add a test with an invalid data type

This reverts commit 7d5caf8368.

.gitignore

@@ -1,4 +1,20 @@
-*.pyc
+.*
-.*.swp
+!.gitignore
+*~
+*.py[co]
+.*.sw[po]
+*.egg
 docs/.build
 docs/_build
+build/
+dist/
+mongoengine.egg-info/
+env/
+.settings
+.project
+.pydevproject
+tests/test_bugfix.py
+htmlcov/
+venv
+venv3
+scratchpad

.install_mongodb_on_travis.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+
+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 precise/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;

.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

@@ -0,0 +1,101 @@
+# 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:
+- 2.7
+- 3.5
+- pypy
+- pypy3
+
+env:
+- MONGODB=2.6 PYMONGO=2.7
+- MONGODB=2.6 PYMONGO=2.8
+- MONGODB=2.6 PYMONGO=3.0
+
+matrix:
+  # Finish the build as soon as one job fails
+  fast_finish: true
+
+  include:
+  - python: 2.7
+    env: MONGODB=2.4 PYMONGO=2.7
+  - python: 2.7
+    env: MONGODB=2.4 PYMONGO=3.0
+  - python: 2.7
+    env: MONGODB=3.0 PYMONGO=3.0
+  - python: 3.5
+    env: MONGODB=2.4 PYMONGO=2.7
+  - python: 3.5
+    env: MONGODB=2.4 PYMONGO=3.0
+  - python: 3.5
+    env: MONGODB=3.0 PYMONGO=3.0
+
+before_install:
+- bash .install_mongodb_on_travis.sh
+
+install:
+- sudo apt-get install python-dev python3-dev libopenjpeg-dev zlib1g-dev libjpeg-turbo8-dev
+  libtiff4-dev libjpeg8-dev libfreetype6-dev liblcms2-dev libwebp-dev tcl8.5-dev tk8.5-dev
+  python-tk
+- 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:
+- 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 dev PyMongo (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 = 3.0"
+    python: 2.7

AUTHORS

@@ -0,0 +1,245 @@
+The PRIMARY AUTHORS are (and/or have been):
+
+Ross Lawley <ross.lawley@gmail.com>
+Harry Marr <harry@hmarr.com>
+Matt Dennewitz <mattdennewitz@gmail.com>
+Deepak Thukral <iapain@yahoo.com>
+Florian Schlachter <flori@n-schlachter.de>
+Steve Challis <steve@stevechallis.com>
+Wilson Júnior <wilsonpjunior@gmail.com>
+Dan Crosta https://github.com/dcrosta
+Laine Herron https://github.com/LaineHerron
+
+CONTRIBUTORS
+
+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:
+
+ * blackbrrr
+ * Florian Schlachter
+ * Vincent Driessen
+ * Steve Challis
+ * flosch
+ * Deepak Thukral
+ * Colin Howe
+ * Wilson Júnior (https://github.com/wpjunior)
+ * Alistair Roche
+ * Dan Crosta
+ * Viktor Kerkez
+ * Stephan Jaekel
+ * Rached Ben Mustapha
+ * Greg Turner
+ * Daniel Hasselrot
+ * Mircea Pasoi
+ * Matt Chisholm
+ * James Punteney
+ * TimothéePeignier
+ * Stuart Rackham
+ * Serge Matveenko
+ * Matt Dennewitz
+ * Don Spaulding
+ * Ales Zoulek
+ * sshwsfc
+ * sib
+ * Samuel Clay
+ * Nick Vlku
+ * martin
+ * Flavio Amieiro
+ * Анхбаяр Лхагвадорж
+ * Zak Johnson
+ * Victor Farazdagi
+ * vandersonmota
+ * Theo Julienne
+ * sp
+ * Slavi Pantaleev
+ * Richard Henry
+ * Nicolas Perriault
+ * Nick Vlku Jr
+ * Michael Henson
+ * Leo Honkanen
+ * kuno
+ * Josh Ourisman
+ * Jaime
+ * Igor Ivanov
+ * Gregg Lind
+ * Gareth Lloyd
+ * Albert Choi
+ * John Arnfield
+ * grubberr
+ * Paul Aliagas
+ * Paul Cunnane
+ * Julien Rebetez
+ * Marc Tamlyn
+ * Karim Allah
+ * Adam Parrish
+ * jpfarias
+ * jonrscott
+ * Alice Zoë Bevan-McGregor (https://github.com/amcgregor/)
+ * Stephen Young
+ * tkloc
+ * aid
+ * yamaneko1212
+ * dave mankoff
+ * Alexander G. Morano
+ * jwilder
+ * Joe Shaw
+ * Adam Flynn
+ * Ankhbayar
+ * Jan Schrewe
+ * David Koblas
+ * Crittercism
+ * Alvin Liang
+ * andrewmlevy
+ * Chris Faulkner
+ * Ashwin Purohit
+ * Shalabh Aggarwal
+ * Chris Williams
+ * Robert Kajic
+ * Jacob Peddicord
+ * Nils Hasenbanck
+ * mostlystatic
+ * Greg Banks
+ * swashbuckler
+ * Adam Reeve
+ * Anthony Nemitz
+ * deignacio
+ * Shaun Duncan
+ * Meir Kriheli
+ * Andrey Fedoseev
+ * aparajita
+ * Tristan Escalada
+ * Alexander Koshelev
+ * Jaime Irurzun
+ * Alexandre González
+ * Thomas Steinacher
+ * Tommi Komulainen
+ * Peter Landry
+ * biszkoptwielki
+ * Anton Kolechkin
+ * Sergey Nikitin
+ * psychogenic
+ * 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)

CONTRIBUTING.rst

@@ -0,0 +1,80 @@
+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`` package.

LICENSE

@@ -1,5 +1,5 @@
-Copyright (c) 2009-2010 Harry Marr
+Copyright (c) 2009 See AUTHORS
- 
+
 Permission is hereby granted, free of charge, to any person
 obtaining a copy of this software and associated documentation
 files (the "Software"), to deal in the Software without
@@ -8,10 +8,10 @@ copy, modify, merge, publish, distribute, sublicense, and/or sell
 copies of the Software, and to permit persons to whom the
 Software is furnished to do so, subject to the following
 conditions:
- 
+
 The above copyright notice and this permission notice shall be
 included in all copies or substantial portions of the Software.
- 
+
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND

MANIFEST.in

@@ -1,6 +1,6 @@
+include MANIFEST.in
 include README.rst
 include LICENSE
+include AUTHORS
 recursive-include docs *
-prune docs/_build/*
+prune docs/_build
-recursive-include tests *
-recursive-exclude * *.pyc *.swp

README.rst

@@ -2,36 +2,74 @@
 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: Stefan Wójcik (http://github.com/wojcikstefan)
+
+.. image:: https://travis-ci.org/MongoEngine/mongoengine.svg?branch=master
+  :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. 
+MongoEngine is a Python Object-Document Mapper for working with MongoDB.
-Documentation available at http://hmarr.com/mongoengine/ - there is currently 
+Documentation is available at https://mongoengine-odm.readthedocs.io - there
-a `tutorial <http://hmarr.com/mongoengine/tutorial.html>`_, a `user guide 
+is currently a `tutorial <https://mongoengine-odm.readthedocs.io/tutorial.html>`_,
-<http://hmarr.com/mongoengine/userguide.html>`_ and an `API reference
+a `user guide <https://mongoengine-odm.readthedocs.io/guide/index.html>`_, and
-<http://hmarr.com/mongoengine/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 mongoengine``. Otherwise, you can download the
+`pip <https://pip.pypa.io/>`_. You can then use ``pip install -U mongoengine``.
-source from `GitHub <http://github.com/hmarr/mongoengine>`_ and run ``python
+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 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)
@@ -58,32 +96,55 @@ 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
+=========
+- `MongoEngine Users mailing list
+  <http://groups.google.com/group/mongoengine-users>`_
+- `MongoEngine Developers mailing list
+  <http://groups.google.com/group/mongoengine-dev>`_
 
 Contributing
 ============
-The source is available on `GitHub <http://github.com/hmarr/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

@@ -0,0 +1,207 @@
+#!/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 main():
+    print("Benchmarking...")
+
+    setup = """
+from pymongo import MongoClient
+connection = MongoClient()
+connection.drop_database('timeit_test')
+"""
+
+    stmt = """
+from pymongo import MongoClient
+connection = MongoClient()
+
+db = connection.timeit_test
+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""")
+    t = timeit.Timer(stmt=stmt, setup=setup)
+    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 MongoClient
+connection = MongoClient()
+connection.drop_database('timeit_test')
+connection.close()
+
+from mongoengine import Document, DictField, connect
+connect('timeit_test')
+
+class Noddy(Document):
+    fields = DictField()
+"""
+
+    stmt = """
+for i in range(10000):
+    noddy = Noddy()
+    for j in range(20):
+        noddy.fields["key"+str(j)] = "value "+str(j)
+    noddy.save()
+
+myNoddys = Noddy.objects()
+[n for n in myNoddys] # iterate
+"""
+
+    print("-" * 100)
+    print("""Creating 10000 dictionaries - MongoEngine""")
+    t = timeit.Timer(stmt=stmt, setup=setup)
+    print(t.timeit(1))
+
+    stmt = """
+for i in range(10000):
+    noddy = Noddy()
+    fields = {}
+    for j in range(20):
+        fields["key"+str(j)] = "value "+str(j)
+    noddy.fields = fields
+    noddy.save()
+
+myNoddys = Noddy.objects()
+[n for n in myNoddys] # iterate
+"""
+
+    print("-" * 100)
+    print("""Creating 10000 dictionaries without continual assign - MongoEngine""")
+    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(write_concern={"w": 0}, cascade=True)
+
+myNoddys = Noddy.objects()
+[n for n in myNoddys] # iterate
+"""
+
+    print("-" * 100)
+    print("""Creating 10000 dictionaries - MongoEngine - write_concern={"w": 0}, cascade = True""")
+    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(write_concern={"w": 0}, validate=False, cascade=True)
+
+myNoddys = Noddy.objects()
+[n for n in myNoddys] # iterate
+"""
+
+    print("-" * 100)
+    print("""Creating 10000 dictionaries - MongoEngine, write_concern={"w": 0}, validate=False, cascade=True""")
+    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(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 */
-.nf { color: #990000; font-weight: bold } /* Name.Function */
-.nn { color: #555555 } /* Name.Namespace */
-.nt { color: #000080 } /* Name.Tag */
-.nv { color: purple } /* Name.Variable */
-.ow { font-weight: bold } /* Operator.Word */
-.mf { color: #009999 } /* Literal.Number.Float */
-.mh { color: #009999 } /* Literal.Number.Hex */
-.mi { color: #009999 } /* Literal.Number.Integer */
-.mo { color: #009999 } /* Literal.Number.Oct */
-.sb { color: #bb8844 } /* Literal.String.Backtick */
-.sc { color: #bb8844 } /* Literal.String.Char */
-.sd { color: #bb8844 } /* Literal.String.Doc */
-.s2 { color: #bb8844 } /* Literal.String.Double */
-.se { color: #bb8844 } /* Literal.String.Escape */
-.sh { color: #bb8844 } /* Literal.String.Heredoc */
-.si { color: #bb8844 } /* Literal.String.Interpol */
-.sx { color: #bb8844 } /* Literal.String.Other */
-.sr { color: #808000 } /* Literal.String.Regex */
-.s1 { color: #bb8844 } /* Literal.String.Single */
-.ss { color: #bb8844 } /* Literal.String.Symbol */
-.bp { color: #999999 } /* Name.Builtin.Pseudo */
-.vc { color: #ff99ff } /* Name.Variable.Class */
-.vg { color: #ff99ff } /* Name.Variable.Global */
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-.il { color: #009999 } /* Literal.Number.Integer.Long */

docs/_themes/nature/theme.conf

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

docs/_themes/sphinx_rtd_theme/__init__.py

@@ -0,0 +1,17 @@
+"""Sphinx ReadTheDocs theme.
+
+From https://github.com/ryan-roemer/sphinx-bootstrap-theme.
+
+"""
+import os
+
+VERSION = (0, 1, 5)
+
+__version__ = ".".join(str(v) for v in VERSION)
+__version_full__ = __version__
+
+
+def get_html_theme_path():
+    """Return list of HTML theme paths."""
+    cur_dir = os.path.abspath(os.path.dirname(os.path.dirname(__file__)))
+    return cur_dir

docs/_themes/sphinx_rtd_theme/breadcrumbs.html

@@ -0,0 +1,15 @@
+<ul class="wy-breadcrumbs">
+  <li><a href="{{ pathto(master_doc) }}">Docs</a> &raquo;</li>
+  <li><a href="">{{ title }}</a></li>
+    <li class="wy-breadcrumbs-aside">
+      {% if display_github %}
+        <a href="https://github.com/{{ github_user }}/{{ github_repo }}/blob/{{ github_version }}{{ conf_py_path }}{{ pagename }}.rst" class="icon icon-github"> Edit on GitHub</a>
+      {% elif display_bitbucket %}
+        <a href="https://bitbucket.org/{{ bitbucket_user }}/{{ bitbucket_repo }}/src/{{ bitbucket_version}}{{ conf_py_path }}{{ pagename }}.rst'" class="icon icon-bitbucket"> Edit on Bitbucket</a>
+      {% elif show_source and has_source and sourcename %}
+        <a href="{{ pathto('_sources/' + sourcename, true)|e }}" rel="nofollow"> View page source</a>
+      {% endif %}
+    </li>
+</ul>
+<hr/>
+

docs/_themes/sphinx_rtd_theme/footer.html

@@ -0,0 +1,30 @@
+<footer>
+  {% if next or prev %}
+    <div class="rst-footer-buttons">
+      {% if next %}
+        <a href="{{ next.link|e }}" class="btn btn-neutral float-right" title="{{ next.title|striptags|e }}">Next <span class="icon icon-circle-arrow-right"></span></a>
+      {% endif %}
+      {% if prev %}
+        <a href="{{ prev.link|e }}" class="btn btn-neutral" title="{{ prev.title|striptags|e }}"><span class="icon icon-circle-arrow-left"></span> Previous</a>
+      {% endif %}
+    </div>
+  {% endif %}
+
+  <hr/>
+
+  <p>
+  {%- if show_copyright %}
+    {%- if hasdoc('copyright') %}
+      {% trans path=pathto('copyright'), copyright=copyright|e %}&copy; <a href="{{ path }}">Copyright</a> {{ copyright }}.{% endtrans %}
+    {%- else %}
+      {% trans copyright=copyright|e %}&copy; Copyright {{ copyright }}.{% endtrans %}
+    {%- endif %}
+  {%- endif %}
+
+  {%- if last_updated %}
+    {% trans last_updated=last_updated|e %}Last updated on {{ last_updated }}.{% endtrans %}
+  {%- endif %}
+  </p>
+
+  {% trans %}<a href="https://www.github.com/snide/sphinx_rtd_theme">Sphinx theme</a> provided by <a href="http://readthedocs.org">Read the Docs</a>{% endtrans %}
+</footer>

docs/_themes/sphinx_rtd_theme/layout.html

@@ -0,0 +1,142 @@
+{# TEMPLATE VAR SETTINGS #}
+{%- set url_root = pathto('', 1) %}
+{%- if url_root == '#' %}{% set url_root = '' %}{% endif %}
+{%- if not embedded and docstitle %}
+  {%- set titlesuffix = " — "|safe + docstitle|e %}
+{%- else %}
+  {%- set titlesuffix = "" %}
+{%- endif %}
+
+<!DOCTYPE html>
+<!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]-->
+<!--[if gt IE 8]><!--> <html class="no-js" lang="en" > <!--<![endif]-->
+<head>
+  <meta charset="utf-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  {% block htmltitle %}
+  <title>{{ title|striptags|e }}{{ titlesuffix }}</title>
+  {% endblock %}
+
+  {# FAVICON #}
+  {% if favicon %}
+    <link rel="shortcut icon" href="{{ pathto('_static/' + favicon, 1) }}"/>
+  {% endif %}
+  {# CANONICAL #}
+  {%- if theme_canonical_url %}
+    <link rel="canonical" href="{{ theme_canonical_url }}{{ pagename }}.html"/>
+  {%- endif %}
+
+  {# CSS #}
+  <link href='https://fonts.googleapis.com/css?family=Lato:400,700|Roboto+Slab:400,700|Inconsolata:400,700' rel='stylesheet' type='text/css'>
+
+  {# JS #}
+  {% if not embedded %}
+
+    <script type="text/javascript">
+      var DOCUMENTATION_OPTIONS = {
+        URL_ROOT:'{{ url_root }}',
+        VERSION:'{{ release|e }}',
+        COLLAPSE_INDEX:false,
+        FILE_SUFFIX:'{{ '' if no_search_suffix else file_suffix }}',
+        HAS_SOURCE:  {{ has_source|lower }}
+      };
+    </script>
+    {%- for scriptfile in script_files %}
+      <script type="text/javascript" src="{{ pathto(scriptfile, 1) }}"></script>
+    {%- endfor %}
+
+    {% if use_opensearch %}
+      <link rel="search" type="application/opensearchdescription+xml" title="{% trans docstitle=docstitle|e %}Search within {{ docstitle }}{% endtrans %}" href="{{ pathto('_static/opensearch.xml', 1) }}"/>
+    {% endif %}
+
+  {% endif %}
+
+  {# RTD hosts these file themselves, so just load on non RTD builds #}
+  {% if not READTHEDOCS %}
+    <link rel="stylesheet" href="{{ pathto('_static/' + style, 1) }}" type="text/css" />
+    <script type="text/javascript" src="_static/js/theme.js"></script>
+  {% endif %}
+
+  {% for cssfile in css_files %}
+    <link rel="stylesheet" href="{{ pathto(cssfile, 1) }}" type="text/css" />
+  {% endfor %}
+
+  {%- block linktags %}
+    {%- if hasdoc('about') %}
+        <link rel="author" title="{{ _('About these documents') }}"
+              href="{{ pathto('about') }}"/>
+    {%- endif %}
+    {%- if hasdoc('genindex') %}
+        <link rel="index" title="{{ _('Index') }}"
+              href="{{ pathto('genindex') }}"/>
+    {%- endif %}
+    {%- if hasdoc('search') %}
+        <link rel="search" title="{{ _('Search') }}" href="{{ pathto('search') }}"/>
+    {%- endif %}
+    {%- if hasdoc('copyright') %}
+        <link rel="copyright" title="{{ _('Copyright') }}" href="{{ pathto('copyright') }}"/>
+    {%- endif %}
+    <link rel="top" title="{{ docstitle|e }}" href="{{ pathto('index') }}"/>
+    {%- if parents %}
+        <link rel="up" title="{{ parents[-1].title|striptags|e }}" href="{{ parents[-1].link|e }}"/>
+    {%- endif %}
+    {%- if next %}
+        <link rel="next" title="{{ next.title|striptags|e }}" href="{{ next.link|e }}"/>
+    {%- endif %}
+    {%- if prev %}
+        <link rel="prev" title="{{ prev.title|striptags|e }}" href="{{ prev.link|e }}"/>
+    {%- endif %}
+  {%- endblock %}
+  {%- block extrahead %} {% endblock %}
+
+  <script src="//cdnjs.cloudflare.com/ajax/libs/modernizr/2.6.2/modernizr.min.js"></script>
+
+</head>
+
+<body class="wy-body-for-nav">
+
+  <div class="wy-grid-for-nav">
+
+    {# SIDE NAV, TOGGLES ON MOBILE #}
+    <nav data-toggle="wy-nav-shift" class="wy-nav-side">
+      <div class="wy-side-nav-search">
+        <a href="{{ pathto(master_doc) }}" class="icon icon-home"> {{ project }}</a>
+        {% include "searchbox.html" %}
+      </div>
+
+      <div class="wy-menu wy-menu-vertical" data-spy="affix">
+        {% set toctree = toctree(maxdepth=2, collapse=False, includehidden=True) %}
+        {% if toctree %}
+            {{ toctree }}
+        {% else %}
+            <!-- Local TOC -->
+            <div class="local-toc">{{ toc }}</div>
+        {% endif %}
+      </div>
+      &nbsp;
+    </nav>
+
+    <section data-toggle="wy-nav-shift" class="wy-nav-content-wrap">
+
+      {# MOBILE NAV, TRIGGLES SIDE NAV ON TOGGLE #}
+      <nav class="wy-nav-top">
+        <i data-toggle="wy-nav-top" class="icon icon-reorder"></i>
+        <a href="{{ pathto(master_doc) }}">{{ project }}</a>
+      </nav>
+
+
+      {# PAGE CONTENT #}
+      <div class="wy-nav-content">
+        <div class="rst-content">
+          {% include "breadcrumbs.html" %}
+          {% block body %}{% endblock %}
+          {% include "footer.html" %}
+        </div>
+      </div>
+
+    </section>
+
+  </div>
+  {% include "versions.html" %}
+</body>
+</html>

docs/_themes/sphinx_rtd_theme/layout_old.html

@@ -0,0 +1,205 @@
+{#
+    basic/layout.html
+    ~~~~~~~~~~~~~~~~~
+
+    Master layout template for Sphinx themes.
+
+    :copyright: Copyright 2007-2013 by the Sphinx team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+#}
+{%- block doctype -%}
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
+  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+{%- endblock %}
+{%- set reldelim1 = reldelim1 is not defined and ' &raquo;' or reldelim1 %}
+{%- set reldelim2 = reldelim2 is not defined and ' |' or reldelim2 %}
+{%- set render_sidebar = (not embedded) and (not theme_nosidebar|tobool) and
+                         (sidebars != []) %}
+{%- set url_root = pathto('', 1) %}
+{# XXX necessary? #}
+{%- if url_root == '#' %}{% set url_root = '' %}{% endif %}
+{%- if not embedded and docstitle %}
+  {%- set titlesuffix = " &mdash; "|safe + docstitle|e %}
+{%- else %}
+  {%- set titlesuffix = "" %}
+{%- endif %}
+
+{%- macro relbar() %}
+    <div class="related">
+      <h3>{{ _('Navigation') }}</h3>
+      <ul>
+        {%- for rellink in rellinks %}
+        <li class="right" {% if loop.first %}style="margin-right: 10px"{% endif %}>
+          <a href="{{ pathto(rellink[0]) }}" title="{{ rellink[1]|striptags|e }}"
+             {{ accesskey(rellink[2]) }}>{{ rellink[3] }}</a>
+          {%- if not loop.first %}{{ reldelim2 }}{% endif %}</li>
+        {%- endfor %}
+        {%- block rootrellink %}
+        <li><a href="{{ pathto(master_doc) }}">{{ shorttitle|e }}</a>{{ reldelim1 }}</li>
+        {%- endblock %}
+        {%- for parent in parents %}
+          <li><a href="{{ parent.link|e }}" {% if loop.last %}{{ accesskey("U") }}{% endif %}>{{ parent.title }}</a>{{ reldelim1 }}</li>
+        {%- endfor %}
+        {%- block relbaritems %} {% endblock %}
+      </ul>
+    </div>
+{%- endmacro %}
+
+{%- macro sidebar() %}
+      {%- if render_sidebar %}
+      <div class="sphinxsidebar">
+        <div class="sphinxsidebarwrapper">
+          {%- block sidebarlogo %}
+          {%- if logo %}
+            <p class="logo"><a href="{{ pathto(master_doc) }}">
+              <img class="logo" src="{{ pathto('_static/' + logo, 1) }}" alt="Logo"/>
+            </a></p>
+          {%- endif %}
+          {%- endblock %}
+          {%- if sidebars != None %}
+            {#- new style sidebar: explicitly include/exclude templates #}
+            {%- for sidebartemplate in sidebars %}
+            {%- include sidebartemplate %}
+            {%- endfor %}
+          {%- else %}
+            {#- old style sidebars: using blocks -- should be deprecated #}
+            {%- block sidebartoc %}
+            {%- include "localtoc.html" %}
+            {%- endblock %}
+            {%- block sidebarrel %}
+            {%- include "relations.html" %}
+            {%- endblock %}
+            {%- block sidebarsourcelink %}
+            {%- include "sourcelink.html" %}
+            {%- endblock %}
+            {%- if customsidebar %}
+            {%- include customsidebar %}
+            {%- endif %}
+            {%- block sidebarsearch %}
+            {%- include "searchbox.html" %}
+            {%- endblock %}
+          {%- endif %}
+        </div>
+      </div>
+      {%- endif %}
+{%- endmacro %}
+
+{%- macro script() %}
+    <script type="text/javascript">
+      var DOCUMENTATION_OPTIONS = {
+        URL_ROOT:    '{{ url_root }}',
+        VERSION:     '{{ release|e }}',
+        COLLAPSE_INDEX: false,
+        FILE_SUFFIX: '{{ '' if no_search_suffix else file_suffix }}',
+        HAS_SOURCE:  {{ has_source|lower }}
+      };
+    </script>
+    {%- for scriptfile in script_files %}
+    <script type="text/javascript" src="{{ pathto(scriptfile, 1) }}"></script>
+    {%- endfor %}
+{%- endmacro %}
+
+{%- macro css() %}
+    <link rel="stylesheet" href="{{ pathto('_static/' + style, 1) }}" type="text/css" />
+    <link rel="stylesheet" href="{{ pathto('_static/pygments.css', 1) }}" type="text/css" />
+    {%- for cssfile in css_files %}
+    <link rel="stylesheet" href="{{ pathto(cssfile, 1) }}" type="text/css" />
+    {%- endfor %}
+{%- endmacro %}
+
+<html xmlns="http://www.w3.org/1999/xhtml">
+  <head>
+    <meta http-equiv="Content-Type" content="text/html; charset={{ encoding }}" />
+    {{ metatags }}
+    {%- block htmltitle %}
+    <title>{{ title|striptags|e }}{{ titlesuffix }}</title>
+    {%- endblock %}
+    {{ css() }}
+    {%- if not embedded %}
+    {{ script() }}
+    {%- if use_opensearch %}
+    <link rel="search" type="application/opensearchdescription+xml"
+          title="{% trans docstitle=docstitle|e %}Search within {{ docstitle }}{% endtrans %}"
+          href="{{ pathto('_static/opensearch.xml', 1) }}"/>
+    {%- endif %}
+    {%- if favicon %}
+    <link rel="shortcut icon" href="{{ pathto('_static/' + favicon, 1) }}"/>
+    {%- endif %}
+    {%- endif %}
+{%- block linktags %}
+    {%- if hasdoc('about') %}
+    <link rel="author" title="{{ _('About these documents') }}" href="{{ pathto('about') }}" />
+    {%- endif %}
+    {%- if hasdoc('genindex') %}
+    <link rel="index" title="{{ _('Index') }}" href="{{ pathto('genindex') }}" />
+    {%- endif %}
+    {%- if hasdoc('search') %}
+    <link rel="search" title="{{ _('Search') }}" href="{{ pathto('search') }}" />
+    {%- endif %}
+    {%- if hasdoc('copyright') %}
+    <link rel="copyright" title="{{ _('Copyright') }}" href="{{ pathto('copyright') }}" />
+    {%- endif %}
+    <link rel="top" title="{{ docstitle|e }}" href="{{ pathto('index') }}" />
+    {%- if parents %}
+    <link rel="up" title="{{ parents[-1].title|striptags|e }}" href="{{ parents[-1].link|e }}" />
+    {%- endif %}
+    {%- if next %}
+    <link rel="next" title="{{ next.title|striptags|e }}" href="{{ next.link|e }}" />
+    {%- endif %}
+    {%- if prev %}
+    <link rel="prev" title="{{ prev.title|striptags|e }}" href="{{ prev.link|e }}" />
+    {%- endif %}
+{%- endblock %}
+{%- block extrahead %} {% endblock %}
+  </head>
+  <body>
+{%- block header %}{% endblock %}
+
+{%- block relbar1 %}{{ relbar() }}{% endblock %}
+
+{%- block content %}
+  {%- block sidebar1 %} {# possible location for sidebar #} {% endblock %}
+
+    <div class="document">
+  {%- block document %}
+      <div class="documentwrapper">
+      {%- if render_sidebar %}
+        <div class="bodywrapper">
+      {%- endif %}
+          <div class="body">
+            {% block body %} {% endblock %}
+          </div>
+      {%- if render_sidebar %}
+        </div>
+      {%- endif %}
+      </div>
+  {%- endblock %}
+
+  {%- block sidebar2 %}{{ sidebar() }}{% endblock %}
+      <div class="clearer"></div>
+    </div>
+{%- endblock %}
+
+{%- block relbar2 %}{{ relbar() }}{% endblock %}
+
+{%- block footer %}
+    <div class="footer">
+    {%- if show_copyright %}
+      {%- if hasdoc('copyright') %}
+        {% trans path=pathto('copyright'), copyright=copyright|e %}&copy; <a href="{{ path }}">Copyright</a> {{ copyright }}.{% endtrans %}
+      {%- else %}
+        {% trans copyright=copyright|e %}&copy; Copyright {{ copyright }}.{% endtrans %}
+      {%- endif %}
+    {%- endif %}
+    {%- if last_updated %}
+      {% trans last_updated=last_updated|e %}Last updated on {{ last_updated }}.{% endtrans %}
+    {%- endif %}
+    {%- if show_sphinx %}
+      {% trans sphinx_version=sphinx_version|e %}Created using <a href="http://sphinx-doc.org/">Sphinx</a> {{ sphinx_version }}.{% endtrans %}
+    {%- endif %}
+    </div>
+    <p>asdf asdf asdf asdf 22</p>
+{%- endblock %}
+  </body>
+</html>
+

docs/_themes/sphinx_rtd_theme/search.html

@@ -0,0 +1,50 @@
+{#
+    basic/search.html
+    ~~~~~~~~~~~~~~~~~
+
+    Template for the search page.
+
+    :copyright: Copyright 2007-2013 by the Sphinx team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+#}
+{%- extends "layout.html" %}
+{% set title = _('Search') %}
+{% set script_files = script_files + ['_static/searchtools.js'] %}
+{% block extrahead %}
+  <script type="text/javascript">
+    jQuery(function() { Search.loadIndex("{{ pathto('searchindex.js', 1) }}"); });
+  </script>
+  {# this is used when loading the search index using $.ajax fails,
+     such as on Chrome for documents on localhost #}
+  <script type="text/javascript" id="searchindexloader"></script>
+  {{ super() }}
+{% endblock %}
+{% block body %}
+  <noscript>
+  <div id="fallback" class="admonition warning">
+    <p class="last">
+      {% trans %}Please activate JavaScript to enable the search
+      functionality.{% endtrans %}
+    </p>
+  </div>
+  </noscript>
+
+  {% if search_performed %}
+    <h2>{{ _('Search Results') }}</h2>
+    {% if not search_results %}
+      <p>{{ _('Your search did not match any documents. Please make sure that all words are spelled correctly and that you\'ve selected enough categories.') }}</p>
+    {% endif %}
+  {% endif %}
+  <div id="search-results">
+  {% if search_results %}
+    <ul>
+    {% for href, caption, context in search_results %}
+      <li>
+        <a href="{{ pathto(item.href) }}">{{ caption }}</a>
+        <p class="context">{{ context|e }}</p>
+      </li>
+    {% endfor %}
+    </ul>
+  {% endif %}
+  </div>
+{% endblock %}

docs/_themes/sphinx_rtd_theme/searchbox.html

@@ -0,0 +1,5 @@
+<form id ="rtd-search-form" class="wy-form" action="{{ pathto('search') }}" method="get">
+  <input type="text" name="q" placeholder="Search docs" />
+  <input type="hidden" name="check_keywords" value="yes" />
+  <input type="hidden" name="area" value="default" />
+</form>

docs/_themes/sphinx_rtd_theme/static/css/badge_only.css

@@ -0,0 +1 @@
+.font-smooth,.icon:before{-webkit-font-smoothing:antialiased}.clearfix{*zoom:1}.clearfix:before,.clearfix:after{display:table;content:""}.clearfix:after{clear:both}@font-face{font-family:fontawesome-webfont;font-weight:normal;font-style:normal;src:url("../font/fontawesome_webfont.eot");src:url("../font/fontawesome_webfont.eot?#iefix") format("embedded-opentype"),url("../font/fontawesome_webfont.woff") format("woff"),url("../font/fontawesome_webfont.ttf") format("truetype"),url("../font/fontawesome_webfont.svg#fontawesome-webfont") format("svg")}.icon:before{display:inline-block;font-family:fontawesome-webfont;font-style:normal;font-weight:normal;line-height:1;text-decoration:inherit}a .icon{display:inline-block;text-decoration:inherit}li .icon{display:inline-block}li .icon-large:before,li .icon-large:before{width:1.875em}ul.icons{list-style-type:none;margin-left:2em;text-indent:-0.8em}ul.icons li .icon{width:0.8em}ul.icons li .icon-large:before,ul.icons li .icon-large:before{vertical-align:baseline}.icon-book:before{content:"\f02d"}.icon-caret-down:before{content:"\f0d7"}.icon-caret-up:before{content:"\f0d8"}.icon-caret-left:before{content:"\f0d9"}.icon-caret-right:before{content:"\f0da"}.rst-versions{position:fixed;bottom:0;left:0;width:300px;color:#fcfcfc;background:#1f1d1d;border-top:solid 10px #343131;font-family:"Lato","proxima-nova","Helvetica Neue",Arial,sans-serif;z-index:400}.rst-versions a{color:#2980b9;text-decoration:none}.rst-versions .rst-badge-small{display:none}.rst-versions .rst-current-version{padding:12px;background-color:#272525;display:block;text-align:right;font-size:90%;cursor:pointer;color:#27ae60;*zoom:1}.rst-versions .rst-current-version:before,.rst-versions .rst-current-version:after{display:table;content:""}.rst-versions .rst-current-version:after{clear:both}.rst-versions .rst-current-version .icon{color:#fcfcfc}.rst-versions .rst-current-version .icon-book{float:left}.rst-versions .rst-current-version.rst-out-of-date{background-color:#e74c3c;color:#fff}.rst-versions.shift-up .rst-other-versions{display:block}.rst-versions .rst-other-versions{font-size:90%;padding:12px;color:gray;display:none}.rst-versions .rst-other-versions hr{display:block;height:1px;border:0;margin:20px 0;padding:0;border-top:solid 1px #413d3d}.rst-versions .rst-other-versions dd{display:inline-block;margin:0}.rst-versions .rst-other-versions dd a{display:inline-block;padding:6px;color:#fcfcfc}.rst-versions.rst-badge{width:auto;bottom:20px;right:20px;left:auto;border:none;max-width:300px}.rst-versions.rst-badge .icon-book{float:none}.rst-versions.rst-badge.shift-up .rst-current-version{text-align:right}.rst-versions.rst-badge.shift-up .rst-current-version .icon-book{float:left}.rst-versions.rst-badge .rst-current-version{width:auto;height:30px;line-height:30px;padding:0 6px;display:block;text-align:center}@media screen and (max-width: 768px){.rst-versions{width:85%;display:none}.rst-versions.shift{display:block}img{width:100%;height:auto}}

docs/_themes/sphinx_rtd_theme/static/font/fontawesome_webfont.svg

@@ -0,0 +1,399 @@
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd" >
+<svg xmlns="http://www.w3.org/2000/svg">
+<metadata></metadata>
+<defs>
+<font id="fontawesomeregular" horiz-adv-x="1536" >
+<font-face units-per-em="1792" ascent="1536" descent="-256" />
+<missing-glyph horiz-adv-x="448" />
+<glyph unicode=" "  horiz-adv-x="448" />
+<glyph unicode="&#x09;" horiz-adv-x="448" />
+<glyph unicode="&#xa0;" horiz-adv-x="448" />
+<glyph unicode="&#xa8;" horiz-adv-x="1792" />
+<glyph unicode="&#xa9;" horiz-adv-x="1792" />
+<glyph unicode="&#xae;" horiz-adv-x="1792" />
+<glyph unicode="&#xb4;" horiz-adv-x="1792" />
+<glyph unicode="&#xc6;" horiz-adv-x="1792" />
+<glyph unicode="&#x2000;" horiz-adv-x="768" />
+<glyph unicode="&#x2001;" />
+<glyph unicode="&#x2002;" horiz-adv-x="768" />
+<glyph unicode="&#x2003;" />
+<glyph unicode="&#x2004;" horiz-adv-x="512" />
+<glyph unicode="&#x2005;" horiz-adv-x="384" />
+<glyph unicode="&#x2006;" horiz-adv-x="256" />
+<glyph unicode="&#x2007;" horiz-adv-x="256" />
+<glyph unicode="&#x2008;" horiz-adv-x="192" />
+<glyph unicode="&#x2009;" horiz-adv-x="307" />
+<glyph unicode="&#x200a;" horiz-adv-x="85" />
+<glyph unicode="&#x202f;" horiz-adv-x="307" />
+<glyph unicode="&#x205f;" horiz-adv-x="384" />
+<glyph unicode="&#x2122;" horiz-adv-x="1792" />
+<glyph unicode="&#x221e;" horiz-adv-x="1792" />
+<glyph unicode="&#x2260;" horiz-adv-x="1792" />
+<glyph unicode="&#xe000;" horiz-adv-x="500" d="M0 0z" />
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docs/_themes/sphinx_rtd_theme/static/js/theme.js

@@ -0,0 +1,16 @@
+$( document ).ready(function() {
+  // Shift nav in mobile when clicking the menu.
+  $("[data-toggle='wy-nav-top']").click(function() {
+    $("[data-toggle='wy-nav-shift']").toggleClass("shift");
+    $("[data-toggle='rst-versions']").toggleClass("shift");
+  });
+  // Close menu when you click a link.
+  $(".wy-menu-vertical .current ul li a").click(function() {
+    $("[data-toggle='wy-nav-shift']").removeClass("shift");
+    $("[data-toggle='rst-versions']").toggleClass("shift");
+  });
+  $("[data-toggle='rst-current-version']").click(function() {
+    $("[data-toggle='rst-versions']").toggleClass("shift-up");
+  });
+  $("table.docutils:not(.field-list").wrap("<div class='wy-table-responsive'></div>");
+});

docs/_themes/sphinx_rtd_theme/theme.conf

@@ -0,0 +1,8 @@
+[theme]
+inherit = basic
+stylesheet = css/theme.css
+
+[options]
+typekit_id = hiw1hhg
+analytics_id =
+canonical_url =

docs/_themes/sphinx_rtd_theme/versions.html

@@ -0,0 +1,37 @@
+{% if READTHEDOCS %}
+{# Add rst-badge after rst-versions for small badge style. #}
+  <div class="rst-versions" data-toggle="rst-versions">
+    <span class="rst-current-version" data-toggle="rst-current-version">
+      <span class="icon icon-book"> Read the Docs</span>
+      v: {{ current_version }} 
+      <span class="icon icon-caret-down"></span>
+    </span>
+    <div class="rst-other-versions">
+      <dl>
+        <dt>Versions</dt>
+        {% for slug, url in versions %}
+          <dd><a href="{{ url }}">{{ slug }}</a></dd>
+        {% endfor %}
+      </dl>
+      <dl>
+        <dt>Downloads</dt>
+        {% for type, url in downloads %}
+          <dd><a href="{{ url }}">{{ type }}</a></dd>
+        {% endfor %}
+      </dl>
+      <dl>
+        <dt>On Read the Docs</dt>
+          <dd>
+            <a href="//{{ PRODUCTION_DOMAIN }}/projects/{{ slug }}/?fromdocs={{ slug }}">Project Home</a>
+          </dd>
+          <dd>
+            <a href="//{{ PRODUCTION_DOMAIN }}/builds/{{ slug }}/?fromdocs={{ slug }}">Builds</a>
+          </dd>
+      </dl>
+      <hr/>
+      Free document hosting provided by <a href="http://www.readthedocs.org">Read the Docs</a>.
+
+    </div>
+  </div>
+{% endif %}
+

docs/apireference.rst

@@ -6,6 +6,7 @@ Connecting
 ==========
 
 .. autofunction:: mongoengine.connect
+.. autofunction:: mongoengine.register_connection
 
 Documents
 =========
@@ -15,35 +16,113 @@ Documents
 
    .. attribute:: objects
 
-      A :class:`~mongoengine.queryset.QuerySet` object that is created lazily 
+      A :class:`~mongoengine.queryset.QuerySet` object that is created lazily
       on access.
 
 .. autoclass:: mongoengine.EmbeddedDocument
    :members:
 
+.. autoclass:: mongoengine.DynamicDocument
+   :members:
+
+.. autoclass:: mongoengine.DynamicEmbeddedDocument
+   :members:
+
+.. autoclass:: mongoengine.document.MapReduceDocument
+  :members:
+
+.. 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
 ========
 
-.. autoclass:: mongoengine.queryset.QuerySet
+.. automodule:: mongoengine.queryset
-   :members:
+    :synopsis: Queryset level operations
 
-.. autofunction:: mongoengine.queryset.queryset_manager
+    .. autoclass:: mongoengine.queryset.QuerySet
+      :members:
+      :inherited-members:
+
+      .. automethod:: QuerySet.__call__
+
+    .. autoclass:: mongoengine.queryset.QuerySetNoCache
+      :members:
+
+       .. automethod:: mongoengine.queryset.QuerySetNoCache.__call__
+
+    .. autofunction:: mongoengine.queryset.queryset_manager
 
 Fields
 ======
 
-.. autoclass:: mongoengine.StringField
+.. autoclass:: mongoengine.base.fields.BaseField
+.. autoclass:: mongoengine.fields.StringField
+.. autoclass:: mongoengine.fields.URLField
+.. autoclass:: mongoengine.fields.EmailField
+.. autoclass:: mongoengine.fields.IntField
+.. autoclass:: mongoengine.fields.LongField
+.. autoclass:: mongoengine.fields.FloatField
+.. autoclass:: mongoengine.fields.DecimalField
+.. autoclass:: mongoengine.fields.BooleanField
+.. autoclass:: mongoengine.fields.DateTimeField
+.. autoclass:: mongoengine.fields.ComplexDateTimeField
+.. autoclass:: mongoengine.fields.EmbeddedDocumentField
+.. autoclass:: mongoengine.fields.GenericEmbeddedDocumentField
+.. autoclass:: mongoengine.fields.DynamicField
+.. autoclass:: mongoengine.fields.ListField
+.. autoclass:: mongoengine.fields.EmbeddedDocumentListField
+.. autoclass:: mongoengine.fields.SortedListField
+.. autoclass:: mongoengine.fields.DictField
+.. autoclass:: mongoengine.fields.MapField
+.. autoclass:: mongoengine.fields.ReferenceField
+.. autoclass:: mongoengine.fields.GenericReferenceField
+.. autoclass:: mongoengine.fields.CachedReferenceField
+.. 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
 
-.. autoclass:: mongoengine.IntField
+Embedded Document Querying
+==========================
 
-.. autoclass:: mongoengine.FloatField
+.. versionadded:: 0.9
 
-.. autoclass:: mongoengine.DateTimeField
+Additional queries for Embedded Documents are available when using the
+:class:`~mongoengine.EmbeddedDocumentListField` to store a list of embedded
+documents.
 
-.. autoclass:: mongoengine.EmbeddedDocumentField
+A list of embedded documents is returned as a special list with the
+following methods:
 
-.. autoclass:: mongoengine.ListField
+.. autoclass:: mongoengine.base.datastructures.EmbeddedDocumentList
+    :members:
 
-.. autoclass:: mongoengine.ObjectIdField
+Misc
+====
 
-.. autoclass:: mongoengine.ReferenceField
+.. autofunction:: mongoengine.common._import_class

docs/changelog.rst

@@ -2,6 +2,859 @@
 Changelog
 =========
 
+Development
+===========
+- (Fill this out as you fix issues and develop your features).
+
+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 (#89)
+- Added FutureWarning - save will default to `cascade=False` in 0.8
+- Added example of indexing embedded document fields (#75)
+- Fixed ImageField resizing when forcing size (#80)
+- Add flexibility for fields handling bad data (#78)
+- Embedded Documents no longer handle meta definitions
+- 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 (#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 (#59)
+- Improved support for chained querysets when constraining the same fields (hmarr/mongoengine#554)
+- Fixed BinaryField lookup re (#48)
+
+Changes in 0.6.19
+=================
+
+- Added Binary support to UUID (#47)
+- Fixed MapField lookup for fields without declared lookups (#46)
+- Fixed BinaryField python value issue (#48)
+- Fixed SequenceField non numeric value lookup (#41)
+- Fixed queryset manager issue (#52)
+- Fixed FileField comparision (hmarr/mongoengine#547)
+
+Changes in 0.6.18
+=================
+- Fixed recursion loading bug in _get_changed_fields
+
+Changes in 0.6.17
+=================
+- Fixed issue with custom queryset manager expecting explict variable names
+
+Changes in 0.6.16
+=================
+- Fixed issue where db_alias wasn't inherited
+
+Changes in 0.6.15
+=================
+- Updated validation error messages
+- Added support for null / zero / false values in item_frequencies
+- Fixed cascade save edge case
+- Fixed geo index creation through reference fields
+- Added support for args / kwargs when using @queryset_manager
+- Deref list custom id fix
+
+Changes in 0.6.14
+=================
+- Fixed error dict with nested validation
+- Fixed Int/Float fields and not equals None
+- Exclude tests from installation
+- Allow tuples for index meta
+- Fixed use of str in instance checks
+- Fixed unicode support in transform update
+- Added support for add_to_set and each
+
+Changes in 0.6.13
+=================
+- Fixed EmbeddedDocument db_field validation issue
+- Fixed StringField unicode issue
+- Fixes __repr__ modifying the cursor
+
+Changes in 0.6.12
+=================
+- Fixes scalar lookups for primary_key
+- 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
+- Fixed Django TestCase
+- Added cmp to Embedded Document
+- Added PULL reverse_delete_rule
+- Fixed CASCADE delete bug
+- Fixed db_field data load error
+- Fixed recursive save with FileField
+
+Changes in 0.6.10
+=================
+- Fixed basedict / baselist to return super(..)
+- Promoted BaseDynamicField to DynamicField
+
+Changes in 0.6.9
+================
+- Fixed sparse indexes on inherited docs
+- Removed FileField auto deletion, needs more work maybe 0.7
+
+Changes in 0.6.8
+================
+- Fixed FileField losing reference when no default set
+- Removed possible race condition from FileField (grid_file)
+- Added assignment to save, can now do: `b = MyDoc(**kwargs).save()`
+- Added support for pull operations on nested EmbeddedDocuments
+- Added support for choices with GenericReferenceFields
+- Added support for choices with GenericEmbeddedDocumentFields
+- Fixed Django 1.4 sessions first save data loss
+- FileField now automatically delete files on .delete()
+- Fix for GenericReference to_mongo method
+- Fixed connection regression
+- Updated Django User document, now allows inheritance
+
+Changes in 0.6.7
+================
+- Fixed indexing on '_id' or 'pk' or 'id'
+- Invalid data from the DB now raises a InvalidDocumentError
+- Cleaned up the Validation Error - docs and code
+- Added meta `auto_create_index` so you can disable index creation
+- Added write concern options to inserts
+- Fixed typo in meta for index options
+- Bug fix Read preference now passed correctly
+- Added support for File like objects for GridFS
+- Fix for #473 - Dereferencing abstracts
+
+Changes in 0.6.6
+================
+- Django 1.4 fixed (finally)
+- Added tests for Django
+
+Changes in 0.6.5
+================
+- More Django updates
+
+Changes in 0.6.4
+================
+
+- Refactored connection / fixed replicasetconnection
+- Bug fix for unknown connection alias error message
+- Sessions support Django 1.3 and Django 1.4
+- Minor fix for ReferenceField
+
+Changes in 0.6.3
+================
+- Updated sessions for Django 1.4
+- Bug fix for updates where listfields contain embedded documents
+- Bug fix for collection naming and mixins
+
+Changes in 0.6.2
+================
+- Updated documentation for ReplicaSet connections
+- Hack round _types issue with SERVER-5247 - querying other arrays may also cause problems.
+
+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
+- No longer always upsert on save for items with a '_id'
+- Error raised if update doesn't have an operation
+- DeReferencing is now thread safe
+- Errors raised if trying to perform a join in a query
+- Updates can now take __raw__ queries
+- Added custom 2D index declarations
+- Added replicaSet connection support
+- Updated deprecated imports from pymongo (safe for pymongo 2.2)
+- Added uri support for connections
+- Added scalar for efficiently returning partial data values (aliased to values_list)
+- Fixed limit skip bug
+- Improved Inheritance / Mixin
+- Added sharding support
+- Added pymongo 2.1 support
+- Fixed Abstract documents can now declare indexes
+- Added db_alias support to individual documents
+- Fixed GridFS documents can now be pickled
+- Added Now raises an InvalidDocumentError when declaring multiple fields with the same db_field
+- Added InvalidQueryError when calling with_id with a filter
+- Added support for DBRefs in distinct()
+- Fixed issue saving False booleans
+- Fixed issue with dynamic documents deltas
+- Added Reverse Delete Rule support to ListFields - MapFields aren't supported
+- Added customisable cascade kwarg options
+- Fixed Handle None values for non-required fields
+- Removed Document._get_subclasses() - no longer required
+- Fixed bug requiring subclasses when not actually needed
+- Fixed deletion of dynamic data
+- Added support for the $elementMatch operator
+- Added reverse option to SortedListFields
+- Fixed dereferencing - multi directional list dereferencing
+- Fixed issue creating indexes with recursive embedded documents
+- Fixed recursive lookup in _unique_with_indexes
+- Fixed passing ComplexField defaults to constructor for ReferenceFields
+- Fixed validation of DictField Int keys
+- Added optional cascade saving
+- Fixed dereferencing - max_depth now taken into account
+- Fixed document mutation saving issue
+- Fixed positional operator when replacing embedded documents
+- Added Non-Django Style choices back (you can have either)
+- Fixed __repr__ of a sliced queryset
+- Added recursive validation error of documents / complex fields
+- Fixed breaking during queryset iteration
+- Added pre and post bulk-insert signals
+- Added ImageField - requires PIL
+- Fixed Reference Fields can be None in get_or_create / queries
+- Fixed accessing pk on an embedded document
+- Fixed calling a queryset after drop_collection now recreates the collection
+- Add field name to validation exception messages
+- Added UUID field
+- Improved efficiency of .get()
+- Updated ComplexFields so if required they won't accept empty lists / dicts
+- Added spec file for rpm-based distributions
+- Fixed ListField so it doesnt accept strings
+- Added DynamicDocument and EmbeddedDynamicDocument classes for expando schemas
+
+Changes in v0.5.2
+=================
+
+- A Robust Circular reference bugfix
+
+
+Changes in v0.5.1
+=================
+
+- Fixed simple circular reference bug
+
+Changes in v0.5
+===============
+
+- Added InvalidDocumentError - so Document core methods can't be overwritten
+- Added GenericEmbeddedDocument - so you can embed any type of embeddable document
+- Added within_polygon support - for those with mongodb 1.9
+- Updated sum / average to use map_reduce as db.eval doesn't work in sharded environments
+- Added where() - filter to allowing users to specify query expressions as Javascript
+- Added SequenceField - for creating sequential counters
+- Added update() convenience method to a document
+- Added cascading saves - so changes to Referenced documents are saved on .save()
+- Added select_related() support
+- Added support for the positional operator
+- Updated geo index checking to be recursive and check in embedded documents
+- Updated default collection naming convention
+- 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 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
+- Fixed saving so sets updated values rather than overwrites
+- Added ComplexDateTimeField - Handles datetimes correctly with microseconds
+- Added ComplexBaseField - for improved flexibility and performance
+- Added get_FIELD_display() method for easy choice field displaying
+- Added queryset.slave_okay(enabled) method
+- Updated queryset.timeout(enabled) and queryset.snapshot(enabled) to be chainable
+- Added insert method for bulk inserts
+- Added blinker signal support
+- Added query_counter context manager for tests
+- Added map_reduce method item_frequencies and set as default (as db.eval doesn't work in sharded environments)
+- Added inline_map_reduce option to map_reduce
+- Updated connection exception so it provides more info on the cause.
+- Added searching multiple levels deep in ``DictField``
+- Added ``DictField`` entries containing strings to use matching operators
+- Added ``MapField``, similar to ``DictField``
+- Added Abstract Base Classes
+- Added Custom Objects Managers
+- Added sliced subfields updating
+- Added ``NotRegistered`` exception if dereferencing ``Document`` not in the registry
+- Added a write concern for ``save``, ``update``, ``update_one`` and ``get_or_create``
+- Added slicing / subarray fetching controls
+- Fixed various unique index and other index issues
+- Fixed threaded connection issues
+- Added spherical geospatial query operators
+- Updated queryset to handle latest version of pymongo
+  map_reduce now requires an output.
+- Added ``Document`` __hash__, __ne__ for pickling
+- Added ``FileField`` optional size arg for read method
+- Fixed ``FileField`` seek and tell methods for reading files
+- Added ``QuerySet.clone`` to support copying querysets
+- Fixed item_frequencies when using name thats the same as a native js function
+- Added reverse delete rules
+- Fixed issue with unset operation
+- Fixed Q-object bug
+- Added ``QuerySet.all_fields`` resets previous .only() and .exclude()
+- Added ``QuerySet.exclude``
+- Added django style choices
+- Fixed order and filter issue
+- Added ``QuerySet.only`` subfield support
+- Added creation_counter to ``BaseField`` allowing fields to be sorted in the
+  way the user has specified them
+- Fixed various errors
+- Added many tests
+
+Changes in v0.4
+===============
+- Added ``GridFSStorage`` Django storage backend
+- Added ``FileField`` for GridFS support
+- New Q-object implementation, which is no longer based on Javascript
+- Added ``SortedListField``
+- Added ``EmailField``
+- Added ``GeoPointField``
+- Added ``exact`` and ``iexact`` match operators to ``QuerySet``
+- Added ``get_document_or_404`` and ``get_list_or_404`` Django shortcuts
+- Added new query operators for Geo queries
+- Added ``not`` query operator
+- Added new update operators: ``pop`` and ``add_to_set``
+- Added ``__raw__`` query parameter
+- Added support for custom querysets
+- Fixed document inheritance primary key issue
+- Added support for querying by array element position
+- Base class can now be defined for ``DictField``
+- Fixed MRO error that occured on document inheritance
+- Added ``QuerySet.distinct``, ``QuerySet.create``, ``QuerySet.snapshot``,
+  ``QuerySet.timeout`` and ``QuerySet.all``
+- Subsequent calls to ``connect()`` now work
+- Introduced ``min_length`` for ``StringField``
+- Fixed multi-process connection issue
+- Other minor fixes
+
+Changes in v0.3
+===============
+- Added MapReduce support
+- Added ``contains``, ``startswith`` and ``endswith`` query operators (and
+  case-insensitive versions that are prefixed with 'i')
+- Deprecated fields' ``name`` parameter, replaced with ``db_field``
+- Added ``QuerySet.only`` for only retrieving specific fields
+- Added ``QuerySet.in_bulk()`` for bulk querying using ids
+- ``QuerySet``\ s now have a ``rewind()`` method, which is called automatically
+  when the iterator is exhausted, allowing ``QuerySet``\ s to be reused
+- Added ``DictField``
+- Added ``URLField``
+- Added ``DecimalField``
+- Added ``BinaryField``
+- Added ``GenericReferenceField``
+- Added ``get()`` and ``get_or_create()`` methods to ``QuerySet``
+- ``ReferenceField``\ s may now reference the document they are defined on
+  (recursive references) and documents that have not yet been defined
+- ``Document`` objects may now be compared for equality (equal if _ids are
+  equal and documents are of same type)
+- ``QuerySet`` update methods now have an ``upsert`` parameter
+- Added field name substitution for Javascript code (allows the user to use the
+  Python names for fields in JS, which are later substituted for the real field
+  names)
+- ``Q`` objects now support regex querying
+- Fixed bug where referenced documents within lists weren't properly
+  dereferenced
+- ``ReferenceField``\ s may now be queried using their _id
+- Fixed bug where ``EmbeddedDocuments`` couldn't be non-polymorphic
+- ``queryset_manager`` functions now accept two arguments -- the document class
+  as the first and the queryset as the second
+- Fixed bug where ``QuerySet.exec_js`` ignored ``Q`` objects
+- Other minor fixes
+
+Changes in v0.2.2
+=================
+- Fixed bug that prevented indexes from being used on ``ListField``\ s
+- ``Document.filter()`` added as an alias to ``Document.__call__()``
+- ``validate()`` may now be used on ``EmbeddedDocument``\ s
+
+Changes in v0.2.1
+=================
+- Added a MongoEngine backend for Django sessions
+- Added ``force_insert`` to ``Document.save()``
+- Improved querying syntax for ``ListField`` and ``EmbeddedDocumentField``
+- Added support for user-defined primary keys (``_id`` in MongoDB)
+
+Changes in v0.2
+===============
+- Added ``Q`` class for building advanced queries
+- Added ``QuerySet`` methods for atomic updates to documents
+- Fields may now specify ``unique=True`` to enforce uniqueness across a
+  collection
+- Added option for default document ordering
+- Fixed bug in index definitions
+
+Changes in v0.1.3
+=================
+- Added Django authentication backend
+- Added ``Document.meta`` support for indexes, which are ensured just before
+  querying takes place
+- A few minor bugfixes
+
+
+Changes in v0.1.2
+=================
+- Query values may be processed before before being used in queries
+- Made connections lazy
+- Fixed bug in Document dictionary-style access
+- Added ``BooleanField``
+- Added ``Document.reload()`` method
+
+
 Changes in v0.1.1
 =================
 - Documents may now use capped collections

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

@@ -16,16 +16,16 @@ import sys, os
 # 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 -----------------------------------------------------
 
 # Add any Sphinx extension module names here, as strings. They can be extensions
 # coming with Sphinx (named 'sphinx.ext.*') or your custom ones.
-extensions = ['sphinx.ext.autodoc']
+extensions = ['sphinx.ext.autodoc', 'sphinx.ext.todo']
 
 # Add any paths that contain templates here, relative to this directory.
-templates_path = ['.templates']
+templates_path = ['_templates']
 
 # The suffix of source filenames.
 source_suffix = '.rst'
@@ -38,7 +38,7 @@ master_doc = 'index'
 
 # General information about the project.
 project = u'MongoEngine'
-copyright = u'2009, Harry Marr'
+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
@@ -92,7 +92,7 @@ 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
@@ -116,12 +116,12 @@ 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,
 # so a file named "default.css" will overwrite the builtin "default.css".
-html_static_path = ['_static']
+#html_static_path = ['_static']
 
 # If not '', a 'Last updated on:' timestamp is inserted at every page bottom,
 # using the given strftime format.
@@ -132,7 +132,11 @@ html_static_path = ['_static']
 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 +177,8 @@ 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 +197,9 @@ latex_documents = [
 
 # If false, no module index is generated.
 #latex_use_modindex = True
+
+autoclass_content = 'both'
+
+html_theme_options = dict(
+    canonical_url='http://docs.mongoengine.org/en/latest/'
+)

docs/django.rst

@@ -0,0 +1,19 @@
+==============
+Django Support
+==============
+
+.. note:: Django support has been split from the main MongoEngine
+    repository. The *legacy* Django extension may be found bundled with the
+    0.9 release of MongoEngine.
+
+
+
+Help Wanted!
+------------
+
+The MongoEngine team is looking for help contributing and maintaining a new
+Django extension for MongoEngine! If you have Django experience and would like
+to help contribute to the project, please get in touch on the 
+`mailing list <http://groups.google.com/group/mongoengine-users>`_ or by 
+simply contributing on
+`GitHub <https://github.com/MongoEngine/django-mongoengine>`_.

docs/guide/connecting.rst

@@ -0,0 +1,139 @@
+.. _guide-connecting:
+
+=====================
+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::
+
+    from mongoengine import connect
+    connect('project1')
+
+By default, MongoEngine assumes that the :program:`mongod` instance is running
+on **localhost** on port **27017**. If MongoDB is running elsewhere, you should
+provide the :attr:`host` and :attr:`port` arguments to
+:func:`~mongoengine.connect`::
+
+    connect('project1', host='192.168.1.35', port=12345)
+
+If the database requires authentication, :attr:`username` and :attr:`password`
+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')
+
+.. note:: Database, username and password from URI string overrides
+    corresponding parameters in :func:`~mongoengine.connect`: ::
+
+        connect(
+            db='test',
+            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
+==================
+
+To use multiple databases you can use :func:`~mongoengine.connect` and provide
+an `alias` name for the connection - if no `alias` is provided then "default"
+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 to point across databases and collections. Below is an example schema,
+using 3 different databases to store data::
+
+        class User(Document):
+            name = StringField()
+
+            meta = {'db_alias': 'user-db'}
+
+        class Book(Document):
+            name = StringField()
+
+            meta = {'db_alias': 'book-db'}
+
+        class AuthorBooks(Document):
+            author = ReferenceField(User)
+            book = ReferenceField(Book)
+
+            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

@@ -0,0 +1,768 @@
+==================
+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 principal difference is that no schema
+is enforced at a database level.
+
+Defining a document's schema
+============================
+MongoEngine allows you to define schemata for documents as this helps to reduce
+coding errors, and allows for utility methods to be defined on fields which may
+be present.
+
+To define a schema for a document, create a class that inherits from
+:class:`~mongoengine.Document`. Fields are specified by adding **field
+objects** as class attributes to the document class::
+
+    from mongoengine import *
+    import datetime
+
+    class Page(Document):
+        title = StringField(max_length=200, required=True)
+        date_modified = DateTimeField(default=datetime.datetime.now)
+
+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
+should be planned and organised (after all explicit is better than implicit!)
+there are scenarios where having dynamic / expando style documents is desirable.
+
+:class:`~mongoengine.DynamicDocument` documents work in the same way as
+:class:`~mongoengine.Document` but any data / attributes set to them will also
+be saved ::
+
+    from mongoengine import *
+
+    class Page(DynamicDocument):
+        title = StringField(max_length=200, required=True)
+
+    # Create a new page and add tags
+    >>> page = Page(title='Using MongoEngine')
+    >>> page.tags = ['mongodb', 'mongoengine']
+    >>> page.save()
+
+    >>> Page.objects(tags='mongoengine').count()
+    >>> 1
+
+.. note::
+
+   There is one caveat on Dynamic Documents: fields cannot start with `_`
+
+Dynamic fields are stored in creation order *after* any declared fields.
+
+Fields
+======
+By default, fields are not required. To make a field mandatory, set the
+:attr:`required` keyword argument of a field to ``True``. Fields also may have
+validation constraints available (such as :attr:`max_length` in the example
+above). Fields may also take default values, which will be used if a value is
+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.fields.BinaryField`
+* :class:`~mongoengine.fields.BooleanField`
+* :class:`~mongoengine.fields.ComplexDateTimeField`
+* :class:`~mongoengine.fields.DateTimeField`
+* :class:`~mongoengine.fields.DecimalField`
+* :class:`~mongoengine.fields.DictField`
+* :class:`~mongoengine.fields.DynamicField`
+* :class:`~mongoengine.fields.EmailField`
+* :class:`~mongoengine.fields.EmbeddedDocumentField`
+* :class:`~mongoengine.fields.EmbeddedDocumentListField`
+* :class:`~mongoengine.fields.FileField`
+* :class:`~mongoengine.fields.FloatField`
+* :class:`~mongoengine.fields.GenericEmbeddedDocumentField`
+* :class:`~mongoengine.fields.GenericReferenceField`
+* :class:`~mongoengine.fields.GeoPointField`
+* :class:`~mongoengine.fields.ImageField`
+* :class:`~mongoengine.fields.IntField`
+* :class:`~mongoengine.fields.ListField`
+* :class:`~mongoengine.fields.MapField`
+* :class:`~mongoengine.fields.ObjectIdField`
+* :class:`~mongoengine.fields.ReferenceField`
+* :class:`~mongoengine.fields.SequenceField`
+* :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
+---------------
+Each field type can be customized by keyword arguments.  The following keyword
+arguments can be set on all fields:
+
+:attr:`db_field` (Default: None)
+    The MongoDB 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
+    validated.
+
+:attr:`default` (Default: None)
+    A value to use when no value is set for this field.
+
+    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.fields.ListField` or :class:`~mongoengine.fields.DictField`)::
+
+        class ExampleFirst(Document):
+            # Default an empty list
+            values = ListField(IntField(), default=list)
+
+        class ExampleSecond(Document):
+            # Default a set of values
+            values = ListField(IntField(), default=lambda: [1,2,3])
+
+        class ExampleDangerous(Document):
+            # This can make an .append call to  add values to the default (and all the following objects),
+            # 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
+    field.
+
+:attr:`unique_with` (Default: None)
+    A field name (or list of field names) that when taken together with this
+    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.  `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. 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
+    human readable key ::
+
+        SIZE = (('S', 'Small'),
+                ('M', 'Medium'),
+                ('L', 'Large'),
+                ('XL', 'Extra Large'),
+                ('XXL', 'Extra Extra Large'))
+
+
+        class Shirt(Document):
+            size = StringField(max_length=3, choices=SIZE)
+
+    Or a flat iterable just containing values ::
+
+        SIZE = ('S', 'M', 'L', 'XL', 'XXL')
+
+        class Shirt(Document):
+            size = StringField(max_length=3, choices=SIZE)
+
+:attr:`**kwargs` (Optional)
+    You can supply additional metadata as arbitrary additional keyword
+    arguments.  You can not override existing attributes, however.  Common
+    choices include `help_text` and `verbose_name`, commonly used by form and
+    widget libraries.
+
+
+List fields
+-----------
+MongoDB allows storing lists of items. To add a list of items to a
+:class:`~mongoengine.Document`, use the :class:`~mongoengine.fields.ListField` field
+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):
+        tags = ListField(StringField(max_length=50))
+
+Embedded documents
+------------------
+MongoDB has the ability to embed documents within other documents. Schemata may
+be defined for these embedded documents, just as they may be for regular
+documents. To create an embedded document, just define a document as usual, but
+inherit from :class:`~mongoengine.EmbeddedDocument` rather than
+:class:`~mongoengine.Document`::
+
+    class Comment(EmbeddedDocument):
+        content = StringField()
+
+To embed the document within another document, use the
+:class:`~mongoengine.fields.EmbeddedDocumentField` field type, providing the embedded
+document class as the first argument::
+
+    class Page(Document):
+        comments = ListField(EmbeddedDocumentField(Comment))
+
+    comment1 = Comment(content='Good work!')
+    comment2 = Comment(content='Nice article!')
+    page = Page(comments=[comment1, comment2])
+
+Dictionary Fields
+-----------------
+Often, an embedded document may be used instead of a dictionary – generally
+embedded documents are recommended as dictionaries don’t support validation
+or custom field types. However, sometimes you will not know the structure of what you want to
+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)
+    response_form = ResponseForm(request.POST)
+    survey_response.answers = response_form.cleaned_data()
+    survey_response.save()
+
+Dictionaries can store complex data, other dictionaries, lists, references to
+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.fields.ReferenceField`. Pass in another document class as the
+first argument to the constructor, then simply assign document objects to the
+field::
+
+    class User(Document):
+        name = StringField()
+
+    class Page(Document):
+        content = StringField()
+        author = ReferenceField(User)
+
+    john = User(name="John Smith")
+    john.save()
+
+    post = Page(content="Test Page")
+    post.author = john
+    post.save()
+
+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.fields.ReferenceField` that references the document
+being defined, use the string ``'self'`` in place of the document class as the
+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::
+
+    class Employee(Document):
+        name = StringField()
+        boss = ReferenceField('self')
+        profile_page = ReferenceField('ProfilePage')
+
+    class ProfilePage(Document):
+        content = StringField()
+
+
+.. _one-to-many-with-listfields:
+
+One to Many with ListFields
+'''''''''''''''''''''''''''
+
+If you are implementing a one to many relationship via a list of references,
+then the references are stored as DBRefs and to query you need to pass an
+instance of the object to the query::
+
+    class User(Document):
+        name = StringField()
+
+    class Page(Document):
+        content = StringField()
+        authors = ListField(ReferenceField(User))
+
+    bob = User(name="Bob Jones").save()
+    john = User(name="John Smith").save()
+
+    Page(content="Test Page", authors=[bob, john]).save()
+    Page(content="Another Page", authors=[john]).save()
+
+    # Find all pages Bob authored
+    Page.objects(authors__in=[bob])
+
+    # 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
+'''''''''''''''''''''''''''''''''''''''''''
+By default, MongoDB doesn't check the integrity of your data, so deleting
+documents that other documents still hold references to will lead to consistency
+issues.  Mongoengine's :class:`ReferenceField` adds some functionality to
+safeguard against these kinds of database integrity problems, providing each
+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 ProfilePage(Document):
+        ...
+        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 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.
+
+Its value can take any of the following constants:
+
+:const:`mongoengine.DO_NOTHING`
+  This is the default and won't do anything.  Deletes are fast, but may cause
+  database inconsistency or dangling references.
+:const:`mongoengine.DENY`
+  Deletion is denied if there still exist references to the object being
+  deleted.
+:const:`mongoengine.NULLIFY`
+  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 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.fields.ListField` (:class:`~mongoengine.fields.ReferenceField`).
+
+
+.. warning::
+   A safety note on setting up these delete rules!  Since the delete rules are
+   not recorded on the database level by MongoDB itself, but instead at runtime,
+   in-memory, by the MongoEngine module, it is of the upmost importance
+   that the module that declares the relationship is loaded **BEFORE** the
+   delete is invoked.
+
+   If, for example, the :class:`Employee` object lives in the
+   :mod:`payroll` app, and the :class:`ProfilePage` in the :mod:`people`
+   app, it is extremely important that the :mod:`people` app is loaded
+   before any employee is removed, because otherwise, MongoEngine could
+   never know this relationship exists.
+
+   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.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::
+
+    class Link(Document):
+        url = StringField()
+
+    class Post(Document):
+        title = StringField()
+
+    class Bookmark(Document):
+        bookmark_object = GenericReferenceField()
+
+    link = Link(url='http://hmarr.com/mongoengine/')
+    link.save()
+
+    post = Post(title='Using MongoEngine')
+    post.save()
+
+    Bookmark(bookmark_object=link).save()
+    Bookmark(bookmark_object=post).save()
+
+.. note::
+
+   Using :class:`~mongoengine.fields.GenericReferenceField`\ s is slightly less
+   efficient than the standard :class:`~mongoengine.fields.ReferenceField`\ s, so if
+   you will only be referencing one document type, prefer the standard
+   :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.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.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::
+
+    class User(Document):
+        username = StringField(unique=True)
+        first_name = StringField()
+        last_name = StringField(unique_with='first_name')
+
+Skipping Document validation on save
+------------------------------------
+You can also skip the whole document validation process by setting
+``validate=False`` when calling the :meth:`~mongoengine.document.Document.save`
+method::
+
+    class Recipient(Document):
+        name = StringField()
+        email = EmailField()
+
+    recipient = Recipient(name='admin', email='root@localhost')
+    recipient.save()               # will raise a ValidationError while
+    recipient.save(validate=False) # won't
+
+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, 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
+set :attr:`collection` to the name of the collection that you want your
+document class to use::
+
+    class Page(Document):
+        title = StringField(max_length=200, required=True)
+        meta = {'collection': 'cmsPage'}
+
+Capped collections
+------------------
+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. :attr:`max_size` is rounded up to the next multiple of 256
+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::
+
+    class Log(Document):
+        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 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',  # text index
+                '#title',  # hashed index
+                ('title', '-rating'),
+                ('category', '_cls'),
+                {
+                    'fields': ['created'],
+                    'expireAfterSeconds': 3600
+                }
+            ]
+        }
+
+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:`cls` (Default: True)
+    If you have polymorphic models that inherit and have
+    :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 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::
+
+    Inheritance adds extra fields indices see: :ref:`document-inheritance`.
+
+Global index default options
+----------------------------
+
+There are a few top level defaults for all indexes that can be set::
+
+    class Page(Document):
+        title = StringField()
+        rating = StringField()
+        meta = {
+            'index_options': {},
+            'index_background': True,
+            'index_drop_dups': True,
+            'index_cls': False
+        }
+
+
+: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:`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.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.fields.DictField` or a custom field that contains a
+point. To create a geospatial index you must prefix the field with the
+***** sign. ::
+
+    class Place(Document):
+        location = DictField()
+        meta = {
+            'indexes': [
+                '*location.point',
+            ],
+        }
+
+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.now)
+        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
+:class:`~mongoengine.queryset.QuerySet` using the :attr:`ordering` attribute of
+:attr:`~mongoengine.Document.meta`.  Ordering will be applied when the
+:class:`~mongoengine.queryset.QuerySet` is created, and can be overridden by
+subsequent calls to :meth:`~mongoengine.queryset.QuerySet.order_by`. ::
+
+    from datetime import datetime
+
+    class BlogPost(Document):
+        title = StringField()
+        published_date = DateTimeField()
+
+        meta = {
+            'ordering': ['-published_date']
+        }
+
+    blog_post_1 = BlogPost(title="Blog Post #1")
+    blog_post_1.published_date = datetime(2010, 1, 5, 0, 0 ,0)
+
+    blog_post_2 = BlogPost(title="Blog Post #2")
+    blog_post_2.published_date = datetime(2010, 1, 6, 0, 0 ,0)
+
+    blog_post_3 = BlogPost(title="Blog Post #3")
+    blog_post_3.published_date = datetime(2010, 1, 7, 0, 0 ,0)
+
+    blog_post_1.save()
+    blog_post_2.save()
+    blog_post_3.save()
+
+    # get the "first" BlogPost using default ordering
+    # from BlogPost.meta.ordering
+    latest_post = BlogPost.objects.first()
+    assert latest_post.title == "Blog Post #3"
+
+    # override default ordering, order BlogPosts by "published_date"
+    first_post = BlogPost.objects.order_by("+published_date").first()
+    assert first_post.title == "Blog Post #1"
+
+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`.
+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 LogEntry(Document):
+        machine = StringField()
+        app = StringField()
+        timestamp = DateTimeField()
+        data = StringField()
+
+        meta = {
+            'shard_key': ('machine', 'timestamp',)
+        }
+
+.. _document-inheritance:
+
+Document inheritance
+====================
+
+To create a specialised type of a :class:`~mongoengine.Document` you have
+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 -- 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):
+        title = StringField(max_length=200, required=True)
+
+        meta = {'allow_inheritance': True}
+
+    # Also stored in the collection named 'page'
+    class DatedPage(Page):
+        date = DateTimeField()
+
+.. 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
+--------------------------
+As MongoEngine no longer defaults to needing :attr:`_cls`, you can quickly and
+easily get working with existing data.  Just define the document to match
+the expected schema in your database ::
+
+    # Will work with data in an existing collection named 'cmsPage'
+    class Page(Document):
+        title = StringField(max_length=200, required=True)
+        meta = {
+            'collection': 'cmsPage'
+        }
+
+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

@@ -0,0 +1,128 @@
+===================
+Documents instances
+===================
+To create a new document object, create an instance of the relevant document
+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")
+    >>> page.title
+    'Test Page'
+
+You may also assign values to the document's fields using standard object
+attribute syntax::
+
+    >>> page.title = "Example Page"
+    >>> page.title
+    'Example Page'
+
+Saving and deleting documents
+=============================
+MongoEngine tracks changes to documents to provide efficient saving.  To save
+the document to the database, call the :meth:`~mongoengine.Document.save` method.
+If the document does not exist in the database, it will be created. If it does
+already exist, then any changes will be updated atomically.  For example::
+
+    >>> page = Page(title="Test Page")
+    >>> page.save()  # Performs an insert
+    >>> page.title = "My Page"
+    >>> page.save()  # Performs an atomic set on the title field.
+
+.. note::
+
+    Changes to documents are tracked and on the whole perform ``set`` operations.
+
+    * ``list_field.push(0)`` --- *sets* the resulting 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.fields.ReferenceField` or
+:class:`~mongoengine.fields.GenericReferenceField` objects, then by default the
+:meth:`~mongoengine.Document.save` method will not save any changes to
+those objects.  If you want all references to be saved also, noting each
+save is a separate query, then passing :attr:`cascade` as True
+to the save method will cascade any saves.
+
+Deleting documents
+------------------
+To delete a document, call the :meth:`~mongoengine.Document.delete` method.
+Note that this will only work if the document exists in the database and has a
+valid :attr:`id`.
+
+Document IDs
+============
+Each document in the database has a unique id. This may be accessed through the
+:attr:`id` attribute on :class:`~mongoengine.Document` objects. Usually, the id
+will be generated automatically by the database server when the object is save,
+meaning that you may only access the :attr:`id` field once a document has been
+saved::
+
+    >>> page = Page(title="Test Page")
+    >>> page.id
+    >>> page.save()
+    >>> page.id
+    ObjectId('123456789abcdef000000000')
+
+Alternatively, you may define one of your own fields to be the document's
+"primary key" by providing ``primary_key=True`` as a keyword argument to a
+field's constructor. Under the hood, MongoEngine will use this field as the
+:attr:`id`; in fact :attr:`id` is actually aliased to your primary key field so
+you may still use :attr:`id` to access the primary key if you want::
+
+    >>> class User(Document):
+    ...     email = StringField(primary_key=True)
+    ...     name = StringField()
+    ...
+    >>> bob = User(email='bob@example.com', name='Bob')
+    >>> bob.save()
+    >>> bob.id == bob.email == 'bob@example.com'
+    True
+
+You can also access the document's "primary key" using the :attr:`pk` field,
+it's an alias to :attr:`id`::
+
+    >>> page = Page(title="Another Test Page")
+    >>> page.save()
+    >>> page.id == page.pk
+    True
+
+.. note::
+
+   If you define your own primary key field, the field implicitly becomes
+   required, so a :class:`~mongoengine.ValidationError` will be thrown if
+   you don't provide it.

docs/guide/gridfs.rst

@@ -0,0 +1,74 @@
+======
+GridFS
+======
+
+.. versionadded:: 0.4
+
+Writing
+-------
+
+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,
+a document is created to store details about animals, including a photo::
+
+    class Animal(Document):
+        genus = StringField()
+        family = StringField()
+        photo = FileField()
+
+    marmot = Animal(genus='Marmota', family='Sciuridae')
+
+    marmot_photo = open('marmot.jpg', 'rb')
+    marmot.photo.put(marmot_photo, content_type = 'image/jpeg')
+    marmot.save()
+
+Retrieval
+---------
+
+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()
+    photo = marmot.photo.read()
+    content_type = marmot.photo.content_type
+
+Streaming
+---------
+
+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`::
+
+    marmot.photo.new_file()
+    marmot.photo.write('some_image_data')
+    marmot.photo.write('some_more_image_data')
+    marmot.photo.close()
+
+    marmot.save()
+
+Deletion
+--------
+
+Deleting stored files is achieved with the :func:`delete` method::
+
+    marmot.photo.delete()
+
+.. warning::
+
+    The FileField in a Document actually only stores the ID of a file in a
+    separate GridFS collection. This means that deleting a document
+    with a defined FileField does not actually delete the file. You must be
+    careful to delete any files in a Document as above before deleting the
+    Document itself.
+
+
+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', 'rb')
+    marmot.photo.replace(another_marmot, content_type='image/png')

docs/guide/index.rst

@@ -0,0 +1,16 @@
+==========
+User Guide
+==========
+
+.. toctree::
+   :maxdepth: 2
+
+   installing
+   connecting
+   defining-documents
+   document-instances
+   querying
+   gridfs
+   signals
+   text-indexes
+   mongomock

docs/guide/installing.rst

@@ -0,0 +1,31 @@
+======================
+Installing MongoEngine
+======================
+
+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 you can use :program:`pip`:
+
+.. code-block:: console
+
+    $ pip install mongoengine
+
+Alternatively, if you don't have setuptools installed, `download it from PyPi
+<http://pypi.python.org/pypi/mongoengine/>`_ and run
+
+.. code-block:: console
+
+    $ python setup.py install
+
+To use the bleeding-edge version of MongoEngine, you can get the source from
+`GitHub <http://github.com/mongoengine/mongoengine/>`_ and install it as above:
+
+.. code-block:: console
+
+    $ 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

@@ -0,0 +1,674 @@
+=====================
+Querying the database
+=====================
+:class:`~mongoengine.Document` classes have an :attr:`objects` attribute, which
+is used for accessing the objects in the database associated with the class.
+The :attr:`objects` attribute is actually a
+:class:`~mongoengine.queryset.QuerySetManager`, which creates and returns a new
+:class:`~mongoengine.queryset.QuerySet` object on access. The
+:class:`~mongoengine.queryset.QuerySet` object may be iterated over to
+fetch documents from the database::
+
+    # Prints out the names of all the users in the database
+    for user in User.objects:
+        print user.name
+
+.. note::
+
+    As of MongoEngine 0.8 the querysets utilise a local cache.  So iterating
+    it multiple times will only cause a single query.  If this is not the
+    desired behaviour you can call :class:`~mongoengine.QuerySet.no_cache`
+    (version **0.8.3+**) to return a non-caching queryset.
+
+Filtering queries
+=================
+The query may be filtered by calling the
+:class:`~mongoengine.queryset.QuerySet` object with field lookup keyword
+arguments. The keys in the keyword arguments correspond to fields on the
+:class:`~mongoengine.Document` you are querying::
+
+    # This will return a QuerySet that will only iterate over users whose
+    # 'country' field is set to 'uk'
+    uk_users = User.objects(country='uk')
+
+Fields on embedded documents may also be referred to using field lookup syntax
+by using a double-underscore in place of the dot in object attribute access
+syntax::
+
+    # This will return a QuerySet that will only iterate over pages that have
+    # 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
+operator name to a key with a double-underscore::
+
+    # Only find users whose age is 18 or less
+    young_users = Users.objects(age__lte=18)
+
+Available operators are as follows:
+
+* ``ne`` -- not equal to
+* ``lt`` -- less than
+* ``lte`` -- less than or equal to
+* ``gt`` -- greater than
+* ``gte`` -- greater than or equal to
+* ``not`` -- negate a standard check, may be used before other operators (e.g.
+  ``Q(age__not__mod=5)``)
+* ``in`` -- value is in list (a list of values should be provided)
+* ``nin`` -- value is not in list (a list of values should be provided)
+* ``mod`` -- ``value % x == y``, where ``x`` and ``y`` are two provided values
+* ``all`` -- every item in list of values provided is in array
+* ``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:
+
+* ``exact`` -- string field exactly matches value
+* ``iexact`` -- string field exactly matches value (case insensitive)
+* ``contains`` -- string field contains value
+* ``icontains`` -- string field contains value (case insensitive)
+* ``startswith`` -- string field starts with value
+* ``istartswith`` -- string field starts with value (case insensitive)
+* ``endswith`` -- string field ends with value
+* ``iendswith`` -- string field ends with value (case insensitive)
+* ``match``  -- performs an $elemMatch so you can match an entire document within an array
+
+
+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
+  (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
+* ``within_box`` -- filter documents to those within a given bounding box (e.g.
+  [(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.fields.ListField`, a single item may be provided, in which case
+lists that contain that item will be matched::
+
+    class Page(Document):
+        tags = ListField(StringField())
+
+    # This will match all pages that have the word 'coding' as an item in the
+    # 'tags' list
+    Page.objects(tags='coding')
+
+It is possible to query by position in a list by using a numerical value as a
+query operator. So if you wanted to find all pages whose first tag was ``db``,
+you could use the following query::
+
+    Page.objects(tags__0='db')
+
+If you only want to fetch part of a list eg: you want to paginate a list, then
+the `slice` operator is required::
+
+    # comments - skip 5, limit 10
+    Page.objects.fields(slice__comments=[5, 10])
+
+For updating documents, if you don't know the position in a list, you can use
+the $ positional operator ::
+
+    Post.objects(comments__by="joe").update(**{'inc__comments__$__votes': 1})
+
+However, this doesn't map well to the syntax so you can also use a capital S instead ::
+
+    Post.objects(comments__by="joe").update(inc__comments__S__votes=1)
+
+.. 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 :mod:`PyMongo` query as a query parameter, which will
+be integrated directly into the query. This is done using the ``__raw__``
+keyword argument::
+
+    Page.objects(__raw__={'tags': 'coding'})
+
+.. versionadded:: 0.4
+
+Limiting and skipping results
+=============================
+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 `array-slicing` syntax
+is preferred for achieving this::
+
+    # Only the first 5 people
+    users = User.objects[:5]
+
+    # All except for the first 5 people
+    users = User.objects[5:]
+
+    # 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
+index does not exists, an :class:`IndexError` will be raised. A shortcut for
+retrieving the first result and returning :attr:`None` if no result exists is
+provided (:meth:`~mongoengine.queryset.QuerySet.first`)::
+
+    >>> # Make sure there are no users
+    >>> User.drop_collection()
+    >>> User.objects[0]
+    IndexError: list index out of range
+    >>> User.objects.first() == None
+    True
+    >>> User(name='Test User').save()
+    >>> User.objects[0] == User.objects.first()
+    True
+
+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, and
+: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, get_or_create() existed, but it was unsafe. It
+could not be made safe, because there are no transactions in mongoDB. Other
+approaches should be investigated, to ensure you don't accidentally duplicate
+data when using something similar to this method. Therefore it was deprecated
+in 0.8 and removed in 0.10.
+
+Default Document queries
+========================
+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
+arguments -- :attr:`doc_cls` and :attr:`queryset`. The first argument is the
+:class:`~mongoengine.Document` class that the method is defined on (in this
+sense, the method is more like a :func:`classmethod` than a regular method),
+and the second argument is the initial queryset. The method needs to be
+decorated with :func:`~mongoengine.queryset.queryset_manager` in order for it
+to be recognised. ::
+
+    class BlogPost(Document):
+        title = StringField()
+        date = DateTimeField()
+
+        @queryset_manager
+        def objects(doc_cls, queryset):
+            # This may actually also be done by defining a default ordering for
+            # the document, but this illustrates the use of manager methods
+            return queryset.order_by('-date')
+
+You don't need to call your method :attr:`objects` -- you may define as many
+custom manager methods as you like::
+
+    class BlogPost(Document):
+        title = StringField()
+        published = BooleanField()
+
+        @queryset_manager
+        def live_posts(doc_cls, queryset):
+            return queryset.filter(published=True)
+
+    BlogPost(title='test1', published=False).save()
+    BlogPost(title='test2', published=True).save()
+    assert len(BlogPost.objects) == 2
+    assert len(BlogPost.live_posts()) == 1
+
+Custom QuerySets
+================
+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 AwesomerQuerySet(QuerySet):
+
+        def get_awesome(self):
+            return self.filter(awesome=True)
+
+    class Page(Document):
+        meta = {'queryset_class': AwesomerQuerySet}
+
+    # To call:
+    Page.objects.get_awesome()
+
+.. versionadded:: 0.4
+
+Aggregation
+===========
+MongoDB provides some aggregation methods out of the box, but there are not as
+many as you typically get with an RDBMS. MongoEngine provides a wrapper around
+the built-in methods and provides some of its own, which are implemented as
+Javascript code that is executed on the database server.
+
+Counting results
+----------------
+Just as with limiting and skipping results, there is a method on a
+:class:`~mongoengine.queryset.QuerySet` object --
+:meth:`~mongoengine.queryset.QuerySet.count`::
+
+    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
+-------------------
+You may sum over the values of a specific field on documents using
+:meth:`~mongoengine.queryset.QuerySet.sum`::
+
+    yearly_expense = Employee.objects.sum('salary')
+
+.. note::
+
+   If the field isn't present on a document, that document will be ignored from
+   the sum.
+
+To get the average (mean) of a field on a collection of documents, use
+:meth:`~mongoengine.queryset.QuerySet.average`::
+
+    mean_age = User.objects.average('age')
+
+As MongoDB provides native lists, MongoEngine provides a helper method to get a
+dictionary of the frequencies of items in lists across an entire collection --
+:meth:`~mongoengine.queryset.QuerySet.item_frequencies`. An example of its use
+would be generating "tag-clouds"::
+
+    class Article(Document):
+        tag = ListField(StringField())
+
+    # After adding some tagged articles...
+    tag_freqs = Article.objects.item_frequencies('tag', normalize=True)
+
+    from operator import itemgetter
+    top_tags = sorted(tag_freqs.items(), key=itemgetter(1), reverse=True)[:10]
+
+
+Query efficiency and performance
+================================
+
+There are a couple of methods to improve efficiency when querying, reducing the
+information returned by the query or efficient dereferencing .
+
+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.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
+retrieve as its arguments. Note that if fields that are not downloaded are
+accessed, their default value (or :attr:`None` if no default value is provided)
+will be given::
+
+    >>> class Film(Document):
+    ...     title = StringField()
+    ...     year = IntField()
+    ...     rating = IntField(default=3)
+    ...
+    >>> Film(title='The Shawshank Redemption', year=1994, rating=5).save()
+    >>> f = Film.objects.only('title').first()
+    >>> f.title
+    'The Shawshank Redemption'
+    >>> f.year   # None
+    >>> f.rating # default value
+    3
+
+.. note::
+
+    The :meth:`~mongoengine.queryset.QuerySet.exclude` is the opposite of
+    :meth:`~mongoengine.queryset.QuerySet.only` if you want to exclude a field.
+
+If you later need the missing fields, just call
+:meth:`~mongoengine.Document.reload` on your document.
+
+Getting related data
+--------------------
+
+When iterating the results of :class:`~mongoengine.fields.ListField` or
+: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.fields.ReferenceField` objects or
+: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
+:func:`~mongoengine.queryset.QuerySet.select_related` which converts the
+QuerySet to a list and dereferences as efficiently as possible.  By default
+:func:`~mongoengine.queryset.QuerySet.select_related` only dereferences any
+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
+possible in MongoEngine through the :class:`~mongoengine.queryset.Q` class.
+A :class:`~mongoengine.queryset.Q` object represents part of a query, and
+can be initialised using the same keyword-argument syntax you use to query
+documents. To build a complex query, you may combine
+:class:`~mongoengine.queryset.Q` objects using the ``&`` (and) and ``|`` (or)
+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`,
+:meth:`~mongoengine.queryset.QuerySet.update` and
+:meth:`~mongoengine.queryset.QuerySet.modify` methods on a
+: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)
+* ``inc`` -- increment a value by a given amount
+* ``dec`` -- decrement a value by a given amount
+* ``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 `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::
+
+    >>> post = BlogPost(title='Test', page_views=0, tags=['database'])
+    >>> post.save()
+    >>> BlogPost.objects(id=post.id).update_one(inc__page_views=1)
+    >>> post.reload()  # the document has been changed, so we need to reload it
+    >>> post.page_views
+    1
+    >>> BlogPost.objects(id=post.id).update_one(set__title='Example Post')
+    >>> post.reload()
+    >>> post.title
+    'Example Post'
+    >>> BlogPost.objects(id=post.id).update_one(push__tags='nosql')
+    >>> post.reload()
+    >>> post.tags
+    ['database', 'nosql']
+
+.. note::
+
+    If no modifier operator is specified the default will be ``$set``. So the following sentences are identical::
+
+        >>> BlogPost.objects(id=post.id).update(title='Example Post')
+        >>> BlogPost.objects(id=post.id).update(set__title='Example Post')
+
+.. note::
+
+    In version 0.5 the :meth:`~mongoengine.Document.save` runs atomic updates
+    on changed documents by tracking changes to that document.
+
+The positional operator allows you to update list items without knowing the
+index position, therefore making the update a single atomic operation.  As we
+cannot use the `$` syntax in keyword arguments it has been mapped to `S`::
+
+    >>> post = BlogPost(title='Test', page_views=0, tags=['database', 'mongo'])
+    >>> post.save()
+    >>> BlogPost.objects(id=post.id, tags='mongo').update(set__tags__S='mongodb')
+    >>> post.reload()
+    >>> post.tags
+    ['database', 'mongodb']
+
+.. note::
+    Currently only top level lists are handled, future versions of mongodb /
+    pymongo plan to support nested positional operators.  See `The $ positional
+    operator <http://www.mongodb.org/display/DOCS/Updating#Updating-The%24positionaloperator>`_.
+
+Server-side javascript execution
+================================
+Javascript functions may be written and sent to the server for execution. The
+result of this is the return value of the Javascript function. This
+functionality is accessed through the
+:meth:`~mongoengine.queryset.QuerySet.exec_js` method on
+:meth:`~mongoengine.queryset.QuerySet` objects. Pass in a string containing a
+Javascript function as the first argument.
+
+The remaining positional arguments are names of fields that will be passed into
+you Javascript function as its arguments. This allows functions to be written
+that may be executed on any field in a collection (e.g. the
+:meth:`~mongoengine.queryset.QuerySet.sum` method, which accepts the name of
+the field to sum over as its argument). Note that field names passed in in this
+manner are automatically translated to the names used on the database (set
+using the :attr:`name` keyword argument to a field constructor).
+
+Keyword arguments to :meth:`~mongoengine.queryset.QuerySet.exec_js` are
+combined into an object called :attr:`options`, which is available in the
+Javascript function. This may be used for defining specific parameters for your
+function.
+
+Some variables are made available in the scope of the Javascript function:
+
+* ``collection`` -- the name of the collection that corresponds to the
+  :class:`~mongoengine.Document` class that is being used; this should be
+  used to get the :class:`Collection` object from :attr:`db` in Javascript
+  code
+* ``query`` -- the query that has been generated by the
+  :class:`~mongoengine.queryset.QuerySet` object; this may be passed into
+  the :meth:`find` method on a :class:`Collection` object in the Javascript
+  function
+* ``options`` -- an object containing the keyword arguments passed into
+  :meth:`~mongoengine.queryset.QuerySet.exec_js`
+
+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 through
+:meth:`~mongoengine.queryset.QuerySet.sum` but is shown here for sake of
+example)::
+
+    def sum_field(document, field_name, include_negatives=True):
+        code = """
+        function(sumField) {
+            var total = 0.0;
+            db[collection].find(query).forEach(function(doc) {
+                var val = doc[sumField];
+                if (val >= 0.0 || options.includeNegatives) {
+                    total += val;
+                }
+            });
+            return total;
+        }
+        """
+        options = {'includeNegatives': include_negatives}
+        return document.objects.exec_js(code, field_name, **options)
+
+As fields in MongoEngine may use different names in the database (set using the
+:attr:`db_field` keyword argument to a :class:`Field` constructor), a mechanism
+exists for replacing MongoEngine field names with the database field names in
+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.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::
+
+    class Comment(EmbeddedDocument):
+        content = StringField(db_field='body')
+
+    class BlogPost(Document):
+        title = StringField(db_field='doctitle')
+        comments = ListField(EmbeddedDocumentField(Comment), name='cs')
+
+    # Returns a list of dictionaries. Each dictionary contains a value named
+    # "document", which corresponds to the "title" field on a BlogPost, and
+    # "comment", which corresponds to an individual comment. The substitutions
+    # made are shown in the comments.
+    BlogPost.objects.exec_js("""
+    function() {
+        var comments = [];
+        db[collection].find(query).forEach(function(doc) {
+            // doc[~comments] -> doc["cs"]
+            var docComments = doc[~comments];
+
+            for (var i = 0; i < docComments.length; i++) {
+                // doc[~comments][i] -> doc["cs"][i]
+                var comment = doc[~comments][i];
+
+                comments.push({
+                    // doc[~title] -> doc["doctitle"]
+                    'document': doc[~title],
+
+                    // comment[~comments.content] -> comment["body"]
+                    'comment': comment[~comments.content]
+                });
+            }
+        });
+        return comments;
+    }
+    """)

docs/guide/signals.rst

@@ -0,0 +1,145 @@
+.. _signals:
+
+=======
+Signals
+=======
+
+.. versionadded:: 0.5
+
+.. note::
+
+  Signal support is provided by the excellent `blinker`_ library. If you wish
+  to enable signal support this library must be installed, though it is not
+  required for MongoEngine to function.
+
+Overview
+--------
+
+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.
+
+Available signals include:
+
+`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 all actions
+  (validation, insert/update, cascades, 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()
+
+        @classmethod
+        def pre_save(cls, sender, document, **kwargs):
+            logging.debug("Pre Save: %s" % document.name)
+
+        @classmethod
+        def post_save(cls, sender, document, **kwargs):
+            logging.debug("Post Save: %s" % document.name)
+            if 'created' in kwargs:
+                if kwargs['created']:
+                    logging.debug("Created")
+                else:
+                    logging.debug("Updated")
+
+    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', "$content"],
+           'default_language': 'english',
+           'weights': {'title': 10, 'content': 2}
+          }
+      ]}
+
+
+
+Querying
+========
+
+Saving a document::
+
+  News(title="Using mongodb text search",
+       content="Testing text search").save()
+
+  News(title="MongoEngine 0.9 released",
+       content="Various improvements").save()
+
+Next, start a text search using :attr:`QuerySet.search_text` method::
+  
+  document = News.objects.search_text('testing').first()
+  document.title # may be: "Using mongodb text search"
+  
+  document = News.objects.search_text('released').first()
+  document.title # may be: "MongoEngine 0.9 released"
+
+
+Ordering by text score
+======================
+
+::
+
+  objects = News.objects.search('mongo').order_by('$text_score')

docs/index.rst

@@ -1,26 +1,84 @@
+==============================
 MongoEngine User Documentation
-=======================================
+==============================
 
-MongoEngine is an Object-Document Mapper, written in Python for working with 
+**MongoEngine** is an Object-Document Mapper, written in Python for working with
 MongoDB. To install it, simply run
 
 .. code-block:: console
 
-    # easy_install mongoengine
+    $ pip install -U mongoengine
+
+:doc:`tutorial`
+  A quick tutorial building a tumblelog to get you up and running with
+  MongoEngine.
+
+:doc:`guide/index`
+  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 innards of documents, querysets and fields.
+
+:doc:`upgrade`
+  How to upgrade MongoEngine.
+
+:doc:`django`
+  Using MongoEngine and Django
+
+Community
+---------
+
+To get help with using MongoEngine, use the `MongoEngine Users mailing list
+<http://groups.google.com/group/mongoengine-users>`_ or the ever popular
+`stackoverflow <http://www.stackoverflow.com>`_.
+
+Contributing
+------------
+
+**Yes please!**  We are always looking for contributions, additions and improvements.
+
+The source is available on `GitHub <http://github.com/MongoEngine/mongoengine>`_
+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.
 
-The source is available on `GitHub <http://github.com/hmarr/mongoengine>`_.
 
 .. toctree::
-   :maxdepth: 2
+    :maxdepth: 1
+    :numbered:
+    :hidden:
 
-   tutorial
+    tutorial
-   userguide
+    guide/index
-   apireference
+    apireference
-   changelog
+    changelog
+    upgrade
+    django
 
 Indices and tables
-==================
+------------------
 
 * :ref:`genindex`
+* :ref:`modindex`
 * :ref:`search`
 

docs/tutorial.rst

@@ -1,73 +1,83 @@
 ========
 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
+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
 individual posts, we would put a column in the comments table that contained a
-foreign key to the posts table.  We'd also need a link table to provide the
+foreign key to the posts table. We'd also need a link table to provide the
 many-to-many relationship between posts and tags. Then we'd need to address the
 problem of storing the specialised post-types (text, image and link). There are
 several ways we can achieve this, but each of them have their problems --- none
@@ -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):
@@ -121,16 +136,19 @@ 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
@@ -152,21 +170,41 @@ We can then store a list of comment documents in our post document::
         tags = ListField(StringField(max_length=30))
         comments = ListField(EmbeddedDocumentField(Comment))
 
+Handling deletions of references
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+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::
+
+    class Post(Document):
+        title = StringField(max_length=120, required=True)
+        author = ReferenceField(User, reverse_delete_rule=CASCADE)
+        tags = ListField(StringField(max_length=30))
+        comments = ListField(EmbeddedDocumentField(Comment))
+
+See :class:`~mongoengine.fields.ReferenceField` for more information.
+
+.. note::
+    MapFields and DictFields currently don't support automatic handling of
+    deleted references
+
+
 Adding data to our Tumblelog
 ============================
 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::
 
@@ -175,16 +213,17 @@ Now that we've got our user in the database, let's add a couple of posts::
     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
@@ -192,16 +231,17 @@ 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:
@@ -218,22 +258,21 @@ 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
@@ -241,7 +280,7 @@ 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
@@ -250,5 +289,11 @@ 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 % 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

@@ -0,0 +1,600 @@
+#########
+Upgrading
+#########
+
+Development
+***********
+(Fill this out whenever you introduce breaking changes to MongoEngine)
+
+
+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
+cascading saves then either set it in the `meta` or pass
+via `save` eg ::
+
+    # At the class level:
+    class Person(Document):
+        meta = {'cascade': True}
+
+    # Or in code:
+    my_document.save(cascade=True)
+
+.. note::
+    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`
+will be raised.
+
+
+To explicitly continue to use DBRefs change the `dbref` flag
+to True ::
+
+   class Person(Document):
+       groups = ListField(ReferenceField(Group, dbref=True))
+
+To migrate to using strings instead of DBRefs you will have to manually
+migrate ::
+
+        # Step 1 - Migrate the model definition
+        class Group(Document):
+            author = ReferenceField(User, dbref=False)
+            members = ListField(ReferenceField(User, dbref=False))
+
+        # Step 2 - Migrate the data
+        for g in Group.objects():
+            g.author = g.author
+            g.members = g.members
+            g.save()
+
+
+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
+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.
+
+Reverse Delete Rules in Embedded Documents, MapFields and DictFields now throw
+an InvalidDocument error as they aren't currently supported.
+
+Document._get_subclasses - Is no longer used and the class method has been
+removed.
+
+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 :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
+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.
+
+More methods now use map_reduce as db.eval is not supported for sharding as
+such the following have been changed:
+
+    * :meth:`~mongoengine.queryset.QuerySet.sum`
+    * :meth:`~mongoengine.queryset.QuerySet.average`
+    * :meth:`~mongoengine.queryset.QuerySet.item_frequencies`
+
+
+Default collection naming
+=========================
+
+Previously it was just lowercase, it's now much more pythonic and readable as
+it's lowercase and underscores, previously ::
+
+    class MyAceDocument(Document):
+        pass
+
+    MyAceDocument._meta['collection'] == myacedocument
+
+In 0.5 this will change to ::
+
+    class MyAceDocument(Document):
+        pass
+
+    MyAceDocument._get_collection_name() == my_ace_document
+
+To upgrade use a Mixin class to set meta like so ::
+
+    class BaseMixin(object):
+        meta = {
+            'collection': lambda c: c.__name__.lower()
+        }
+
+    class MyAceDocument(Document, BaseMixin):
+        pass
+
+    MyAceDocument._get_collection_name() == "myacedocument"
+
+Alternatively, you can rename your collections eg ::
+
+    from mongoengine.connection import _get_db
+    from mongoengine.base import _document_registry
+
+    def rename_collections():
+        db = _get_db()
+
+        failure = False
+
+        collection_names = [d._get_collection_name()
+                            for d in _document_registry.values()]
+
+        for new_style_name in collection_names:
+            if not new_style_name:  # embedded documents don't have collections
+                continue
+            old_style_name = new_style_name.replace('_', '')
+
+            if old_style_name == new_style_name:
+                continue  # Nothing to do
+
+            existing = db.collection_names()
+            if old_style_name in existing:
+                if new_style_name in existing:
+                    failure = True
+                    print "FAILED to rename: %s to %s (already exists)" % (
+                        old_style_name, new_style_name)
+                else:
+                    db[old_style_name].rename(new_style_name)
+                    print "Renamed:  %s to %s" % (old_style_name,
+                                                  new_style_name)
+
+        if failure:
+            print "Upgrading  collection names failed"
+        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.

docs/userguide.rst

@@ -1,385 +0,0 @@
-==========
-User Guide
-==========
-
-.. _guide-connecting:
-
-Installing
-==========
-MongoEngine is available on PyPI, so to use it you can use 
-:program:`easy_install`
-    
-.. code-block:: console
-
-    # easy_install mongoengine
-
-Alternatively, if you don't have setuptools installed, `download it from PyPi 
-<http://pypi.python.org/pypi/mongoengine/>`_ and run
-
-.. code-block:: console
-
-    # python setup.py install
-
-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
-the database requires authentication, :attr:`username` and :attr:`password`
-arguments may be provided::
-
-    from mongoengine import connect
-    connect('project1', username='webapp', password='pwd123')
-
-By default, MongoEngine assumes that the :program:`mongod` instance is running
-on **localhost** on port **27017**. If MongoDB is running elsewhere, you may
-provide :attr:`host` and :attr:`port` arguments to
-:func:`~mongoengine.connect`::
-
-    connect('project1', host='192.168.1.35', port=12345)
-
-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 
-is enforced at a database level. 
-
-Defining a document's schema
-----------------------------
-MongoEngine allows you to define schemata for documents as this helps to reduce
-coding errors, and allows for utility methods to be defined on fields which may
-be present. 
-
-To define a schema for a document, create a class that inherits from
-:class:`~mongoengine.Document`. Fields are specified by adding **field
-objects** as class attributes to the document class::
-
-    from mongoengine import *
-    import datetime
-    
-    class Page(Document):
-        title = StringField(max_length=200, required=True)
-        date_modified = DateTimeField(default=datetime.now)
-
-Fields
-------
-By default, fields are not required. To make a field mandatory, set the
-:attr:`required` keyword argument of a field to ``True``. Fields also may have
-validation constraints available (such as :attr:`max_length` in the example
-above). Fields may also take default values, which will be used if a value is
-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.StringField`
-* :class:`~mongoengine.IntField`
-* :class:`~mongoengine.FloatField`
-* :class:`~mongoengine.DateTimeField`
-* :class:`~mongoengine.ListField`
-* :class:`~mongoengine.ObjectIdField`
-* :class:`~mongoengine.EmbeddedDocumentField`
-* :class:`~mongoengine.ReferenceField`
-
-List fields
-^^^^^^^^^^^
-MongoDB allows the storage of lists of items. To add a list of items to a
-:class:`~mongoengine.Document`, use the :class:`~mongoengine.ListField` field
-type. :class:`~mongoengine.ListField` takes another field object as its first
-argument, which specifies which type elements may be stored within the list::
-
-    class Page(Document):
-        tags = ListField(StringField(max_length=50))
-
-Embedded documents
-^^^^^^^^^^^^^^^^^^
-MongoDB has the ability to embed documents within other documents. Schemata may
-be defined for these embedded documents, just as they may be for regular
-documents. To create an embedded document, just define a document as usual, but
-inherit from :class:`~mongoengine.EmbeddedDocument` rather than 
-:class:`~mongoengine.Document`::
-
-    class Comment(EmbeddedDocument):
-        content = StringField()
-
-To embed the document within another document, use the
-:class:`~mongoengine.EmbeddedDocumentField` field type, providing the embedded
-document class as the first argument::
-
-    class Page(Document):
-        comments = ListField(EmbeddedDocumentField(Comment))
-
-    comment1 = Comment('Good work!')
-    comment2 = Comment('Nice article!')
-    page = Page(comments=[comment1, comment2])
-
-Reference fields
-^^^^^^^^^^^^^^^^
-References may be stored to other documents in the database using the
-:class:`~mongoengine.ReferenceField`. Pass in another document class as the
-first argument to the constructor, then simply assign document objects to the
-field::
-    
-    class User(Document):
-        name = StringField()
-
-    class Page(Document):
-        content = StringField()
-        author = ReferenceField(User)
-
-    john = User(name="John Smith")
-    john.save()
-
-    post = Page(content="Test Page")
-    post.author = john
-    post.save()
-
-The :class:`User` object is automatically turned into a reference behind the
-scenes, and dereferenced when the :class:`Page` object is retrieved.
-
-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
-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
-set :attr:`collection` to the name of the collection that you want your
-document class to use::
-
-    class Page(Document):
-        title = StringField(max_length=200, required=True)
-        meta = {'collection': 'cmsPage'}
-
-Capped collections
-^^^^^^^^^^^^^^^^^^
-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
-:attr:`max_documents` is, :attr:`max_size` defaults to 10000000 bytes (10MB).
-The following example shows a :class:`Log` document that will be limited to 
-1000 entries and 2MB of disk space::
-
-    class Log(Document):
-        ip_address = StringField()
-        meta = {'max_documents': 1000, 'max_size': 2000000}
-
-Document inheritance
---------------------
-To create a specialised type of a :class:`~mongoengine.Document` you have
-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::
-
-    # Stored in a collection named 'page'
-    class Page(Document):
-        title = StringField(max_length=200, required=True)
-
-    # Also stored in the collection named 'page'
-    class DatedPage(Page):
-        date = DateTimeField()
-
-Working with existing data
-^^^^^^^^^^^^^^^^^^^^^^^^^^
-To enable correct retrieval of documents involved in this kind of heirarchy,
-two extra attributes are stored on each document in the database: :attr:`_cls`
-and :attr:`_types`. These are hidden from the user through the MongoEngine
-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',
-            'allow_inheritance': False,
-        }
-
-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.
-You may provide values for any of the fields on the document::
-    
-    >>> page = Page(title="Test Page")
-    >>> page.title
-    'Test Page'
-
-You may also assign values to the document's fields using standard object 
-attribute syntax::
-
-    >>> page.title = "Example Page"
-    >>> page.title
-    'Example Page'
-
-Saving and deleting documents
------------------------------
-To save the document to the database, call the
-:meth:`~mongoengine.Document.save` method. If the document does not exist in
-the database, it will be created. If it does already exist, it will be
-updated.
-
-To delete a document, call the :meth:`~mongoengine.Document.delete` method.
-Note that this will only work if the document exists in the database and has a
-valide :attr:`id`.
-
-Document IDs
-------------
-Each document in the database has a unique id. This may be accessed through the
-:attr:`id` attribute on :class:`~mongoengine.Document` objects. Usually, the id
-will be generated automatically by the database server when the object is save,
-meaning that you may only access the :attr:`id` field once a document has been
-saved::
-
-    >>> page = Page(title="Test Page")
-    >>> page.id
-    >>> page.save()
-    >>> page.id
-    ObjectId('123456789abcdef000000000')
-
-Alternatively, you may explicitly set the :attr:`id` before you save the
-document, but the id must be a valid PyMongo :class:`ObjectId`.
-
-Querying the database
-=====================
-:class:`~mongoengine.Document` classes have an :attr:`objects` attribute, which
-is used for accessing the objects in the database associated with the class.
-The :attr:`objects` attribute is actually a
-:class:`~mongoengine.queryset.QuerySetManager`, which creates and returns a new
-a new :class:`~mongoengine.queryset.QuerySet` object on access. The
-:class:`~mongoengine.queryset.QuerySet` object may may be iterated over to
-fetch documents from the database::
-
-    # Prints out the names of all the users in the database
-    for user in User.objects:
-        print user.name
-
-Filtering queries
------------------
-The query may be filtered by calling the
-:class:`~mongoengine.queryset.QuerySet` object with field lookup keyword 
-arguments. The keys in the keyword arguments correspond to fields on the
-:class:`~mongoengine.Document` you are querying::
-
-    # This will return a QuerySet that will only iterate over users whose
-    # 'country' field is set to 'uk'
-    uk_users = User.objects(country='uk')
-
-Fields on embedded documents may also be referred to using field lookup syntax
-by using a double-underscore in place of the dot in object attribute access
-syntax::
-    
-    # This will return a QuerySet that will only iterate over pages that have
-    # been written by a user whose 'country' field is set to 'uk'
-    uk_pages = Page.objects(author__country='uk')
-
-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
-lists that contain that item will be matched::
-
-    class Page(Document):
-        tags = ListField(StringField())
-
-    # This will match all pages that have the word 'coding' as an item in the
-    # 'tags' list
-    Page.objects(tags='coding')
-
-Query operators
----------------
-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
-    young_users = Users.objects(age__lte=18)
-
-Available operators are as follows:
-
-* ``neq`` -- not equal to
-* ``lt`` -- less than
-* ``lte`` -- less than or equal to
-* ``gt`` -- greater than
-* ``gte`` -- greater than or equal to
-* ``in`` -- value is in list (a list of values should be provided)
-* ``nin`` -- value is not in list (a list of values should be provided)
-* ``mod`` -- ``value % x == y``, where ``x`` and ``y`` are two provided values
-* ``all`` -- every item in array is in list of values provided
-* ``size`` -- the size of the array is 
-* ``exists`` -- value for field exists
-
-Limiting and skipping results
------------------------------
-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
-achieving this is using array-slicing syntax::
-
-    # Only the first 5 people
-    users = User.objects[:5]
-
-    # All except for the first 5 people
-    users = User.objects[5:]
-
-    # 5 users, starting from the 10th user found
-    users = User.objects[10:15]
-
-Aggregation
------------
-MongoDB provides some aggregation methods out of the box, but there are not as
-many as you typically get with an RDBMS. MongoEngine provides a wrapper around
-the built-in methods and provides some of its own, which are implemented as
-Javascript code that is executed on the database server.
-
-Counting results
-^^^^^^^^^^^^^^^^
-Just as with limiting and skipping results, there is a method on
-:class:`~mongoengine.queryset.QuerySet` objects -- 
-:meth:`~mongoengine.queryset.QuerySet.count`, but there is also a more Pythonic
-way of achieving this::
-
-    num_users = len(User.objects)
-
-Further aggregation
-^^^^^^^^^^^^^^^^^^^
-You may sum over the values of a specific field on documents using
-:meth:`~mongoengine.queryset.QuerySet.sum`::
-
-    yearly_expense = Employee.objects.sum('salary')
-
-.. note::
-   If the field isn't present on a document, that document will be ignored from
-   the sum.
-
-To get the average (mean) of a field on a collection of documents, use
-:meth:`~mongoengine.queryset.QuerySet.average`::
-
-    mean_age = User.objects.average('age')
-
-As MongoDB provides native lists, MongoEngine provides a helper method to get a
-dictionary of the frequencies of items in lists across an entire collection --
-:meth:`~mongoengine.queryset.QuerySet.item_frequencies`. An example of its use
-would be generating "tag-clouds"::
-
-    class Article(Document):
-        tag = ListField(StringField())
-
-    # After adding some tagged articles...
-    tag_freqs = Article.objects.item_frequencies('tag', normalize=True)
-
-    from operator import itemgetter
-    top_tags = sorted(tag_freqs.items(), key=itemgetter(1), reverse=True)[:10]
-

mongoengine/__init__.py

@@ -1,24 +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 *
 
-__all__ = (document.__all__ + fields.__all__ + connection.__all__ +
+# Import everything from each submodule so that it can be accessed via
-           queryset.__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 *
 
-__author__ = 'Harry Marr'
 
-VERSION = (0, 1, 1)
+__all__ = (list(document.__all__) + list(fields.__all__) +
+           list(connection.__all__) + list(queryset.__all__) +
+           list(signals.__all__) + list(errors.__all__))
+
+
+VERSION = (0, 12, 0)
+
 
 def get_version():
-    version = '%s.%s' % (VERSION[0], VERSION[1])
+    """Return the VERSION as a string, e.g. for VERSION == (0, 10, 7),
-    if VERSION[2]:
+    return '0.10.7'.
-        version = '%s.%s' % (version, VERSION[2])
+    """
-    return version
+    return '.'.join(map(str, VERSION))
+
 
 __version__ = get_version()
-

mongoengine/base.py

@@ -1,271 +0,0 @@
-from queryset import QuerySetManager
-
-import pymongo
-
-
-class ValidationError(Exception):
-    pass
-
-
-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.
-    """
-    
-    def __init__(self, name=None, required=False, default=None):
-        self.name = name
-        self.required = required
-        self.default = default
-
-    def __get__(self, instance, owner):
-        """Descriptor for retrieving a value from a field in a document. Do 
-        any necessary conversion between Python and MongoDB types.
-        """
-        if instance is None:
-            # Document class being used rather than a document object
-            return self
-
-        # Get value from document instance if available, if not use default
-        value = instance._data.get(self.name)
-        if value is None:
-            value = self.default
-            # Allow callable default values
-            if callable(value):
-                value = value()
-        return value
-
-    def __set__(self, instance, value):
-        """Descriptor for assigning a value to a field in a document.
-        """
-        instance._data[self.name] = value
-
-    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 validate(self, value):
-        """Perform validation on a value.
-        """
-        pass
-
-
-class ObjectIdField(BaseField):
-    """An field wrapper around MongoDB's ObjectIds.
-    """
-    
-    def to_python(self, value):
-        return str(value)
-
-    def to_mongo(self, value):
-        if not isinstance(value, pymongo.objectid.ObjectId):
-            return pymongo.objectid.ObjectId(value)
-        return value
-
-    def validate(self, value):
-        try:
-            pymongo.objectid.ObjectId(str(value))
-        except:
-            raise ValidationError('Invalid Object ID')
-
-
-class DocumentMetaclass(type):
-    """Metaclass for all documents.
-    """
-
-    def __new__(cls, name, bases, attrs):
-        metaclass = attrs.get('__metaclass__')
-        super_new = super(DocumentMetaclass, cls).__new__
-        if metaclass and issubclass(metaclass, DocumentMetaclass):
-            return super_new(cls, name, bases, attrs)
-
-        doc_fields = {}
-        class_name = [name]
-        superclasses = {}
-        for base in bases:
-            # Include all fields present in superclasses
-            if hasattr(base, '_fields'):
-                doc_fields.update(base._fields)
-                class_name.append(base._class_name)
-                # Get superclasses from superclass
-                superclasses[base._class_name] = base
-                superclasses.update(base._superclasses)
-        attrs['_class_name'] = '.'.join(reversed(class_name))
-        attrs['_superclasses'] = superclasses
-
-        # Add the document's fields to the _fields attribute
-        for attr_name, attr_value in attrs.items():
-            if hasattr(attr_value, "__class__") and \
-                issubclass(attr_value.__class__, BaseField):
-                if not attr_value.name:
-                    attr_value.name = attr_name
-                doc_fields[attr_name] = attr_value
-        attrs['_fields'] = doc_fields
-
-        return super_new(cls, name, bases, attrs)
-
-
-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):
-        super_new = super(TopLevelDocumentMetaclass, cls).__new__
-        # Classes defined in this package are abstract and should not have 
-        # their own metadata with DB collection, etc.
-        # __metaclass__ is only set on the class with the __metaclass__ 
-        # attribute (i.e. it is not set on subclasses). This differentiates
-        # 'real' documents from the 'Document' class
-        if attrs.get('__metaclass__') == TopLevelDocumentMetaclass:
-            return super_new(cls, name, bases, attrs)
-
-        collection = name.lower()
-        
-        simple_class = True
-        # Subclassed documents inherit collection from superclass
-        for base in bases:
-            if hasattr(base, '_meta') and 'collection' in base._meta:
-                # Ensure that the Document class may be subclassed - 
-                # inheritance may be disabled to remove dependency on 
-                # additional fields _cls and _types
-                if base._meta.get('allow_inheritance', True) == False:
-                    raise ValueError('Document %s may not be subclassed' %
-                                     base.__name__)
-                else:
-                    simple_class = False
-                collection = base._meta['collection']
-
-        meta = {
-            'collection': collection,
-            'allow_inheritance': True,
-            'max_documents': None,
-            'max_size': None,
-        }
-        meta.update(attrs.get('meta', {}))
-        # Only simple classes - direct subclasses of Document - may set
-        # allow_inheritance to False
-        if not simple_class and not meta['allow_inheritance']:
-            raise ValueError('Only direct subclasses of Document may set '
-                             '"allow_inheritance" to False')
-        attrs['_meta'] = meta
-
-        attrs['id'] = ObjectIdField(name='_id')
-
-        # Set up collection manager, needs the class to have fields so use
-        # DocumentMetaclass before instantiating CollectionManager object
-        new_class = super_new(cls, name, bases, attrs)
-        new_class.objects = QuerySetManager()
-
-        return new_class
-
-
-class BaseDocument(object):
-
-    def __init__(self, **values):
-        self._data = {}
-        # Assign initial values to instance
-        for attr_name, attr_value in self._fields.items():
-            if attr_name in values:
-                setattr(self, attr_name, values.pop(attr_name))
-            else:
-                # Use default value if present
-                value = getattr(self, attr_name, None)
-                setattr(self, attr_name, value)
-
-    @classmethod
-    def _get_subclasses(cls):
-        """Return a dictionary of all subclasses (found recursively).
-        """
-        try:
-            subclasses = cls.__subclasses__()
-        except:
-            subclasses = cls.__subclasses__(cls)
-
-        all_subclasses = {}
-        for subclass in subclasses:
-            all_subclasses[subclass._class_name] = subclass
-            all_subclasses.update(subclass._get_subclasses())
-        return all_subclasses
-
-    def __iter__(self):
-        # Use _data rather than _fields as iterator only looks at names so
-        # values don't need to be converted to Python types
-        return iter(self._data)
-
-    def __getitem__(self, name):
-        """Dictionary-style field access, return a field's value if present.
-        """
-        try:
-            return getattr(self, name)
-        except AttributeError:
-            raise KeyError(name)
-
-    def __setitem__(self, name, value):
-        """Dictionary-style field access, set a field's value.
-        """
-        # Ensure that the field exists before settings its value
-        if name not in self._fields:
-            raise KeyError(name)
-        return setattr(self, name, value)
-
-    def __contains__(self, name):
-        try:
-            val = getattr(self, name)
-            return val is not None
-        except AttributeError:
-            return False
-
-    def __len__(self):
-        return len(self._data)
-
-    def to_mongo(self):
-        """Return data dictionary ready for use with MongoDB.
-        """
-        data = {}
-        for field_name, field in self._fields.items():
-            value = getattr(self, field_name, None)
-            if value is not None:
-                data[field.name] = field.to_mongo(value)
-        # Only add _cls and _types if allow_inheritance is not False
-        if not (hasattr(self, '_meta') and
-                self._meta.get('allow_inheritance', True) == False):
-            data['_cls'] = self._class_name
-            data['_types'] = self._superclasses.keys() + [self._class_name]
-        return data
-    
-    @classmethod
-    def _from_son(cls, son):
-        """Create an instance of a Document (subclass) from a PyMongo SOM.
-        """
-        # get the class name from the document, falling back to the given
-        # class if unavailable
-        class_name = son.get(u'_cls', cls._class_name)
-
-        data = dict((str(key), value) for key, value in son.items())
-
-        if '_types' in data:
-            del data['_types']
-
-        if '_cls' in data:
-            del data['_cls']
-
-        # Return correct subclass for document type
-        if class_name != cls._class_name:
-            subclasses = cls._get_subclasses()
-            if class_name not in subclasses:
-                # Type of document is probably more generic than the class
-                # that has been queried to return this SON
-                return None
-            cls = subclasses[class_name]
-
-        for field_name, field in cls._fields.items():
-            if field.name in data:
-                data[field_name] = field.to_python(data[field.name])
-
-        return cls(**data)

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',
+
+    # document
+    'BaseDocument',
+
+    # fields
+    'BaseField', 'ComplexBaseField', 'ObjectIdField', 'GeoJsonBaseField',
+
+    # metaclasses
+    'DocumentMetaclass', 'TopLevelDocumentMetaclass'
+)

mongoengine/base/common.py

@@ -0,0 +1,31 @@
+from mongoengine.errors import NotRegistered
+
+__all__ = ('UPDATE_OPERATORS', 'get_document', '_document_registry')
+
+
+UPDATE_OPERATORS = set(['set', 'unset', 'inc', 'dec', '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 +1,486 @@
+import itertools
+import weakref
+
+import six
+
+from mongoengine.common import _import_class
+from mongoengine.errors import DoesNotExist, MultipleObjectsReturned
+
+__all__ = ('BaseDict', 'BaseList', 'EmbeddedDocumentList')
+
+
+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 xrange(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 update values.
+
+        .. 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 SemiStrictDict(StrictDict):
+    __slots__ = ('_extras', )
+    _classes = {}
+
+    def __getattr__(self, attr):
+        try:
+            super(SemiStrictDict, self).__getattr__(attr)
+        except AttributeError:
+            try:
+                return self.__getattribute__('_extras')[attr]
+            except KeyError as e:
+                raise AttributeError(e)
+
+    def __setattr__(self, attr, value):
+        try:
+            super(SemiStrictDict, self).__setattr__(attr, value)
+        except AttributeError:
+            try:
+                self._extras[attr] = value
+            except AttributeError:
+                self._extras = {attr: value}
+
+    def __delattr__(self, attr):
+        try:
+            super(SemiStrictDict, self).__delattr__(attr)
+        except AttributeError:
+            try:
+                del self._extras[attr]
+            except KeyError as e:
+                raise AttributeError(e)
+
+    def __iter__(self):
+        try:
+            extras_iter = iter(self.__getattribute__('_extras'))
+        except AttributeError:
+            extras_iter = ()
+        return itertools.chain(super(SemiStrictDict, self).__iter__(), extras_iter)

mongoengine/base/fields.py

@@ -0,0 +1,632 @@
+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
+
+        # Validate the db_field
+        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
+        elif value not in 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

@@ -1,46 +1,262 @@
-from pymongo import Connection
+from pymongo import MongoClient, ReadPreference, uri_parser
+import six
+
+from mongoengine.python_support import IS_PYMONGO_3
+
+__all__ = ['MongoEngineConnectionError', 'connect', 'register_connection',
+           'DEFAULT_CONNECTION_NAME']
 
 
-__all__ = ['ConnectionError', 'connect']
+DEFAULT_CONNECTION_NAME = 'default'
+
+if IS_PYMONGO_3:
+    READ_PREFERENCE = ReadPreference.PRIMARY
+else:
+    from pymongo import MongoReplicaSetClient
+    READ_PREFERENCE = False
 
 
-_connection_settings = {
+class MongoEngineConnectionError(Exception):
-    'host': 'localhost',
+    """Error raised when the database connection can't be established or
-    'port': 27017,
+    when a connection with a requested alias can't be retrieved.
-    'pool_size': 1,
+    """
-}
-_connection = None
-_db = None
-
-
-class ConnectionError(Exception):
     pass
 
 
-def _get_connection():
+_connection_settings = {}
-    global _connection
+_connections = {}
-    if _connection is None:
+_dbs = {}
-        _connection = Connection(**_connection_settings)
-    return _connection
 
-def _get_db():
-    global _db
-    if _db is None:
-        raise ConnectionError('Not connected to database')
-    return _db
 
-def connect(db, username=None, password=None, **kwargs):
+def register_connection(alias, name=None, host=None, port=None,
-    """Connect to the database specified by the 'db' argument. Connection 
+                        read_preference=READ_PREFERENCE,
-    settings may be provided here as well if the database is not running on
+                        username=None, password=None,
-    the default port on localhost. If authentication is needed, provide
+                        authentication_source=None,
-    username and password arguments as well.
+                        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 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 read_preference: The read preference for the collection
+       ** Added pymongo 2.1
+    :param username: username to authenticate with
+    :param password: password to authenticate with
+    :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 _db
+    conn_settings = {
+        'name': name or 'test',
+        'host': host or 'localhost',
+        'port': port or 27017,
+        'read_preference': read_preference,
+        'username': username,
+        'password': password,
+        'authentication_source': authentication_source,
+        'authentication_mechanism': authentication_mechanism
+    }
 
-    _connection_settings.update(kwargs)
+    conn_host = conn_settings['host']
-    connection = _get_connection()
-    # Get DB from connection and auth if necessary
-    _db = connection[db]
-    if username is not None and password is not None:
-        _db.authenticate(username, password)
 
+    # Host can be a list or a string, so if string, force to a list.
+    if isinstance(conn_host, six.string_types):
+        conn_host = [conn_host]
+
+    resolved_hosts = []
+    for entity in conn_host:
+
+        # Handle Mongomock
+        if entity.startswith('mongomock://'):
+            conn_settings['is_mock'] = True
+            # `mongomock://` is not a valid url prefix and must be replaced by `mongodb://`
+            resolved_hosts.append(entity.replace('mongomock://', 'mongodb://', 1))
+
+        # 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):
+    """Close the connection with a given alias."""
+    if alias in _connections:
+        get_connection(alias=alias).close()
+        del _connections[alias]
+    if alias in _dbs:
+        del _dbs[alias]
+
+
+def get_connection(alias=DEFAULT_CONNECTION_NAME, reconnect=False):
+    """Return a connection with a given alias."""
+
+    # Connect to the database if not already connected
+    if reconnect:
+        disconnect(alias)
+
+    # 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:
+        if alias == DEFAULT_CONNECTION_NAME:
+            msg = 'You have not defined a default connection'
+        else:
+            msg = 'Connection with alias "%s" has not been defined' % alias
+        raise MongoEngineConnectionError(msg)
+
+    def _clean_settings(settings_dict):
+        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
+        }
+
+    # 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)
+
+            # 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 as e:
+            raise MongoEngineConnectionError(
+                'Cannot connect to database %s :\n%s' % (alias, e))
+
+    return _connections[alias]
+
+
+def get_db(alias=DEFAULT_CONNECTION_NAME, reconnect=False):
+    if reconnect:
+        disconnect(alias)
+
+    if alias not in _dbs:
+        conn = get_connection(alias)
+        conn_settings = _connection_settings[alias]
+        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'] or
+                                          conn_settings['authentication_mechanism'] == 'MONGODB-X509'):
+            db.authenticate(conn_settings['username'], conn_settings['password'], **auth_kwargs)
+        _dbs[alias] = db
+    return _dbs[alias]
+
+
+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
+    running on the default port on localhost. If authentication is needed,
+    provide username and password arguments as well.
+
+    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.
+    """
+    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 +1,217 @@
+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')
+
+
+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

mongoengine/dereference.py

@@ -0,0 +1,246 @@
+from collections import OrderedDict
+from bson import DBRef, SON
+import six
+
+from mongoengine.base import (BaseDict, BaseList, EmbeddedDocumentList,
+                              TopLevelDocumentMetaclass, get_document)
+from mongoengine.connection import get_db
+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 conversion of complex data types.
+
+        :param items: The iterable (dict, list, queryset) to be dereferenced.
+        :param max_depth: The maximum depth to recurse to
+        :param instance: The owning instance used for tracking changes by
+            :class:`~mongoengine.base.ComplexBaseField`
+        :param name: The name of the field, used for tracking changes by
+            :class:`~mongoengine.base.ComplexBaseField`
+        :param get: A boolean determining if being called by __get__
+        """
+        if items is None or isinstance(items, six.string_types):
+            return items
+
+        # cheapest way to convert a queryset to a list
+        # list(queryset) uses a count() query to determine length
+        if isinstance(items, QuerySet):
+            items = [i for i in items]
+
+        self.max_depth = max_depth
+        doc_type = None
+
+        if instance and isinstance(instance, (Document, EmbeddedDocument,
+                                              TopLevelDocumentMetaclass)):
+            doc_type = instance._fields.get(name)
+            while hasattr(doc_type, 'field'):
+                doc_type = doc_type.field
+
+            if isinstance(doc_type, ReferenceField):
+                field = doc_type
+                doc_type = doc_type.document_type
+                is_list = not hasattr(items, 'items')
+
+                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 for i in items.values()]):
+                    return items
+                elif not field.dbref:
+                    if not hasattr(items, 'items'):
+
+                        def _get_items(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:
+                                    new_items.append(v)
+                            return new_items
+
+                        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)
+        return self._attach_objects(items, 0, instance, name)
+
+    def _find_references(self, items, depth=0):
+        """
+        Recursively finds all db references to be dereferenced
+
+        :param items: The iterable (dict, list, queryset)
+        :param depth: The current depth of recursion
+        """
+        reference_map = {}
+        if not items or depth >= self.max_depth:
+            return reference_map
+
+        # Determine the iterator to use
+        if isinstance(items, dict):
+            iterator = items.values()
+        else:
+            iterator = items
+
+        # Recursively find dbreferences
+        depth += 1
+        for item in iterator:
+            if isinstance(item, (Document, EmbeddedDocument)):
+                for field_name, field in item._fields.iteritems():
+                    v = item._data.get(field_name, None)
+                    if 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']), 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, set()).update(refs)
+            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']), 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, set()).update(refs)
+
+        return reference_map
+
+    def _fetch_objects(self, doc_type=None):
+        """Fetch all references and convert to their document objects
+        """
+        object_map = {}
+        for collection, dbrefs in self.reference_map.iteritems():
+            if hasattr(collection, 'objects'):  # We have a document class for the refs
+                col_name = collection._get_collection_name()
+                refs = [dbref for dbref in dbrefs
+                        if (col_name, dbref) not in object_map]
+                references = collection.objects.in_bulk(refs)
+                for key, doc in references.iteritems():
+                    object_map[(col_name, key)] = doc
+            else:  # Generic reference: use the refs data to convert to document
+                if isinstance(doc_type, (ListField, DictField, MapField,)):
+                    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': {'$in': refs}})
+                    for ref in references:
+                        doc = doc_type._from_son(ref)
+                        object_map[(collection, doc.id)] = doc
+                else:
+                    references = get_db()[collection].find({'_id': {'$in': refs}})
+                    for ref in references:
+                        if '_cls' in ref:
+                            doc = get_document(ref['_cls'])._from_son(ref)
+                        elif doc_type is None:
+                            doc = get_document(
+                                ''.join(x.capitalize()
+                                        for x in collection.split('_')))._from_son(ref)
+                        else:
+                            doc = doc_type._from_son(ref)
+                        object_map[(collection, doc.id)] = doc
+        return object_map
+
+    def _attach_objects(self, items, depth=0, instance=None, name=None):
+        """
+        Recursively finds all db references to be dereferenced
+
+        :param items: The iterable (dict, list, queryset)
+        :param depth: The current depth of recursion
+        :param instance: The owning instance used for tracking changes by
+            :class:`~mongoengine.base.ComplexBaseField`
+        :param name: The name of the field, used for tracking changes by
+            :class:`~mongoengine.base.ComplexBaseField`
+        """
+        if not items:
+            if isinstance(items, (BaseDict, BaseList)):
+                return items
+
+            if instance:
+                if isinstance(items, dict):
+                    return BaseDict(items, instance, name)
+                else:
+                    return BaseList(items, instance, name)
+
+        if isinstance(items, (dict, SON)):
+            if '_ref' in items:
+                return self.object_map.get(
+                    (items['_ref'].collection, items['_ref'].id), items)
+            elif '_cls' in items:
+                doc = get_document(items['_cls'])._from_son(items)
+                _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 = []
+        elif isinstance(items, OrderedDict):
+            is_list = False
+            iterator = items.iteritems()
+            data = OrderedDict()
+        else:
+            is_list = False
+            iterator = items.iteritems()
+            data = {}
+
+        depth += 1
+        for k, v in iterator:
+            if is_list:
+                data.append(v)
+            else:
+                data[k] = v
+
+            if k in self.object_map and not is_list:
+                data[k] = self.object_map[k]
+            elif isinstance(v, (Document, EmbeddedDocument)):
+                for field_name in v._fields:
+                    v = data[k]._data.get(field_name, None)
+                    if isinstance(v, DBRef):
+                        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'].collection, v['_ref'].id), v)
+                    elif isinstance(v, (dict, list, tuple)) and depth <= self.max_depth:
+                        item_name = six.text_type('{0}.{1}.{2}').format(name, k, field_name)
+                        data[k]._data[field_name] = self._attach_objects(v, depth, instance=instance, name=item_name)
+            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 hasattr(v, 'id'):
+                data[k] = self.object_map.get((v.collection, v.id), v)
+
+        if instance and name:
+            if is_list:
+                return tuple(data) if as_tuple else list_type(data, instance, name)
+            return BaseDict(data, instance, name)
+        depth += 1
+        return data

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

@@ -0,0 +1,25 @@
+"""
+Helper functions, constants, and types to aid with Python v2.7 - v3.x and
+PyMongo v2.7 - v3.x support.
+"""
+import pymongo
+import six
+
+
+if pymongo.version_tuple[0] < 3:
+    IS_PYMONGO_3 = False
+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:
+        import cStringIO
+    except ImportError:
+        pass
+    else:
+        StringIO = cStringIO.StringIO

mongoengine/queryset.py

@@ -1,343 +0,0 @@
-from connection import _get_db
-
-import pymongo
-
-
-__all__ = ['queryset_manager', 'InvalidQueryError', 'InvalidCollectionError']
-
-
-class InvalidQueryError(Exception):
-    pass
-
-
-class QuerySet(object):
-    """A set of results returned from a query. Wraps a MongoDB cursor, 
-    providing :class:`~mongoengine.Document` objects as the results.
-    """
-    
-    def __init__(self, document, collection):
-        self._document = document
-        self._collection = collection
-        self._query = {}
-        # If inheritance is allowed, only return instances and instances of
-        # subclasses of the class being used
-        if document._meta.get('allow_inheritance'):
-            self._query = {'_types': self._document._class_name}
-        self._cursor_obj = None
-        
-    def ensure_index(self, key_or_list, direction=None):
-        """Ensure that the given indexes are in place.
-        """
-        if isinstance(key_or_list, basestring):
-            # single-field indexes needn't specify a direction
-            if key_or_list.startswith("-"):
-                key_or_list = key_or_list[1:]
-            self._collection.ensure_index(key_or_list)
-        elif isinstance(key_or_list, (list, tuple)):
-            print key_or_list
-            self._collection.ensure_index(key_or_list)
-        return self
-
-    def __call__(self, **query):
-        """Filter the selected documents by calling the 
-        :class:`~mongoengine.QuerySet` with a query.
-        """
-        query = QuerySet._transform_query(_doc_cls=self._document, **query)
-        self._query.update(query)
-        return self
-
-    @property
-    def _cursor(self):
-        if not self._cursor_obj:
-            self._cursor_obj = self._collection.find(self._query)
-        return self._cursor_obj
-
-    @classmethod
-    def _translate_field_name(cls, document, parts):
-        """Translate a field attribute name to a database field name.
-        """
-        if not isinstance(parts, (list, tuple)):
-            parts = [parts]
-        field_names = []
-        field = None
-        for field_name in parts:
-            if field is None:
-                # Look up first field from the document
-                field = document._fields[field_name]
-            else:
-                # Look up subfield on the previous field
-                field = field.lookup_member(field_name)
-                if field is None:
-                    raise InvalidQueryError('Cannot resolve field "%s"'
-                                            % field_name)
-            field_names.append(field.name)
-        return field_names
-       
-    @classmethod
-    def _transform_query(cls, _doc_cls=None, **query):
-        """Transform a query from Django-style format to Mongo format.
-        """
-        operators = ['neq', 'gt', 'gte', 'lt', 'lte', 'in', 'nin', 'mod',
-                     'all', 'size', 'exists']
-
-        mongo_query = {}
-        for key, value in query.items():
-            parts = key.split('__')
-            # Check for an operator and transform to mongo-style if there is
-            op = None
-            if parts[-1] in operators:
-                op = parts.pop()
-                value = {'$' + op: value}
-
-            # Switch field names to proper names [set in Field(name='foo')]
-            if _doc_cls:
-                parts = QuerySet._translate_field_name(_doc_cls, parts)
-
-            key = '.'.join(parts)
-            if op is None or key not in mongo_query:
-                mongo_query[key] = value
-            elif key in mongo_query and isinstance(mongo_query[key], dict):
-                mongo_query[key].update(value)
-
-        return mongo_query
-
-    def first(self):
-        """Retrieve the first object matching the query.
-        """
-        try:
-            result = self[0]
-        except IndexError:
-            result = None
-        return result
-
-    def with_id(self, object_id):
-        """Retrieve the object matching the id provided.
-        """
-        if not isinstance(object_id, pymongo.objectid.ObjectId):
-            object_id = pymongo.objectid.ObjectId(object_id)
-
-        result = self._collection.find_one(object_id)
-        if result is not None:
-            result = self._document._from_son(result)
-        return result
-
-    def next(self):
-        """Wrap the result in a :class:`~mongoengine.Document` object.
-        """
-        return self._document._from_son(self._cursor.next())
-
-    def count(self):
-        """Count the selected elements in the query.
-        """
-        return self._cursor.count()
-
-    def __len__(self):
-        return self.count()
-
-    def limit(self, n):
-        """Limit the number of returned documents to `n`. This may also be
-        achieved using array-slicing syntax (e.g. ``User.objects[:5]``).
-        """
-        self._cursor.limit(n)
-        # Return self to allow chaining
-        return self
-
-    def skip(self, n):
-        """Skip `n` documents before returning the results. This may also be
-        achieved using array-slicing syntax (e.g. ``User.objects[5:]``).
-        """
-        self._cursor.skip(n)
-        return self
-
-    def __getitem__(self, key):
-        """Support skip and limit using getitem and slicing syntax.
-        """
-        # Slice provided
-        if isinstance(key, slice):
-            self._cursor_obj = self._cursor[key]
-            # Allow further QuerySet modifications to be performed
-            return self
-        # Integer index provided
-        elif isinstance(key, int):
-            return self._document._from_son(self._cursor[key])
-
-    def order_by(self, *keys):
-        """Order the :class:`~mongoengine.queryset.QuerySet` by the keys. The
-        order may be specified by prepending each of the keys by a + or a -.
-        Ascending order is assumed.
-        """
-        key_list = []
-        for key in keys:
-            direction = pymongo.ASCENDING
-            if key[0] == '-':
-                direction = pymongo.DESCENDING
-            if key[0] in ('-', '+'):
-                key = key[1:]
-            key_list.append((key, direction)) 
-
-        self._cursor.sort(key_list)
-        return self
-        
-    def explain(self, format=False):
-        """Return an explain plan record for the 
-        :class:`~mongoengine.queryset.QuerySet`\ 's cursor.
-        """
-        plan = self._cursor.explain()
-        if format:
-            import pprint
-            plan = pprint.pformat(plan)
-        return plan
-        
-    def delete(self):
-        """Delete the documents matched by the query.
-        """
-        self._collection.remove(self._query)
-
-    def __iter__(self):
-        return self
-
-    def exec_js(self, code, *fields, **options):
-        """Execute a Javascript function on the server. A list of fields may be
-        provided, which will be translated to their correct names and supplied
-        as the arguments to the function. A few extra variables are added to
-        the function's scope: ``collection``, which is the name of the 
-        collection in use; ``query``, which is an object representing the 
-        current query; and ``options``, which is an object containing any
-        options specified as keyword arguments.
-        """
-        fields = [QuerySet._translate_field_name(self._document, f)
-                  for f in fields]
-        collection = self._document._meta['collection']
-        scope = {
-            'collection': collection,
-            'query': self._query,
-            'options': options or {},
-        }
-        code = pymongo.code.Code(code, scope=scope)
-
-        db = _get_db()
-        return db.eval(code, *fields)
-
-    def sum(self, field):
-        """Sum over the values of the specified field.
-        """
-        sum_func = """
-            function(sumField) {
-                var total = 0.0;
-                db[collection].find(query).forEach(function(doc) {
-                    total += (doc[sumField] || 0.0);
-                });
-                return total;
-            }
-        """
-        return self.exec_js(sum_func, field)
-
-    def average(self, field):
-        """Average over the values of the specified field.
-        """
-        average_func = """
-            function(averageField) {
-                var total = 0.0;
-                var num = 0;
-                db[collection].find(query).forEach(function(doc) {
-                    if (doc[averageField]) {
-                        total += doc[averageField];
-                        num += 1;
-                    }
-                });
-                return total / num;
-            }
-        """
-        return self.exec_js(average_func, field)
-
-    def item_frequencies(self, list_field, normalize=False):
-        """Returns a dictionary of all items present in a list field across
-        the whole queried set of documents, and their corresponding frequency.
-        This is useful for generating tag clouds, or searching documents. 
-        """
-        freq_func = """
-            function(listField) {
-                if (options.normalize) {
-                    var total = 0.0;
-                    db[collection].find(query).forEach(function(doc) {
-                        total += doc[listField].length;
-                    });
-                }
-
-                var frequencies = {};
-                var inc = 1.0;
-                if (options.normalize) {
-                    inc /= total;
-                }
-                db[collection].find(query).forEach(function(doc) {
-                    doc[listField].forEach(function(item) {
-                        frequencies[item] = inc + (frequencies[item] || 0);
-                    });
-                });
-                return frequencies;
-            }
-        """
-        return self.exec_js(freq_func, list_field, normalize=normalize)
-
-
-class InvalidCollectionError(Exception):
-    pass
-
-
-class QuerySetManager(object):
-
-    def __init__(self, manager_func=None):
-        self._manager_func = manager_func
-        self._collection = None
-
-    def __get__(self, instance, owner):
-        """Descriptor for instantiating a new QuerySet object when 
-        Document.objects is accessed.
-        """
-        if instance is not None:
-            # Document class being used rather than a document object
-            return self
-
-        if self._collection is None:
-            db = _get_db()
-            collection = owner._meta['collection']
-
-            # Create collection as a capped collection if specified
-            if owner._meta['max_size'] or owner._meta['max_documents']:
-                # Get max document limit and max byte size from meta
-                max_size = owner._meta['max_size'] or 10000000 # 10MB default
-                max_documents = owner._meta['max_documents']
-
-                if collection in db.collection_names():
-                    self._collection = db[collection]
-                    # The collection already exists, check if its capped 
-                    # options match the specified capped options
-                    options = self._collection.options()
-                    if options.get('max') != max_documents or \
-                       options.get('size') != max_size:
-                        msg = ('Cannot create collection "%s" as a capped '
-                               'collection as it already exists') % collection
-                        raise InvalidCollectionError(msg)
-                else:
-                    # Create the collection as a capped collection
-                    opts = {'capped': True, 'size': max_size}
-                    if max_documents:
-                        opts['max'] = max_documents
-                    self._collection = db.create_collection(collection, opts)
-            else:
-                self._collection = db[collection]
-        
-        # owner is the document that contains the QuerySetManager
-        queryset = QuerySet(owner, self._collection)
-        if self._manager_func:
-            queryset = self._manager_func(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.queryset.QuerySet` as its only argument, and
-    returns a :class:`~mongoengine.queryset.QuerySet`, probably the same one 
-    but modified in some way.
-    """
-    return QuerySetManager(func)

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 +1,193 @@
+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:
+                raise StopIteration
+
+            # 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 xrange(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 xrange(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 +1,427 @@
+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. 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]).")
+                elif not hasattr(value, '__iter__'):
+                    raise TypeError("The `in`, `nin`, `all`, or "
+                                    "`near`-operators must be applied to an "
+                                    "iterable (e.g. a list).")
+                else:
+                    value = [field.prepare_query_value(op, v) for v in 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 = '$'
+                    parts.append(field)
+                    append_field = False
+                else:
+                    parts.append(field.db_field)
+                if append_field:
+                    appended_sub_field = False
+                    cleaned_fields.append(field)
+                    if hasattr(field, 'field'):
+                        cleaned_fields.append(field.field)
+                        appended_sub_field = True
+
+            # Convert value to proper value
+            if appended_sub_field:
+                field = cleaned_fields[-2]
+            else:
+                field = cleaned_fields[-1]
+
+            GeoJsonBaseField = _import_class('GeoJsonBaseField')
+            if isinstance(field, GeoJsonBaseField):
+                value = field.to_mongo(value)
+
+            if op in (None, 'set', 'push', 'pull'):
+                if field.required or value is not None:
+                    value = field.prepare_query_value(op, value)
+            elif op in ('pushAll', 'pullAll'):
+                value = [field.prepare_query_value(op, v) for v in value]
+            elif op in ('addToSet', 'setOnInsert'):
+                if isinstance(value, (list, tuple, set)):
+                    value = [field.prepare_query_value(op, v) for v in value]
+                elif field.required or value is not None:
+                    value = field.prepare_query_value(op, value)
+            elif op == 'unset':
+                value = 1
+
+        if match:
+            match = '$' + 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')
+            if ListField in field_classes:
+                # Join all fields via dot notation to the last ListField
+                # Then process as normal
+                last_listField = len(
+                    cleaned_fields) - field_classes.index(ListField)
+                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: {'$each': value}}
+        else:
+            value = {key: value}
+        key = '$' + 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)')

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

@@ -0,0 +1,48 @@
+__all__ = ('pre_init', 'post_init', 'pre_save', 'pre_save_post_validation',
+           'post_save', 'pre_delete', 'post_delete')
+
+signals_available = False
+try:
+    from blinker import Namespace
+
+    signals_available = True
+except ImportError:
+    class Namespace(object):
+        def signal(self, name, doc=None):
+            return _FakeSignal(name, doc)
+
+    class _FakeSignal(object):
+        """If blinker is unavailable, create a fake class with the same
+        interface that allows sending of signals but will fail with an
+        error on anything else.  Instead of doing anything on send, it
+        will just ignore the arguments and do nothing instead.
+        """
+
+        def __init__(self, name, doc=None):
+            self.name = name
+            self.__doc__ = doc
+
+        def _fail(self, *args, **kwargs):
+            raise RuntimeError('signalling support is unavailable '
+                               'because the blinker library is '
+                               'not installed.')
+
+        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()
+
+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')
+pre_bulk_insert = _signals.signal('pre_bulk_insert')
+post_bulk_insert = _signals.signal('post_bulk_insert')

python-mongoengine.spec

@@ -0,0 +1,54 @@
+# sitelib for noarch packages, sitearch for others (remove the unneeded one)
+%{!?python_sitelib: %global python_sitelib %(%{__python} -c "from distutils.sysconfig import get_python_lib; print(get_python_lib())")}
+%{!?python_sitearch: %global python_sitearch %(%{__python} -c "from distutils.sysconfig import get_python_lib; print(get_python_lib(1))")}
+
+%define srcname mongoengine
+
+Name:           python-%{srcname}
+Version:        0.8.7
+Release:        1%{?dist}
+Summary:        A Python Document-Object Mapper for working with MongoDB
+
+Group:          Development/Libraries
+License:        MIT
+URL:            https://github.com/MongoEngine/mongoengine
+Source0:        %{srcname}-%{version}.tar.bz2
+
+BuildRequires:  python-devel
+BuildRequires:  python-setuptools
+
+Requires:       mongodb
+Requires:       pymongo
+Requires:       python-blinker
+Requires:       python-imaging
+
+
+%description
+MongoEngine is an ORM-like layer on top of PyMongo.
+
+%prep
+%setup -q -n %{srcname}-%{version}
+
+
+%build
+# Remove CFLAGS=... for noarch packages (unneeded)
+CFLAGS="$RPM_OPT_FLAGS" %{__python} setup.py build
+
+
+%install
+rm -rf $RPM_BUILD_ROOT
+%{__python} setup.py install -O1 --skip-build --root $RPM_BUILD_ROOT
+
+%clean
+rm -rf $RPM_BUILD_ROOT
+
+%files
+%defattr(-,root,root,-)
+%doc docs AUTHORS LICENSE README.rst
+# For noarch packages: sitelib
+ %{python_sitelib}/*
+# For arch-specific packages: sitearch
+# %{python_sitearch}/*
+
+%changelog
+* See: http://docs.mongoengine.org/en/latest/changelog.html

requirements.txt

@@ -0,0 +1,5 @@
+nose
+pymongo>=2.7.1
+six==1.10.0
+flake8
+flake8-import-order

setup.cfg

@@ -0,0 +1,11 @@
+[nosetests]
+verbosity=2
+detailed-errors=1
+tests=tests
+cover-package=mongoengine
+
+[flake8]
+ignore=E501,F401,F403,F405,I201
+exclude=build,dist,docs,venv,venv3,.tox,.eggs,tests
+max-complexity=47
+application-import-names=mongoengine,tests

setup.py

@@ -1,36 +1,87 @@
-from setuptools import setup
+import os
+import sys
+from setuptools import find_packages, setup
 
-VERSION = '0.1.1'
+# Hack to silence atexit traceback in newer python versions
-
-DESCRIPTION = "A Python Document-Object Mapper for working with MongoDB"
-
-LONG_DESCRIPTION = None
 try:
-    LONG_DESCRIPTION = open('README.rst').read()
+    import multiprocessing
-except:
+except ImportError:
     pass
 
+DESCRIPTION = (
+    'MongoEngine is a Python Object-Document '
+    'Mapper for working with MongoDB.'
+)
+
+try:
+    with open('README.rst') as fin:
+        LONG_DESCRIPTION = fin.read()
+except Exception:
+    LONG_DESCRIPTION = None
+
+
+def get_version(version_tuple):
+    """Return the version tuple as a string, e.g. for (0, 10, 7),
+    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
+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]))
+
 CLASSIFIERS = [
     'Development Status :: 4 - Beta',
     'Intended Audience :: Developers',
     'License :: OSI Approved :: MIT License',
     'Operating System :: OS Independent',
     'Programming Language :: Python',
+    "Programming Language :: Python :: 2",
+    "Programming Language :: Python :: 2.7",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.3",
+    "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',
 ]
 
-setup(name='mongoengine',
+extra_opts = {
-      version=VERSION,
+    'packages': find_packages(exclude=['tests', 'tests.*']),
-      packages=['mongoengine'],
+    'tests_require': ['nose', 'coverage==4.2', 'blinker', 'Pillow>=2.0.0']
-      author='Harry Marr',
+}
-      author_email='harry.marr@{nospam}gmail.com',
+if sys.version_info[0] == 3:
-      url='http://hmarr.com/mongoengine/',
+    extra_opts['use_2to3'] = True
-      license='MIT',
+    if 'test' in sys.argv or 'nosetests' in sys.argv:
-      description=DESCRIPTION,
+        extra_opts['packages'] = find_packages()
-      long_description=LONG_DESCRIPTION,
+        extra_opts['package_data'] = {
-      platforms=['any'],
+            'tests': ['fields/mongoengine.png', 'fields/mongodb_leaf.png']}
-      classifiers=CLASSIFIERS,
+else:
-      install_requires=['pymongo'],
+    extra_opts['tests_require'] += ['python-dateutil']
-      test_suite='tests',
+
+setup(
+    name='mongoengine',
+    version=VERSION,
+    author='Harry Marr',
+    author_email='harry.marr@{nospam}gmail.com',
+    maintainer="Ross Lawley",
+    maintainer_email="ross.lawley@{nospam}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>=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.py

@@ -1,385 +0,0 @@
-import unittest
-import datetime
-import pymongo
-
-from mongoengine import *
-from mongoengine.connection import _get_db
-
-
-class DocumentTest(unittest.TestCase):
-    
-    def setUp(self):
-        connect(db='mongoenginetest')
-        self.db = _get_db()
-
-        class Person(Document):
-            name = StringField()
-            age = IntField()
-        self.Person = Person
-
-    def test_drop_collection(self):
-        """Ensure that the collection may be dropped from the database.
-        """
-        self.Person(name='Test').save()
-
-        collection = self.Person._meta['collection']
-        self.assertTrue(collection in self.db.collection_names())
-
-        self.Person.drop_collection()
-        self.assertFalse(collection in self.db.collection_names())
-
-    def test_definition(self):
-        """Ensure that document may be defined using fields.
-        """
-        name_field = StringField()
-        age_field = IntField()
-
-        class Person(Document):
-            name = name_field
-            age = age_field
-            non_field = True
-        
-        self.assertEqual(Person._fields['name'], name_field)
-        self.assertEqual(Person._fields['age'], age_field)
-        self.assertFalse('non_field' in Person._fields)
-        self.assertTrue('id' in Person._fields)
-        # Test iteration over fields
-        fields = list(Person())
-        self.assertTrue('name' in fields and 'age' in fields)
-        # Ensure Document isn't treated like an actual document
-        self.assertFalse(hasattr(Document, '_fields'))
-
-    def test_get_superclasses(self):
-        """Ensure that the correct list of superclasses is assembled.
-        """
-        class Animal(Document): pass
-        class Fish(Animal): pass
-        class Mammal(Animal): pass
-        class Human(Mammal): pass
-        class Dog(Mammal): pass
-
-        mammal_superclasses = {'Animal': Animal}
-        self.assertEqual(Mammal._superclasses, mammal_superclasses)
-        
-        dog_superclasses = {
-            'Animal': Animal,
-            'Animal.Mammal': Mammal,
-        }
-        self.assertEqual(Dog._superclasses, dog_superclasses)
-
-    def test_get_subclasses(self):
-        """Ensure that the correct list of subclasses is retrieved by the 
-        _get_subclasses method.
-        """
-        class Animal(Document): pass
-        class Fish(Animal): pass
-        class Mammal(Animal): pass
-        class Human(Mammal): pass
-        class Dog(Mammal): pass
-
-        mammal_subclasses = {
-            'Animal.Mammal.Dog': Dog, 
-            'Animal.Mammal.Human': Human
-        }
-        self.assertEqual(Mammal._get_subclasses(), mammal_subclasses)
-        
-        animal_subclasses = {
-            'Animal.Fish': Fish,
-            'Animal.Mammal': Mammal,
-            'Animal.Mammal.Dog': Dog, 
-            'Animal.Mammal.Human': Human
-        }
-        self.assertEqual(Animal._get_subclasses(), animal_subclasses)
-
-    def test_polymorphic_queries(self):
-        """Ensure that the correct subclasses are returned from a query"""
-        class Animal(Document): pass
-        class Fish(Animal): pass
-        class Mammal(Animal): pass
-        class Human(Mammal): pass
-        class Dog(Mammal): pass
-
-        Animal().save()
-        Fish().save()
-        Mammal().save()
-        Human().save()
-        Dog().save()
-
-        classes = [obj.__class__ for obj in Animal.objects]
-        self.assertEqual(classes, [Animal, Fish, Mammal, Human, Dog])
-
-        classes = [obj.__class__ for obj in Mammal.objects]
-        self.assertEqual(classes, [Mammal, Human, Dog])
-
-        classes = [obj.__class__ for obj in Human.objects]
-        self.assertEqual(classes, [Human])
-
-        Animal.drop_collection()
-
-    def test_inheritance(self):
-        """Ensure that document may inherit fields from a superclass document.
-        """
-        class Employee(self.Person):
-            salary = IntField()
-
-        self.assertTrue('name' in Employee._fields)
-        self.assertTrue('salary' in Employee._fields)
-        self.assertEqual(Employee._meta['collection'], 
-                         self.Person._meta['collection'])
-
-    def test_allow_inheritance(self):
-        """Ensure that inheritance may be disabled on simple classes and that
-        _cls and _types will not be used.
-        """
-        class Animal(Document):
-            meta = {'allow_inheritance': False}
-            name = StringField()
-
-        Animal.drop_collection()
-
-        def create_dog_class():
-            class Dog(Animal):
-                pass
-        self.assertRaises(ValueError, create_dog_class)
-        
-        # Check that _cls etc aren't present on simple documents
-        dog = Animal(name='dog')
-        dog.save()
-        collection = self.db[Animal._meta['collection']]
-        obj = collection.find_one()
-        self.assertFalse('_cls' in obj)
-        self.assertFalse('_types' in obj)
-
-        Animal.drop_collection()
-
-        def create_employee_class():
-            class Employee(self.Person):
-                meta = {'allow_inheritance': False}
-        self.assertRaises(ValueError, create_employee_class)
-
-    def test_collection_name(self):
-        """Ensure that a collection with a specified name may be used.
-        """
-        collection = 'personCollTest'
-        if collection in self.db.collection_names():
-            self.db.drop_collection(collection)
-
-        class Person(Document):
-            name = StringField()
-            meta = {'collection': collection}
-        
-        user = Person(name="Test User")
-        user.save()
-        self.assertTrue(collection in self.db.collection_names())
-
-        user_obj = self.db[collection].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 in self.db.collection_names())
-
-    def test_capped_collection(self):
-        """Ensure that capped collections work properly.
-        """
-        class Log(Document):
-            date = DateTimeField(default=datetime.datetime.now)
-            meta = {
-                'max_documents': 10,
-                'max_size': 90000,
-            }
-
-        Log.drop_collection()
-
-        # Ensure that the collection handles up to its maximum
-        for i in range(10):
-            Log().save()
-
-        self.assertEqual(len(Log.objects), 10)
-
-        # Check that extra documents don't increase the size
-        Log().save()
-        self.assertEqual(len(Log.objects), 10)
-
-        options = Log.objects._collection.options()
-        self.assertEqual(options['capped'], True)
-        self.assertEqual(options['max'], 10)
-        self.assertEqual(options['size'], 90000)
-
-        # Check that the document cannot be redefined with different options
-        def recreate_log_document():
-            class Log(Document):
-                date = DateTimeField(default=datetime.datetime.now)
-                meta = {
-                    'max_documents': 11,
-                }
-            # Create the collection by accessing Document.objects
-            Log.objects
-        self.assertRaises(InvalidCollectionError, recreate_log_document)
-
-        Log.drop_collection()
-
-    def test_creation(self):
-        """Ensure that document may be created using keyword arguments.
-        """
-        person = self.Person(name="Test User", age=30)
-        self.assertEqual(person.name, "Test User")
-        self.assertEqual(person.age, 30)
-
-    def test_dictionary_access(self):
-        """Ensure that dictionary-style field access works properly.
-        """
-        person = self.Person(name='Test User', age=30)
-        self.assertEquals(person['name'], 'Test User')
-
-        self.assertRaises(KeyError, person.__getitem__, 'salary')
-        self.assertRaises(KeyError, person.__setitem__, 'salary', 50)
-
-        person['name'] = 'Another User'
-        self.assertEquals(person['name'], 'Another User')
-
-        # Length = length(assigned fields + id)
-        self.assertEquals(len(person), 3)
-
-        self.assertTrue('age' in person)
-        person.age = None
-        self.assertFalse('age' in person)
-        self.assertFalse('nationality' in person)
-
-    def test_embedded_document(self):
-        """Ensure that embedded documents are set up correctly.
-        """
-        class Comment(EmbeddedDocument):
-            content = StringField()
-        
-        self.assertTrue('content' in Comment._fields)
-        self.assertFalse('id' in Comment._fields)
-        self.assertFalse(hasattr(Comment, '_meta'))
-
-    def test_save(self):
-        """Ensure that a document may be saved in the database.
-        """
-        # Create person object and save it to the database
-        person = self.Person(name='Test User', age=30)
-        person.save()
-        # Ensure that the object is in the database
-        collection = self.db[self.Person._meta['collection']]
-        person_obj = collection.find_one({'name': 'Test User'})
-        self.assertEqual(person_obj['name'], 'Test User')
-        self.assertEqual(person_obj['age'], 30)
-        self.assertEqual(str(person_obj['_id']), person.id)
-
-    def test_delete(self):
-        """Ensure that document may be deleted using the delete method.
-        """
-        person = self.Person(name="Test User", age=30)
-        person.save()
-        self.assertEqual(len(self.Person.objects), 1)
-        person.delete()
-        self.assertEqual(len(self.Person.objects), 0)
-
-    def test_save_custom_id(self):
-        """Ensure that a document may be saved with a custom _id.
-        """
-        # Create person object and save it to the database
-        person = self.Person(name='Test User', age=30, 
-                             id='497ce96f395f2f052a494fd4')
-        person.save()
-        # Ensure that the object is in the database with the correct _id
-        collection = self.db[self.Person._meta['collection']]
-        person_obj = collection.find_one({'name': 'Test User'})
-        self.assertEqual(str(person_obj['_id']), '497ce96f395f2f052a494fd4')
-
-    def test_save_list(self):
-        """Ensure that a list field may be properly saved.
-        """
-        class Comment(EmbeddedDocument):
-            content = StringField()
-
-        class BlogPost(Document):
-            content = StringField()
-            comments = ListField(EmbeddedDocumentField(Comment))
-            tags = ListField(StringField())
-
-        post = BlogPost(content='Went for a walk today...')
-        post.tags = tags = ['fun', 'leisure']
-        comments = [Comment(content='Good for you'), Comment(content='Yay.')]
-        post.comments = comments
-        post.save()
-
-        collection = self.db[BlogPost._meta['collection']]
-        post_obj = collection.find_one()
-        self.assertEqual(post_obj['tags'], tags)
-        for comment_obj, comment in zip(post_obj['comments'], comments):
-            self.assertEqual(comment_obj['content'], comment['content'])
-
-        BlogPost.drop_collection()
-
-    def test_save_embedded_document(self):
-        """Ensure that a document with an embedded document field may be 
-        saved in the database.
-        """
-        class EmployeeDetails(EmbeddedDocument):
-            position = StringField()
-
-        class Employee(self.Person):
-            salary = IntField()
-            details = EmbeddedDocumentField(EmployeeDetails)
-
-        # Create employee object and save it to the database
-        employee = Employee(name='Test Employee', age=50, salary=20000)
-        employee.details = EmployeeDetails(position='Developer')
-        employee.save()
-
-        # Ensure that the object is in the database
-        collection = self.db[self.Person._meta['collection']]
-        employee_obj = collection.find_one({'name': 'Test Employee'})
-        self.assertEqual(employee_obj['name'], 'Test Employee')
-        self.assertEqual(employee_obj['age'], 50)
-        # Ensure that the 'details' embedded object saved correctly
-        self.assertEqual(employee_obj['details']['position'], 'Developer')
-
-    def test_save_reference(self):
-        """Ensure that a document reference field may be saved in the database.
-        """
-        
-        class BlogPost(Document):
-            meta = {'collection': 'blogpost_1'}
-            content = StringField()
-            author = ReferenceField(self.Person)
-
-        BlogPost.drop_collection()
-
-        author = self.Person(name='Test User')
-        author.save()
-
-        post = BlogPost(content='Watched some TV today... how exciting.')
-        # Should only reference author when saving
-        post.author = author
-        post.save()
-
-        post_obj = BlogPost.objects.first()
-
-        # Test laziness
-        self.assertTrue(isinstance(post_obj._data['author'], 
-                                   pymongo.dbref.DBRef))
-        self.assertTrue(isinstance(post_obj.author, self.Person))
-        self.assertEqual(post_obj.author.name, 'Test User')
-
-        # Ensure that the dereferenced object may be changed and saved
-        post_obj.author.age = 25
-        post_obj.author.save()
-
-        author = list(self.Person.objects(name='Test User'))[-1]
-        self.assertEqual(author.age, 25)
-
-        BlogPost.drop_collection()
-
-    def tearDown(self):
-        self.Person.drop_collection()
-
-
-if __name__ == '__main__':
-    unittest.main()

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 +1,350 @@
+# -*- coding: utf-8 -*-
+import unittest
+
+from mongoengine import *
+
+from mongoengine.queryset import NULLIFY, PULL
+from mongoengine.connection import get_db
+
+__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': [] })
+
+    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.py

@@ -1,246 +0,0 @@
-import unittest
-import datetime
-
-from mongoengine import *
-from mongoengine.connection import _get_db
-
-
-class FieldTest(unittest.TestCase):
-
-    def setUp(self):
-        connect(db='mongoenginetest')
-        self.db = _get_db()
-
-    def test_default_values(self):
-        """Ensure that default field values are used when creating a document.
-        """
-        class Person(Document):
-            name = StringField()
-            age = IntField(default=30)
-            userid = StringField(default=lambda: 'test')
-
-        person = Person(name='Test Person')
-        self.assertEqual(person._data['age'], 30)
-        self.assertEqual(person._data['userid'], 'test')
-
-    def test_required_values(self):
-        """Ensure that required field constraints are enforced.
-        """
-        class Person(Document):
-            name = StringField(required=True)
-            age = IntField(required=True)
-            userid = StringField()
-
-        person = Person(name="Test User")
-        self.assertRaises(ValidationError, person.validate)
-        person = Person(age=30)
-        self.assertRaises(ValidationError, person.validate)
-
-    def test_object_id_validation(self):
-        """Ensure that invalid values cannot be assigned to string fields.
-        """
-        class Person(Document):
-            name = StringField()
-        
-        person = Person(name='Test User')
-        self.assertEqual(person.id, None)
-
-        person.id = 47
-        self.assertRaises(ValidationError, person.validate)
-
-        person.id = 'abc'
-        self.assertRaises(ValidationError, person.validate)
-
-        person.id = '497ce96f395f2f052a494fd4'
-        person.validate()
-
-    def test_string_validation(self):
-        """Ensure that invalid values cannot be assigned to string fields.
-        """
-        class Person(Document):
-            name = StringField(max_length=20)
-            userid = StringField(r'[0-9a-z_]+$')
-
-        person = Person(name=34)
-        self.assertRaises(ValidationError, person.validate)
-
-        # Test regex validation on userid
-        person = Person(userid='test.User')
-        self.assertRaises(ValidationError, person.validate)
-
-        person.userid = 'test_user'
-        self.assertEqual(person.userid, 'test_user')
-        person.validate()
-
-        # Test max length validation on name
-        person = Person(name='Name that is more than twenty characters')
-        self.assertRaises(ValidationError, person.validate)
-
-        person.name = 'Shorter name'
-        person.validate()
-
-    def test_int_validation(self):
-        """Ensure that invalid values cannot be assigned to int fields.
-        """
-        class Person(Document):
-            age = IntField(min_value=0, max_value=110)
-
-        person = Person()
-        person.age = 50
-        person.validate()
-
-        person.age = -1
-        self.assertRaises(ValidationError, person.validate)
-        person.age = 120
-        self.assertRaises(ValidationError, person.validate)
-        person.age = 'ten'
-        self.assertRaises(ValidationError, person.validate)
-
-    def test_float_validation(self):
-        """Ensure that invalid values cannot be assigned to float fields.
-        """
-        class Person(Document):
-            height = FloatField(min_value=0.1, max_value=3.5)
-
-        person = Person()
-        person.height = 1.89
-        person.validate()
-
-        person.height = 2
-        self.assertRaises(ValidationError, person.validate)
-        person.height = 0.01
-        self.assertRaises(ValidationError, person.validate)
-        person.height = 4.0
-        self.assertRaises(ValidationError, person.validate)
-
-    def test_datetime_validation(self):
-        """Ensure that invalid values cannot be assigned to datetime fields.
-        """
-        class LogEntry(Document):
-            time = DateTimeField()
-
-        log = LogEntry()
-        log.time = datetime.datetime.now()
-        log.validate()
-
-        log.time = -1
-        self.assertRaises(ValidationError, log.validate)
-        log.time = '1pm'
-        self.assertRaises(ValidationError, log.validate)
-
-    def test_list_validation(self):
-        """Ensure that a list field only accepts lists with valid elements.
-        """
-        class Comment(EmbeddedDocument):
-            content = StringField()
-
-        class BlogPost(Document):
-            content = StringField()
-            comments = ListField(EmbeddedDocumentField(Comment))
-            tags = ListField(StringField())
-
-        post = BlogPost(content='Went for a walk today...')
-        post.validate()
-
-        post.tags = 'fun'
-        self.assertRaises(ValidationError, post.validate)
-        post.tags = [1, 2]
-        self.assertRaises(ValidationError, post.validate)
-
-        post.tags = ['fun', 'leisure']
-        post.validate()
-        post.tags = ('fun', 'leisure')
-        post.validate()
-
-        comments = [Comment(content='Good for you'), Comment(content='Yay.')]
-        post.comments = comments
-        post.validate()
-
-        post.comments = ['a']
-        self.assertRaises(ValidationError, post.validate)
-        post.comments = 'yay'
-        self.assertRaises(ValidationError, post.validate)
-
-    def test_embedded_document_validation(self):
-        """Ensure that invalid embedded documents cannot be assigned to
-        embedded document fields.
-        """
-        class Comment(EmbeddedDocument):
-            content = StringField()
-
-        class PersonPreferences(EmbeddedDocument):
-            food = StringField()
-            number = IntField()
-
-        class Person(Document):
-            name = StringField()
-            preferences = EmbeddedDocumentField(PersonPreferences)
-
-        person = Person(name='Test User')
-        person.preferences = 'My Preferences'
-        self.assertRaises(ValidationError, person.validate)
-
-        person.preferences = Comment(content='Nice blog post...')
-        self.assertRaises(ValidationError, person.validate)
-
-        person.preferences = PersonPreferences(food='Cheese', number=47)
-        self.assertEqual(person.preferences.food, 'Cheese')
-        person.validate()
-
-    def test_embedded_document_inheritance(self):
-        """Ensure that subclasses of embedded documents may be provided to 
-        EmbeddedDocumentFields of the superclass' type.
-        """
-        class User(EmbeddedDocument):
-            name = StringField()
-
-        class PowerUser(User):
-            power = IntField()
-
-        class BlogPost(Document):
-            content = StringField()
-            author = EmbeddedDocumentField(User)
-        
-        post = BlogPost(content='What I did today...')
-        post.author = User(name='Test User')
-        post.author = PowerUser(name='Test User', power=47)
-
-    def test_reference_validation(self):
-        """Ensure that invalid docment objects cannot be assigned to reference
-        fields.
-        """
-        class User(Document):
-            name = StringField()
-
-        class BlogPost(Document):
-            content = StringField()
-            author = ReferenceField(User)
-
-        self.assertRaises(ValidationError, ReferenceField, EmbeddedDocument)
-
-        user = User(name='Test User')
-
-        # Ensure that the referenced object must have been saved
-        post1 = BlogPost(content='Chips and gravy taste good.')
-        post1.author = user
-        self.assertRaises(ValidationError, post1.save)
-
-        # Check that an invalid object type cannot be used
-        post2 = BlogPost(content='Chips and chilli taste good.')
-        post1.author = post2
-        self.assertRaises(ValidationError, post1.validate)
-
-        user.save()
-        post1.author = user
-        post1.save()
-
-        post2.save()
-        post1.author = post2
-        self.assertRaises(ValidationError, post1.validate)
-
-        User.drop_collection()
-        BlogPost.drop_collection()
-
-
-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

@@ -0,0 +1,60 @@
+import pickle
+from datetime import datetime
+
+from mongoengine import *
+from mongoengine import signals
+
+
+class PickleEmbedded(EmbeddedDocument):
+    date = DateTimeField(default=datetime.now)
+
+
+class PickleTest(Document):
+    number = IntField()
+    string = StringField(choices=(('One', '1'), ('Two', '2')))
+    embedded = EmbeddedDocumentField(PickleEmbedded)
+    lists = ListField(StringField())
+    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()
+
+
+class Base(Document):
+    meta = {'allow_inheritance': True}

tests/queryset.py

@@ -1,308 +0,0 @@
-import unittest
-import pymongo
-
-from mongoengine.queryset import QuerySet
-from mongoengine import *
-
-
-class QuerySetTest(unittest.TestCase):
-    
-    def setUp(self):
-        connect(db='mongoenginetest')
-
-        class Person(Document):
-            name = StringField()
-            age = IntField()
-        self.Person = Person
-
-    def test_initialisation(self):
-        """Ensure that CollectionManager is correctly initialised.
-        """
-        self.assertTrue(isinstance(self.Person.objects, QuerySet))
-        self.assertEqual(self.Person.objects._collection.name(), 
-                         self.Person._meta['collection'])
-        self.assertTrue(isinstance(self.Person.objects._collection,
-                                   pymongo.collection.Collection))
-
-    def test_transform_query(self):
-        """Ensure that the _transform_query function operates correctly.
-        """
-        self.assertEqual(QuerySet._transform_query(name='test', age=30),
-                         {'name': 'test', 'age': 30})
-        self.assertEqual(QuerySet._transform_query(age__lt=30), 
-                         {'age': {'$lt': 30}})
-        self.assertEqual(QuerySet._transform_query(age__gt=20, age__lt=50),
-                         {'age': {'$gt': 20, '$lt': 50}})
-        self.assertEqual(QuerySet._transform_query(age=20, age__gt=50),
-                         {'age': 20})
-        self.assertEqual(QuerySet._transform_query(friend__age__gte=30), 
-                         {'friend.age': {'$gte': 30}})
-        self.assertEqual(QuerySet._transform_query(name__exists=True), 
-                         {'name': {'$exists': True}})
-
-    def test_find(self):
-        """Ensure that a query returns a valid set of results.
-        """
-        person1 = self.Person(name="User A", age=20)
-        person1.save()
-        person2 = self.Person(name="User B", age=30)
-        person2.save()
-
-        # Find all people in the collection
-        people = self.Person.objects
-        self.assertEqual(len(people), 2)
-        results = list(people)
-        self.assertTrue(isinstance(results[0], self.Person))
-        self.assertTrue(isinstance(results[0].id, (pymongo.objectid.ObjectId,
-                                                    str, unicode)))
-        self.assertEqual(results[0].name, "User A")
-        self.assertEqual(results[0].age, 20)
-        self.assertEqual(results[1].name, "User B")
-        self.assertEqual(results[1].age, 30)
-
-        # Use a query to filter the people found to just person1
-        people = self.Person.objects(age=20)
-        self.assertEqual(len(people), 1)
-        person = people.next()
-        self.assertEqual(person.name, "User A")
-        self.assertEqual(person.age, 20)
-
-        # Test limit
-        people = list(self.Person.objects.limit(1))
-        self.assertEqual(len(people), 1)
-        self.assertEqual(people[0].name, 'User A')
-
-        # Test skip
-        people = list(self.Person.objects.skip(1))
-        self.assertEqual(len(people), 1)
-        self.assertEqual(people[0].name, 'User B')
-
-        person3 = self.Person(name="User C", age=40)
-        person3.save()
-
-        # Test slice limit
-        people = list(self.Person.objects[:2])
-        self.assertEqual(len(people), 2)
-        self.assertEqual(people[0].name, 'User A')
-        self.assertEqual(people[1].name, 'User B')
-
-        # Test slice skip
-        people = list(self.Person.objects[1:])
-        self.assertEqual(len(people), 2)
-        self.assertEqual(people[0].name, 'User B')
-        self.assertEqual(people[1].name, 'User C')
-
-        # Test slice limit and skip
-        people = list(self.Person.objects[1:2])
-        self.assertEqual(len(people), 1)
-        self.assertEqual(people[0].name, 'User B')
-
-    def test_find_one(self):
-        """Ensure that a query using find_one returns a valid result.
-        """
-        person1 = self.Person(name="User A", age=20)
-        person1.save()
-        person2 = self.Person(name="User B", age=30)
-        person2.save()
-
-        # Retrieve the first person from the database
-        person = self.Person.objects.first()
-        self.assertTrue(isinstance(person, self.Person))
-        self.assertEqual(person.name, "User A")
-        self.assertEqual(person.age, 20)
-
-        # Use a query to filter the people found to just person2
-        person = self.Person.objects(age=30).first()
-        self.assertEqual(person.name, "User B")
-
-        person = self.Person.objects(age__lt=30).first()
-        self.assertEqual(person.name, "User A")
-
-        # Use array syntax
-        person = self.Person.objects[0]
-        self.assertEqual(person.name, "User A")
-
-        person = self.Person.objects[1]
-        self.assertEqual(person.name, "User B")
-
-        self.assertRaises(IndexError, self.Person.objects.__getitem__, 2)
-        
-        # Find a document using just the object id
-        person = self.Person.objects.with_id(person1.id)
-        self.assertEqual(person.name, "User A")
-
-    def test_find_embedded(self):
-        """Ensure that an embedded document is properly returned from a query.
-        """
-        class User(EmbeddedDocument):
-            name = StringField()
-
-        class BlogPost(Document):
-            content = StringField()
-            author = EmbeddedDocumentField(User)
-
-        post = BlogPost(content='Had a good coffee today...')
-        post.author = User(name='Test User')
-        post.save()
-
-        result = BlogPost.objects.first()
-        self.assertTrue(isinstance(result.author, User))
-        self.assertEqual(result.author.name, 'Test User')
-        
-        BlogPost.drop_collection()
-
-    def test_delete(self):
-        """Ensure that documents are properly deleted from the database.
-        """
-        self.Person(name="User A", age=20).save()
-        self.Person(name="User B", age=30).save()
-        self.Person(name="User C", age=40).save()
-
-        self.assertEqual(len(self.Person.objects), 3)
-
-        self.Person.objects(age__lt=30).delete()
-        self.assertEqual(len(self.Person.objects), 2)
-
-        self.Person.objects.delete()
-        self.assertEqual(len(self.Person.objects), 0)
-
-    def test_order_by(self):
-        """Ensure that QuerySets may be ordered.
-        """
-        self.Person(name="User A", age=20).save()
-        self.Person(name="User B", age=40).save()
-        self.Person(name="User C", age=30).save()
-
-        names = [p.name for p in self.Person.objects.order_by('-age')]
-        self.assertEqual(names, ['User B', 'User C', 'User A'])
-
-        names = [p.name for p in self.Person.objects.order_by('+age')]
-        self.assertEqual(names, ['User A', 'User C', 'User B'])
-
-        names = [p.name for p in self.Person.objects.order_by('age')]
-        self.assertEqual(names, ['User A', 'User C', 'User B'])
-        
-        ages = [p.age for p in self.Person.objects.order_by('-name')]
-        self.assertEqual(ages, [30, 40, 20])
-
-    def test_item_frequencies(self):
-        """Ensure that item frequencies are properly generated from lists.
-        """
-        class BlogPost(Document):
-            hits = IntField()
-            tags = ListField(StringField(), name='blogTags')
-
-        BlogPost.drop_collection()
-
-        BlogPost(hits=1, tags=['music', 'film', 'actors']).save()
-        BlogPost(hits=2, tags=['music']).save()
-        BlogPost(hits=3, tags=['music', 'actors']).save()
-
-        f = BlogPost.objects.item_frequencies('tags')
-        f = dict((key, int(val)) for key, val in f.items())
-        self.assertEqual(set(['music', 'film', 'actors']), set(f.keys()))
-        self.assertEqual(f['music'], 3)
-        self.assertEqual(f['actors'], 2)
-        self.assertEqual(f['film'], 1)
-
-        # Ensure query is taken into account
-        f = BlogPost.objects(hits__gt=1).item_frequencies('tags')
-        f = dict((key, int(val)) for key, val in f.items())
-        self.assertEqual(set(['music', 'actors']), set(f.keys()))
-        self.assertEqual(f['music'], 2)
-        self.assertEqual(f['actors'], 1)
-
-        # Check that normalization works
-        f = BlogPost.objects.item_frequencies('tags', normalize=True)
-        self.assertAlmostEqual(f['music'], 3.0/6.0)
-        self.assertAlmostEqual(f['actors'], 2.0/6.0)
-        self.assertAlmostEqual(f['film'], 1.0/6.0)
-
-        BlogPost.drop_collection()
-
-    def test_average(self):
-        """Ensure that field can be averaged correctly.
-        """
-        ages = [23, 54, 12, 94, 27]
-        for i, age in enumerate(ages):
-            self.Person(name='test%s' % i, age=age).save()
-
-        avg = float(sum(ages)) / len(ages)
-        self.assertAlmostEqual(int(self.Person.objects.average('age')), avg)
-
-        self.Person(name='ageless person').save()
-        self.assertEqual(int(self.Person.objects.average('age')), avg)
-
-    def test_sum(self):
-        """Ensure that field can be summed over correctly.
-        """
-        ages = [23, 54, 12, 94, 27]
-        for i, age in enumerate(ages):
-            self.Person(name='test%s' % i, age=age).save()
-
-        self.assertEqual(int(self.Person.objects.sum('age')), sum(ages))
-
-        self.Person(name='ageless person').save()
-        self.assertEqual(int(self.Person.objects.sum('age')), sum(ages))
-
-    def test_custom_manager(self):
-        """Ensure that custom QuerySetManager instances work as expected.
-        """
-        class BlogPost(Document):
-            tags = ListField(StringField())
-
-            @queryset_manager
-            def music_posts(queryset):
-                return queryset(tags='music')
-
-        BlogPost.drop_collection()
-
-        post1 = BlogPost(tags=['music', 'film'])
-        post1.save()
-        post2 = BlogPost(tags=['music'])
-        post2.save()
-        post3 = BlogPost(tags=['film', 'actors'])
-        post3.save()
-
-        self.assertEqual([p.id for p in BlogPost.objects],
-                         [post1.id, post2.id, post3.id])
-        self.assertEqual([p.id for p in BlogPost.music_posts],
-                         [post1.id, post2.id])
-
-        BlogPost.drop_collection()
-
-    def test_query_field_name(self):
-        """Ensure that the correct field name is used when querying.
-        """
-        class Comment(EmbeddedDocument):
-            content = StringField(name='commentContent')
-
-        class BlogPost(Document):
-            title = StringField(name='postTitle')
-            comments = ListField(EmbeddedDocumentField(Comment),
-                                 name='postComments')
-                                 
-
-        BlogPost.drop_collection()
-
-        data = {'title': 'Post 1', 'comments': [Comment(content='test')]}
-        BlogPost(**data).save()
-
-        self.assertTrue('postTitle' in 
-                        BlogPost.objects(title=data['title'])._query)
-        self.assertFalse('title' in 
-                         BlogPost.objects(title=data['title'])._query)
-        self.assertEqual(len(BlogPost.objects(title=data['title'])), 1)
-
-        self.assertTrue('postComments.commentContent' in 
-                        BlogPost.objects(comments__content='test')._query)
-        self.assertEqual(len(BlogPost.objects(comments__content='test')), 1)
-
-        BlogPost.drop_collection()
-
-    def tearDown(self):
-        self.Person.drop_collection()
-
-
-if __name__ == '__main__':
-    unittest.main()

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 *