child.save()
+        except ValidationError as e:
+            self.fail("ValidationError raised: %s" % e.message)
+
+
+if __name__ == '__main__':
+    unittest.main()

tests/fields/__init__.py

@@ -0,0 +1,3 @@
+from fields import *
+from file_tests import *
+from geo import *

tests/fields/file_tests.py

@@ -0,0 +1,582 @@
+# -*- coding: utf-8 -*-
+import copy
+import os
+import unittest
+import tempfile
+
+import gridfs
+import six
+
+from nose.plugins.skip import SkipTest
+from mongoengine import *
+from mongoengine.connection import get_db
+from mongoengine.python_support import StringIO
+
+try:
+    from PIL import Image
+    HAS_PIL = True
+except ImportError:
+    HAS_PIL = False
+
+from tests.utils import MongoDBTestCase
+
+TEST_IMAGE_PATH = os.path.join(os.path.dirname(__file__), 'mongoengine.png')
+TEST_IMAGE2_PATH = os.path.join(os.path.dirname(__file__), 'mongodb_leaf.png')
+
+
+class FileTest(MongoDBTestCase):
+
+    def tearDown(self):
+        self.db.drop_collection('fs.files')
+        self.db.drop_collection('fs.chunks')
+
+    def test_file_field_optional(self):
+        # Make sure FileField is optional and not required
+        class DemoFile(Document):
+            the_file = FileField()
+        DemoFile.objects.create()
+
+    def test_file_fields(self):
+        """Ensure that file fields can be written to and their data retrieved
+        """
+
+        class PutFile(Document):
+            the_file = FileField()
+
+        PutFile.drop_collection()
+
+        text = six.b('Hello, World!')
+        content_type = 'text/plain'
+
+        putfile = PutFile()
+        putfile.the_file.put(text, content_type=content_type, filename="hello")
+        putfile.save()
+
+        result = PutFile.objects.first()
+        self.assertTrue(putfile == result)
+        self.assertEqual("%s" % result.the_file, "<GridFSProxy: hello>")
+        self.assertEqual(result.the_file.read(), text)
+        self.assertEqual(result.the_file.content_type, content_type)
+        result.the_file.delete()  # Remove file from GridFS
+        PutFile.objects.delete()
+
+        # Ensure file-like objects are stored
+        PutFile.drop_collection()
+
+        putfile = PutFile()
+        putstring = StringIO()
+        putstring.write(text)
+        putstring.seek(0)
+        putfile.the_file.put(putstring, content_type=content_type)
+        putfile.save()
+
+        result = PutFile.objects.first()
+        self.assertTrue(putfile == result)
+        self.assertEqual(result.the_file.read(), text)
+        self.assertEqual(result.the_file.content_type, content_type)
+        result.the_file.delete()
+
+    def test_file_fields_stream(self):
+        """Ensure that file fields can be written to and their data retrieved
+        """
+        class StreamFile(Document):
+            the_file = FileField()
+
+        StreamFile.drop_collection()
+
+        text = six.b('Hello, World!')
+        more_text = six.b('Foo Bar')
+        content_type = 'text/plain'
+
+        streamfile = StreamFile()
+        streamfile.the_file.new_file(content_type=content_type)
+        streamfile.the_file.write(text)
+        streamfile.the_file.write(more_text)
+        streamfile.the_file.close()
+        streamfile.save()
+
+        result = StreamFile.objects.first()
+        self.assertTrue(streamfile == result)
+        self.assertEqual(result.the_file.read(), text + more_text)
+        self.assertEqual(result.the_file.content_type, content_type)
+        result.the_file.seek(0)
+        self.assertEqual(result.the_file.tell(), 0)
+        self.assertEqual(result.the_file.read(len(text)), text)
+        self.assertEqual(result.the_file.tell(), len(text))
+        self.assertEqual(result.the_file.read(len(more_text)), more_text)
+        self.assertEqual(result.the_file.tell(), len(text + more_text))
+        result.the_file.delete()
+
+        # Ensure deleted file returns None
+        self.assertTrue(result.the_file.read() is None)
+
+    def test_file_fields_stream_after_none(self):
+        """Ensure that a file field can be written to after it has been saved as
+        None
+        """
+        class StreamFile(Document):
+            the_file = FileField()
+
+        StreamFile.drop_collection()
+
+        text = six.b('Hello, World!')
+        more_text = six.b('Foo Bar')
+        content_type = 'text/plain'
+
+        streamfile = StreamFile()
+        streamfile.save()
+        streamfile.the_file.new_file()
+        streamfile.the_file.write(text)
+        streamfile.the_file.write(more_text)
+        streamfile.the_file.close()
+        streamfile.save()
+
+        result = StreamFile.objects.first()
+        self.assertTrue(streamfile == result)
+        self.assertEqual(result.the_file.read(), text + more_text)
+        # self.assertEqual(result.the_file.content_type, content_type)
+        result.the_file.seek(0)
+        self.assertEqual(result.the_file.tell(), 0)
+        self.assertEqual(result.the_file.read(len(text)), text)
+        self.assertEqual(result.the_file.tell(), len(text))
+        self.assertEqual(result.the_file.read(len(more_text)), more_text)
+        self.assertEqual(result.the_file.tell(), len(text + more_text))
+        result.the_file.delete()
+
+        # Ensure deleted file returns None
+        self.assertTrue(result.the_file.read() is None)
+
+    def test_file_fields_set(self):
+
+        class SetFile(Document):
+            the_file = FileField()
+
+        text = six.b('Hello, World!')
+        more_text = six.b('Foo Bar')
+
+        SetFile.drop_collection()
+
+        setfile = SetFile()
+        setfile.the_file = text
+        setfile.save()
+
+        result = SetFile.objects.first()
+        self.assertTrue(setfile == result)
+        self.assertEqual(result.the_file.read(), text)
+
+        # Try replacing file with new one
+        result.the_file.replace(more_text)
+        result.save()
+
+        result = SetFile.objects.first()
+        self.assertTrue(setfile == result)
+        self.assertEqual(result.the_file.read(), more_text)
+        result.the_file.delete()
+
+    def test_file_field_no_default(self):
+
+        class GridDocument(Document):
+            the_file = FileField()
+
+        GridDocument.drop_collection()
+
+        with tempfile.TemporaryFile() as f:
+            f.write(six.b("Hello World!"))
+            f.flush()
+
+            # Test without default
+            doc_a = GridDocument()
+            doc_a.save()
+
+            doc_b = GridDocument.objects.with_id(doc_a.id)
+            doc_b.the_file.replace(f, filename='doc_b')
+            doc_b.save()
+            self.assertNotEqual(doc_b.the_file.grid_id, None)
+
+            # Test it matches
+            doc_c = GridDocument.objects.with_id(doc_b.id)
+            self.assertEqual(doc_b.the_file.grid_id, doc_c.the_file.grid_id)
+
+            # Test with default
+            doc_d = GridDocument(the_file=six.b(''))
+            doc_d.save()
+
+            doc_e = GridDocument.objects.with_id(doc_d.id)
+            self.assertEqual(doc_d.the_file.grid_id, doc_e.the_file.grid_id)
+
+            doc_e.the_file.replace(f, filename='doc_e')
+            doc_e.save()
+
+            doc_f = GridDocument.objects.with_id(doc_e.id)
+            self.assertEqual(doc_e.the_file.grid_id, doc_f.the_file.grid_id)
+
+        db = GridDocument._get_db()
+        grid_fs = gridfs.GridFS(db)
+        self.assertEqual(['doc_b', 'doc_e'], grid_fs.list())
+
+    def test_file_uniqueness(self):
+        """Ensure that each instance of a FileField is unique
+        """
+        class TestFile(Document):
+            name = StringField()
+            the_file = FileField()
+
+        # First instance
+        test_file = TestFile()
+        test_file.name = "Hello, World!"
+        test_file.the_file.put(six.b('Hello, World!'))
+        test_file.save()
+
+        # Second instance
+        test_file_dupe = TestFile()
+        data = test_file_dupe.the_file.read()  # Should be None
+
+        self.assertTrue(test_file.name != test_file_dupe.name)
+        self.assertTrue(test_file.the_file.read() != data)
+
+        TestFile.drop_collection()
+
+    def test_file_saving(self):
+        """Ensure you can add meta data to file"""
+
+        class Animal(Document):
+            genus = StringField()
+            family = StringField()
+            photo = FileField()
+
+        Animal.drop_collection()
+        marmot = Animal(genus='Marmota', family='Sciuridae')
+
+        marmot_photo = open(TEST_IMAGE_PATH, 'rb')  # Retrieve a photo from disk
+        marmot.photo.put(marmot_photo, content_type='image/jpeg', foo='bar')
+        marmot.photo.close()
+        marmot.save()
+
+        marmot = Animal.objects.get()
+        self.assertEqual(marmot.photo.content_type, 'image/jpeg')
+        self.assertEqual(marmot.photo.foo, 'bar')
+
+    def test_file_reassigning(self):
+        class TestFile(Document):
+            the_file = FileField()
+        TestFile.drop_collection()
+
+        test_file = TestFile(the_file=open(TEST_IMAGE_PATH, 'rb')).save()
+        self.assertEqual(test_file.the_file.get().length, 8313)
+
+        test_file = TestFile.objects.first()
+        test_file.the_file = open(TEST_IMAGE2_PATH, 'rb')
+        test_file.save()
+        self.assertEqual(test_file.the_file.get().length, 4971)
+
+    def test_file_boolean(self):
+        """Ensure that a boolean test of a FileField indicates its presence
+        """
+        class TestFile(Document):
+            the_file = FileField()
+        TestFile.drop_collection()
+
+        test_file = TestFile()
+        self.assertFalse(bool(test_file.the_file))
+        test_file.the_file.put(six.b('Hello, World!'), content_type='text/plain')
+        test_file.save()
+        self.assertTrue(bool(test_file.the_file))
+
+        test_file = TestFile.objects.first()
+        self.assertEqual(test_file.the_file.content_type, "text/plain")
+
+    def test_file_cmp(self):
+        """Test comparing against other types"""
+        class TestFile(Document):
+            the_file = FileField()
+
+        test_file = TestFile()
+        self.assertFalse(test_file.the_file in [{"test": 1}])
+
+    def test_file_disk_space(self):
+        """ Test disk space usage when we delete/replace a file """
+        class TestFile(Document):
+            the_file = FileField()
+
+        text = six.b('Hello, World!')
+        content_type = 'text/plain'
+
+        testfile = TestFile()
+        testfile.the_file.put(text, content_type=content_type, filename="hello")
+        testfile.save()
+
+        # Now check fs.files and fs.chunks
+        db = TestFile._get_db()
+
+        files = db.fs.files.find()
+        chunks = db.fs.chunks.find()
+        self.assertEquals(len(list(files)), 1)
+        self.assertEquals(len(list(chunks)), 1)
+
+        # Deleting the docoument should delete the files
+        testfile.delete()
+
+        files = db.fs.files.find()
+        chunks = db.fs.chunks.find()
+        self.assertEquals(len(list(files)), 0)
+        self.assertEquals(len(list(chunks)), 0)
+
+        # Test case where we don't store a file in the first place
+        testfile = TestFile()
+        testfile.save()
+
+        files = db.fs.files.find()
+        chunks = db.fs.chunks.find()
+        self.assertEquals(len(list(files)), 0)
+        self.assertEquals(len(list(chunks)), 0)
+
+        testfile.delete()
+
+        files = db.fs.files.find()
+        chunks = db.fs.chunks.find()
+        self.assertEquals(len(list(files)), 0)
+        self.assertEquals(len(list(chunks)), 0)
+
+        # Test case where we overwrite the file
+        testfile = TestFile()
+        testfile.the_file.put(text, content_type=content_type, filename="hello")
+        testfile.save()
+
+        text = six.b('Bonjour, World!')
+        testfile.the_file.replace(text, content_type=content_type, filename="hello")
+        testfile.save()
+
+        files = db.fs.files.find()
+        chunks = db.fs.chunks.find()
+        self.assertEquals(len(list(files)), 1)
+        self.assertEquals(len(list(chunks)), 1)
+
+        testfile.delete()
+
+        files = db.fs.files.find()
+        chunks = db.fs.chunks.find()
+        self.assertEquals(len(list(files)), 0)
+        self.assertEquals(len(list(chunks)), 0)
+
+    def test_image_field(self):
+        if not HAS_PIL:
+            raise SkipTest('PIL not installed')
+
+        class TestImage(Document):
+            image = ImageField()
+
+        TestImage.drop_collection()
+
+        with tempfile.TemporaryFile() as f:
+            f.write(six.b("Hello World!"))
+            f.flush()
+
+            t = TestImage()
+            try:
+                t.image.put(f)
+                self.fail("Should have raised an invalidation error")
+            except ValidationError as e:
+                self.assertEqual("%s" % e, "Invalid image: cannot identify image file %s" % f)
+
+        t = TestImage()
+        t.image.put(open(TEST_IMAGE_PATH, 'rb'))
+        t.save()
+
+        t = TestImage.objects.first()
+
+        self.assertEqual(t.image.format, 'PNG')
+
+        w, h = t.image.size
+        self.assertEqual(w, 371)
+        self.assertEqual(h, 76)
+
+        t.image.delete()
+
+    def test_image_field_reassigning(self):
+        if not HAS_PIL:
+            raise SkipTest('PIL not installed')
+
+        class TestFile(Document):
+            the_file = ImageField()
+        TestFile.drop_collection()
+
+        test_file = TestFile(the_file=open(TEST_IMAGE_PATH, 'rb')).save()
+        self.assertEqual(test_file.the_file.size, (371, 76))
+
+        test_file = TestFile.objects.first()
+        test_file.the_file = open(TEST_IMAGE2_PATH, 'rb')
+        test_file.save()
+        self.assertEqual(test_file.the_file.size, (45, 101))
+
+    def test_image_field_resize(self):
+        if not HAS_PIL:
+            raise SkipTest('PIL not installed')
+
+        class TestImage(Document):
+            image = ImageField(size=(185, 37))
+
+        TestImage.drop_collection()
+
+        t = TestImage()
+        t.image.put(open(TEST_IMAGE_PATH, 'rb'))
+        t.save()
+
+        t = TestImage.objects.first()
+
+        self.assertEqual(t.image.format, 'PNG')
+        w, h = t.image.size
+
+        self.assertEqual(w, 185)
+        self.assertEqual(h, 37)
+
+        t.image.delete()
+
+    def test_image_field_resize_force(self):
+        if not HAS_PIL:
+            raise SkipTest('PIL not installed')
+
+        class TestImage(Document):
+            image = ImageField(size=(185, 37, True))
+
+        TestImage.drop_collection()
+
+        t = TestImage()
+        t.image.put(open(TEST_IMAGE_PATH, 'rb'))
+        t.save()
+
+        t = TestImage.objects.first()
+
+        self.assertEqual(t.image.format, 'PNG')
+        w, h = t.image.size
+
+        self.assertEqual(w, 185)
+        self.assertEqual(h, 37)
+
+        t.image.delete()
+
+    def test_image_field_thumbnail(self):
+        if not HAS_PIL:
+            raise SkipTest('PIL not installed')
+
+        class TestImage(Document):
+            image = ImageField(thumbnail_size=(92, 18))
+
+        TestImage.drop_collection()
+
+        t = TestImage()
+        t.image.put(open(TEST_IMAGE_PATH, 'rb'))
+        t.save()
+
+        t = TestImage.objects.first()
+
+        self.assertEqual(t.image.thumbnail.format, 'PNG')
+        self.assertEqual(t.image.thumbnail.width, 92)
+        self.assertEqual(t.image.thumbnail.height, 18)
+
+        t.image.delete()
+
+    def test_file_multidb(self):
+        register_connection('test_files', 'test_files')
+
+        class TestFile(Document):
+            name = StringField()
+            the_file = FileField(db_alias="test_files",
+                                 collection_name="macumba")
+
+        TestFile.drop_collection()
+
+        # delete old filesystem
+        get_db("test_files").macumba.files.drop()
+        get_db("test_files").macumba.chunks.drop()
+
+        # First instance
+        test_file = TestFile()
+        test_file.name = "Hello, World!"
+        test_file.the_file.put(six.b('Hello, World!'),
+                          name="hello.txt")
+        test_file.save()
+
+        data = get_db("test_files").macumba.files.find_one()
+        self.assertEqual(data.get('name'), 'hello.txt')
+
+        test_file = TestFile.objects.first()
+        self.assertEqual(test_file.the_file.read(), six.b('Hello, World!'))
+
+        test_file = TestFile.objects.first()
+        test_file.the_file = six.b('HELLO, WORLD!')
+        test_file.save()
+
+        test_file = TestFile.objects.first()
+        self.assertEqual(test_file.the_file.read(),
+                         six.b('HELLO, WORLD!'))
+
+    def test_copyable(self):
+        class PutFile(Document):
+            the_file = FileField()
+
+        PutFile.drop_collection()
+
+        text = six.b('Hello, World!')
+        content_type = 'text/plain'
+
+        putfile = PutFile()
+        putfile.the_file.put(text, content_type=content_type)
+        putfile.save()
+
+        class TestFile(Document):
+            name = StringField()
+
+        self.assertEqual(putfile, copy.copy(putfile))
+        self.assertEqual(putfile, copy.deepcopy(putfile))
+
+    def test_get_image_by_grid_id(self):
+
+        if not HAS_PIL:
+            raise SkipTest('PIL not installed')
+
+        class TestImage(Document):
+
+            image1 = ImageField()
+            image2 = ImageField()
+
+        TestImage.drop_collection()
+
+        t = TestImage()
+        t.image1.put(open(TEST_IMAGE_PATH, 'rb'))
+        t.image2.put(open(TEST_IMAGE2_PATH, 'rb'))
+        t.save()
+
+        test = TestImage.objects.first()
+        grid_id = test.image1.grid_id
+
+        self.assertEqual(1, TestImage.objects(Q(image1=grid_id)
+                                              or Q(image2=grid_id)).count())
+
+    def test_complex_field_filefield(self):
+        """Ensure you can add meta data to file"""
+
+        class Animal(Document):
+            genus = StringField()
+            family = StringField()
+            photos = ListField(FileField())
+
+        Animal.drop_collection()
+        marmot = Animal(genus='Marmota', family='Sciuridae')
+
+        marmot_photo = open(TEST_IMAGE_PATH, 'rb')  # Retrieve a photo from disk
+
+        photos_field = marmot._fields['photos'].field
+        new_proxy = photos_field.get_proxy_obj('photos', marmot)
+        new_proxy.put(marmot_photo, content_type='image/jpeg', foo='bar')
+        marmot_photo.close()
+
+        marmot.photos.append(new_proxy)
+        marmot.save()
+
+        marmot = Animal.objects.get()
+        self.assertEqual(marmot.photos[0].content_type, 'image/jpeg')
+        self.assertEqual(marmot.photos[0].foo, 'bar')
+        self.assertEqual(marmot.photos[0].get().length, 8313)
+
+if __name__ == '__main__':
+    unittest.main()

tests/fields/geo.py

@@ -0,0 +1,387 @@
+# -*- coding: utf-8 -*-
+import unittest
+
+from mongoengine import *
+from mongoengine.connection import get_db
+
+__all__ = ("GeoFieldTest", )
+
+
+class GeoFieldTest(unittest.TestCase):
+
+    def setUp(self):
+        connect(db='mongoenginetest')
+        self.db = get_db()
+
+    def _test_for_expected_error(self, Cls, loc, expected):
+        try:
+            Cls(loc=loc).validate()
+            self.fail('Should not validate the location {0}'.format(loc))
+        except ValidationError as e:
+            self.assertEqual(expected, e.to_dict()['loc'])
+
+    def test_geopoint_validation(self):
+        class Location(Document):
+            loc = GeoPointField()
+
+        invalid_coords = [{"x": 1, "y": 2}, 5, "a"]
+        expected = 'GeoPointField can only accept tuples or lists of (x, y)'
+
+        for coord in invalid_coords:
+            self._test_for_expected_error(Location, coord, expected)
+
+        invalid_coords = [[], [1], [1, 2, 3]]
+        for coord in invalid_coords:
+            expected = "Value (%s) must be a two-dimensional point" % repr(coord)
+            self._test_for_expected_error(Location, coord, expected)
+
+        invalid_coords = [[{}, {}], ("a", "b")]
+        for coord in invalid_coords:
+            expected = "Both values (%s) in point must be float or int" % repr(coord)
+            self._test_for_expected_error(Location, coord, expected)
+
+    def test_point_validation(self):
+        class Location(Document):
+            loc = PointField()
+
+        invalid_coords = {"x": 1, "y": 2}
+        expected = 'PointField can only accept a valid GeoJson dictionary or lists of (x, y)'
+        self._test_for_expected_error(Location, invalid_coords, expected)
+
+        invalid_coords = {"type": "MadeUp", "coordinates": []}
+        expected = 'PointField type must be "Point"'
+        self._test_for_expected_error(Location, invalid_coords, expected)
+
+        invalid_coords = {"type": "Point", "coordinates": [1, 2, 3]}
+        expected = "Value ([1, 2, 3]) must be a two-dimensional point"
+        self._test_for_expected_error(Location, invalid_coords, expected)
+
+        invalid_coords = [5, "a"]
+        expected = "PointField can only accept lists of [x, y]"
+        for coord in invalid_coords:
+            self._test_for_expected_error(Location, coord, expected)
+
+        invalid_coords = [[], [1], [1, 2, 3]]
+        for coord in invalid_coords:
+            expected = "Value (%s) must be a two-dimensional point" % repr(coord)
+            self._test_for_expected_error(Location, coord, expected)
+
+        invalid_coords = [[{}, {}], ("a", "b")]
+        for coord in invalid_coords:
+            expected = "Both values (%s) in point must be float or int" % repr(coord)
+            self._test_for_expected_error(Location, coord, expected)
+
+        Location(loc=[1, 2]).validate()
+        Location(loc={
+            "type": "Point",
+            "coordinates": [
+              81.4471435546875,
+              23.61432859499169
+            ]}).validate()
+
+    def test_linestring_validation(self):
+        class Location(Document):
+            loc = LineStringField()
+
+        invalid_coords = {"x": 1, "y": 2}
+        expected = 'LineStringField can only accept a valid GeoJson dictionary or lists of (x, y)'
+        self._test_for_expected_error(Location, invalid_coords, expected)
+
+        invalid_coords = {"type": "MadeUp", "coordinates": [[]]}
+        expected = 'LineStringField type must be "LineString"'
+        self._test_for_expected_error(Location, invalid_coords, expected)
+
+        invalid_coords = {"type": "LineString", "coordinates": [[1, 2, 3]]}
+        expected = "Invalid LineString:\nValue ([1, 2, 3]) must be a two-dimensional point"
+        self._test_for_expected_error(Location, invalid_coords, expected)
+
+        invalid_coords = [5, "a"]
+        expected = "Invalid LineString must contain at least one valid point"
+        self._test_for_expected_error(Location, invalid_coords, expected)
+
+        invalid_coords = [[1]]
+        expected = "Invalid LineString:\nValue (%s) must be a two-dimensional point" % repr(invalid_coords[0])
+        self._test_for_expected_error(Location, invalid_coords, expected)
+
+        invalid_coords = [[1, 2, 3]]
+        expected = "Invalid LineString:\nValue (%s) must be a two-dimensional point" % repr(invalid_coords[0])
+        self._test_for_expected_error(Location, invalid_coords, expected)
+
+        invalid_coords = [[[{}, {}]], [("a", "b")]]
+        for coord in invalid_coords:
+            expected = "Invalid LineString:\nBoth values (%s) in point must be float or int" % repr(coord[0])
+            self._test_for_expected_error(Location, coord, expected)
+
+        Location(loc=[[1, 2], [3, 4], [5, 6], [1, 2]]).validate()
+
+    def test_polygon_validation(self):
+        class Location(Document):
+            loc = PolygonField()
+
+        invalid_coords = {"x": 1, "y": 2}
+        expected = 'PolygonField can only accept a valid GeoJson dictionary or lists of (x, y)'
+        self._test_for_expected_error(Location, invalid_coords, expected)
+
+        invalid_coords = {"type": "MadeUp", "coordinates": [[]]}
+        expected = 'PolygonField type must be "Polygon"'
+        self._test_for_expected_error(Location, invalid_coords, expected)
+
+        invalid_coords = {"type": "Polygon", "coordinates": [[[1, 2, 3]]]}
+        expected = "Invalid Polygon:\nValue ([1, 2, 3]) must be a two-dimensional point"
+        self._test_for_expected_error(Location, invalid_coords, expected)
+
+        invalid_coords = [[[5, "a"]]]
+        expected = "Invalid Polygon:\nBoth values ([5, 'a']) in point must be float or int"
+        self._test_for_expected_error(Location, invalid_coords, expected)
+
+        invalid_coords = [[[]]]
+        expected = "Invalid Polygon must contain at least one valid linestring"
+        self._test_for_expected_error(Location, invalid_coords, expected)
+
+        invalid_coords = [[[1, 2, 3]]]
+        expected = "Invalid Polygon:\nValue ([1, 2, 3]) must be a two-dimensional point"
+        self._test_for_expected_error(Location, invalid_coords, expected)
+
+        invalid_coords = [[[{}, {}]], [("a", "b")]]
+        expected = "Invalid Polygon:\nBoth values ([{}, {}]) in point must be float or int, Both values (('a', 'b')) in point must be float or int"
+        self._test_for_expected_error(Location, invalid_coords, expected)
+
+        invalid_coords = [[[1, 2], [3, 4]]]
+        expected = "Invalid Polygon:\nLineStrings must start and end at the same point"
+        self._test_for_expected_error(Location, invalid_coords, expected)
+
+        Location(loc=[[[1, 2], [3, 4], [5, 6], [1, 2]]]).validate()
+
+    def test_multipoint_validation(self):
+        class Location(Document):
+            loc = MultiPointField()
+
+        invalid_coords = {"x": 1, "y": 2}
+        expected = 'MultiPointField can only accept a valid GeoJson dictionary or lists of (x, y)'
+        self._test_for_expected_error(Location, invalid_coords, expected)
+
+        invalid_coords = {"type": "MadeUp", "coordinates": [[]]}
+        expected = 'MultiPointField type must be "MultiPoint"'
+        self._test_for_expected_error(Location, invalid_coords, expected)
+
+        invalid_coords = {"type": "MultiPoint", "coordinates": [[1, 2, 3]]}
+        expected = "Value ([1, 2, 3]) must be a two-dimensional point"
+        self._test_for_expected_error(Location, invalid_coords, expected)
+
+        invalid_coords = [[]]
+        expected = "Invalid MultiPoint must contain at least one valid point"
+        self._test_for_expected_error(Location, invalid_coords, expected)
+
+        invalid_coords = [[[1]], [[1, 2, 3]]]
+        for coord in invalid_coords:
+            expected = "Value (%s) must be a two-dimensional point" % repr(coord[0])
+            self._test_for_expected_error(Location, coord, expected)
+
+        invalid_coords = [[[{}, {}]], [("a", "b")]]
+        for coord in invalid_coords:
+            expected = "Both values (%s) in point must be float or int" % repr(coord[0])
+            self._test_for_expected_error(Location, coord, expected)
+
+        Location(loc=[[1, 2]]).validate()
+        Location(loc={
+            "type": "MultiPoint",
+            "coordinates": [
+                [1, 2],
+                [81.4471435546875, 23.61432859499169]
+            ]}).validate()
+
+    def test_multilinestring_validation(self):
+        class Location(Document):
+            loc = MultiLineStringField()
+
+        invalid_coords = {"x": 1, "y": 2}
+        expected = 'MultiLineStringField can only accept a valid GeoJson dictionary or lists of (x, y)'
+        self._test_for_expected_error(Location, invalid_coords, expected)
+
+        invalid_coords = {"type": "MadeUp", "coordinates": [[]]}
+        expected = 'MultiLineStringField type must be "MultiLineString"'
+        self._test_for_expected_error(Location, invalid_coords, expected)
+
+        invalid_coords = {"type": "MultiLineString", "coordinates": [[[1, 2, 3]]]}
+        expected = "Invalid MultiLineString:\nValue ([1, 2, 3]) must be a two-dimensional point"
+        self._test_for_expected_error(Location, invalid_coords, expected)
+
+        invalid_coords = [5, "a"]
+        expected = "Invalid MultiLineString must contain at least one valid linestring"
+        self._test_for_expected_error(Location, invalid_coords, expected)
+
+        invalid_coords = [[[1]]]
+        expected = "Invalid MultiLineString:\nValue (%s) must be a two-dimensional point" % repr(invalid_coords[0][0])
+        self._test_for_expected_error(Location, invalid_coords, expected)
+
+        invalid_coords = [[[1, 2, 3]]]
+        expected = "Invalid MultiLineString:\nValue (%s) must be a two-dimensional point" % repr(invalid_coords[0][0])
+        self._test_for_expected_error(Location, invalid_coords, expected)
+
+        invalid_coords = [[[[{}, {}]]], [[("a", "b")]]]
+        for coord in invalid_coords:
+            expected = "Invalid MultiLineString:\nBoth values (%s) in point must be float or int" % repr(coord[0][0])
+            self._test_for_expected_error(Location, coord, expected)
+
+        Location(loc=[[[1, 2], [3, 4], [5, 6], [1, 2]]]).validate()
+
+    def test_multipolygon_validation(self):
+        class Location(Document):
+            loc = MultiPolygonField()
+
+        invalid_coords = {"x": 1, "y": 2}
+        expected = 'MultiPolygonField can only accept a valid GeoJson dictionary or lists of (x, y)'
+        self._test_for_expected_error(Location, invalid_coords, expected)
+
+        invalid_coords = {"type": "MadeUp", "coordinates": [[]]}
+        expected = 'MultiPolygonField type must be "MultiPolygon"'
+        self._test_for_expected_error(Location, invalid_coords, expected)
+
+        invalid_coords = {"type": "MultiPolygon", "coordinates": [[[[1, 2, 3]]]]}
+        expected = "Invalid MultiPolygon:\nValue ([1, 2, 3]) must be a two-dimensional point"
+        self._test_for_expected_error(Location, invalid_coords, expected)
+
+        invalid_coords = [[[[5, "a"]]]]
+        expected = "Invalid MultiPolygon:\nBoth values ([5, 'a']) in point must be float or int"
+        self._test_for_expected_error(Location, invalid_coords, expected)
+
+        invalid_coords = [[[[]]]]
+        expected = "Invalid MultiPolygon must contain at least one valid Polygon"
+        self._test_for_expected_error(Location, invalid_coords, expected)
+
+        invalid_coords = [[[[1, 2, 3]]]]
+        expected = "Invalid MultiPolygon:\nValue ([1, 2, 3]) must be a two-dimensional point"
+        self._test_for_expected_error(Location, invalid_coords, expected)
+
+        invalid_coords = [[[[{}, {}]]], [[("a", "b")]]]
+        expected = "Invalid MultiPolygon:\nBoth values ([{}, {}]) in point must be float or int, Both values (('a', 'b')) in point must be float or int"
+        self._test_for_expected_error(Location, invalid_coords, expected)
+
+        invalid_coords = [[[[1, 2], [3, 4]]]]
+        expected = "Invalid MultiPolygon:\nLineStrings must start and end at the same point"
+        self._test_for_expected_error(Location, invalid_coords, expected)
+
+        Location(loc=[[[[1, 2], [3, 4], [5, 6], [1, 2]]]]).validate()
+
+    def test_indexes_geopoint(self):
+        """Ensure that indexes are created automatically for GeoPointFields.
+        """
+        class Event(Document):
+            title = StringField()
+            location = GeoPointField()
+
+        geo_indicies = Event._geo_indices()
+        self.assertEqual(geo_indicies, [{'fields': [('location', '2d')]}])
+
+    def test_geopoint_embedded_indexes(self):
+        """Ensure that indexes are created automatically for GeoPointFields on
+        embedded documents.
+        """
+        class Venue(EmbeddedDocument):
+            location = GeoPointField()
+            name = StringField()
+
+        class Event(Document):
+            title = StringField()
+            venue = EmbeddedDocumentField(Venue)
+
+        geo_indicies = Event._geo_indices()
+        self.assertEqual(geo_indicies, [{'fields': [('venue.location', '2d')]}])
+
+    def test_indexes_2dsphere(self):
+        """Ensure that indexes are created automatically for GeoPointFields.
+        """
+        class Event(Document):
+            title = StringField()
+            point = PointField()
+            line = LineStringField()
+            polygon = PolygonField()
+
+        geo_indicies = Event._geo_indices()
+        self.assertTrue({'fields': [('line', '2dsphere')]} in geo_indicies)
+        self.assertTrue({'fields': [('polygon', '2dsphere')]} in geo_indicies)
+        self.assertTrue({'fields': [('point', '2dsphere')]} in geo_indicies)
+
+    def test_indexes_2dsphere_embedded(self):
+        """Ensure that indexes are created automatically for GeoPointFields.
+        """
+        class Venue(EmbeddedDocument):
+            name = StringField()
+            point = PointField()
+            line = LineStringField()
+            polygon = PolygonField()
+
+        class Event(Document):
+            title = StringField()
+            venue = EmbeddedDocumentField(Venue)
+
+        geo_indicies = Event._geo_indices()
+        self.assertTrue({'fields': [('venue.line', '2dsphere')]} in geo_indicies)
+        self.assertTrue({'fields': [('venue.polygon', '2dsphere')]} in geo_indicies)
+        self.assertTrue({'fields': [('venue.point', '2dsphere')]} in geo_indicies)
+
+    def test_geo_indexes_recursion(self):
+
+        class Location(Document):
+            name = StringField()
+            location = GeoPointField()
+
+        class Parent(Document):
+            name = StringField()
+            location = ReferenceField(Location)
+
+        Location.drop_collection()
+        Parent.drop_collection()
+
+        Parent(name='Berlin').save()
+        info = Parent._get_collection().index_information()
+        self.assertFalse('location_2d' in info)
+        info = Location._get_collection().index_information()
+        self.assertTrue('location_2d' in info)
+
+        self.assertEqual(len(Parent._geo_indices()), 0)
+        self.assertEqual(len(Location._geo_indices()), 1)
+
+    def test_geo_indexes_auto_index(self):
+
+        # Test just listing the fields
+        class Log(Document):
+            location = PointField(auto_index=False)
+            datetime = DateTimeField()
+
+            meta = {
+                'indexes': [[("location", "2dsphere"), ("datetime", 1)]]
+            }
+
+        self.assertEqual([], Log._geo_indices())
+
+        Log.drop_collection()
+        Log.ensure_indexes()
+
+        info = Log._get_collection().index_information()
+        self.assertEqual(info["location_2dsphere_datetime_1"]["key"],
+                         [('location', '2dsphere'), ('datetime', 1)])
+
+        # Test listing explicitly
+        class Log(Document):
+            location = PointField(auto_index=False)
+            datetime = DateTimeField()
+
+            meta = {
+                'indexes': [
+                    {'fields': [("location", "2dsphere"), ("datetime", 1)]}
+                ]
+            }
+
+        self.assertEqual([], Log._geo_indices())
+
+        Log.drop_collection()
+        Log.ensure_indexes()
+
+        info = Log._get_collection().index_information()
+        self.assertEqual(info["location_2dsphere_datetime_1"]["key"],
+                         [('location', '2dsphere'), ('datetime', 1)])
+
+
+if __name__ == '__main__':
+    unittest.main()

tests/fixtures.py

@@ -1,6 +1,8 @@
+import pickle
 from datetime import datetime
 
 from mongoengine import *
+from mongoengine import signals
 
 
 class PickleEmbedded(EmbeddedDocument):
@@ -15,6 +17,41 @@ class PickleTest(Document):
     photo = FileField()
 
 
+class NewDocumentPickleTest(Document):
+    number = IntField()
+    string = StringField(choices=(('One', '1'), ('Two', '2')))
+    embedded = EmbeddedDocumentField(PickleEmbedded)
+    lists = ListField(StringField())
+    photo = FileField()
+    new_field = StringField()
+
+
+class PickleDynamicEmbedded(DynamicEmbeddedDocument):
+    date = DateTimeField(default=datetime.now)
+
+
+class PickleDynamicTest(DynamicDocument):
+    number = IntField()
+
+
+class PickleSignalsTest(Document):
+    number = IntField()
+    string = StringField(choices=(('One', '1'), ('Two', '2')))
+    embedded = EmbeddedDocumentField(PickleEmbedded)
+    lists = ListField(StringField())
+
+    @classmethod
+    def post_save(self, sender, document, created, **kwargs):
+        pickled = pickle.dumps(document)
+
+    @classmethod
+    def post_delete(self, sender, document, **kwargs):
+        pickled = pickle.dumps(document)
+
+signals.post_save.connect(PickleSignalsTest.post_save, sender=PickleSignalsTest)
+signals.post_delete.connect(PickleSignalsTest.post_delete, sender=PickleSignalsTest)
+
+
 class Mixin(object):
     name = StringField()
 

tests/queryset/__init__.py

@@ -0,0 +1,6 @@
+from transform import *
+from field_list import *
+from queryset import *
+from visitor import *
+from geo import *
+from modify import *

tests/queryset/field_list.py

@@ -0,0 +1,440 @@
+import unittest
+
+from mongoengine import *
+from mongoengine.queryset import QueryFieldList
+
+__all__ = ("QueryFieldListTest", "OnlyExcludeAllTest")
+
+
+class QueryFieldListTest(unittest.TestCase):
+
+    def test_empty(self):
+        q = QueryFieldList()
+        self.assertFalse(q)
+
+        q = QueryFieldList(always_include=['_cls'])
+        self.assertFalse(q)
+
+    def test_include_include(self):
+        q = QueryFieldList()
+        q += QueryFieldList(fields=['a', 'b'], value=QueryFieldList.ONLY, _only_called=True)
+        self.assertEqual(q.as_dict(), {'a': 1, 'b': 1})
+        q += QueryFieldList(fields=['b', 'c'], value=QueryFieldList.ONLY)
+        self.assertEqual(q.as_dict(), {'a': 1, 'b': 1, 'c': 1})
+
+    def test_include_exclude(self):
+        q = QueryFieldList()
+        q += QueryFieldList(fields=['a', 'b'], value=QueryFieldList.ONLY)
+        self.assertEqual(q.as_dict(), {'a': 1, 'b': 1})
+        q += QueryFieldList(fields=['b', 'c'], value=QueryFieldList.EXCLUDE)
+        self.assertEqual(q.as_dict(), {'a': 1})
+
+    def test_exclude_exclude(self):
+        q = QueryFieldList()
+        q += QueryFieldList(fields=['a', 'b'], value=QueryFieldList.EXCLUDE)
+        self.assertEqual(q.as_dict(), {'a': 0, 'b': 0})
+        q += QueryFieldList(fields=['b', 'c'], value=QueryFieldList.EXCLUDE)
+        self.assertEqual(q.as_dict(), {'a': 0, 'b': 0, 'c': 0})
+
+    def test_exclude_include(self):
+        q = QueryFieldList()
+        q += QueryFieldList(fields=['a', 'b'], value=QueryFieldList.EXCLUDE)
+        self.assertEqual(q.as_dict(), {'a': 0, 'b': 0})
+        q += QueryFieldList(fields=['b', 'c'], value=QueryFieldList.ONLY)
+        self.assertEqual(q.as_dict(), {'c': 1})
+
+    def test_always_include(self):
+        q = QueryFieldList(always_include=['x', 'y'])
+        q += QueryFieldList(fields=['a', 'b', 'x'], value=QueryFieldList.EXCLUDE)
+        q += QueryFieldList(fields=['b', 'c'], value=QueryFieldList.ONLY)
+        self.assertEqual(q.as_dict(), {'x': 1, 'y': 1, 'c': 1})
+
+    def test_reset(self):
+        q = QueryFieldList(always_include=['x', 'y'])
+        q += QueryFieldList(fields=['a', 'b', 'x'], value=QueryFieldList.EXCLUDE)
+        q += QueryFieldList(fields=['b', 'c'], value=QueryFieldList.ONLY)
+        self.assertEqual(q.as_dict(), {'x': 1, 'y': 1, 'c': 1})
+        q.reset()
+        self.assertFalse(q)
+        q += QueryFieldList(fields=['b', 'c'], value=QueryFieldList.ONLY)
+        self.assertEqual(q.as_dict(), {'x': 1, 'y': 1, 'b': 1, 'c': 1})
+
+    def test_using_a_slice(self):
+        q = QueryFieldList()
+        q += QueryFieldList(fields=['a'], value={"$slice": 5})
+        self.assertEqual(q.as_dict(), {'a': {"$slice": 5}})
+
+
+class OnlyExcludeAllTest(unittest.TestCase):
+
+    def setUp(self):
+        connect(db='mongoenginetest')
+
+        class Person(Document):
+            name = StringField()
+            age = IntField()
+            meta = {'allow_inheritance': True}
+
+        Person.drop_collection()
+        self.Person = Person
+
+    def test_mixing_only_exclude(self):
+
+        class MyDoc(Document):
+            a = StringField()
+            b = StringField()
+            c = StringField()
+            d = StringField()
+            e = StringField()
+            f = StringField()
+
+        include = ['a', 'b', 'c', 'd', 'e']
+        exclude = ['d', 'e']
+        only = ['b', 'c']
+
+        qs = MyDoc.objects.fields(**{i: 1 for i in include})
+        self.assertEqual(qs._loaded_fields.as_dict(),
+                         {'a': 1, 'b': 1, 'c': 1, 'd': 1, 'e': 1})
+        qs = qs.only(*only)
+        self.assertEqual(qs._loaded_fields.as_dict(), {'b': 1, 'c': 1})
+        qs = qs.exclude(*exclude)
+        self.assertEqual(qs._loaded_fields.as_dict(), {'b': 1, 'c': 1})
+
+        qs = MyDoc.objects.fields(**{i: 1 for i in include})
+        qs = qs.exclude(*exclude)
+        self.assertEqual(qs._loaded_fields.as_dict(), {'a': 1, 'b': 1, 'c': 1})
+        qs = qs.only(*only)
+        self.assertEqual(qs._loaded_fields.as_dict(), {'b': 1, 'c': 1})
+
+        qs = MyDoc.objects.exclude(*exclude)
+        qs = qs.fields(**{i: 1 for i in include})
+        self.assertEqual(qs._loaded_fields.as_dict(), {'a': 1, 'b': 1, 'c': 1})
+        qs = qs.only(*only)
+        self.assertEqual(qs._loaded_fields.as_dict(), {'b': 1, 'c': 1})
+
+    def test_slicing(self):
+
+        class MyDoc(Document):
+            a = ListField()
+            b = ListField()
+            c = ListField()
+            d = ListField()
+            e = ListField()
+            f = ListField()
+
+        include = ['a', 'b', 'c', 'd', 'e']
+        exclude = ['d', 'e']
+        only = ['b', 'c']
+
+        qs = MyDoc.objects.fields(**{i: 1 for i in include})
+        qs = qs.exclude(*exclude)
+        qs = qs.only(*only)
+        qs = qs.fields(slice__b=5)
+        self.assertEqual(qs._loaded_fields.as_dict(),
+                         {'b': {'$slice': 5}, 'c': 1})
+
+        qs = qs.fields(slice__c=[5, 1])
+        self.assertEqual(qs._loaded_fields.as_dict(),
+                         {'b': {'$slice': 5}, 'c': {'$slice': [5, 1]}})
+
+        qs = qs.exclude('c')
+        self.assertEqual(qs._loaded_fields.as_dict(),
+                         {'b': {'$slice': 5}})
+
+    def test_mix_slice_with_other_fields(self):
+        class MyDoc(Document):
+            a = ListField()
+            b = ListField()
+            c = ListField()
+
+        qs = MyDoc.objects.fields(a=1, b=0, slice__c=2)
+        self.assertEqual(qs._loaded_fields.as_dict(),
+                         {'c': {'$slice': 2}, 'a': 1})
+
+    def test_only(self):
+        """Ensure that QuerySet.only only returns the requested fields.
+        """
+        person = self.Person(name='test', age=25)
+        person.save()
+
+        obj = self.Person.objects.only('name').get()
+        self.assertEqual(obj.name, person.name)
+        self.assertEqual(obj.age, None)
+
+        obj = self.Person.objects.only('age').get()
+        self.assertEqual(obj.name, None)
+        self.assertEqual(obj.age, person.age)
+
+        obj = self.Person.objects.only('name', 'age').get()
+        self.assertEqual(obj.name, person.name)
+        self.assertEqual(obj.age, person.age)
+
+        obj = self.Person.objects.only(*('id', 'name',)).get()
+        self.assertEqual(obj.name, person.name)
+        self.assertEqual(obj.age, None)
+
+        # Check polymorphism still works
+        class Employee(self.Person):
+            salary = IntField(db_field='wage')
+
+        employee = Employee(name='test employee', age=40, salary=30000)
+        employee.save()
+
+        obj = self.Person.objects(id=employee.id).only('age').get()
+        self.assertTrue(isinstance(obj, Employee))
+
+        # Check field names are looked up properly
+        obj = Employee.objects(id=employee.id).only('salary').get()
+        self.assertEqual(obj.salary, employee.salary)
+        self.assertEqual(obj.name, None)
+
+    def test_only_with_subfields(self):
+        class User(EmbeddedDocument):
+            name = StringField()
+            email = StringField()
+
+        class Comment(EmbeddedDocument):
+            title = StringField()
+            text = StringField()
+
+        class VariousData(EmbeddedDocument):
+            some = BooleanField()
+
+        class BlogPost(Document):
+            content = StringField()
+            author = EmbeddedDocumentField(User)
+            comments = ListField(EmbeddedDocumentField(Comment))
+            various = MapField(field=EmbeddedDocumentField(VariousData))
+
+        BlogPost.drop_collection()
+
+        post = BlogPost(content='Had a good coffee today...', various={'test_dynamic':{'some': True}})
+        post.author = User(name='Test User')
+        post.comments = [Comment(title='I aggree', text='Great post!'), Comment(title='Coffee', text='I hate coffee')]
+        post.save()
+
+        obj = BlogPost.objects.only('author.name',).get()
+        self.assertEqual(obj.content, None)
+        self.assertEqual(obj.author.email, None)
+        self.assertEqual(obj.author.name, 'Test User')
+        self.assertEqual(obj.comments, [])
+
+        obj = BlogPost.objects.only('various.test_dynamic.some').get()
+        self.assertEqual(obj.various["test_dynamic"].some, True)
+
+        obj = BlogPost.objects.only('content', 'comments.title',).get()
+        self.assertEqual(obj.content, 'Had a good coffee today...')
+        self.assertEqual(obj.author, None)
+        self.assertEqual(obj.comments[0].title, 'I aggree')
+        self.assertEqual(obj.comments[1].title, 'Coffee')
+        self.assertEqual(obj.comments[0].text, None)
+        self.assertEqual(obj.comments[1].text, None)
+
+        obj = BlogPost.objects.only('comments',).get()
+        self.assertEqual(obj.content, None)
+        self.assertEqual(obj.author, None)
+        self.assertEqual(obj.comments[0].title, 'I aggree')
+        self.assertEqual(obj.comments[1].title, 'Coffee')
+        self.assertEqual(obj.comments[0].text, 'Great post!')
+        self.assertEqual(obj.comments[1].text, 'I hate coffee')
+
+        BlogPost.drop_collection()
+
+    def test_exclude(self):
+        class User(EmbeddedDocument):
+            name = StringField()
+            email = StringField()
+
+        class Comment(EmbeddedDocument):
+            title = StringField()
+            text = StringField()
+
+        class BlogPost(Document):
+            content = StringField()
+            author = EmbeddedDocumentField(User)
+            comments = ListField(EmbeddedDocumentField(Comment))
+
+        BlogPost.drop_collection()
+
+        post = BlogPost(content='Had a good coffee today...')
+        post.author = User(name='Test User')
+        post.comments = [Comment(title='I aggree', text='Great post!'), Comment(title='Coffee', text='I hate coffee')]
+        post.save()
+
+        obj = BlogPost.objects.exclude('author', 'comments.text').get()
+        self.assertEqual(obj.author, None)
+        self.assertEqual(obj.content, 'Had a good coffee today...')
+        self.assertEqual(obj.comments[0].title, 'I aggree')
+        self.assertEqual(obj.comments[0].text, None)
+
+        BlogPost.drop_collection()
+
+    def test_exclude_only_combining(self):
+        class Attachment(EmbeddedDocument):
+            name = StringField()
+            content = StringField()
+
+        class Email(Document):
+            sender = StringField()
+            to = StringField()
+            subject = StringField()
+            body = StringField()
+            content_type = StringField()
+            attachments = ListField(EmbeddedDocumentField(Attachment))
+
+        Email.drop_collection()
+        email = Email(sender='me', to='you', subject='From Russia with Love', body='Hello!', content_type='text/plain')
+        email.attachments = [
+            Attachment(name='file1.doc', content='ABC'),
+            Attachment(name='file2.doc', content='XYZ'),
+        ]
+        email.save()
+
+        obj = Email.objects.exclude('content_type').exclude('body').get()
+        self.assertEqual(obj.sender, 'me')
+        self.assertEqual(obj.to, 'you')
+        self.assertEqual(obj.subject, 'From Russia with Love')
+        self.assertEqual(obj.body, None)
+        self.assertEqual(obj.content_type, None)
+
+        obj = Email.objects.only('sender', 'to').exclude('body', 'sender').get()
+        self.assertEqual(obj.sender, None)
+        self.assertEqual(obj.to, 'you')
+        self.assertEqual(obj.subject, None)
+        self.assertEqual(obj.body, None)
+        self.assertEqual(obj.content_type, None)
+
+        obj = Email.objects.exclude('attachments.content').exclude('body').only('to', 'attachments.name').get()
+        self.assertEqual(obj.attachments[0].name, 'file1.doc')
+        self.assertEqual(obj.attachments[0].content, None)
+        self.assertEqual(obj.sender, None)
+        self.assertEqual(obj.to, 'you')
+        self.assertEqual(obj.subject, None)
+        self.assertEqual(obj.body, None)
+        self.assertEqual(obj.content_type, None)
+
+        Email.drop_collection()
+
+    def test_all_fields(self):
+
+        class Email(Document):
+            sender = StringField()
+            to = StringField()
+            subject = StringField()
+            body = StringField()
+            content_type = StringField()
+
+        Email.drop_collection()
+
+        email = Email(sender='me', to='you', subject='From Russia with Love', body='Hello!', content_type='text/plain')
+        email.save()
+
+        obj = Email.objects.exclude('content_type', 'body').only('to', 'body').all_fields().get()
+        self.assertEqual(obj.sender, 'me')
+        self.assertEqual(obj.to, 'you')
+        self.assertEqual(obj.subject, 'From Russia with Love')
+        self.assertEqual(obj.body, 'Hello!')
+        self.assertEqual(obj.content_type, 'text/plain')
+
+        Email.drop_collection()
+
+    def test_slicing_fields(self):
+        """Ensure that query slicing an array works.
+        """
+        class Numbers(Document):
+            n = ListField(IntField())
+
+        Numbers.drop_collection()
+
+        numbers = Numbers(n=[0, 1, 2, 3, 4, 5, -5, -4, -3, -2, -1])
+        numbers.save()
+
+        # first three
+        numbers = Numbers.objects.fields(slice__n=3).get()
+        self.assertEqual(numbers.n, [0, 1, 2])
+
+        # last three
+        numbers = Numbers.objects.fields(slice__n=-3).get()
+        self.assertEqual(numbers.n, [-3, -2, -1])
+
+        # skip 2, limit 3
+        numbers = Numbers.objects.fields(slice__n=[2, 3]).get()
+        self.assertEqual(numbers.n, [2, 3, 4])
+
+        # skip to fifth from last, limit 4
+        numbers = Numbers.objects.fields(slice__n=[-5, 4]).get()
+        self.assertEqual(numbers.n, [-5, -4, -3, -2])
+
+        # skip to fifth from last, limit 10
+        numbers = Numbers.objects.fields(slice__n=[-5, 10]).get()
+        self.assertEqual(numbers.n, [-5, -4, -3, -2, -1])
+
+        # skip to fifth from last, limit 10 dict method
+        numbers = Numbers.objects.fields(n={"$slice": [-5, 10]}).get()
+        self.assertEqual(numbers.n, [-5, -4, -3, -2, -1])
+
+    def test_slicing_nested_fields(self):
+        """Ensure that query slicing an embedded array works.
+        """
+
+        class EmbeddedNumber(EmbeddedDocument):
+            n = ListField(IntField())
+
+        class Numbers(Document):
+            embedded = EmbeddedDocumentField(EmbeddedNumber)
+
+        Numbers.drop_collection()
+
+        numbers = Numbers()
+        numbers.embedded = EmbeddedNumber(n=[0, 1, 2, 3, 4, 5, -5, -4, -3, -2, -1])
+        numbers.save()
+
+        # first three
+        numbers = Numbers.objects.fields(slice__embedded__n=3).get()
+        self.assertEqual(numbers.embedded.n, [0, 1, 2])
+
+        # last three
+        numbers = Numbers.objects.fields(slice__embedded__n=-3).get()
+        self.assertEqual(numbers.embedded.n, [-3, -2, -1])
+
+        # skip 2, limit 3
+        numbers = Numbers.objects.fields(slice__embedded__n=[2, 3]).get()
+        self.assertEqual(numbers.embedded.n, [2, 3, 4])
+
+        # skip to fifth from last, limit 4
+        numbers = Numbers.objects.fields(slice__embedded__n=[-5, 4]).get()
+        self.assertEqual(numbers.embedded.n, [-5, -4, -3, -2])
+
+        # skip to fifth from last, limit 10
+        numbers = Numbers.objects.fields(slice__embedded__n=[-5, 10]).get()
+        self.assertEqual(numbers.embedded.n, [-5, -4, -3, -2, -1])
+
+        # skip to fifth from last, limit 10 dict method
+        numbers = Numbers.objects.fields(embedded__n={"$slice": [-5, 10]}).get()
+        self.assertEqual(numbers.embedded.n, [-5, -4, -3, -2, -1])
+
+
+    def test_exclude_from_subclasses_docs(self):
+
+        class Base(Document):
+            username = StringField()
+
+            meta = {'allow_inheritance': True}
+
+        class Anon(Base):
+            anon = BooleanField()
+
+        class User(Base):
+            password = StringField()
+            wibble = StringField()
+
+        Base.drop_collection()
+        User(username="mongodb", password="secret").save()
+
+        user = Base.objects().exclude("password", "wibble").first()
+        self.assertEqual(user.password, None)
+
+        self.assertRaises(LookUpError, Base.objects.exclude, "made_up")
+
+if __name__ == '__main__':
+    unittest.main()

tests/queryset/geo.py

@@ -0,0 +1,575 @@
+import datetime
+import unittest
+
+from mongoengine import *
+
+from tests.utils import MongoDBTestCase, needs_mongodb_v3
+
+
+__all__ = ("GeoQueriesTest",)
+
+
+class GeoQueriesTest(MongoDBTestCase):
+
+    def _create_event_data(self, point_field_class=GeoPointField):
+        """Create some sample data re-used in many of the tests below."""
+        class Event(Document):
+            title = StringField()
+            date = DateTimeField()
+            location = point_field_class()
+
+            def __unicode__(self):
+                return self.title
+
+        self.Event = Event
+
+        Event.drop_collection()
+
+        event1 = Event.objects.create(
+            title="Coltrane Motion @ Double Door",
+            date=datetime.datetime.now() - datetime.timedelta(days=1),
+            location=[-87.677137, 41.909889])
+        event2 = Event.objects.create(
+            title="Coltrane Motion @ Bottom of the Hill",
+            date=datetime.datetime.now() - datetime.timedelta(days=10),
+            location=[-122.4194155, 37.7749295])
+        event3 = Event.objects.create(
+            title="Coltrane Motion @ Empty Bottle",
+            date=datetime.datetime.now(),
+            location=[-87.686638, 41.900474])
+
+        return event1, event2, event3
+
+    def test_near(self):
+        """Make sure the "near" operator works."""
+        event1, event2, event3 = self._create_event_data()
+
+        # find all events "near" pitchfork office, chicago.
+        # note that "near" will show the san francisco event, too,
+        # although it sorts to last.
+        events = self.Event.objects(location__near=[-87.67892, 41.9120459])
+        self.assertEqual(events.count(), 3)
+        self.assertEqual(list(events), [event1, event3, event2])
+
+        # ensure ordering is respected by "near"
+        events = self.Event.objects(location__near=[-87.67892, 41.9120459])
+        events = events.order_by("-date")
+        self.assertEqual(events.count(), 3)
+        self.assertEqual(list(events), [event3, event1, event2])
+
+    def test_near_and_max_distance(self):
+        """Ensure the "max_distance" operator works alongside the "near"
+        operator.
+        """
+        event1, event2, event3 = self._create_event_data()
+
+        # find events within 10 degrees of san francisco
+        point = [-122.415579, 37.7566023]
+        events = self.Event.objects(location__near=point,
+                                    location__max_distance=10)
+        self.assertEqual(events.count(), 1)
+        self.assertEqual(events[0], event2)
+
+    # $minDistance was added in MongoDB v2.6, but continued being buggy
+    # until v3.0; skip for older versions
+    @needs_mongodb_v3
+    def test_near_and_min_distance(self):
+        """Ensure the "min_distance" operator works alongside the "near"
+        operator.
+        """
+        event1, event2, event3 = self._create_event_data()
+
+        # find events at least 10 degrees away of san francisco
+        point = [-122.415579, 37.7566023]
+        events = self.Event.objects(location__near=point,
+                                    location__min_distance=10)
+        self.assertEqual(events.count(), 2)
+
+    def test_within_distance(self):
+        """Make sure the "within_distance" operator works."""
+        event1, event2, event3 = self._create_event_data()
+
+        # find events within 5 degrees of pitchfork office, chicago
+        point_and_distance = [[-87.67892, 41.9120459], 5]
+        events = self.Event.objects(
+            location__within_distance=point_and_distance)
+        self.assertEqual(events.count(), 2)
+        events = list(events)
+        self.assertTrue(event2 not in events)
+        self.assertTrue(event1 in events)
+        self.assertTrue(event3 in events)
+
+        # find events within 10 degrees of san francisco
+        point_and_distance = [[-122.415579, 37.7566023], 10]
+        events = self.Event.objects(
+            location__within_distance=point_and_distance)
+        self.assertEqual(events.count(), 1)
+        self.assertEqual(events[0], event2)
+
+        # find events within 1 degree of greenpoint, broolyn, nyc, ny
+        point_and_distance = [[-73.9509714, 40.7237134], 1]
+        events = self.Event.objects(
+            location__within_distance=point_and_distance)
+        self.assertEqual(events.count(), 0)
+
+        # ensure ordering is respected by "within_distance"
+        point_and_distance = [[-87.67892, 41.9120459], 10]
+        events = self.Event.objects(
+            location__within_distance=point_and_distance)
+        events = events.order_by("-date")
+        self.assertEqual(events.count(), 2)
+        self.assertEqual(events[0], event3)
+
+    def test_within_box(self):
+        """Ensure the "within_box" operator works."""
+        event1, event2, event3 = self._create_event_data()
+
+        # check that within_box works
+        box = [(-125.0, 35.0), (-100.0, 40.0)]
+        events = self.Event.objects(location__within_box=box)
+        self.assertEqual(events.count(), 1)
+        self.assertEqual(events[0].id, event2.id)
+
+    def test_within_polygon(self):
+        """Ensure the "within_polygon" operator works."""
+        event1, event2, event3 = self._create_event_data()
+
+        polygon = [
+            (-87.694445, 41.912114),
+            (-87.69084, 41.919395),
+            (-87.681742, 41.927186),
+            (-87.654276, 41.911731),
+            (-87.656164, 41.898061),
+        ]
+        events = self.Event.objects(location__within_polygon=polygon)
+        self.assertEqual(events.count(), 1)
+        self.assertEqual(events[0].id, event1.id)
+
+        polygon2 = [
+            (-1.742249, 54.033586),
+            (-1.225891, 52.792797),
+            (-4.40094, 53.389881)
+        ]
+        events = self.Event.objects(location__within_polygon=polygon2)
+        self.assertEqual(events.count(), 0)
+
+    def test_2dsphere_near(self):
+        """Make sure the "near" operator works with a PointField, which
+        corresponds to a 2dsphere index.
+        """
+        event1, event2, event3 = self._create_event_data(
+            point_field_class=PointField
+        )
+
+        # find all events "near" pitchfork office, chicago.
+        # note that "near" will show the san francisco event, too,
+        # although it sorts to last.
+        events = self.Event.objects(location__near=[-87.67892, 41.9120459])
+        self.assertEqual(events.count(), 3)
+        self.assertEqual(list(events), [event1, event3, event2])
+
+        # ensure ordering is respected by "near"
+        events = self.Event.objects(location__near=[-87.67892, 41.9120459])
+        events = events.order_by("-date")
+        self.assertEqual(events.count(), 3)
+        self.assertEqual(list(events), [event3, event1, event2])
+
+    def test_2dsphere_near_and_max_distance(self):
+        """Ensure the "max_distance" operator works alongside the "near"
+        operator with a 2dsphere index.
+        """
+        event1, event2, event3 = self._create_event_data(
+            point_field_class=PointField
+        )
+
+        # find events within 10km of san francisco
+        point = [-122.415579, 37.7566023]
+        events = self.Event.objects(location__near=point,
+                                    location__max_distance=10000)
+        self.assertEqual(events.count(), 1)
+        self.assertEqual(events[0], event2)
+
+        # find events within 1km of greenpoint, broolyn, nyc, ny
+        events = self.Event.objects(location__near=[-73.9509714, 40.7237134],
+                                    location__max_distance=1000)
+        self.assertEqual(events.count(), 0)
+
+        # ensure ordering is respected by "near"
+        events = self.Event.objects(
+            location__near=[-87.67892, 41.9120459],
+            location__max_distance=10000
+        ).order_by("-date")
+        self.assertEqual(events.count(), 2)
+        self.assertEqual(events[0], event3)
+
+    def test_2dsphere_geo_within_box(self):
+        """Ensure the "geo_within_box" operator works with a 2dsphere
+        index.
+        """
+        event1, event2, event3 = self._create_event_data(
+            point_field_class=PointField
+        )
+
+        # check that within_box works
+        box = [(-125.0, 35.0), (-100.0, 40.0)]
+        events = self.Event.objects(location__geo_within_box=box)
+        self.assertEqual(events.count(), 1)
+        self.assertEqual(events[0].id, event2.id)
+
+    def test_2dsphere_geo_within_polygon(self):
+        """Ensure the "geo_within_polygon" operator works with a
+        2dsphere index.
+        """
+        event1, event2, event3 = self._create_event_data(
+            point_field_class=PointField
+        )
+
+        polygon = [
+            (-87.694445, 41.912114),
+            (-87.69084, 41.919395),
+            (-87.681742, 41.927186),
+            (-87.654276, 41.911731),
+            (-87.656164, 41.898061),
+        ]
+        events = self.Event.objects(location__geo_within_polygon=polygon)
+        self.assertEqual(events.count(), 1)
+        self.assertEqual(events[0].id, event1.id)
+
+        polygon2 = [
+            (-1.742249, 54.033586),
+            (-1.225891, 52.792797),
+            (-4.40094, 53.389881)
+        ]
+        events = self.Event.objects(location__geo_within_polygon=polygon2)
+        self.assertEqual(events.count(), 0)
+
+    # $minDistance was added in MongoDB v2.6, but continued being buggy
+    # until v3.0; skip for older versions
+    @needs_mongodb_v3
+    def test_2dsphere_near_and_min_max_distance(self):
+        """Ensure "min_distace" and "max_distance" operators work well
+        together with the "near" operator in a 2dsphere index.
+        """
+        event1, event2, event3 = self._create_event_data(
+            point_field_class=PointField
+        )
+
+        # ensure min_distance and max_distance combine well
+        events = self.Event.objects(
+            location__near=[-87.67892, 41.9120459],
+            location__min_distance=1000,
+            location__max_distance=10000
+        ).order_by("-date")
+        self.assertEqual(events.count(), 1)
+        self.assertEqual(events[0], event3)
+
+        # ensure ordering is respected by "near" with "min_distance"
+        events = self.Event.objects(
+            location__near=[-87.67892, 41.9120459],
+            location__min_distance=10000
+        ).order_by("-date")
+        self.assertEqual(events.count(), 1)
+        self.assertEqual(events[0], event2)
+
+    def test_2dsphere_geo_within_center(self):
+        """Make sure the "geo_within_center" operator works with a
+        2dsphere index.
+        """
+        event1, event2, event3 = self._create_event_data(
+            point_field_class=PointField
+        )
+
+        # find events within 5 degrees of pitchfork office, chicago
+        point_and_distance = [[-87.67892, 41.9120459], 2]
+        events = self.Event.objects(
+            location__geo_within_center=point_and_distance)
+        self.assertEqual(events.count(), 2)
+        events = list(events)
+        self.assertTrue(event2 not in events)
+        self.assertTrue(event1 in events)
+        self.assertTrue(event3 in events)
+
+    def _test_embedded(self, point_field_class):
+        """Helper test method ensuring given point field class works
+        well in an embedded document.
+        """
+        class Venue(EmbeddedDocument):
+            location = point_field_class()
+            name = StringField()
+
+        class Event(Document):
+            title = StringField()
+            venue = EmbeddedDocumentField(Venue)
+
+        Event.drop_collection()
+
+        venue1 = Venue(name="The Rock", location=[-87.677137, 41.909889])
+        venue2 = Venue(name="The Bridge", location=[-122.4194155, 37.7749295])
+
+        event1 = Event(title="Coltrane Motion @ Double Door",
+                       venue=venue1).save()
+        event2 = Event(title="Coltrane Motion @ Bottom of the Hill",
+                       venue=venue2).save()
+        event3 = Event(title="Coltrane Motion @ Empty Bottle",
+                       venue=venue1).save()
+
+        # find all events "near" pitchfork office, chicago.
+        # note that "near" will show the san francisco event, too,
+        # although it sorts to last.
+        events = Event.objects(venue__location__near=[-87.67892, 41.9120459])
+        self.assertEqual(events.count(), 3)
+        self.assertEqual(list(events), [event1, event3, event2])
+
+    def test_geo_spatial_embedded(self):
+        """Make sure GeoPointField works properly in an embedded document."""
+        self._test_embedded(point_field_class=GeoPointField)
+
+    def test_2dsphere_point_embedded(self):
+        """Make sure PointField works properly in an embedded document."""
+        self._test_embedded(point_field_class=PointField)
+
+    # Needs MongoDB > 2.6.4 https://jira.mongodb.org/browse/SERVER-14039
+    @needs_mongodb_v3
+    def test_spherical_geospatial_operators(self):
+        """Ensure that spherical geospatial queries are working."""
+        class Point(Document):
+            location = GeoPointField()
+
+        Point.drop_collection()
+
+        # These points are one degree apart, which (according to Google Maps)
+        # is about 110 km apart at this place on the Earth.
+        north_point = Point(location=[-122, 38]).save()  # Near Concord, CA
+        south_point = Point(location=[-122, 37]).save()  # Near Santa Cruz, CA
+
+        earth_radius = 6378.009  # in km (needs to be a float for dividing by)
+
+        # Finds both points because they are within 60 km of the reference
+        # point equidistant between them.
+        points = Point.objects(location__near_sphere=[-122, 37.5])
+        self.assertEqual(points.count(), 2)
+
+        # Same behavior for _within_spherical_distance
+        points = Point.objects(
+            location__within_spherical_distance=[
+                [-122, 37.5],
+                60 / earth_radius
+            ]
+        )
+        self.assertEqual(points.count(), 2)
+
+        points = Point.objects(location__near_sphere=[-122, 37.5],
+                               location__max_distance=60 / earth_radius)
+        self.assertEqual(points.count(), 2)
+
+        # Test query works with max_distance, being farer from one point
+        points = Point.objects(location__near_sphere=[-122, 37.8],
+                               location__max_distance=60 / earth_radius)
+        close_point = points.first()
+        self.assertEqual(points.count(), 1)
+
+        # Test query works with min_distance, being farer from one point
+        points = Point.objects(location__near_sphere=[-122, 37.8],
+                               location__min_distance=60 / earth_radius)
+        self.assertEqual(points.count(), 1)
+        far_point = points.first()
+        self.assertNotEqual(close_point, far_point)
+
+        # Finds both points, but orders the north point first because it's
+        # closer to the reference point to the north.
+        points = Point.objects(location__near_sphere=[-122, 38.5])
+        self.assertEqual(points.count(), 2)
+        self.assertEqual(points[0].id, north_point.id)
+        self.assertEqual(points[1].id, south_point.id)
+
+        # Finds both points, but orders the south point first because it's
+        # closer to the reference point to the south.
+        points = Point.objects(location__near_sphere=[-122, 36.5])
+        self.assertEqual(points.count(), 2)
+        self.assertEqual(points[0].id, south_point.id)
+        self.assertEqual(points[1].id, north_point.id)
+
+        # Finds only one point because only the first point is within 60km of
+        # the reference point to the south.
+        points = Point.objects(
+            location__within_spherical_distance=[
+                [-122, 36.5],
+                60 / earth_radius
+            ]
+        )
+        self.assertEqual(points.count(), 1)
+        self.assertEqual(points[0].id, south_point.id)
+
+    def test_linestring(self):
+        class Road(Document):
+            name = StringField()
+            line = LineStringField()
+
+        Road.drop_collection()
+
+        Road(name="66", line=[[40, 5], [41, 6]]).save()
+
+        # near
+        point = {"type": "Point", "coordinates": [40, 5]}
+        roads = Road.objects.filter(line__near=point["coordinates"]).count()
+        self.assertEqual(1, roads)
+
+        roads = Road.objects.filter(line__near=point).count()
+        self.assertEqual(1, roads)
+
+        roads = Road.objects.filter(line__near={"$geometry": point}).count()
+        self.assertEqual(1, roads)
+
+        # Within
+        polygon = {"type": "Polygon",
+                   "coordinates": [[[40, 5], [40, 6], [41, 6], [41, 5], [40, 5]]]}
+        roads = Road.objects.filter(line__geo_within=polygon["coordinates"]).count()
+        self.assertEqual(1, roads)
+
+        roads = Road.objects.filter(line__geo_within=polygon).count()
+        self.assertEqual(1, roads)
+
+        roads = Road.objects.filter(line__geo_within={"$geometry": polygon}).count()
+        self.assertEqual(1, roads)
+
+        # Intersects
+        line = {"type": "LineString",
+                "coordinates": [[40, 5], [40, 6]]}
+        roads = Road.objects.filter(line__geo_intersects=line["coordinates"]).count()
+        self.assertEqual(1, roads)
+
+        roads = Road.objects.filter(line__geo_intersects=line).count()
+        self.assertEqual(1, roads)
+
+        roads = Road.objects.filter(line__geo_intersects={"$geometry": line}).count()
+        self.assertEqual(1, roads)
+
+        polygon = {"type": "Polygon",
+                   "coordinates": [[[40, 5], [40, 6], [41, 6], [41, 5], [40, 5]]]}
+        roads = Road.objects.filter(line__geo_intersects=polygon["coordinates"]).count()
+        self.assertEqual(1, roads)
+
+        roads = Road.objects.filter(line__geo_intersects=polygon).count()
+        self.assertEqual(1, roads)
+
+        roads = Road.objects.filter(line__geo_intersects={"$geometry": polygon}).count()
+        self.assertEqual(1, roads)
+
+    def test_polygon(self):
+        class Road(Document):
+            name = StringField()
+            poly = PolygonField()
+
+        Road.drop_collection()
+
+        Road(name="66", poly=[[[40, 5], [40, 6], [41, 6], [40, 5]]]).save()
+
+        # near
+        point = {"type": "Point", "coordinates": [40, 5]}
+        roads = Road.objects.filter(poly__near=point["coordinates"]).count()
+        self.assertEqual(1, roads)
+
+        roads = Road.objects.filter(poly__near=point).count()
+        self.assertEqual(1, roads)
+
+        roads = Road.objects.filter(poly__near={"$geometry": point}).count()
+        self.assertEqual(1, roads)
+
+        # Within
+        polygon = {"type": "Polygon",
+                   "coordinates": [[[40, 5], [40, 6], [41, 6], [41, 5], [40, 5]]]}
+        roads = Road.objects.filter(poly__geo_within=polygon["coordinates"]).count()
+        self.assertEqual(1, roads)
+
+        roads = Road.objects.filter(poly__geo_within=polygon).count()
+        self.assertEqual(1, roads)
+
+        roads = Road.objects.filter(poly__geo_within={"$geometry": polygon}).count()
+        self.assertEqual(1, roads)
+
+        # Intersects
+        line = {"type": "LineString",
+                "coordinates": [[40, 5], [41, 6]]}
+        roads = Road.objects.filter(poly__geo_intersects=line["coordinates"]).count()
+        self.assertEqual(1, roads)
+
+        roads = Road.objects.filter(poly__geo_intersects=line).count()
+        self.assertEqual(1, roads)
+
+        roads = Road.objects.filter(poly__geo_intersects={"$geometry": line}).count()
+        self.assertEqual(1, roads)
+
+        polygon = {"type": "Polygon",
+                   "coordinates": [[[40, 5], [40, 6], [41, 6], [41, 5], [40, 5]]]}
+        roads = Road.objects.filter(poly__geo_intersects=polygon["coordinates"]).count()
+        self.assertEqual(1, roads)
+
+        roads = Road.objects.filter(poly__geo_intersects=polygon).count()
+        self.assertEqual(1, roads)
+
+        roads = Road.objects.filter(poly__geo_intersects={"$geometry": polygon}).count()
+        self.assertEqual(1, roads)
+
+    def test_aspymongo_with_only(self):
+        """Ensure as_pymongo works with only"""
+        class Place(Document):
+            location = PointField()
+
+        Place.drop_collection()
+        p = Place(location=[24.946861267089844, 60.16311983618494])
+        p.save()
+        qs = Place.objects().only('location')
+        self.assertDictEqual(
+            qs.as_pymongo()[0]['location'],
+            {u'type': u'Point',
+             u'coordinates': [
+                24.946861267089844,
+                60.16311983618494]
+            }
+        )
+
+    def test_2dsphere_point_sets_correctly(self):
+        class Location(Document):
+            loc = PointField()
+
+        Location.drop_collection()
+
+        Location(loc=[1,2]).save()
+        loc = Location.objects.as_pymongo()[0]
+        self.assertEqual(loc["loc"], {"type": "Point", "coordinates": [1, 2]})
+
+        Location.objects.update(set__loc=[2,1])
+        loc = Location.objects.as_pymongo()[0]
+        self.assertEqual(loc["loc"], {"type": "Point", "coordinates": [2, 1]})
+
+    def test_2dsphere_linestring_sets_correctly(self):
+        class Location(Document):
+            line = LineStringField()
+
+        Location.drop_collection()
+
+        Location(line=[[1, 2], [2, 2]]).save()
+        loc = Location.objects.as_pymongo()[0]
+        self.assertEqual(loc["line"], {"type": "LineString", "coordinates": [[1, 2], [2, 2]]})
+
+        Location.objects.update(set__line=[[2, 1], [1, 2]])
+        loc = Location.objects.as_pymongo()[0]
+        self.assertEqual(loc["line"], {"type": "LineString", "coordinates": [[2, 1], [1, 2]]})
+
+    def test_geojson_PolygonField(self):
+        class Location(Document):
+            poly = PolygonField()
+
+        Location.drop_collection()
+
+        Location(poly=[[[40, 5], [40, 6], [41, 6], [40, 5]]]).save()
+        loc = Location.objects.as_pymongo()[0]
+        self.assertEqual(loc["poly"], {"type": "Polygon", "coordinates": [[[40, 5], [40, 6], [41, 6], [40, 5]]]})
+
+        Location.objects.update(set__poly=[[[40, 4], [40, 6], [41, 6], [40, 4]]])
+        loc = Location.objects.as_pymongo()[0]
+        self.assertEqual(loc["poly"], {"type": "Polygon", "coordinates": [[[40, 4], [40, 6], [41, 6], [40, 4]]]})
+
+
+if __name__ == '__main__':
+    unittest.main()

tests/queryset/modify.py

@@ -0,0 +1,132 @@
+import unittest
+
+from mongoengine import connect, Document, IntField, StringField, ListField
+
+from tests.utils import needs_mongodb_v26
+
+__all__ = ("FindAndModifyTest",)
+
+
+class Doc(Document):
+    id = IntField(primary_key=True)
+    value = IntField()
+
+
+class FindAndModifyTest(unittest.TestCase):
+
+    def setUp(self):
+        connect(db="mongoenginetest")
+        Doc.drop_collection()
+
+    def assertDbEqual(self, docs):
+        self.assertEqual(list(Doc._collection.find().sort("id")), docs)
+
+    def test_modify(self):
+        Doc(id=0, value=0).save()
+        doc = Doc(id=1, value=1).save()
+
+        old_doc = Doc.objects(id=1).modify(set__value=-1)
+        self.assertEqual(old_doc.to_json(), doc.to_json())
+        self.assertDbEqual([{"_id": 0, "value": 0}, {"_id": 1, "value": -1}])
+
+    def test_modify_with_new(self):
+        Doc(id=0, value=0).save()
+        doc = Doc(id=1, value=1).save()
+
+        new_doc = Doc.objects(id=1).modify(set__value=-1, new=True)
+        doc.value = -1
+        self.assertEqual(new_doc.to_json(), doc.to_json())
+        self.assertDbEqual([{"_id": 0, "value": 0}, {"_id": 1, "value": -1}])
+
+    def test_modify_not_existing(self):
+        Doc(id=0, value=0).save()
+        self.assertEqual(Doc.objects(id=1).modify(set__value=-1), None)
+        self.assertDbEqual([{"_id": 0, "value": 0}])
+
+    def test_modify_with_upsert(self):
+        Doc(id=0, value=0).save()
+        old_doc = Doc.objects(id=1).modify(set__value=1, upsert=True)
+        self.assertEqual(old_doc, None)
+        self.assertDbEqual([{"_id": 0, "value": 0}, {"_id": 1, "value": 1}])
+
+    def test_modify_with_upsert_existing(self):
+        Doc(id=0, value=0).save()
+        doc = Doc(id=1, value=1).save()
+
+        old_doc = Doc.objects(id=1).modify(set__value=-1, upsert=True)
+        self.assertEqual(old_doc.to_json(), doc.to_json())
+        self.assertDbEqual([{"_id": 0, "value": 0}, {"_id": 1, "value": -1}])
+
+    def test_modify_with_upsert_with_new(self):
+        Doc(id=0, value=0).save()
+        new_doc = Doc.objects(id=1).modify(upsert=True, new=True, set__value=1)
+        self.assertEqual(new_doc.to_mongo(), {"_id": 1, "value": 1})
+        self.assertDbEqual([{"_id": 0, "value": 0}, {"_id": 1, "value": 1}])
+
+    def test_modify_with_remove(self):
+        Doc(id=0, value=0).save()
+        doc = Doc(id=1, value=1).save()
+
+        old_doc = Doc.objects(id=1).modify(remove=True)
+        self.assertEqual(old_doc.to_json(), doc.to_json())
+        self.assertDbEqual([{"_id": 0, "value": 0}])
+
+    def test_find_and_modify_with_remove_not_existing(self):
+        Doc(id=0, value=0).save()
+        self.assertEqual(Doc.objects(id=1).modify(remove=True), None)
+        self.assertDbEqual([{"_id": 0, "value": 0}])
+
+    def test_modify_with_order_by(self):
+        Doc(id=0, value=3).save()
+        Doc(id=1, value=2).save()
+        Doc(id=2, value=1).save()
+        doc = Doc(id=3, value=0).save()
+
+        old_doc = Doc.objects().order_by("-id").modify(set__value=-1)
+        self.assertEqual(old_doc.to_json(), doc.to_json())
+        self.assertDbEqual([
+            {"_id": 0, "value": 3}, {"_id": 1, "value": 2},
+            {"_id": 2, "value": 1}, {"_id": 3, "value": -1}])
+
+    def test_modify_with_fields(self):
+        Doc(id=0, value=0).save()
+        Doc(id=1, value=1).save()
+
+        old_doc = Doc.objects(id=1).only("id").modify(set__value=-1)
+        self.assertEqual(old_doc.to_mongo(), {"_id": 1})
+        self.assertDbEqual([{"_id": 0, "value": 0}, {"_id": 1, "value": -1}])
+
+    @needs_mongodb_v26
+    def test_modify_with_push(self):
+        class BlogPost(Document):
+            tags = ListField(StringField())
+
+        BlogPost.drop_collection()
+
+        blog = BlogPost.objects.create()
+
+        # Push a new tag via modify with new=False (default).
+        BlogPost(id=blog.id).modify(push__tags='code')
+        self.assertEqual(blog.tags, [])
+        blog.reload()
+        self.assertEqual(blog.tags, ['code'])
+
+        # Push a new tag via modify with new=True.
+        blog = BlogPost.objects(id=blog.id).modify(push__tags='java', new=True)
+        self.assertEqual(blog.tags, ['code', 'java'])
+
+        # Push a new tag with a positional argument.
+        blog = BlogPost.objects(id=blog.id).modify(
+            push__tags__0='python',
+            new=True)
+        self.assertEqual(blog.tags, ['python', 'code', 'java'])
+
+        # Push multiple new tags with a positional argument.
+        blog = BlogPost.objects(id=blog.id).modify(
+            push__tags__1=['go', 'rust'],
+            new=True)
+        self.assertEqual(blog.tags, ['python', 'go', 'rust', 'code', 'java'])
+
+
+if __name__ == '__main__':
+    unittest.main()

tests/queryset/pickable.py

@@ -0,0 +1,78 @@
+import pickle
+import unittest
+from pymongo.mongo_client import MongoClient
+from mongoengine import Document, StringField, IntField
+from mongoengine.connection import connect
+
+__author__ = 'stas'
+
+class Person(Document):
+    name = StringField()
+    age = IntField()
+
+class TestQuerysetPickable(unittest.TestCase):
+    """
+    Test for adding pickling support for QuerySet instances
+    See issue https://github.com/MongoEngine/mongoengine/issues/442
+    """
+    def setUp(self):
+        super(TestQuerysetPickable, self).setUp()
+
+        connection = connect(db="test") #type: pymongo.mongo_client.MongoClient
+
+        connection.drop_database("test")
+
+        self.john = Person.objects.create(
+            name="John",
+            age=21
+        )
+
+
+    def test_picke_simple_qs(self):
+
+        qs = Person.objects.all()
+
+        pickle.dumps(qs)
+
+    def _get_loaded(self, qs):
+        s = pickle.dumps(qs)
+
+        return pickle.loads(s)
+
+    def test_unpickle(self):
+        qs = Person.objects.all()
+
+        loadedQs = self._get_loaded(qs)
+
+        self.assertEqual(qs.count(), loadedQs.count())
+
+        #can update loadedQs
+        loadedQs.update(age=23)
+
+        #check
+        self.assertEqual(Person.objects.first().age, 23)
+
+    def test_pickle_support_filtration(self):
+        Person.objects.create(
+            name="Alice",
+            age=22
+        )
+
+        Person.objects.create(
+            name="Bob",
+            age=23
+        )
+
+        qs = Person.objects.filter(age__gte=22)
+        self.assertEqual(qs.count(), 2)
+
+        loaded = self._get_loaded(qs)
+
+        self.assertEqual(loaded.count(), 2)
+        self.assertEqual(loaded.filter(name="Bob").first().age, 23)
+    
+
+
+
+
+

tests/queryset/transform.py

@@ -0,0 +1,290 @@
+import unittest
+
+from bson.son import SON
+
+from mongoengine import *
+from mongoengine.queryset import Q, transform
+
+__all__ = ("TransformTest",)
+
+
+class TransformTest(unittest.TestCase):
+
+    def setUp(self):
+        connect(db='mongoenginetest')
+
+    def test_transform_query(self):
+        """Ensure that the _transform_query function operates correctly.
+        """
+        self.assertEqual(transform.query(name='test', age=30),
+                         {'name': 'test', 'age': 30})
+        self.assertEqual(transform.query(age__lt=30),
+                         {'age': {'$lt': 30}})
+        self.assertEqual(transform.query(age__gt=20, age__lt=50),
+                         {'age': {'$gt': 20, '$lt': 50}})
+        self.assertEqual(transform.query(age=20, age__gt=50),
+                         {'$and': [{'age': {'$gt': 50}}, {'age': 20}]})
+        self.assertEqual(transform.query(friend__age__gte=30),
+                         {'friend.age': {'$gte': 30}})
+        self.assertEqual(transform.query(name__exists=True),
+                         {'name': {'$exists': True}})
+
+    def test_transform_update(self):
+        class LisDoc(Document):
+            foo = ListField(StringField())
+
+        class DicDoc(Document):
+            dictField = DictField()
+
+        class Doc(Document):
+            pass
+
+        LisDoc.drop_collection()
+        DicDoc.drop_collection()
+        Doc.drop_collection()
+
+        DicDoc().save()
+        doc = Doc().save()
+
+        for k, v in (("set", "$set"), ("set_on_insert", "$setOnInsert"), ("push", "$push")):
+            update = transform.update(DicDoc, **{"%s__dictField__test" % k: doc})
+            self.assertTrue(isinstance(update[v]["dictField.test"], dict))
+
+        # Update special cases
+        update = transform.update(DicDoc, unset__dictField__test=doc)
+        self.assertEqual(update["$unset"]["dictField.test"], 1)
+
+        update = transform.update(DicDoc, pull__dictField__test=doc)
+        self.assertTrue(isinstance(update["$pull"]["dictField"]["test"], dict))
+        
+        update = transform.update(LisDoc, pull__foo__in=['a'])
+        self.assertEqual(update, {'$pull': {'foo': {'$in': ['a']}}})
+
+    def test_transform_update_push(self):
+        """Ensure the differences in behvaior between 'push' and 'push_all'"""
+        class BlogPost(Document):
+            tags = ListField(StringField())
+
+        update = transform.update(BlogPost, push__tags=['mongo', 'db'])
+        self.assertEqual(update, {'$push': {'tags': ['mongo', 'db']}})
+
+        update = transform.update(BlogPost, push_all__tags=['mongo', 'db'])
+        self.assertEqual(update, {'$push': {'tags': {'$each': ['mongo', 'db']}}})
+
+    def test_query_field_name(self):
+        """Ensure that the correct field name is used when querying.
+        """
+        class Comment(EmbeddedDocument):
+            content = StringField(db_field='commentContent')
+
+        class BlogPost(Document):
+            title = StringField(db_field='postTitle')
+            comments = ListField(EmbeddedDocumentField(Comment),
+                                 db_field='postComments')
+
+        BlogPost.drop_collection()
+
+        data = {'title': 'Post 1', 'comments': [Comment(content='test')]}
+        post = BlogPost(**data)
+        post.save()
+
+        self.assertTrue('postTitle' in
+                        BlogPost.objects(title=data['title'])._query)
+        self.assertFalse('title' in
+                         BlogPost.objects(title=data['title'])._query)
+        self.assertEqual(BlogPost.objects(title=data['title']).count(), 1)
+
+        self.assertTrue('_id' in BlogPost.objects(pk=post.id)._query)
+        self.assertEqual(BlogPost.objects(pk=post.id).count(), 1)
+
+        self.assertTrue('postComments.commentContent' in
+                        BlogPost.objects(comments__content='test')._query)
+        self.assertEqual(BlogPost.objects(comments__content='test').count(), 1)
+
+        BlogPost.drop_collection()
+
+    def test_query_pk_field_name(self):
+        """Ensure that the correct "primary key" field name is used when
+        querying
+        """
+        class BlogPost(Document):
+            title = StringField(primary_key=True, db_field='postTitle')
+
+        BlogPost.drop_collection()
+
+        data = {'title': 'Post 1'}
+        post = BlogPost(**data)
+        post.save()
+
+        self.assertTrue('_id' in BlogPost.objects(pk=data['title'])._query)
+        self.assertTrue('_id' in BlogPost.objects(title=data['title'])._query)
+        self.assertEqual(BlogPost.objects(pk=data['title']).count(), 1)
+
+        BlogPost.drop_collection()
+
+    def test_chaining(self):
+        class A(Document):
+            pass
+
+        class B(Document):
+            a = ReferenceField(A)
+
+        A.drop_collection()
+        B.drop_collection()
+
+        a1 = A().save()
+        a2 = A().save()
+
+        B(a=a1).save()
+
+        # Works
+        q1 = B.objects.filter(a__in=[a1, a2], a=a1)._query
+
+        # Doesn't work
+        q2 = B.objects.filter(a__in=[a1, a2])
+        q2 = q2.filter(a=a1)._query
+
+        self.assertEqual(q1, q2)
+
+    def test_raw_query_and_Q_objects(self):
+        """
+        Test raw plays nicely
+        """
+        class Foo(Document):
+            name = StringField()
+            a = StringField()
+            b = StringField()
+            c = StringField()
+
+            meta = {
+                'allow_inheritance': False
+            }
+
+        query = Foo.objects(__raw__={'$nor': [{'name': 'bar'}]})._query
+        self.assertEqual(query, {'$nor': [{'name': 'bar'}]})
+
+        q1 = {'$or': [{'a': 1}, {'b': 1}]}
+        query = Foo.objects(Q(__raw__=q1) & Q(c=1))._query
+        self.assertEqual(query, {'$or': [{'a': 1}, {'b': 1}], 'c': 1})
+
+    def test_raw_and_merging(self):
+        class Doc(Document):
+            meta = {'allow_inheritance': False}
+
+        raw_query = Doc.objects(__raw__={
+            'deleted': False,
+            'scraped': 'yes',
+            '$nor': [
+                {'views.extracted': 'no'},
+                {'attachments.views.extracted': 'no'}
+            ]
+        })._query
+
+        self.assertEqual(raw_query, {
+            'deleted': False,
+            'scraped': 'yes',
+            '$nor': [
+                {'views.extracted': 'no'},
+                {'attachments.views.extracted': 'no'}
+            ]
+        })
+
+    def test_geojson_PointField(self):
+        class Location(Document):
+            loc = PointField()
+
+        update = transform.update(Location, set__loc=[1, 2])
+        self.assertEqual(update, {'$set': {'loc': {"type": "Point", "coordinates": [1, 2]}}})
+
+        update = transform.update(Location, set__loc={"type": "Point", "coordinates": [1, 2]})
+        self.assertEqual(update, {'$set': {'loc': {"type": "Point", "coordinates": [1, 2]}}})
+
+    def test_geojson_LineStringField(self):
+        class Location(Document):
+            line = LineStringField()
+
+        update = transform.update(Location, set__line=[[1, 2], [2, 2]])
+        self.assertEqual(update, {'$set': {'line': {"type": "LineString", "coordinates": [[1, 2], [2, 2]]}}})
+
+        update = transform.update(Location, set__line={"type": "LineString", "coordinates": [[1, 2], [2, 2]]})
+        self.assertEqual(update, {'$set': {'line': {"type": "LineString", "coordinates": [[1, 2], [2, 2]]}}})
+
+    def test_geojson_PolygonField(self):
+        class Location(Document):
+            poly = PolygonField()
+
+        update = transform.update(Location, set__poly=[[[40, 5], [40, 6], [41, 6], [40, 5]]])
+        self.assertEqual(update, {'$set': {'poly': {"type": "Polygon", "coordinates": [[[40, 5], [40, 6], [41, 6], [40, 5]]]}}})
+
+        update = transform.update(Location, set__poly={"type": "Polygon", "coordinates": [[[40, 5], [40, 6], [41, 6], [40, 5]]]})
+        self.assertEqual(update, {'$set': {'poly': {"type": "Polygon", "coordinates": [[[40, 5], [40, 6], [41, 6], [40, 5]]]}}})
+
+    def test_type(self):
+        class Doc(Document):
+            df = DynamicField()
+        Doc(df=True).save()
+        Doc(df=7).save()
+        Doc(df="df").save()
+        self.assertEqual(Doc.objects(df__type=1).count(), 0)  # double
+        self.assertEqual(Doc.objects(df__type=8).count(), 1)  # bool
+        self.assertEqual(Doc.objects(df__type=2).count(), 1)  # str
+        self.assertEqual(Doc.objects(df__type=16).count(), 1)  # int
+
+    def test_last_field_name_like_operator(self):
+        class EmbeddedItem(EmbeddedDocument):
+            type = StringField()
+            name = StringField()
+
+        class Doc(Document):
+            item = EmbeddedDocumentField(EmbeddedItem)
+
+        Doc.drop_collection()
+
+        doc = Doc(item=EmbeddedItem(type="axe", name="Heroic axe"))
+        doc.save()
+
+        self.assertEqual(1, Doc.objects(item__type__="axe").count())
+        self.assertEqual(1, Doc.objects(item__name__="Heroic axe").count())
+
+        Doc.objects(id=doc.id).update(set__item__type__='sword')
+        self.assertEqual(1, Doc.objects(item__type__="sword").count())
+        self.assertEqual(0, Doc.objects(item__type__="axe").count())
+
+    def test_understandable_error_raised(self):
+        class Event(Document):
+            title = StringField()
+            location = GeoPointField()
+
+        box = [(35.0, -125.0), (40.0, -100.0)]
+        # I *meant* to execute location__within_box=box
+        events = Event.objects(location__within=box)
+        with self.assertRaises(InvalidQueryError):
+            events.count()
+    
+    def test_update_pull_for_list_fields(self):
+        """ 
+        Test added to check pull operation in update for 
+        EmbeddedDocumentListField which is inside a EmbeddedDocumentField
+        """
+        class Word(EmbeddedDocument):
+            word = StringField()
+            index = IntField()
+        
+        class SubDoc(EmbeddedDocument):
+            heading = ListField(StringField())
+            text = EmbeddedDocumentListField(Word)
+        
+        class MainDoc(Document):
+            title = StringField()
+            content = EmbeddedDocumentField(SubDoc)
+        
+        word = Word(word='abc', index=1)
+        update = transform.update(MainDoc, pull__content__text=word)
+        self.assertEqual(update, {'$pull': {'content.text': SON([('word', u'abc'), ('index', 1)])}})
+
+        update = transform.update(MainDoc, pull__content__heading='xyz')
+        self.assertEqual(update, {'$pull': {'content.heading': 'xyz'}})
+        
+        
+if __name__ == '__main__':
+    unittest.main()

tests/queryset/visitor.py

@@ -0,0 +1,347 @@
+import datetime
+import re
+import unittest
+
+from bson import ObjectId
+
+from mongoengine import *
+from mongoengine.errors import InvalidQueryError
+from mongoengine.queryset import Q
+
+__all__ = ("QTest",)
+
+
+class QTest(unittest.TestCase):
+
+    def setUp(self):
+        connect(db='mongoenginetest')
+
+        class Person(Document):
+            name = StringField()
+            age = IntField()
+            meta = {'allow_inheritance': True}
+
+        Person.drop_collection()
+        self.Person = Person
+
+    def test_empty_q(self):
+        """Ensure that empty Q objects won't hurt.
+        """
+        q1 = Q()
+        q2 = Q(age__gte=18)
+        q3 = Q()
+        q4 = Q(name='test')
+        q5 = Q()
+
+        class Person(Document):
+            name = StringField()
+            age = IntField()
+
+        query = {'$or': [{'age': {'$gte': 18}}, {'name': 'test'}]}
+        self.assertEqual((q1 | q2 | q3 | q4 | q5).to_query(Person), query)
+
+        query = {'age': {'$gte': 18}, 'name': 'test'}
+        self.assertEqual((q1 & q2 & q3 & q4 & q5).to_query(Person), query)
+
+    def test_q_with_dbref(self):
+        """Ensure Q objects handle DBRefs correctly"""
+        connect(db='mongoenginetest')
+
+        class User(Document):
+            pass
+
+        class Post(Document):
+            created_user = ReferenceField(User)
+
+        user = User.objects.create()
+        Post.objects.create(created_user=user)
+
+        self.assertEqual(Post.objects.filter(created_user=user).count(), 1)
+        self.assertEqual(Post.objects.filter(Q(created_user=user)).count(), 1)
+
+    def test_and_combination(self):
+        """Ensure that Q-objects correctly AND together.
+        """
+        class TestDoc(Document):
+            x = IntField()
+            y = StringField()
+
+        query = (Q(x__lt=7) & Q(x__lt=3)).to_query(TestDoc)
+        self.assertEqual(query, {'$and': [{'x': {'$lt': 7}}, {'x': {'$lt': 3}}]})
+
+        query = (Q(y="a") & Q(x__lt=7) & Q(x__lt=3)).to_query(TestDoc)
+        self.assertEqual(query, {'$and': [{'y': "a"}, {'x': {'$lt': 7}}, {'x': {'$lt': 3}}]})
+
+        # Check normal cases work without an error
+        query = Q(x__lt=7) & Q(x__gt=3)
+
+        q1 = Q(x__lt=7)
+        q2 = Q(x__gt=3)
+        query = (q1 & q2).to_query(TestDoc)
+        self.assertEqual(query, {'x': {'$lt': 7, '$gt': 3}})
+
+        # More complex nested example
+        query = Q(x__lt=100) & Q(y__ne='NotMyString')
+        query &= Q(y__in=['a', 'b', 'c']) & Q(x__gt=-100)
+        mongo_query = {
+            'x': {'$lt': 100, '$gt': -100},
+            'y': {'$ne': 'NotMyString', '$in': ['a', 'b', 'c']},
+        }
+        self.assertEqual(query.to_query(TestDoc), mongo_query)
+
+    def test_or_combination(self):
+        """Ensure that Q-objects correctly OR together.
+        """
+        class TestDoc(Document):
+            x = IntField()
+
+        q1 = Q(x__lt=3)
+        q2 = Q(x__gt=7)
+        query = (q1 | q2).to_query(TestDoc)
+        self.assertEqual(query, {
+            '$or': [
+                {'x': {'$lt': 3}},
+                {'x': {'$gt': 7}},
+            ]
+        })
+
+    def test_and_or_combination(self):
+        """Ensure that Q-objects handle ANDing ORed components.
+        """
+        class TestDoc(Document):
+            x = IntField()
+            y = BooleanField()
+
+        TestDoc.drop_collection()
+
+        query = (Q(x__gt=0) | Q(x__exists=False))
+        query &= Q(x__lt=100)
+        self.assertEqual(query.to_query(TestDoc), {'$and': [
+            {'$or': [{'x': {'$gt': 0}},
+                     {'x': {'$exists': False}}]},
+            {'x': {'$lt': 100}}]
+        })
+
+        q1 = (Q(x__gt=0) | Q(x__exists=False))
+        q2 = (Q(x__lt=100) | Q(y=True))
+        query = (q1 & q2).to_query(TestDoc)
+
+        TestDoc(x=101).save()
+        TestDoc(x=10).save()
+        TestDoc(y=True).save()
+
+        self.assertEqual(query, {
+            '$and': [
+                {'$or': [{'x': {'$gt': 0}}, {'x': {'$exists': False}}]},
+                {'$or': [{'x': {'$lt': 100}}, {'y': True}]}
+            ]
+        })
+        self.assertEqual(2, TestDoc.objects(q1 & q2).count())
+
+    def test_or_and_or_combination(self):
+        """Ensure that Q-objects handle ORing ANDed ORed components. :)
+        """
+        class TestDoc(Document):
+            x = IntField()
+            y = BooleanField()
+
+        TestDoc.drop_collection()
+        TestDoc(x=-1, y=True).save()
+        TestDoc(x=101, y=True).save()
+        TestDoc(x=99, y=False).save()
+        TestDoc(x=101, y=False).save()
+
+        q1 = (Q(x__gt=0) & (Q(y=True) | Q(y__exists=False)))
+        q2 = (Q(x__lt=100) & (Q(y=False) | Q(y__exists=False)))
+        query = (q1 | q2).to_query(TestDoc)
+
+        self.assertEqual(query, {
+            '$or': [
+                {'$and': [{'x': {'$gt': 0}},
+                          {'$or': [{'y': True}, {'y': {'$exists': False}}]}]},
+                {'$and': [{'x': {'$lt': 100}},
+                          {'$or': [{'y': False}, {'y': {'$exists': False}}]}]}
+            ]
+        })
+        self.assertEqual(2, TestDoc.objects(q1 | q2).count())
+
+    def test_multiple_occurence_in_field(self):
+        class Test(Document):
+            name = StringField(max_length=40)
+            title = StringField(max_length=40)
+
+        q1 = Q(name__contains='te') | Q(title__contains='te')
+        q2 = Q(name__contains='12') | Q(title__contains='12')
+
+        q3 = q1 & q2
+
+        query = q3.to_query(Test)
+        self.assertEqual(query["$and"][0], q1.to_query(Test))
+        self.assertEqual(query["$and"][1], q2.to_query(Test))
+
+    def test_q_clone(self):
+
+        class TestDoc(Document):
+            x = IntField()
+
+        TestDoc.drop_collection()
+        for i in range(1, 101):
+            t = TestDoc(x=i)
+            t.save()
+
+        # Check normal cases work without an error
+        test = TestDoc.objects(Q(x__lt=7) & Q(x__gt=3))
+
+        self.assertEqual(test.count(), 3)
+
+        test2 = test.clone()
+        self.assertEqual(test2.count(), 3)
+        self.assertFalse(test2 == test)
+
+        test3 = test2.filter(x=6)
+        self.assertEqual(test3.count(), 1)
+        self.assertEqual(test.count(), 3)
+
+    def test_q(self):
+        """Ensure that Q objects may be used to query for documents.
+        """
+        class BlogPost(Document):
+            title = StringField()
+            publish_date = DateTimeField()
+            published = BooleanField()
+
+        BlogPost.drop_collection()
+
+        post1 = BlogPost(title='Test 1', publish_date=datetime.datetime(2010, 1, 8), published=False)
+        post1.save()
+
+        post2 = BlogPost(title='Test 2', publish_date=datetime.datetime(2010, 1, 15), published=True)
+        post2.save()
+
+        post3 = BlogPost(title='Test 3', published=True)
+        post3.save()
+
+        post4 = BlogPost(title='Test 4', publish_date=datetime.datetime(2010, 1, 8))
+        post4.save()
+
+        post5 = BlogPost(title='Test 1', publish_date=datetime.datetime(2010, 1, 15))
+        post5.save()
+
+        post6 = BlogPost(title='Test 1', published=False)
+        post6.save()
+
+        # Check ObjectId lookup works
+        obj = BlogPost.objects(id=post1.id).first()
+        self.assertEqual(obj, post1)
+
+        # Check Q object combination with one does not exist
+        q = BlogPost.objects(Q(title='Test 5') | Q(published=True))
+        posts = [post.id for post in q]
+
+        published_posts = (post2, post3)
+        self.assertTrue(all(obj.id in posts for obj in published_posts))
+
+        q = BlogPost.objects(Q(title='Test 1') | Q(published=True))
+        posts = [post.id for post in q]
+        published_posts = (post1, post2, post3, post5, post6)
+        self.assertTrue(all(obj.id in posts for obj in published_posts))
+
+        # Check Q object combination
+        date = datetime.datetime(2010, 1, 10)
+        q = BlogPost.objects(Q(publish_date__lte=date) | Q(published=True))
+        posts = [post.id for post in q]
+
+        published_posts = (post1, post2, post3, post4)
+        self.assertTrue(all(obj.id in posts for obj in published_posts))
+
+        self.assertFalse(any(obj.id in posts for obj in [post5, post6]))
+
+        BlogPost.drop_collection()
+
+        # Check the 'in' operator
+        self.Person(name='user1', age=20).save()
+        self.Person(name='user2', age=20).save()
+        self.Person(name='user3', age=30).save()
+        self.Person(name='user4', age=40).save()
+
+        self.assertEqual(self.Person.objects(Q(age__in=[20])).count(), 2)
+        self.assertEqual(self.Person.objects(Q(age__in=[20, 30])).count(), 3)
+
+        # Test invalid query objs
+        with self.assertRaises(InvalidQueryError):
+            self.Person.objects('user1')
+
+        # filter should fail, too
+        with self.assertRaises(InvalidQueryError):
+            self.Person.objects.filter('user1')
+
+
+    def test_q_regex(self):
+        """Ensure that Q objects can be queried using regexes.
+        """
+        person = self.Person(name='Guido van Rossum')
+        person.save()
+
+        obj = self.Person.objects(Q(name=re.compile('^Gui'))).first()
+        self.assertEqual(obj, person)
+        obj = self.Person.objects(Q(name=re.compile('^gui'))).first()
+        self.assertEqual(obj, None)
+
+        obj = self.Person.objects(Q(name=re.compile('^gui', re.I))).first()
+        self.assertEqual(obj, person)
+
+        obj = self.Person.objects(Q(name__not=re.compile('^bob'))).first()
+        self.assertEqual(obj, person)
+
+        obj = self.Person.objects(Q(name__not=re.compile('^Gui'))).first()
+        self.assertEqual(obj, None)
+
+    def test_q_lists(self):
+        """Ensure that Q objects query ListFields correctly.
+        """
+        class BlogPost(Document):
+            tags = ListField(StringField())
+
+        BlogPost.drop_collection()
+
+        BlogPost(tags=['python', 'mongo']).save()
+        BlogPost(tags=['python']).save()
+
+        self.assertEqual(BlogPost.objects(Q(tags='mongo')).count(), 1)
+        self.assertEqual(BlogPost.objects(Q(tags='python')).count(), 2)
+
+        BlogPost.drop_collection()
+
+    def test_q_merge_queries_edge_case(self):
+
+        class User(Document):
+            email = EmailField(required=False)
+            name = StringField()
+
+        User.drop_collection()
+        pk = ObjectId()
+        User(email='example@example.com', pk=pk).save()
+
+        self.assertEqual(1, User.objects.filter(Q(email='example@example.com') |
+                                                Q(name='John Doe')).limit(2).filter(pk=pk).count())
+
+    def test_chained_q_or_filtering(self):
+
+        class Post(EmbeddedDocument):
+            name = StringField(required=True)
+
+        class Item(Document):
+            postables = ListField(EmbeddedDocumentField(Post))
+
+        Item.drop_collection()
+
+        Item(postables=[Post(name="a"), Post(name="b")]).save()
+        Item(postables=[Post(name="a"), Post(name="c")]).save()
+        Item(postables=[Post(name="a"), Post(name="b"), Post(name="c")]).save()
+
+        self.assertEqual(Item.objects(Q(postables__name="a") & Q(postables__name="b")).count(), 2)
+        self.assertEqual(Item.objects.filter(postables__name="a").filter(postables__name="b").count(), 2)
+
+
+if __name__ == '__main__':
+    unittest.main()

tests/test_all_warnings.py

@@ -1,96 +0,0 @@
-import unittest
-import warnings
-
-from mongoengine import *
-from mongoengine.tests import query_counter
-
-
-class TestWarnings(unittest.TestCase):
-
-    def setUp(self):
-        conn = connect(db='mongoenginetest')
-        self.warning_list = []
-        self.showwarning_default = warnings.showwarning
-        warnings.showwarning = self.append_to_warning_list
-
-    def append_to_warning_list(self, message, category, *args):
-        self.warning_list.append({"message": message,
-                                  "category": category})
-
-    def tearDown(self):
-        # restore default handling of warnings
-        warnings.showwarning = self.showwarning_default
-
-    def test_allow_inheritance_future_warning(self):
-        """Add FutureWarning for future allow_inhertiance default change.
-        """
-
-        class SimpleBase(Document):
-            a = IntField()
-
-        class InheritedClass(SimpleBase):
-            b = IntField()
-
-        InheritedClass()
-        self.assertEqual(len(self.warning_list), 1)
-        warning = self.warning_list[0]
-        self.assertEqual(FutureWarning, warning["category"])
-        self.assertTrue("InheritedClass" in str(warning["message"]))
-
-    def test_dbref_reference_field_future_warning(self):
-
-        class Person(Document):
-            name = StringField()
-            parent = ReferenceField('self')
-
-        Person.drop_collection()
-
-        p1 = Person()
-        p1.parent = None
-        p1.save()
-
-        p2 = Person(name="Wilson Jr")
-        p2.parent = p1
-        p2.save(cascade=False)
-
-        self.assertEqual(len(self.warning_list), 1)
-        warning = self.warning_list[0]
-        self.assertEqual(FutureWarning, warning["category"])
-        self.assertTrue("ReferenceFields will default to using ObjectId"
-                        in str(warning["message"]))
-
-    def test_document_save_cascade_future_warning(self):
-
-        class Person(Document):
-            name = StringField()
-            parent = ReferenceField('self')
-
-        Person.drop_collection()
-
-        p1 = Person(name="Wilson Snr")
-        p1.parent = None
-        p1.save()
-
-        p2 = Person(name="Wilson Jr")
-        p2.parent = p1
-        p2.parent.name = "Poppa Wilson"
-        p2.save()
-
-        self.assertEqual(len(self.warning_list), 1)
-        warning = self.warning_list[0]
-        self.assertEqual(FutureWarning, warning["category"])
-        self.assertTrue("Cascading saves will default to off in 0.8"
-                        in str(warning["message"]))
-
-    def test_document_collection_syntax_warning(self):
-
-        class NonAbstractBase(Document):
-            pass
-
-        class InheritedDocumentFailTest(NonAbstractBase):
-            meta = {'collection': 'fail'}
-
-        warning = self.warning_list[0]
-        self.assertEqual(SyntaxWarning, warning["category"])
-        self.assertEqual('non_abstract_base',
-                         InheritedDocumentFailTest._get_collection_name())

tests/test_connection.py

@@ -1,13 +1,30 @@
 import datetime
-import pymongo
+from pymongo.errors import OperationFailure
+
+try:
+    import unittest2 as unittest
+except ImportError:
     import unittest
+from nose.plugins.skip import SkipTest
 
-import mongoengine.connection
+import pymongo
-
 from bson.tz_util import utc
 
-from mongoengine import *
+from mongoengine import (
-from mongoengine.connection import get_db, get_connection, ConnectionError
+    connect, register_connection,
+    Document, DateTimeField
+)
+from mongoengine.python_support import IS_PYMONGO_3
+import mongoengine.connection
+from mongoengine.connection import (MongoEngineConnectionError, get_db,
+                                    get_connection)
+
+
+def get_tz_awareness(connection):
+    if not IS_PYMONGO_3:
+        return connection.tz_aware
+    else:
+        return connection.codec_options.tz_aware
 
 
 class ConnectionTest(unittest.TestCase):
@@ -18,12 +35,11 @@ class ConnectionTest(unittest.TestCase):
         mongoengine.connection._dbs = {}
 
     def test_connect(self):
-        """Ensure that the connect() method works properly.
+        """Ensure that the connect() method works properly."""
-        """
         connect('mongoenginetest')
 
         conn = get_connection()
-        self.assertTrue(isinstance(conn, pymongo.connection.Connection))
+        self.assertTrue(isinstance(conn, pymongo.mongo_client.MongoClient))
 
         db = get_db()
         self.assertTrue(isinstance(db, pymongo.database.Database))
@@ -31,11 +47,105 @@ class ConnectionTest(unittest.TestCase):
 
         connect('mongoenginetest2', alias='testdb')
         conn = get_connection('testdb')
-        self.assertTrue(isinstance(conn, pymongo.connection.Connection))
+        self.assertTrue(isinstance(conn, pymongo.mongo_client.MongoClient))
+
+    def test_connect_in_mocking(self):
+        """Ensure that the connect() method works properly in mocking.
+        """
+        try:
+            import mongomock
+        except ImportError:
+            raise SkipTest('you need mongomock installed to run this testcase')
+
+        connect('mongoenginetest', host='mongomock://localhost')
+        conn = get_connection()
+        self.assertTrue(isinstance(conn, mongomock.MongoClient))
+
+        connect('mongoenginetest2', host='mongomock://localhost', alias='testdb2')
+        conn = get_connection('testdb2')
+        self.assertTrue(isinstance(conn, mongomock.MongoClient))
+
+        connect('mongoenginetest3', host='mongodb://localhost', is_mock=True, alias='testdb3')
+        conn = get_connection('testdb3')
+        self.assertTrue(isinstance(conn, mongomock.MongoClient))
+
+        connect('mongoenginetest4', is_mock=True, alias='testdb4')
+        conn = get_connection('testdb4')
+        self.assertTrue(isinstance(conn, mongomock.MongoClient))
+
+        connect(host='mongodb://localhost:27017/mongoenginetest5', is_mock=True, alias='testdb5')
+        conn = get_connection('testdb5')
+        self.assertTrue(isinstance(conn, mongomock.MongoClient))
+
+        connect(host='mongomock://localhost:27017/mongoenginetest6', alias='testdb6')
+        conn = get_connection('testdb6')
+        self.assertTrue(isinstance(conn, mongomock.MongoClient))
+
+        connect(host='mongomock://localhost:27017/mongoenginetest7', is_mock=True, alias='testdb7')
+        conn = get_connection('testdb7')
+        self.assertTrue(isinstance(conn, mongomock.MongoClient))
+
+    def test_connect_with_host_list(self):
+        """Ensure that the connect() method works when host is a list
+
+        Uses mongomock to test w/o needing multiple mongod/mongos processes
+        """
+        try:
+            import mongomock
+        except ImportError:
+            raise SkipTest('you need mongomock installed to run this testcase')
+
+        connect(host=['mongomock://localhost'])
+        conn = get_connection()
+        self.assertTrue(isinstance(conn, mongomock.MongoClient))
+
+        connect(host=['mongodb://localhost'], is_mock=True,  alias='testdb2')
+        conn = get_connection('testdb2')
+        self.assertTrue(isinstance(conn, mongomock.MongoClient))
+
+        connect(host=['localhost'], is_mock=True,  alias='testdb3')
+        conn = get_connection('testdb3')
+        self.assertTrue(isinstance(conn, mongomock.MongoClient))
+
+        connect(host=['mongomock://localhost:27017', 'mongomock://localhost:27018'], alias='testdb4')
+        conn = get_connection('testdb4')
+        self.assertTrue(isinstance(conn, mongomock.MongoClient))
+
+        connect(host=['mongodb://localhost:27017', 'mongodb://localhost:27018'], is_mock=True,  alias='testdb5')
+        conn = get_connection('testdb5')
+        self.assertTrue(isinstance(conn, mongomock.MongoClient))
+
+        connect(host=['localhost:27017', 'localhost:27018'], is_mock=True,  alias='testdb6')
+        conn = get_connection('testdb6')
+        self.assertTrue(isinstance(conn, mongomock.MongoClient))
+
+    def test_disconnect(self):
+        """Ensure that the disconnect() method works properly
+        """
+        conn1 = connect('mongoenginetest')
+        mongoengine.connection.disconnect()
+        conn2 = connect('mongoenginetest')
+        self.assertTrue(conn1 is not conn2)
+
+    def test_sharing_connections(self):
+        """Ensure that connections are shared when the connection settings are exactly the same
+        """
+        connect('mongoenginetests', alias='testdb1')
+        expected_connection = get_connection('testdb1')
+
+        connect('mongoenginetests', alias='testdb2')
+        actual_connection = get_connection('testdb2')
+
+        # Handle PyMongo 3+ Async Connection
+        if IS_PYMONGO_3:
+            # Ensure we are connected, throws ServerSelectionTimeoutError otherwise.
+            # Purposely not catching exception to fail test if thrown.
+            expected_connection.server_info()
+
+        self.assertEqual(expected_connection, actual_connection)
 
     def test_connect_uri(self):
-        """Ensure that the connect() method works properly with uri's
+        """Ensure that the connect() method works properly with URIs."""
-        """
         c = connect(db='mongoenginetest', alias='admin')
         c.admin.system.users.remove({})
         c.mongoenginetest.system.users.remove({})
@@ -44,41 +154,202 @@ class ConnectionTest(unittest.TestCase):
         c.admin.authenticate("admin", "password")
         c.mongoenginetest.add_user("username", "password")
 
-        self.assertRaises(ConnectionError, connect, "testdb_uri_bad", host='mongodb://test:password@localhost')
+        if not IS_PYMONGO_3:
+            self.assertRaises(
+                MongoEngineConnectionError, connect, 'testdb_uri_bad',
+                host='mongodb://test:password@localhost'
+            )
 
         connect("testdb_uri", host='mongodb://username:password@localhost/mongoenginetest')
 
         conn = get_connection()
-        self.assertTrue(isinstance(conn, pymongo.connection.Connection))
+        self.assertTrue(isinstance(conn, pymongo.mongo_client.MongoClient))
 
         db = get_db()
         self.assertTrue(isinstance(db, pymongo.database.Database))
         self.assertEqual(db.name, 'mongoenginetest')
 
+        c.admin.system.users.remove({})
+        c.mongoenginetest.system.users.remove({})
+
+    def test_connect_uri_without_db(self):
+        """Ensure connect() method works properly if the URI doesn't
+        include a database name.
+        """
+        connect("mongoenginetest", host='mongodb://localhost/')
+
+        conn = get_connection()
+        self.assertTrue(isinstance(conn, pymongo.mongo_client.MongoClient))
+
+        db = get_db()
+        self.assertTrue(isinstance(db, pymongo.database.Database))
+        self.assertEqual(db.name, 'mongoenginetest')
+
+    def test_connect_uri_default_db(self):
+        """Ensure connect() defaults to the right database name if
+        the URI and the database_name don't explicitly specify it.
+        """
+        connect(host='mongodb://localhost/')
+
+        conn = get_connection()
+        self.assertTrue(isinstance(conn, pymongo.mongo_client.MongoClient))
+
+        db = get_db()
+        self.assertTrue(isinstance(db, pymongo.database.Database))
+        self.assertEqual(db.name, 'test')
+
+    def test_uri_without_credentials_doesnt_override_conn_settings(self):
+        """Ensure connect() uses the username & password params if the URI
+        doesn't explicitly specify them.
+        """
+        c = connect(host='mongodb://localhost/mongoenginetest',
+                    username='user',
+                    password='pass')
+
+        # OperationFailure means that mongoengine attempted authentication
+        # w/ the provided username/password and failed - that's the desired
+        # behavior. If the MongoDB URI would override the credentials
+        self.assertRaises(OperationFailure, get_db)
+
+    def test_connect_uri_with_authsource(self):
+        """Ensure that the connect() method works well with `authSource`
+        option in the URI.
+        """
+        # Create users
+        c = connect('mongoenginetest')
+        c.admin.system.users.remove({})
+        c.admin.add_user('username2', 'password')
+
+        # Authentication fails without "authSource"
+        if IS_PYMONGO_3:
+            test_conn = connect(
+                'mongoenginetest', alias='test1',
+                host='mongodb://username2:password@localhost/mongoenginetest'
+            )
+            self.assertRaises(OperationFailure, test_conn.server_info)
+        else:
+            self.assertRaises(
+                MongoEngineConnectionError,
+                connect, 'mongoenginetest', alias='test1',
+                host='mongodb://username2:password@localhost/mongoenginetest'
+            )
+            self.assertRaises(MongoEngineConnectionError, get_db, 'test1')
+
+        # Authentication succeeds with "authSource"
+        authd_conn = connect(
+            'mongoenginetest', alias='test2',
+            host=('mongodb://username2:password@localhost/'
+                  'mongoenginetest?authSource=admin')
+        )
+        db = get_db('test2')
+        self.assertTrue(isinstance(db, pymongo.database.Database))
+        self.assertEqual(db.name, 'mongoenginetest')
+
+        # Clear all users
+        authd_conn.admin.system.users.remove({})
+
     def test_register_connection(self):
         """Ensure that connections with different aliases may be registered.
         """
         register_connection('testdb', 'mongoenginetest2')
 
-        self.assertRaises(ConnectionError, get_connection)
+        self.assertRaises(MongoEngineConnectionError, get_connection)
         conn = get_connection('testdb')
-        self.assertTrue(isinstance(conn, pymongo.connection.Connection))
+        self.assertTrue(isinstance(conn, pymongo.mongo_client.MongoClient))
 
         db = get_db('testdb')
         self.assertTrue(isinstance(db, pymongo.database.Database))
         self.assertEqual(db.name, 'mongoenginetest2')
 
-    def test_connection_kwargs(self):
+    def test_register_connection_defaults(self):
-        """Ensure that connection kwargs get passed to pymongo.
+        """Ensure that defaults are used when the host and port are None.
         """
+        register_connection('testdb', 'mongoenginetest', host=None, port=None)
+
+        conn = get_connection('testdb')
+        self.assertTrue(isinstance(conn, pymongo.mongo_client.MongoClient))
+
+    def test_connection_kwargs(self):
+        """Ensure that connection kwargs get passed to pymongo."""
         connect('mongoenginetest', alias='t1', tz_aware=True)
         conn = get_connection('t1')
 
-        self.assertTrue(conn.tz_aware)
+        self.assertTrue(get_tz_awareness(conn))
 
         connect('mongoenginetest2', alias='t2')
         conn = get_connection('t2')
-        self.assertFalse(conn.tz_aware)
+        self.assertFalse(get_tz_awareness(conn))
+
+    def test_connection_pool_via_kwarg(self):
+        """Ensure we can specify a max connection pool size using
+        a connection kwarg.
+        """
+        # Use "max_pool_size" or "maxpoolsize" depending on PyMongo version
+        # (former was changed to the latter as described in
+        # https://jira.mongodb.org/browse/PYTHON-854).
+        # TODO remove once PyMongo < 3.0 support is dropped
+        if pymongo.version_tuple[0] >= 3:
+            pool_size_kwargs = {'maxpoolsize': 100}
+        else:
+            pool_size_kwargs = {'max_pool_size': 100}
+
+        conn = connect('mongoenginetest', alias='max_pool_size_via_kwarg', **pool_size_kwargs)
+        self.assertEqual(conn.max_pool_size, 100)
+
+    def test_connection_pool_via_uri(self):
+        """Ensure we can specify a max connection pool size using
+        an option in a connection URI.
+        """
+        if pymongo.version_tuple[0] == 2 and pymongo.version_tuple[1] < 9:
+            raise SkipTest('maxpoolsize as a URI option is only supported in PyMongo v2.9+')
+
+        conn = connect(host='mongodb://localhost/test?maxpoolsize=100', alias='max_pool_size_via_uri')
+        self.assertEqual(conn.max_pool_size, 100)
+
+    def test_write_concern(self):
+        """Ensure write concern can be specified in connect() via
+        a kwarg or as part of the connection URI.
+        """
+        conn1 = connect(alias='conn1', host='mongodb://localhost/testing?w=1&j=true')
+        conn2 = connect('testing', alias='conn2', w=1, j=True)
+        if IS_PYMONGO_3:
+            self.assertEqual(conn1.write_concern.document, {'w': 1, 'j': True})
+            self.assertEqual(conn2.write_concern.document, {'w': 1, 'j': True})
+        else:
+            self.assertEqual(dict(conn1.write_concern), {'w': 1, 'j': True})
+            self.assertEqual(dict(conn2.write_concern), {'w': 1, 'j': True})
+
+    def test_connect_with_replicaset_via_uri(self):
+        """Ensure connect() works when specifying a replicaSet via the
+        MongoDB URI.
+        """
+        if IS_PYMONGO_3:
+            c = connect(host='mongodb://localhost/test?replicaSet=local-rs')
+            db = get_db()
+            self.assertTrue(isinstance(db, pymongo.database.Database))
+            self.assertEqual(db.name, 'test')
+        else:
+            # PyMongo < v3.x raises an exception:
+            # "localhost:27017 is not a member of replica set local-rs"
+            with self.assertRaises(MongoEngineConnectionError):
+                c = connect(host='mongodb://localhost/test?replicaSet=local-rs')
+
+    def test_connect_with_replicaset_via_kwargs(self):
+        """Ensure connect() works when specifying a replicaSet via the
+        connection kwargs
+        """
+        if IS_PYMONGO_3:
+            c = connect(replicaset='local-rs')
+            self.assertEqual(c._MongoClient__options.replica_set_name,
+                             'local-rs')
+            db = get_db()
+            self.assertTrue(isinstance(db, pymongo.database.Database))
+            self.assertEqual(db.name, 'test')
+        else:
+            # PyMongo < v3.x raises an exception:
+            # "localhost:27017 is not a member of replica set local-rs"
+            with self.assertRaises(MongoEngineConnectionError):
+                c = connect(replicaset='local-rs')
 
     def test_datetime(self):
         connect('mongoenginetest', tz_aware=True)
@@ -93,6 +364,27 @@ class ConnectionTest(unittest.TestCase):
         date_doc = DateDoc.objects.first()
         self.assertEqual(d, date_doc.the_date)
 
+    def test_multiple_connection_settings(self):
+        connect('mongoenginetest', alias='t1', host="localhost")
+
+        connect('mongoenginetest2', alias='t2', host="127.0.0.1")
+
+        mongo_connections = mongoengine.connection._connections
+        self.assertEqual(len(mongo_connections.items()), 2)
+        self.assertTrue('t1' in mongo_connections.keys())
+        self.assertTrue('t2' in mongo_connections.keys())
+        if not IS_PYMONGO_3:
+            self.assertEqual(mongo_connections['t1'].host, 'localhost')
+            self.assertEqual(mongo_connections['t2'].host, '127.0.0.1')
+        else:
+            # Handle PyMongo 3+ Async Connection
+            # Ensure we are connected, throws ServerSelectionTimeoutError otherwise.
+            # Purposely not catching exception to fail test if thrown.
+            mongo_connections['t1'].server_info()
+            mongo_connections['t2'].server_info()
+            self.assertEqual(mongo_connections['t1'].address[0], 'localhost')
+            self.assertEqual(mongo_connections['t2'].address[0], '127.0.0.1')
+
 
 if __name__ == '__main__':
     unittest.main()

tests/test_context_managers.py

@@ -0,0 +1,202 @@
+import unittest
+
+from mongoengine import *
+from mongoengine.connection import get_db
+from mongoengine.context_managers import (switch_db, switch_collection,
+                                          no_sub_classes, no_dereference,
+                                          query_counter)
+
+
+class ContextManagersTest(unittest.TestCase):
+
+    def test_switch_db_context_manager(self):
+        connect('mongoenginetest')
+        register_connection('testdb-1', 'mongoenginetest2')
+
+        class Group(Document):
+            name = StringField()
+
+        Group.drop_collection()
+
+        Group(name="hello - default").save()
+        self.assertEqual(1, Group.objects.count())
+
+        with switch_db(Group, 'testdb-1') as Group:
+
+            self.assertEqual(0, Group.objects.count())
+
+            Group(name="hello").save()
+
+            self.assertEqual(1, Group.objects.count())
+
+            Group.drop_collection()
+            self.assertEqual(0, Group.objects.count())
+
+        self.assertEqual(1, Group.objects.count())
+
+    def test_switch_collection_context_manager(self):
+        connect('mongoenginetest')
+        register_connection('testdb-1', 'mongoenginetest2')
+
+        class Group(Document):
+            name = StringField()
+
+        Group.drop_collection()
+        with switch_collection(Group, 'group1') as Group:
+            Group.drop_collection()
+
+        Group(name="hello - group").save()
+        self.assertEqual(1, Group.objects.count())
+
+        with switch_collection(Group, 'group1') as Group:
+
+            self.assertEqual(0, Group.objects.count())
+
+            Group(name="hello - group1").save()
+
+            self.assertEqual(1, Group.objects.count())
+
+            Group.drop_collection()
+            self.assertEqual(0, Group.objects.count())
+
+        self.assertEqual(1, Group.objects.count())
+
+    def test_no_dereference_context_manager_object_id(self):
+        """Ensure that DBRef items in ListFields aren't dereferenced.
+        """
+        connect('mongoenginetest')
+
+        class User(Document):
+            name = StringField()
+
+        class Group(Document):
+            ref = ReferenceField(User, dbref=False)
+            generic = GenericReferenceField()
+            members = ListField(ReferenceField(User, dbref=False))
+
+        User.drop_collection()
+        Group.drop_collection()
+
+        for i in range(1, 51):
+            User(name='user %s' % i).save()
+
+        user = User.objects.first()
+        Group(ref=user, members=User.objects, generic=user).save()
+
+        with no_dereference(Group) as NoDeRefGroup:
+            self.assertTrue(Group._fields['members']._auto_dereference)
+            self.assertFalse(NoDeRefGroup._fields['members']._auto_dereference)
+
+        with no_dereference(Group) as Group:
+            group = Group.objects.first()
+            self.assertTrue(all([not isinstance(m, User)
+                                for m in group.members]))
+            self.assertFalse(isinstance(group.ref, User))
+            self.assertFalse(isinstance(group.generic, User))
+
+        self.assertTrue(all([isinstance(m, User)
+                             for m in group.members]))
+        self.assertTrue(isinstance(group.ref, User))
+        self.assertTrue(isinstance(group.generic, User))
+
+    def test_no_dereference_context_manager_dbref(self):
+        """Ensure that DBRef items in ListFields aren't dereferenced.
+        """
+        connect('mongoenginetest')
+
+        class User(Document):
+            name = StringField()
+
+        class Group(Document):
+            ref = ReferenceField(User, dbref=True)
+            generic = GenericReferenceField()
+            members = ListField(ReferenceField(User, dbref=True))
+
+        User.drop_collection()
+        Group.drop_collection()
+
+        for i in range(1, 51):
+            User(name='user %s' % i).save()
+
+        user = User.objects.first()
+        Group(ref=user, members=User.objects, generic=user).save()
+
+        with no_dereference(Group) as NoDeRefGroup:
+            self.assertTrue(Group._fields['members']._auto_dereference)
+            self.assertFalse(NoDeRefGroup._fields['members']._auto_dereference)
+
+        with no_dereference(Group) as Group:
+            group = Group.objects.first()
+            self.assertTrue(all([not isinstance(m, User)
+                                for m in group.members]))
+            self.assertFalse(isinstance(group.ref, User))
+            self.assertFalse(isinstance(group.generic, User))
+
+        self.assertTrue(all([isinstance(m, User)
+                             for m in group.members]))
+        self.assertTrue(isinstance(group.ref, User))
+        self.assertTrue(isinstance(group.generic, User))
+
+    def test_no_sub_classes(self):
+        class A(Document):
+            x = IntField()
+            y = IntField()
+
+            meta = {'allow_inheritance': True}
+
+        class B(A):
+            z = IntField()
+
+        class C(B):
+            zz = IntField()
+
+        A.drop_collection()
+
+        A(x=10, y=20).save()
+        A(x=15, y=30).save()
+        B(x=20, y=40).save()
+        B(x=30, y=50).save()
+        C(x=40, y=60).save()
+
+        self.assertEqual(A.objects.count(), 5)
+        self.assertEqual(B.objects.count(), 3)
+        self.assertEqual(C.objects.count(), 1)
+
+        with no_sub_classes(A) as A:
+            self.assertEqual(A.objects.count(), 2)
+
+            for obj in A.objects:
+                self.assertEqual(obj.__class__, A)
+
+        with no_sub_classes(B) as B:
+            self.assertEqual(B.objects.count(), 2)
+
+            for obj in B.objects:
+                self.assertEqual(obj.__class__, B)
+
+        with no_sub_classes(C) as C:
+            self.assertEqual(C.objects.count(), 1)
+
+            for obj in C.objects:
+                self.assertEqual(obj.__class__, C)
+
+        # Confirm context manager exit correctly
+        self.assertEqual(A.objects.count(), 5)
+        self.assertEqual(B.objects.count(), 3)
+        self.assertEqual(C.objects.count(), 1)
+
+    def test_query_counter(self):
+        connect('mongoenginetest')
+        db = get_db()
+        db.test.find({})
+
+        with query_counter() as q:
+            self.assertEqual(0, q)
+
+            for i in range(1, 51):
+                db.test.find({}).count()
+
+            self.assertEqual(50, q)
+
+if __name__ == '__main__':
+    unittest.main()

tests/test_datastructures.py

@@ -0,0 +1,80 @@
+import unittest
+
+from mongoengine.base.datastructures import StrictDict
+
+
+class TestStrictDict(unittest.TestCase):
+    def strict_dict_class(self, *args, **kwargs):
+        return StrictDict.create(*args, **kwargs)
+
+    def setUp(self):
+        self.dtype = self.strict_dict_class(("a", "b", "c"))
+
+    def test_init(self):
+        d = self.dtype(a=1, b=1, c=1)
+        self.assertEqual((d.a, d.b, d.c), (1, 1, 1))
+
+    def test_repr(self):
+        d = self.dtype(a=1, b=2, c=3)
+        self.assertEqual(repr(d), '{"a": 1, "b": 2, "c": 3}')
+
+        # make sure quotes are escaped properly
+        d = self.dtype(a='"', b="'", c="")
+        self.assertEqual(repr(d), '{"a": \'"\', "b": "\'", "c": \'\'}')
+
+    def test_init_fails_on_nonexisting_attrs(self):
+        with self.assertRaises(AttributeError):
+            self.dtype(a=1, b=2, d=3)
+
+    def test_eq(self):
+        d = self.dtype(a=1, b=1, c=1)
+        dd = self.dtype(a=1, b=1, c=1)
+        e = self.dtype(a=1, b=1, c=3)
+        f = self.dtype(a=1, b=1)
+        g = self.strict_dict_class(("a", "b", "c", "d"))(a=1, b=1, c=1, d=1)
+        h = self.strict_dict_class(("a", "c", "b"))(a=1, b=1, c=1)
+        i = self.strict_dict_class(("a", "c", "b"))(a=1, b=1, c=2)
+
+        self.assertEqual(d, dd)
+        self.assertNotEqual(d, e)
+        self.assertNotEqual(d, f)
+        self.assertNotEqual(d, g)
+        self.assertNotEqual(f, d)
+        self.assertEqual(d, h)
+        self.assertNotEqual(d, i)
+
+    def test_setattr_getattr(self):
+        d = self.dtype()
+        d.a = 1
+        self.assertEqual(d.a, 1)
+        self.assertRaises(AttributeError, getattr, d, 'b')
+
+    def test_setattr_raises_on_nonexisting_attr(self):
+        d = self.dtype()
+        with self.assertRaises(AttributeError):
+            d.x = 1
+
+    def test_setattr_getattr_special(self):
+        d = self.strict_dict_class(["items"])
+        d.items = 1
+        self.assertEqual(d.items, 1)
+
+    def test_get(self):
+        d = self.dtype(a=1)
+        self.assertEqual(d.get('a'), 1)
+        self.assertEqual(d.get('b', 'bla'), 'bla')
+
+    def test_items(self):
+        d = self.dtype(a=1)
+        self.assertEqual(d.items(), [('a', 1)])
+        d = self.dtype(a=1, b=2)
+        self.assertEqual(d.items(), [('a', 1), ('b', 2)])
+
+    def test_mappings_protocol(self):
+        d = self.dtype(a=1, b=2)
+        assert dict(d) == {'a': 1, 'b': 2}
+        assert dict(**d) == {'a': 1, 'b': 2}
+
+
+if __name__ == '__main__':
+    unittest.main()

tests/test_dereference.py

@@ -1,18 +1,22 @@
-from __future__ import with_statement
+# -*- coding: utf-8 -*-
 import unittest
 
-from bson import DBRef
+from bson import DBRef, ObjectId
 
 from mongoengine import *
 from mongoengine.connection import get_db
-from mongoengine.tests import query_counter
+from mongoengine.context_managers import query_counter
 
 
 class FieldTest(unittest.TestCase):
 
-    def setUp(self):
+    @classmethod
-        connect(db='mongoenginetest')
+    def setUpClass(cls):
-        self.db = get_db()
+        cls.db = connect(db='mongoenginetest')
+
+    @classmethod
+    def tearDownClass(cls):
+        cls.db.drop_database('mongoenginetest')
 
     def test_list_item_dereference(self):
         """Ensure that DBRef items in ListFields are dereferenced.
@@ -26,7 +30,7 @@ class FieldTest(unittest.TestCase):
         User.drop_collection()
         Group.drop_collection()
 
-        for i in xrange(1, 51):
+        for i in range(1, 51):
             user = User(name='user %s' % i)
             user.save()
 
@@ -42,6 +46,12 @@ class FieldTest(unittest.TestCase):
             group_obj = Group.objects.first()
             self.assertEqual(q, 1)
 
+            len(group_obj._data['members'])
+            self.assertEqual(q, 1)
+
+            len(group_obj.members)
+            self.assertEqual(q, 2)
+
             [m for m in group_obj.members]
             self.assertEqual(q, 2)
 
@@ -78,12 +88,13 @@ class FieldTest(unittest.TestCase):
         User.drop_collection()
         Group.drop_collection()
 
-        for i in xrange(1, 51):
+        for i in range(1, 51):
             user = User(name='user %s' % i)
             user.save()
 
         group = Group(members=User.objects)
         group.save()
+        group.reload()  # Confirm reload works
 
         with query_counter() as q:
             self.assertEqual(q, 0)
@@ -116,6 +127,27 @@ class FieldTest(unittest.TestCase):
         User.drop_collection()
         Group.drop_collection()
 
+    def test_list_item_dereference_dref_false_stores_as_type(self):
+        """Ensure that DBRef items are stored as their type
+        """
+        class User(Document):
+            my_id = IntField(primary_key=True)
+            name = StringField()
+
+        class Group(Document):
+            members = ListField(ReferenceField(User, dbref=False))
+
+        User.drop_collection()
+        Group.drop_collection()
+
+        user = User(my_id=1, name='user 1').save()
+
+        Group(members=User.objects).save()
+        group = Group.objects.first()
+
+        self.assertEqual(Group._get_collection().find_one()['members'], [1])
+        self.assertEqual(group.members, [user])
+
     def test_handle_old_style_references(self):
         """Ensure that DBRef items in ListFields are dereferenced.
         """
@@ -128,7 +160,7 @@ class FieldTest(unittest.TestCase):
         User.drop_collection()
         Group.drop_collection()
 
-        for i in xrange(1, 26):
+        for i in range(1, 26):
             user = User(name='user %s' % i)
             user.save()
 
@@ -170,6 +202,10 @@ class FieldTest(unittest.TestCase):
         raw_data = Group._get_collection().find_one()
         self.assertTrue(isinstance(raw_data['author'], DBRef))
         self.assertTrue(isinstance(raw_data['members'][0], DBRef))
+        group = Group.objects.first()
+
+        self.assertEqual(group.author, user)
+        self.assertEqual(group.members, [user])
 
         # Migrate the model definition
         class Group(Document):
@@ -178,8 +214,9 @@ class FieldTest(unittest.TestCase):
 
         # Migrate the data
         for g in Group.objects():
-            g.author = g.author
+            # Explicitly mark as changed so resets
-            g.members = g.members
+            g._mark_as_changed('author')
+            g._mark_as_changed('members')
             g.save()
 
         group = Group.objects.first()
@@ -187,8 +224,8 @@ class FieldTest(unittest.TestCase):
         self.assertEqual(group.members, [user])
 
         raw_data = Group._get_collection().find_one()
-        self.assertTrue(isinstance(raw_data['author'], basestring))
+        self.assertTrue(isinstance(raw_data['author'], ObjectId))
-        self.assertTrue(isinstance(raw_data['members'][0], basestring))
+        self.assertTrue(isinstance(raw_data['members'][0], ObjectId))
 
     def test_recursive_reference(self):
         """Ensure that ReferenceFields can reference their own documents.
@@ -256,9 +293,38 @@ class FieldTest(unittest.TestCase):
                 self.assertEqual(employee.friends, friends)
                 self.assertEqual(q, 2)
 
+    def test_list_of_lists_of_references(self):
+
+        class User(Document):
+            name = StringField()
+
+        class Post(Document):
+            user_lists = ListField(ListField(ReferenceField(User)))
+
+        class SimpleList(Document):
+            users = ListField(ReferenceField(User))
+
+        User.drop_collection()
+        Post.drop_collection()
+        SimpleList.drop_collection()
+
+        u1 = User.objects.create(name='u1')
+        u2 = User.objects.create(name='u2')
+        u3 = User.objects.create(name='u3')
+
+        SimpleList.objects.create(users=[u1, u2, u3])
+        self.assertEqual(SimpleList.objects.all()[0].users, [u1, u2, u3])
+
+        Post.objects.create(user_lists=[[u1, u2], [u3]])
+        self.assertEqual(Post.objects.all()[0].user_lists, [[u1, u2], [u3]])
+
     def test_circular_reference(self):
         """Ensure you can handle circular references
         """
+        class Relation(EmbeddedDocument):
+            name = StringField()
+            person = ReferenceField('Person')
+
         class Person(Document):
             name = StringField()
             relations = ListField(EmbeddedDocumentField('Relation'))
@@ -266,10 +332,6 @@ class FieldTest(unittest.TestCase):
             def __repr__(self):
                 return "<Person: %s>" % self.name
 
-        class Relation(EmbeddedDocument):
-            name = StringField()
-            person = ReferenceField('Person')
-
         Person.drop_collection()
         mother = Person(name="Mother")
         daughter = Person(name="Daughter")
@@ -330,14 +392,10 @@ class FieldTest(unittest.TestCase):
                 return "<Person: %s>" % self.name
 
         Person.drop_collection()
-        paul = Person(name="Paul")
+        paul = Person(name="Paul").save()
-        paul.save()
+        maria = Person(name="Maria").save()
-        maria = Person(name="Maria")
+        julia = Person(name='Julia').save()
-        maria.save()
+        anna = Person(name='Anna').save()
-        julia = Person(name='Julia')
-        julia.save()
-        anna = Person(name='Anna')
-        anna.save()
 
         paul.other.friends = [maria, julia, anna]
         paul.other.name = "Paul's friends"
@@ -380,7 +438,7 @@ class FieldTest(unittest.TestCase):
         Group.drop_collection()
 
         members = []
-        for i in xrange(1, 51):
+        for i in range(1, 51):
             a = UserA(name='User A %s' % i)
             a.save()
 
@@ -471,7 +529,7 @@ class FieldTest(unittest.TestCase):
         Group.drop_collection()
 
         members = []
-        for i in xrange(1, 51):
+        for i in range(1, 51):
             a = UserA(name='User A %s' % i)
             a.save()
 
@@ -554,15 +612,15 @@ class FieldTest(unittest.TestCase):
         Group.drop_collection()
 
         members = []
-        for i in xrange(1, 51):
+        for i in range(1, 51):
             user = User(name='user %s' % i)
             user.save()
             members.append(user)
 
-        group = Group(members=dict([(str(u.id), u) for u in members]))
+        group = Group(members={str(u.id): u for u in members})
         group.save()
 
-        group = Group(members=dict([(str(u.id), u) for u in members]))
+        group = Group(members={str(u.id): u for u in members})
         group.save()
 
         with query_counter() as q:
@@ -627,7 +685,7 @@ class FieldTest(unittest.TestCase):
         Group.drop_collection()
 
         members = []
-        for i in xrange(1, 51):
+        for i in range(1, 51):
             a = UserA(name='User A %s' % i)
             a.save()
 
@@ -639,9 +697,9 @@ class FieldTest(unittest.TestCase):
 
             members += [a, b, c]
 
-        group = Group(members=dict([(str(u.id), u) for u in members]))
+        group = Group(members={str(u.id): u for u in members})
         group.save()
-        group = Group(members=dict([(str(u.id), u) for u in members]))
+        group = Group(members={str(u.id): u for u in members})
         group.save()
 
         with query_counter() as q:
@@ -723,16 +781,16 @@ class FieldTest(unittest.TestCase):
         Group.drop_collection()
 
         members = []
-        for i in xrange(1, 51):
+        for i in range(1, 51):
             a = UserA(name='User A %s' % i)
             a.save()
 
             members += [a]
 
-        group = Group(members=dict([(str(u.id), u) for u in members]))
+        group = Group(members={str(u.id): u for u in members})
         group.save()
 
-        group = Group(members=dict([(str(u.id), u) for u in members]))
+        group = Group(members={str(u.id): u for u in members})
         group.save()
 
         with query_counter() as q:
@@ -806,7 +864,7 @@ class FieldTest(unittest.TestCase):
         Group.drop_collection()
 
         members = []
-        for i in xrange(1, 51):
+        for i in range(1, 51):
             a = UserA(name='User A %s' % i)
             a.save()
 
@@ -818,9 +876,9 @@ class FieldTest(unittest.TestCase):
 
             members += [a, b, c]
 
-        group = Group(members=dict([(str(u.id), u) for u in members]))
+        group = Group(members={str(u.id): u for u in members})
         group.save()
-        group = Group(members=dict([(str(u.id), u) for u in members]))
+        group = Group(members={str(u.id): u for u in members})
         group.save()
 
         with query_counter() as q:
@@ -892,6 +950,8 @@ class FieldTest(unittest.TestCase):
 
         class Asset(Document):
             name = StringField(max_length=250, required=True)
+            path = StringField()
+            title = StringField()
             parent = GenericReferenceField(default=None)
             parents = ListField(GenericReferenceField())
             children = ListField(GenericReferenceField())
@@ -969,6 +1029,43 @@ class FieldTest(unittest.TestCase):
         self.assertEqual(type(foo.bar), Bar)
         self.assertEqual(type(foo.baz), Baz)
 
+
+    def test_document_reload_reference_integrity(self):
+        """
+        Ensure reloading a document with multiple similar id
+        in different collections doesn't mix them.
+        """
+        class Topic(Document):
+            id = IntField(primary_key=True)
+        class User(Document):
+            id = IntField(primary_key=True)
+            name = StringField()
+        class Message(Document):
+            id = IntField(primary_key=True)
+            topic = ReferenceField(Topic)
+            author = ReferenceField(User)
+
+        Topic.drop_collection()
+        User.drop_collection()
+        Message.drop_collection()
+
+        # All objects share the same id, but each in a different collection
+        topic = Topic(id=1).save()
+        user = User(id=1, name='user-name').save()
+        Message(id=1, topic=topic, author=user).save()
+
+        concurrent_change_user = User.objects.get(id=1)
+        concurrent_change_user.name = 'new-name'
+        concurrent_change_user.save()
+        self.assertNotEqual(user.name, 'new-name')
+
+        msg = Message.objects.get(id=1)
+        msg.reload()
+        self.assertEqual(msg.topic, topic)
+        self.assertEqual(msg.author, user)
+        self.assertEqual(msg.author.name, 'new-name')
+
+
     def test_list_lookup_not_checked_in_map(self):
         """Ensure we dereference list data correctly
         """
@@ -990,3 +1087,205 @@ class FieldTest(unittest.TestCase):
         msg = Message.objects.get(id=1)
         self.assertEqual(0, msg.comments[0].id)
         self.assertEqual(1, msg.comments[1].id)
+
+    def test_list_item_dereference_dref_false_save_doesnt_cause_extra_queries(self):
+        """Ensure that DBRef items in ListFields are dereferenced.
+        """
+        class User(Document):
+            name = StringField()
+
+        class Group(Document):
+            name = StringField()
+            members = ListField(ReferenceField(User, dbref=False))
+
+        User.drop_collection()
+        Group.drop_collection()
+
+        for i in range(1, 51):
+            User(name='user %s' % i).save()
+
+        Group(name="Test", members=User.objects).save()
+
+        with query_counter() as q:
+            self.assertEqual(q, 0)
+
+            group_obj = Group.objects.first()
+            self.assertEqual(q, 1)
+
+            group_obj.name = "new test"
+            group_obj.save()
+
+            self.assertEqual(q, 2)
+
+    def test_list_item_dereference_dref_true_save_doesnt_cause_extra_queries(self):
+        """Ensure that DBRef items in ListFields are dereferenced.
+        """
+        class User(Document):
+            name = StringField()
+
+        class Group(Document):
+            name = StringField()
+            members = ListField(ReferenceField(User, dbref=True))
+
+        User.drop_collection()
+        Group.drop_collection()
+
+        for i in range(1, 51):
+            User(name='user %s' % i).save()
+
+        Group(name="Test", members=User.objects).save()
+
+        with query_counter() as q:
+            self.assertEqual(q, 0)
+
+            group_obj = Group.objects.first()
+            self.assertEqual(q, 1)
+
+            group_obj.name = "new test"
+            group_obj.save()
+
+            self.assertEqual(q, 2)
+
+    def test_generic_reference_save_doesnt_cause_extra_queries(self):
+
+        class UserA(Document):
+            name = StringField()
+
+        class UserB(Document):
+            name = StringField()
+
+        class UserC(Document):
+            name = StringField()
+
+        class Group(Document):
+            name = StringField()
+            members = ListField(GenericReferenceField())
+
+        UserA.drop_collection()
+        UserB.drop_collection()
+        UserC.drop_collection()
+        Group.drop_collection()
+
+        members = []
+        for i in range(1, 51):
+            a = UserA(name='User A %s' % i).save()
+            b = UserB(name='User B %s' % i).save()
+            c = UserC(name='User C %s' % i).save()
+
+            members += [a, b, c]
+
+        Group(name="test", members=members).save()
+
+        with query_counter() as q:
+            self.assertEqual(q, 0)
+
+            group_obj = Group.objects.first()
+            self.assertEqual(q, 1)
+
+            group_obj.name = "new test"
+            group_obj.save()
+
+            self.assertEqual(q, 2)
+
+    def test_objectid_reference_across_databases(self):
+        # mongoenginetest - Is default connection alias from setUp()
+        # Register Aliases
+        register_connection('testdb-1', 'mongoenginetest2')
+
+        class User(Document):
+            name = StringField()
+            meta = {"db_alias": "testdb-1"}
+
+        class Book(Document):
+            name = StringField()
+            author = ReferenceField(User)
+
+        # Drops
+        User.drop_collection()
+        Book.drop_collection()
+
+        user = User(name="Ross").save()
+        Book(name="MongoEngine for pros", author=user).save()
+
+        # Can't use query_counter across databases - so test the _data object
+        book = Book.objects.first()
+        self.assertFalse(isinstance(book._data['author'], User))
+
+        book.select_related()
+        self.assertTrue(isinstance(book._data['author'], User))
+
+    def test_non_ascii_pk(self):
+        """
+        Ensure that dbref conversion to string does not fail when
+        non-ascii characters are used in primary key
+        """
+        class Brand(Document):
+            title = StringField(max_length=255, primary_key=True)
+
+        class BrandGroup(Document):
+            title = StringField(max_length=255, primary_key=True)
+            brands = ListField(ReferenceField("Brand", dbref=True))
+
+        Brand.drop_collection()
+        BrandGroup.drop_collection()
+
+        brand1 = Brand(title="Moschino").save()
+        brand2 = Brand(title=u"Денис Симачёв").save()
+
+        BrandGroup(title="top_brands", brands=[brand1, brand2]).save()
+        brand_groups = BrandGroup.objects().all()
+
+        self.assertEqual(2, len([brand for bg in brand_groups for brand in bg.brands]))
+
+    def test_dereferencing_embedded_listfield_referencefield(self):
+        class Tag(Document):
+            meta = {'collection': 'tags'}
+            name = StringField()
+
+        class Post(EmbeddedDocument):
+            body = StringField()
+            tags = ListField(ReferenceField("Tag", dbref=True))
+
+        class Page(Document):
+            meta = {'collection': 'pages'}
+            tags = ListField(ReferenceField("Tag", dbref=True))
+            posts = ListField(EmbeddedDocumentField(Post))
+
+        Tag.drop_collection()
+        Page.drop_collection()
+
+        tag = Tag(name='test').save()
+        post = Post(body='test body', tags=[tag])
+        Page(tags=[tag], posts=[post]).save()
+
+        page = Page.objects.first()
+        self.assertEqual(page.tags[0], page.posts[0].tags[0])
+
+    def test_select_related_follows_embedded_referencefields(self):
+
+        class Song(Document):
+            title = StringField()
+
+        class PlaylistItem(EmbeddedDocument):
+            song = ReferenceField("Song")
+
+        class Playlist(Document):
+            items = ListField(EmbeddedDocumentField("PlaylistItem"))
+
+        Playlist.drop_collection()
+        Song.drop_collection()
+
+        songs = [Song.objects.create(title="song %d" % i) for i in range(3)]
+        items = [PlaylistItem(song=song) for song in songs]
+        playlist = Playlist.objects.create(items=items)
+
+        with query_counter() as q:
+            self.assertEqual(q, 0)
+
+            playlist = Playlist.objects.first().select_related()
+            songs = [item.song for item in playlist.items]
+
+            self.assertEqual(q, 2)
+
+if __name__ == '__main__':
+    unittest.main()

tests/test_django.py

@@ -1,122 +0,0 @@
-from __future__ import with_statement
-import unittest
-from nose.plugins.skip import SkipTest
-from mongoengine.python_support import PY3
-from mongoengine import *
-
-try:
-    from mongoengine.django.shortcuts import get_document_or_404
-
-    from django.http import Http404
-    from django.template import Context, Template
-    from django.conf import settings
-    from django.core.paginator import Paginator
-
-    settings.configure()
-
-    from django.contrib.sessions.tests import SessionTestsMixin
-    from mongoengine.django.sessions import SessionStore, MongoSession
-except Exception, err:
-    if PY3:
-        SessionTestsMixin = type  # dummy value so no error
-        SessionStore = None  # dummy value so no error
-    else:
-        raise err
-
-
-class QuerySetTest(unittest.TestCase):
-
-    def setUp(self):
-        if PY3:
-            raise SkipTest('django does not have Python 3 support')
-        connect(db='mongoenginetest')
-
-        class Person(Document):
-            name = StringField()
-            age = IntField()
-        self.Person = Person
-
-    def test_order_by_in_django_template(self):
-        """Ensure that QuerySets are properly ordered in Django template.
-        """
-        self.Person.drop_collection()
-
-        self.Person(name="A", age=20).save()
-        self.Person(name="D", age=10).save()
-        self.Person(name="B", age=40).save()
-        self.Person(name="C", age=30).save()
-
-        t = Template("{% for o in ol %}{{ o.name }}-{{ o.age }}:{% endfor %}")
-
-        d = {"ol": self.Person.objects.order_by('-name')}
-        self.assertEqual(t.render(Context(d)), u'D-10:C-30:B-40:A-20:')
-        d = {"ol": self.Person.objects.order_by('+name')}
-        self.assertEqual(t.render(Context(d)), u'A-20:B-40:C-30:D-10:')
-        d = {"ol": self.Person.objects.order_by('-age')}
-        self.assertEqual(t.render(Context(d)), u'B-40:C-30:A-20:D-10:')
-        d = {"ol": self.Person.objects.order_by('+age')}
-        self.assertEqual(t.render(Context(d)), u'D-10:A-20:C-30:B-40:')
-
-        self.Person.drop_collection()
-
-    def test_q_object_filter_in_template(self):
-
-        self.Person.drop_collection()
-
-        self.Person(name="A", age=20).save()
-        self.Person(name="D", age=10).save()
-        self.Person(name="B", age=40).save()
-        self.Person(name="C", age=30).save()
-
-        t = Template("{% for o in ol %}{{ o.name }}-{{ o.age }}:{% endfor %}")
-
-        d = {"ol": self.Person.objects.filter(Q(age=10) | Q(name="C"))}
-        self.assertEqual(t.render(Context(d)), 'D-10:C-30:')
-
-        # Check double rendering doesn't throw an error
-        self.assertEqual(t.render(Context(d)), 'D-10:C-30:')
-
-    def test_get_document_or_404(self):
-        p = self.Person(name="G404")
-        p.save()
-
-        self.assertRaises(Http404, get_document_or_404, self.Person, pk='1234')
-        self.assertEqual(p, get_document_or_404(self.Person, pk=p.pk))
-
-    def test_pagination(self):
-        """Ensure that Pagination works as expected
-        """
-        class Page(Document):
-            name = StringField()
-
-        Page.drop_collection()
-
-        for i in xrange(1, 11):
-            Page(name=str(i)).save()
-
-        paginator = Paginator(Page.objects.all(), 2)
-
-        t = Template("{% for i in page.object_list  %}{{ i.name }}:{% endfor %}")
-        for p in paginator.page_range:
-            d = {"page": paginator.page(p)}
-            end = p * 2
-            start = end - 1
-            self.assertEqual(t.render(Context(d)), u'%d:%d:' % (start, end))
-
-
-
-class MongoDBSessionTest(SessionTestsMixin, unittest.TestCase):
-    backend = SessionStore
-
-    def setUp(self):
-        if PY3:
-            raise SkipTest('django does not have Python 3 support')
-        connect(db='mongoenginetest')
-        MongoSession.drop_collection()
-        super(MongoDBSessionTest, self).setUp()
-
-    def test_first_save(self):
-        session = SessionStore()
-        session['test'] = True
-        session.save()
-        self.assertTrue('test' in session)

tests/test_dynamic_document.py

@@ -1,533 +0,0 @@
-import unittest
-
-from mongoengine import *
-from mongoengine.connection import get_db
-
-
-class DynamicDocTest(unittest.TestCase):
-
-    def setUp(self):
-        connect(db='mongoenginetest')
-        self.db = get_db()
-
-        class Person(DynamicDocument):
-            name = StringField()
-            meta = {'allow_inheritance': True}
-
-        Person.drop_collection()
-
-        self.Person = Person
-
-    def test_simple_dynamic_document(self):
-        """Ensures simple dynamic documents are saved correctly"""
-
-        p = self.Person()
-        p.name = "James"
-        p.age = 34
-
-        self.assertEqual(p.to_mongo(),
-            {"_types": ["Person"], "_cls": "Person",
-             "name": "James", "age": 34}
-        )
-
-        p.save()
-
-        self.assertEqual(self.Person.objects.first().age, 34)
-
-        # Confirm no changes to self.Person
-        self.assertFalse(hasattr(self.Person, 'age'))
-
-    def test_dynamic_document_delta(self):
-        """Ensures simple dynamic documents can delta correctly"""
-        p = self.Person(name="James", age=34)
-        self.assertEqual(p._delta(), ({'_types': ['Person'], 'age': 34, 'name': 'James', '_cls': 'Person'}, {}))
-
-        p.doc = 123
-        del(p.doc)
-        self.assertEqual(p._delta(), ({'_types': ['Person'], 'age': 34, 'name': 'James', '_cls': 'Person'}, {'doc': 1}))
-
-    def test_change_scope_of_variable(self):
-        """Test changing the scope of a dynamic field has no adverse effects"""
-        p = self.Person()
-        p.name = "Dean"
-        p.misc = 22
-        p.save()
-
-        p = self.Person.objects.get()
-        p.misc = {'hello': 'world'}
-        p.save()
-
-        p = self.Person.objects.get()
-        self.assertEqual(p.misc, {'hello': 'world'})
-
-    def test_delete_dynamic_field(self):
-        """Test deleting a dynamic field works"""
-        self.Person.drop_collection()
-        p = self.Person()
-        p.name = "Dean"
-        p.misc = 22
-        p.save()
-
-        p = self.Person.objects.get()
-        p.misc = {'hello': 'world'}
-        p.save()
-
-        p = self.Person.objects.get()
-        self.assertEqual(p.misc, {'hello': 'world'})
-        collection = self.db[self.Person._get_collection_name()]
-        obj = collection.find_one()
-        self.assertEqual(sorted(obj.keys()), ['_cls', '_id', '_types', 'misc', 'name'])
-
-        del(p.misc)
-        p.save()
-
-        p = self.Person.objects.get()
-        self.assertFalse(hasattr(p, 'misc'))
-
-        obj = collection.find_one()
-        self.assertEqual(sorted(obj.keys()), ['_cls', '_id', '_types', 'name'])
-
-    def test_dynamic_document_queries(self):
-        """Ensure we can query dynamic fields"""
-        p = self.Person()
-        p.name = "Dean"
-        p.age = 22
-        p.save()
-
-        self.assertEqual(1, self.Person.objects(age=22).count())
-        p = self.Person.objects(age=22)
-        p = p.get()
-        self.assertEqual(22, p.age)
-
-    def test_complex_dynamic_document_queries(self):
-        class Person(DynamicDocument):
-            name = StringField()
-
-        Person.drop_collection()
-
-        p = Person(name="test")
-        p.age = "ten"
-        p.save()
-
-        p1 = Person(name="test1")
-        p1.age = "less then ten and a half"
-        p1.save()
-
-        p2 = Person(name="test2")
-        p2.age = 10
-        p2.save()
-
-        self.assertEqual(Person.objects(age__icontains='ten').count(), 2)
-        self.assertEqual(Person.objects(age__gte=10).count(), 1)
-
-    def test_complex_data_lookups(self):
-        """Ensure you can query dynamic document dynamic fields"""
-        p = self.Person()
-        p.misc = {'hello': 'world'}
-        p.save()
-
-        self.assertEqual(1, self.Person.objects(misc__hello='world').count())
-
-    def test_inheritance(self):
-        """Ensure that dynamic document plays nice with inheritance"""
-        class Employee(self.Person):
-            salary = IntField()
-
-        Employee.drop_collection()
-
-        self.assertTrue('name' in Employee._fields)
-        self.assertTrue('salary' in Employee._fields)
-        self.assertEqual(Employee._get_collection_name(),
-                         self.Person._get_collection_name())
-
-        joe_bloggs = Employee()
-        joe_bloggs.name = "Joe Bloggs"
-        joe_bloggs.salary = 10
-        joe_bloggs.age = 20
-        joe_bloggs.save()
-
-        self.assertEqual(1, self.Person.objects(age=20).count())
-        self.assertEqual(1, Employee.objects(age=20).count())
-
-        joe_bloggs = self.Person.objects.first()
-        self.assertTrue(isinstance(joe_bloggs, Employee))
-
-    def test_embedded_dynamic_document(self):
-        """Test dynamic embedded documents"""
-        class Embedded(DynamicEmbeddedDocument):
-            pass
-
-        class Doc(DynamicDocument):
-            pass
-
-        Doc.drop_collection()
-        doc = Doc()
-
-        embedded_1 = Embedded()
-        embedded_1.string_field = 'hello'
-        embedded_1.int_field = 1
-        embedded_1.dict_field = {'hello': 'world'}
-        embedded_1.list_field = ['1', 2, {'hello': 'world'}]
-        doc.embedded_field = embedded_1
-
-        self.assertEqual(doc.to_mongo(), {"_types": ['Doc'], "_cls": "Doc",
-            "embedded_field": {
-                "_types": ['Embedded'], "_cls": "Embedded",
-                "string_field": "hello",
-                "int_field": 1,
-                "dict_field": {"hello": "world"},
-                "list_field": ['1', 2, {'hello': 'world'}]
-            }
-        })
-        doc.save()
-
-        doc = Doc.objects.first()
-        self.assertEqual(doc.embedded_field.__class__, Embedded)
-        self.assertEqual(doc.embedded_field.string_field, "hello")
-        self.assertEqual(doc.embedded_field.int_field, 1)
-        self.assertEqual(doc.embedded_field.dict_field, {'hello': 'world'})
-        self.assertEqual(doc.embedded_field.list_field, ['1', 2, {'hello': 'world'}])
-
-    def test_complex_embedded_documents(self):
-        """Test complex dynamic embedded documents setups"""
-        class Embedded(DynamicEmbeddedDocument):
-            pass
-
-        class Doc(DynamicDocument):
-            pass
-
-        Doc.drop_collection()
-        doc = Doc()
-
-        embedded_1 = Embedded()
-        embedded_1.string_field = 'hello'
-        embedded_1.int_field = 1
-        embedded_1.dict_field = {'hello': 'world'}
-
-        embedded_2 = Embedded()
-        embedded_2.string_field = 'hello'
-        embedded_2.int_field = 1
-        embedded_2.dict_field = {'hello': 'world'}
-        embedded_2.list_field = ['1', 2, {'hello': 'world'}]
-
-        embedded_1.list_field = ['1', 2, embedded_2]
-        doc.embedded_field = embedded_1
-
-        self.assertEqual(doc.to_mongo(), {"_types": ['Doc'], "_cls": "Doc",
-            "embedded_field": {
-                "_types": ['Embedded'], "_cls": "Embedded",
-                "string_field": "hello",
-                "int_field": 1,
-                "dict_field": {"hello": "world"},
-                "list_field": ['1', 2,
-                    {"_types": ['Embedded'], "_cls": "Embedded",
-                    "string_field": "hello",
-                    "int_field": 1,
-                    "dict_field": {"hello": "world"},
-                    "list_field": ['1', 2, {'hello': 'world'}]}
-                ]
-            }
-        })
-        doc.save()
-        doc = Doc.objects.first()
-        self.assertEqual(doc.embedded_field.__class__, Embedded)
-        self.assertEqual(doc.embedded_field.string_field, "hello")
-        self.assertEqual(doc.embedded_field.int_field, 1)
-        self.assertEqual(doc.embedded_field.dict_field, {'hello': 'world'})
-        self.assertEqual(doc.embedded_field.list_field[0], '1')
-        self.assertEqual(doc.embedded_field.list_field[1], 2)
-
-        embedded_field = doc.embedded_field.list_field[2]
-
-        self.assertEqual(embedded_field.__class__, Embedded)
-        self.assertEqual(embedded_field.string_field, "hello")
-        self.assertEqual(embedded_field.int_field, 1)
-        self.assertEqual(embedded_field.dict_field, {'hello': 'world'})
-        self.assertEqual(embedded_field.list_field, ['1', 2, {'hello': 'world'}])
-
-    def test_delta_for_dynamic_documents(self):
-        p = self.Person()
-        p.name = "Dean"
-        p.age = 22
-        p.save()
-
-        p.age = 24
-        self.assertEqual(p.age, 24)
-        self.assertEqual(p._get_changed_fields(), ['age'])
-        self.assertEqual(p._delta(), ({'age': 24}, {}))
-
-        p = self.Person.objects(age=22).get()
-        p.age = 24
-        self.assertEqual(p.age, 24)
-        self.assertEqual(p._get_changed_fields(), ['age'])
-        self.assertEqual(p._delta(), ({'age': 24}, {}))
-
-        p.save()
-        self.assertEqual(1, self.Person.objects(age=24).count())
-
-    def test_delta(self):
-
-        class Doc(DynamicDocument):
-            pass
-
-        Doc.drop_collection()
-        doc = Doc()
-        doc.save()
-
-        doc = Doc.objects.first()
-        self.assertEqual(doc._get_changed_fields(), [])
-        self.assertEqual(doc._delta(), ({}, {}))
-
-        doc.string_field = 'hello'
-        self.assertEqual(doc._get_changed_fields(), ['string_field'])
-        self.assertEqual(doc._delta(), ({'string_field': 'hello'}, {}))
-
-        doc._changed_fields = []
-        doc.int_field = 1
-        self.assertEqual(doc._get_changed_fields(), ['int_field'])
-        self.assertEqual(doc._delta(), ({'int_field': 1}, {}))
-
-        doc._changed_fields = []
-        dict_value = {'hello': 'world', 'ping': 'pong'}
-        doc.dict_field = dict_value
-        self.assertEqual(doc._get_changed_fields(), ['dict_field'])
-        self.assertEqual(doc._delta(), ({'dict_field': dict_value}, {}))
-
-        doc._changed_fields = []
-        list_value = ['1', 2, {'hello': 'world'}]
-        doc.list_field = list_value
-        self.assertEqual(doc._get_changed_fields(), ['list_field'])
-        self.assertEqual(doc._delta(), ({'list_field': list_value}, {}))
-
-        # Test unsetting
-        doc._changed_fields = []
-        doc.dict_field = {}
-        self.assertEqual(doc._get_changed_fields(), ['dict_field'])
-        self.assertEqual(doc._delta(), ({}, {'dict_field': 1}))
-
-        doc._changed_fields = []
-        doc.list_field = []
-        self.assertEqual(doc._get_changed_fields(), ['list_field'])
-        self.assertEqual(doc._delta(), ({}, {'list_field': 1}))
-
-    def test_delta_recursive(self):
-        """Testing deltaing works with dynamic documents"""
-        class Embedded(DynamicEmbeddedDocument):
-            pass
-
-        class Doc(DynamicDocument):
-            pass
-
-        Doc.drop_collection()
-        doc = Doc()
-        doc.save()
-
-        doc = Doc.objects.first()
-        self.assertEqual(doc._get_changed_fields(), [])
-        self.assertEqual(doc._delta(), ({}, {}))
-
-        embedded_1 = Embedded()
-        embedded_1.string_field = 'hello'
-        embedded_1.int_field = 1
-        embedded_1.dict_field = {'hello': 'world'}
-        embedded_1.list_field = ['1', 2, {'hello': 'world'}]
-        doc.embedded_field = embedded_1
-
-        self.assertEqual(doc._get_changed_fields(), ['embedded_field'])
-
-        embedded_delta = {
-            'string_field': 'hello',
-            'int_field': 1,
-            'dict_field': {'hello': 'world'},
-            'list_field': ['1', 2, {'hello': 'world'}]
-        }
-        self.assertEqual(doc.embedded_field._delta(), (embedded_delta, {}))
-        embedded_delta.update({
-            '_types': ['Embedded'],
-            '_cls': 'Embedded',
-        })
-        self.assertEqual(doc._delta(), ({'embedded_field': embedded_delta}, {}))
-
-        doc.save()
-        doc.reload()
-
-        doc.embedded_field.dict_field = {}
-        self.assertEqual(doc._get_changed_fields(), ['embedded_field.dict_field'])
-        self.assertEqual(doc.embedded_field._delta(), ({}, {'dict_field': 1}))
-
-        self.assertEqual(doc._delta(), ({}, {'embedded_field.dict_field': 1}))
-        doc.save()
-        doc.reload()
-
-        doc.embedded_field.list_field = []
-        self.assertEqual(doc._get_changed_fields(), ['embedded_field.list_field'])
-        self.assertEqual(doc.embedded_field._delta(), ({}, {'list_field': 1}))
-        self.assertEqual(doc._delta(), ({}, {'embedded_field.list_field': 1}))
-        doc.save()
-        doc.reload()
-
-        embedded_2 = Embedded()
-        embedded_2.string_field = 'hello'
-        embedded_2.int_field = 1
-        embedded_2.dict_field = {'hello': 'world'}
-        embedded_2.list_field = ['1', 2, {'hello': 'world'}]
-
-        doc.embedded_field.list_field = ['1', 2, embedded_2]
-        self.assertEqual(doc._get_changed_fields(), ['embedded_field.list_field'])
-        self.assertEqual(doc.embedded_field._delta(), ({
-            'list_field': ['1', 2, {
-                '_cls': 'Embedded',
-                '_types': ['Embedded'],
-                'string_field': 'hello',
-                'dict_field': {'hello': 'world'},
-                'int_field': 1,
-                'list_field': ['1', 2, {'hello': 'world'}],
-            }]
-        }, {}))
-
-        self.assertEqual(doc._delta(), ({
-            'embedded_field.list_field': ['1', 2, {
-                '_cls': 'Embedded',
-                 '_types': ['Embedded'],
-                 'string_field': 'hello',
-                 'dict_field': {'hello': 'world'},
-                 'int_field': 1,
-                 'list_field': ['1', 2, {'hello': 'world'}],
-            }]
-        }, {}))
-        doc.save()
-        doc.reload()
-
-        self.assertEqual(doc.embedded_field.list_field[2]._changed_fields, [])
-        self.assertEqual(doc.embedded_field.list_field[0], '1')
-        self.assertEqual(doc.embedded_field.list_field[1], 2)
-        for k in doc.embedded_field.list_field[2]._fields:
-            self.assertEqual(doc.embedded_field.list_field[2][k], embedded_2[k])
-
-        doc.embedded_field.list_field[2].string_field = 'world'
-        self.assertEqual(doc._get_changed_fields(), ['embedded_field.list_field.2.string_field'])
-        self.assertEqual(doc.embedded_field._delta(), ({'list_field.2.string_field': 'world'}, {}))
-        self.assertEqual(doc._delta(), ({'embedded_field.list_field.2.string_field': 'world'}, {}))
-        doc.save()
-        doc.reload()
-        self.assertEqual(doc.embedded_field.list_field[2].string_field, 'world')
-
-        # Test multiple assignments
-        doc.embedded_field.list_field[2].string_field = 'hello world'
-        doc.embedded_field.list_field[2] = doc.embedded_field.list_field[2]
-        self.assertEqual(doc._get_changed_fields(), ['embedded_field.list_field'])
-        self.assertEqual(doc.embedded_field._delta(), ({
-            'list_field': ['1', 2, {
-            '_types': ['Embedded'],
-            '_cls': 'Embedded',
-            'string_field': 'hello world',
-            'int_field': 1,
-            'list_field': ['1', 2, {'hello': 'world'}],
-            'dict_field': {'hello': 'world'}}]}, {}))
-        self.assertEqual(doc._delta(), ({
-            'embedded_field.list_field': ['1', 2, {
-                '_types': ['Embedded'],
-                '_cls': 'Embedded',
-                'string_field': 'hello world',
-                'int_field': 1,
-                'list_field': ['1', 2, {'hello': 'world'}],
-                'dict_field': {'hello': 'world'}}
-            ]}, {}))
-        doc.save()
-        doc.reload()
-        self.assertEqual(doc.embedded_field.list_field[2].string_field, 'hello world')
-
-        # Test list native methods
-        doc.embedded_field.list_field[2].list_field.pop(0)
-        self.assertEqual(doc._delta(), ({'embedded_field.list_field.2.list_field': [2, {'hello': 'world'}]}, {}))
-        doc.save()
-        doc.reload()
-
-        doc.embedded_field.list_field[2].list_field.append(1)
-        self.assertEqual(doc._delta(), ({'embedded_field.list_field.2.list_field': [2, {'hello': 'world'}, 1]}, {}))
-        doc.save()
-        doc.reload()
-        self.assertEqual(doc.embedded_field.list_field[2].list_field, [2, {'hello': 'world'}, 1])
-
-        doc.embedded_field.list_field[2].list_field.sort(key=str)# use str as a key to allow comparing uncomperable types
-        doc.save()
-        doc.reload()
-        self.assertEqual(doc.embedded_field.list_field[2].list_field, [1, 2, {'hello': 'world'}])
-
-        del(doc.embedded_field.list_field[2].list_field[2]['hello'])
-        self.assertEqual(doc._delta(), ({'embedded_field.list_field.2.list_field': [1, 2, {}]}, {}))
-        doc.save()
-        doc.reload()
-
-        del(doc.embedded_field.list_field[2].list_field)
-        self.assertEqual(doc._delta(), ({}, {'embedded_field.list_field.2.list_field': 1}))
-
-        doc.save()
-        doc.reload()
-
-        doc.dict_field = {'embedded': embedded_1}
-        doc.save()
-        doc.reload()
-
-        doc.dict_field['embedded'].string_field = 'Hello World'
-        self.assertEqual(doc._get_changed_fields(), ['dict_field.embedded.string_field'])
-        self.assertEqual(doc._delta(), ({'dict_field.embedded.string_field': 'Hello World'}, {}))
-
-    def test_indexes(self):
-        """Ensure that indexes are used when meta[indexes] is specified.
-        """
-        class BlogPost(DynamicDocument):
-            meta = {
-                'indexes': [
-                    '-date',
-                    ('category', '-date')
-                ],
-            }
-
-        BlogPost.drop_collection()
-
-        info = BlogPost.objects._collection.index_information()
-        # _id, '-date', ('cat', 'date')
-        # NB: there is no index on _types by itself, since
-        # the indices on -date and tags will both contain
-        # _types as first element in the key
-        self.assertEqual(len(info), 3)
-
-        # Indexes are lazy so use list() to perform query
-        list(BlogPost.objects)
-        info = BlogPost.objects._collection.index_information()
-        info = [value['key'] for key, value in info.iteritems()]
-        self.assertTrue([('_types', 1), ('category', 1), ('date', -1)]
-                        in info)
-        self.assertTrue([('_types', 1), ('date', -1)] in info)
-
-    def test_dynamic_and_embedded(self):
-        """Ensure embedded documents play nicely"""
-
-        class Address(EmbeddedDocument):
-            city = StringField()
-
-        class Person(DynamicDocument):
-            name = StringField()
-            meta = {'allow_inheritance': True}
-
-        Person.drop_collection()
-
-        Person(name="Ross", address=Address(city="London")).save()
-
-        person = Person.objects.first()
-        person.address.city = "Lundenne"
-        person.save()
-
-        self.assertEqual(Person.objects.first().address.city, "Lundenne")
-
-        person = Person.objects.first()
-        person.address = Address(city="Londinium")
-        person.save()
-
-        self.assertEqual(Person.objects.first().address.city, "Londinium")
-
-        person = Person.objects.first()
-        person.age = 35
-        person.save()
-        self.assertEqual(Person.objects.first().age, 35)