v0.14.1 version bump + updated changelog

Add missing dunder method  - __ne__ to the class GridFSProxy class

.gitignore

@@ -17,3 +17,4 @@ tests/test_bugfix.py
 htmlcov/
 venv
 venv3
+scratchpad

.install_mongodb_on_travis.sh

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

.travis.yml

@@ -1,28 +1,54 @@
+# 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'
-- '3.3'
-- '3.4'
-- '3.5'
+- 2.7
+- 3.5
+- 3.6
 - pypy
-- pypy3
 
 env:
-- PYMONGO=2.7
-- PYMONGO=2.8
-- PYMONGO=3.0
-- PYMONGO=dev
+- 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
+  - python: 3.6
+    env: MONGODB=2.4 PYMONGO=3.0
+  - python: 3.6
+    env: MONGODB=3.0 PYMONGO=3.0
+
 before_install:
-- travis_retry sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 7F0CEB10
-- echo 'deb http://downloads-distro.mongodb.org/repo/ubuntu-upstart dist 10gen' |
-  sudo tee /etc/apt/sources.list.d/mongodb.list
-- travis_retry sudo apt-get update
-- travis_retry sudo apt-get install mongodb-org-server
+- bash .install_mongodb_on_travis.sh
+- sleep 15  # https://docs.travis-ci.com/user/database-setup/#MongoDB-does-not-immediately-accept-connections
+- mongo --eval 'db.version();'
 
 install:
 - sudo apt-get install python-dev python3-dev libopenjpeg-dev zlib1g-dev libjpeg-turbo8-dev
@@ -30,14 +56,17 @@ install:
   python-tk
 - travis_retry pip install --upgrade pip
 - travis_retry pip install coveralls
-- travis_retry pip install flake8
+- 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 tox -e flake8; fi
+- 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
@@ -45,22 +74,34 @@ script:
 # 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_script:
+after_success:
 - if [[ $TRAVIS_PYTHON_VERSION == '2.7' ]]; then coveralls --verbose; fi
 
 notifications:
   irc: irc.freenode.org#mongoengine
 
+# Only run builds on the master branch and GitHub releases (tagged as vX.Y.Z)
 branches:
   only:
   - master
   - /^v.*$/
 
+# Whenever a new release is created via GitHub, publish it on PyPI.
 deploy:
   provider: pypi
   user: the_drow
   password:
     secure: QMyatmWBnC6ZN3XLW2+fTBDU4LQcp1m/LjR2/0uamyeUzWKdlOoh/Wx5elOgLwt/8N9ppdPeG83ose1jOz69l5G0MUMjv8n/RIcMFSpCT59tGYqn3kh55b0cIZXFT9ar+5cxlif6a5rS72IHm5li7QQyxexJIII6Uxp0kpvUmek=
+
+  # create a source distribution and a pure python wheel for faster installs
+  distributions: "sdist bdist_wheel"
+
+  # only deploy on tagged commits (aka GitHub releases) and only for the
+  # parent repo's builds running Python 2.7 along with PyMongo v3.0 (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

@@ -243,3 +243,5 @@ that much better:
  * Victor Varvaryuk
  * Stanislav Kaledin (https://github.com/sallyruthstruik)
  * Dmitry Yantsen (https://github.com/mrTable)
+ * Renjianxin (https://github.com/Davidrjx)
+ * Erdenezul Batmunkh (https://github.com/erdenezul)

CONTRIBUTING.rst

@@ -14,13 +14,13 @@ 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
+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 2.6 and newer. Language
+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.
@@ -29,19 +29,20 @@ 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>`_
+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 by Travis. Any pull requests
-without tests will take longer to be integrated and might be refused.
+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 PullRequest if you don't know
+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.
 
@@ -49,13 +50,18 @@ 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 every Python and PyMongo versions.
-  You can test on these versions locally by executing ``tox``
-- Add enhancements or problematic bug fixes to docs/changelog.rst
+- 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
@@ -69,3 +75,8 @@ just make your changes to the inline documentation of the appropriate
 branch and submit a `pull request <https://help.github.com/articles/using-pull-requests>`_.
 You might also use the github `Edit <https://github.com/blog/844-forking-with-the-edit-button>`_
 button.
+
+If you want to test your documentation changes locally, you need to install
+the ``sphinx`` and ``sphinx_rtd_theme`` packages. Once these are installed,
+go to the ``docs`` directory, run ``make html`` and inspect the updated docs
+by running ``open _build/html/index.html``.

README.rst

@@ -19,32 +19,42 @@ MongoEngine
 About
 =====
 MongoEngine is a Python Object-Document Mapper for working with MongoDB.
-Documentation available at https://mongoengine-odm.readthedocs.io - there is currently
-a `tutorial <https://mongoengine-odm.readthedocs.io/tutorial.html>`_, a `user guide
-<https://mongoengine-odm.readthedocs.io/guide/index.html>`_ and an `API reference
-<https://mongoengine-odm.readthedocs.io/apireference.html>`_.
+Documentation is available at https://mongoengine-odm.readthedocs.io - there
+is currently a `tutorial <https://mongoengine-odm.readthedocs.io/tutorial.html>`_,
+a `user guide <https://mongoengine-odm.readthedocs.io/guide/index.html>`_, and
+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
 ============
 We recommend the use of `virtualenv <https://virtualenv.pypa.io/>`_ and of
 `pip <https://pip.pypa.io/>`_. You can then use ``pip install -U mongoengine``.
-You may also have `setuptools <http://peak.telecommunity.com/DevCenter/setuptools>`_ and thus
-you can use ``easy_install -U mongoengine``. Otherwise, you can download the
+You may also have `setuptools <http://peak.telecommunity.com/DevCenter/setuptools>`_
+and thus you can use ``easy_install -U mongoengine``. Otherwise, you can download the
 source from `GitHub <http://github.com/MongoEngine/mongoengine>`_ and run ``python
 setup.py install``.
 
 Dependencies
 ============
-- pymongo>=2.7.1
-- sphinx (optional - for documentation generation)
+All of the dependencies can easily be installed via `pip <https://pip.pypa.io/>`_.
+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:
 
-Optional Dependencies
----------------------
-- **Image Fields**: Pillow>=2.0.0
 - dateutil>=2.1.0
 
-.. note
-   MongoEngine always runs it's test suite against the latest patch version of each dependecy. e.g.: PyMongo 3.0.1
+If you need to use an ``ImageField`` or ``ImageGridFsProxy``:
+
+- Pillow>=2.0.0
 
 Examples
 ========
@@ -57,7 +67,7 @@ Some simple examples of what MongoEngine code looks like:
 
     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}
 
@@ -87,27 +97,28 @@ Some simple examples of what MongoEngine code looks like:
     ...     print
     ...
 
-    >>> len(BlogPost.objects)
+    # Count all blog posts and its subtypes
+    >>> BlogPost.objects.count()
     2
-    >>> len(TextPost.objects)
+    >>> TextPost.objects.count()
     1
-    >>> len(LinkPost.objects)
+    >>> LinkPost.objects.count()
     1
 
-    # Find tagged posts
-    >>> len(BlogPost.objects(tags='mongoengine'))
+    # Count tagged posts
+    >>> 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 have ``nose`` installed. Then, run: ``python setup.py nosetests``.
+the standard port and have ``nose`` installed. Then, run ``python setup.py nosetests``.
 
-To run the test suite on every supported Python version and every supported PyMongo version,
-you can use ``tox``.
-tox and each supported Python version should be installed in your environment:
+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
 
@@ -116,13 +127,16 @@ tox and each supported Python version should be installed in your environment:
     # Run the test suites
     $ tox
 
-If you wish to run one single or selected tests, use the nosetest convention. It will find the folder,
-eventually the file, go to the TestClass specified after the colon and eventually right to the single test.
-Also use the -s argument if you want to print out whatever or access pdb while testing.
+If you wish to run a subset of tests, use the nosetests convention:
 
 .. code-block:: shell
 
-    $ python setup.py nosetests --tests tests/fields/fields.py:FieldTest.test_cls_field -s
+    # 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
 =========
@@ -130,8 +144,7 @@ Community
   <http://groups.google.com/group/mongoengine-users>`_
 - `MongoEngine Developers mailing list
   <http://groups.google.com/group/mongoengine-dev>`_
-- `#mongoengine IRC channel <http://webchat.freenode.net/?channels=mongoengine>`_
 
 Contributing
 ============
-We welcome contributions! see  the `Contribution guidelines <https://github.com/MongoEngine/mongoengine/blob/master/CONTRIBUTING.rst>`_
+We welcome contributions! See the `Contribution guidelines <https://github.com/MongoEngine/mongoengine/blob/master/CONTRIBUTING.rst>`_

docs/_themes/sphinx_rtd_theme/__init__.py

@@ -1,17 +0,0 @@
-"""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

@@ -1,15 +0,0 @@
-<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

@@ -1,30 +0,0 @@
-<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

@@ -1,142 +0,0 @@
-{# 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

@@ -1,205 +0,0 @@
-{#
-    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

@@ -1,50 +0,0 @@
-{#
-    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

@@ -1,5 +0,0 @@
-<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

@@ -1 +0,0 @@
-.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

@@ -1,399 +0,0 @@
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-<metadata></metadata>
-<defs>
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docs/_themes/sphinx_rtd_theme/static/js/theme.js

@@ -1,16 +0,0 @@
-$( 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

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

docs/_themes/sphinx_rtd_theme/versions.html

@@ -1,37 +0,0 @@
-{% 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/changelog.rst

@@ -4,13 +4,49 @@ Changelog
 
 Development
 ===========
-- (Fill this out as you fix issues and develop you features).
+- (Fill this out as you fix issues and develop your features).
+
+Changes in 0.14.1
+=================
+- Removed SemiStrictDict and started using a regular dict for `BaseDocument._data` #1630
+- Added support for the `$position` param in the `$push` operator #1566
+- Fixed `DateTimeField` interpreting an empty string as today #1533
+- Added a missing `__ne__` method to the `GridFSProxy` class #1632
+- Fixed `BaseQuerySet._fields_to_db_fields` #1553
+
+Changes in 0.14.0
+=================
+- BREAKING CHANGE: Removed the `coerce_types` param from `QuerySet.as_pymongo` #1549
+- POTENTIAL BREAKING CHANGE: Made EmbeddedDocument not hashable by default #1528
+- Improved code quality #1531, #1540, #1541, #1547
+
+Changes in 0.13.0
+=================
+- POTENTIAL BREAKING CHANGE: Added Unicode support to the `EmailField`, see
+  docs/upgrade.rst for details.
+
+Changes in 0.12.0
+=================
+- POTENTIAL BREAKING CHANGE: Fixed limit/skip/hint/batch_size chaining #1476
+- POTENTIAL BREAKING CHANGE: Changed a public `QuerySet.clone_into` method to a private `QuerySet._clone_into` #1476
+- Fixed the way `Document.objects.create` works with duplicate IDs #1485
+- Fixed connecting to a replica set with PyMongo 2.x #1436
+- Fixed using sets in field choices #1481
+- Fixed deleting items from a `ListField` #1318
+- Fixed an obscure error message when filtering by `field__in=non_iterable`. #1237
+- Fixed behavior of a `dec` update operator #1450
+- Added a `rename` update operator #1454
+- Added validation for the `db_field` parameter #1448
+- Fixed the error message displayed when querying an `EmbeddedDocumentField` by an invalid value #1440
+- Fixed the error message displayed when validating unicode URLs #1486
+- Raise an error when trying to save an abstract document #1449
 
 Changes in 0.11.0
 =================
 - BREAKING CHANGE: Renamed `ConnectionError` to `MongoEngineConnectionError` since the former is a built-in exception name in Python v3.x. #1428
 - BREAKING CHANGE: Dropped Python 2.6 support. #1428
 - BREAKING CHANGE: `from mongoengine.base import ErrorClass` won't work anymore for any error from `mongoengine.errors` (e.g. `ValidationError`). Use `from mongoengine.errors import ErrorClass instead`. #1428
+- BREAKING CHANGE: Accessing a broken reference will raise a `DoesNotExist` error. In the past it used to return `None`. #1334
 - Fixed absent rounding for DecimalField when `force_string` is set. #1103
 
 Changes in 0.10.8

docs/conf.py

@@ -13,6 +13,10 @@
 
 import sys, os
 
+import sphinx_rtd_theme
+
+import mongoengine
+
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the
 # documentation root, use os.path.abspath to make it absolute, like shown here.
@@ -44,7 +48,6 @@ copyright = u'2009, MongoEngine Authors'
 # |version| and |release|, also used in various other places throughout the
 # built documents.
 #
-import mongoengine
 # The short X.Y version.
 version = mongoengine.get_version()
 # The full version, including alpha/beta/rc tags.
@@ -97,10 +100,12 @@ html_theme = 'sphinx_rtd_theme'
 # Theme options are theme-specific and customize the look and feel of a theme
 # further.  For a list of options available for each theme, see the
 # documentation.
-#html_theme_options = {}
+html_theme_options = {
+    'canonical_url': 'http://docs.mongoengine.org/en/latest/'
+}
 
 # Add any paths that contain custom themes here, relative to this directory.
-html_theme_path = ['_themes']
+html_theme_path = [sphinx_rtd_theme.get_html_theme_path()]
 
 # The name for this set of Sphinx documents.  If None, it defaults to
 # "<project> v<release> documentation".
@@ -199,7 +204,3 @@ latex_documents = [
 #latex_use_modindex = True
 
 autoclass_content = 'both'
-
-html_theme_options = dict(
-    canonical_url='http://docs.mongoengine.org/en/latest/'
-)

docs/guide/connecting.rst

@@ -33,7 +33,7 @@ the :attr:`host` to
     corresponding parameters in :func:`~mongoengine.connect`: ::
 
         connect(
-            name='test',
+            db='test',
             username='user',
             password='12345',
             host='mongodb://admin:qwerty@localhost/production'
@@ -42,13 +42,18 @@ the :attr:`host` to
     will establish connection to ``production`` database using
     ``admin`` username and ``qwerty`` password.
 
-ReplicaSets
-===========
+Replica Sets
+============
 
-MongoEngine supports
-:class:`~pymongo.mongo_replica_set_client.MongoReplicaSetClient`. To use them,
-please use an URI style connection and provide the ``replicaSet`` name
-in the connection kwargs.
+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 ::
@@ -59,76 +64,74 @@ queries by passing the read_preference ::
 Multiple Databases
 ==================
 
-Multiple database support was added in MongoEngine 0.6. 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.
+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::
+`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"}
+            meta = {'db_alias': 'user-db'}
 
         class Book(Document):
             name = StringField()
 
-            meta = {"db_alias": "book-db"}
+            meta = {'db_alias': 'book-db'}
 
         class AuthorBooks(Document):
             author = ReferenceField(User)
             book = ReferenceField(Book)
 
-            meta = {"db_alias": "users-books-db"}
+            meta = {'db_alias': 'users-books-db'}
 
 
 Context Managers
 ================
-Sometimes you may want to switch the database or collection to query against
-for a class.
+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
-document to.
+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 the same User document across databases::
+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"}
+        meta = {'db_alias': 'user-db'}
 
     with switch_db(User, 'archive-user-db') as User:
-        User(name="Ross").save()  # Saves the 'archive-user-db'
+        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 the same Group document across collection::
+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
+        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
-
+            Group(name='hello Group 2000 collection!').save()  # Saves in group2000 collection
 
 
 .. note:: Make sure any aliases have been registered with

docs/guide/defining-documents.rst

@@ -150,7 +150,7 @@ arguments can be set on all fields:
     .. note:: If set, this field is also accessible through the `pk` field.
 
 :attr:`choices` (Default: None)
-    An iterable (e.g. a list or tuple) of choices to which the value of this
+    An iterable (e.g. list, tuple or set) of choices to which the value of this
     field should be limited.
 
     Can be either be a nested tuples of value (stored in mongo) and a
@@ -214,8 +214,8 @@ document class as the first argument::
 
 Dictionary Fields
 -----------------
-Often, an embedded document may be used instead of a dictionary – generally 
-embedded documents are recommended as dictionaries don’t support validation 
+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::
 
@@ -361,11 +361,6 @@ Its value can take any of the following constants:
    In Django, be sure to put all apps that have such delete rule declarations in
    their :file:`models.py` in the :const:`INSTALLED_APPS` tuple.
 
-
-.. warning::
-   Signals are not triggered when doing cascading updates / deletes - if this
-   is required you must manually handle the update / delete.
-
 Generic reference fields
 ''''''''''''''''''''''''
 A second kind of reference field also exists,

docs/guide/installing.rst

@@ -2,13 +2,13 @@
 Installing MongoEngine
 ======================
 
-To use MongoEngine, you will need to download `MongoDB <http://mongodb.org/>`_
+To use MongoEngine, you will need to download `MongoDB <http://mongodb.com/>`_
 and ensure it is running in an accessible location. You will also need
 `PyMongo <http://api.mongodb.org/python>`_ to use MongoEngine, but if you
 install MongoEngine using setuptools, then the dependencies will be handled for
 you.
 
-MongoEngine is available on PyPI, so to use it you can use :program:`pip`:
+MongoEngine is available on PyPI, so you can use :program:`pip`:
 
 .. code-block:: console
 

docs/guide/querying.rst

@@ -340,14 +340,19 @@ Javascript code that is executed on the database server.
 
 Counting results
 ----------------
-Just as with limiting and skipping results, there is a method on
-:class:`~mongoengine.queryset.QuerySet` objects --
-:meth:`~mongoengine.queryset.QuerySet.count`, but there is also a more Pythonic
-way of achieving this::
+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 = len(User.objects)
+    num_users = User.objects.count()
 
-Even if len() is the Pythonic way of counting results, keep in mind that if you concerned about performance, :meth:`~mongoengine.queryset.QuerySet.count` is the way to go since it only execute a server side count query, while len() retrieves the results, places them in cache, and finally counts them. If we compare the performance of the two operations, len() is much slower than :meth:`~mongoengine.queryset.QuerySet.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
 -------------------
@@ -479,6 +484,8 @@ 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()))
 
@@ -558,6 +565,15 @@ cannot use the `$` syntax in keyword arguments it has been mapped to `S`::
     >>> post.tags
     ['database', 'mongodb']
 
+From MongoDB version 2.6, push operator supports $position value which allows
+to push values with index.
+    >>> post = BlogPost(title="Test", tags=["mongo"])
+    >>> post.save()
+    >>> post.update(push__tags__0=["database", "code"])
+    >>> post.reload()
+    >>> post.tags
+    ['database', 'code', 'mongo']
+
 .. note::
     Currently only top level lists are handled, future versions of mongodb /
     pymongo plan to support nested positional operators.  See `The $ positional

docs/guide/signals.rst

@@ -142,11 +142,4 @@ cleaner looking while still allowing manual execution of the callback::
         modified = DateTimeField()
 
 
-ReferenceFields and Signals
----------------------------
-
-Currently `reverse_delete_rule` does not trigger signals on the other part of
-the relationship.  If this is required you must manually handle the
-reverse deletion.
-
 .. _blinker: http://pypi.python.org/pypi/blinker

docs/tutorial.rst

@@ -3,11 +3,10 @@ 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
-of blog where posts are not constrained to being conventional text-based posts.
-As well as text-based entries, users may post images, links, videos, etc. For
-simplicity's sake, we'll stick to text, image and link entries in our
-application. As the purpose of this tutorial is to introduce MongoEngine, we'll
+through how to create a simple **Tumblelog** application. A tumblelog is a
+blog that supports mixed media content, including text, images, links, video,
+audio, etc. For simplicity's sake, we'll stick to text, image, and link
+entries. 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.
 
@@ -16,14 +15,14 @@ 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. If you haven't installed mongoengine,
+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. If running locally the only argument we need to provide is the name
+function. If running locally, the only argument we need to provide is the name
 of the MongoDB database to use::
 
     from mongoengine import *
@@ -39,18 +38,18 @@ 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
-iron out bugs involving incorrect types or missing fields, and also allow us to
+to the data model. However, defining schemas for our documents can help to iron
+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 of
 **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
-specific 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 other document models are slightly
 more involved.
 
@@ -78,7 +77,7 @@ 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
@@ -96,7 +95,7 @@ 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 --- all you need do is turn on inheritance
+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):
@@ -128,8 +127,8 @@ 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
-size of our database. So let's take a look that the code our modified
+than a document's id), this denormalization won't impact the size of the
+database very strongly. Let's take a look at the code of our modified
 :class:`Post` class::
 
     class Post(Document):
@@ -141,7 +140,7 @@ The :class:`~mongoengine.fields.ListField` object that is used to define a Post'
 takes a field object as its first argument --- this means that you can have
 lists of any type of field (including lists).
 
-.. note:: We don't need to modify the specialised post types as they all
+.. note:: We don't need to modify the specialized post types as they all
     inherit from :class:`Post`.
 
 Comments
@@ -149,7 +148,7 @@ 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
@@ -207,7 +206,10 @@ object::
         ross.last_name = 'Lawley'
         ross.save()
 
-Now that we've got our user in the database, let's add a couple of posts::
+Assign another user to a variable called ``john``, just like we did above with
+``ross``.
+
+Now that we've got our users in the database, let's add a couple of posts::
 
     post1 = TextPost(title='Fun with MongoEngine', author=john)
     post1.content = 'Took a look at MongoEngine today, looks pretty cool.'
@@ -219,8 +221,8 @@ Now that we've got our user in the database, let's add a couple of posts::
     post2.tags = ['mongoengine']
     post2.save()
 
-.. note:: If you change a field on a object that has already been saved, then
-    call :meth:`save` again, the document will be updated.
+.. note:: If you change a field on an object that has already been saved and
+    then call :meth:`save` again, the document will be updated.
 
 Accessing our data
 ==================
@@ -232,17 +234,17 @@ used to access the documents in the database collection associated with that
 class. So let's see how we can get our posts' titles::
 
     for post in Post.objects:
-        print post.title
+        print(post.title)
 
 Retrieving type-specific information
 ------------------------------------
 
-This will print the titles of our posts, one on each line. But What if we want
+This will print the titles of our posts, one on each line. But what if we want
 to access the type-specific data (link_url, content, etc.)? One way is simply
 to use the :attr:`objects` attribute of a subclass of :class:`Post`::
 
     for post in TextPost.objects:
-        print post.content
+        print(post.content)
 
 Using TextPost's :attr:`objects` attribute only returns documents that were
 created using :class:`TextPost`. Actually, there is a more general rule here:
@@ -259,16 +261,14 @@ instances of :class:`Post` --- they were instances of the subclass of
 practice::
 
     for post in Post.objects:
-        print post.title
-        print '=' * len(post.title)
+        print(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
+            print('Link: {}'.format(post.link_url))
 
 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.
@@ -283,7 +283,7 @@ your query.  Let's adjust our query so that only posts with the tag "mongodb"
 are returned::
 
     for post in Post.objects(tags='mongodb'):
-        print post.title
+        print(post.title)
 
 There are also methods available on :class:`~mongoengine.queryset.QuerySet`
 objects that allow different results to be returned, for example, calling
@@ -292,11 +292,11 @@ the first matched by the query you provide. Aggregation functions may also be
 used on :class:`~mongoengine.queryset.QuerySet` objects::
 
     num_posts = Post.objects(tags='mongodb').count()
-    print 'Found %d posts with tag "mongodb"' % num_posts
+    print('Found {} posts with tag "mongodb"'.format(num_posts))
 
-Learning more about mongoengine
+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 indepth about how to use mongoengine and mongodb.
+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

@@ -2,6 +2,46 @@
 Upgrading
 #########
 
+Development
+***********
+(Fill this out whenever you introduce breaking changes to MongoEngine)
+
+0.14.0
+******
+This release includes a few bug fixes and a significant code cleanup. The most
+important change is that `QuerySet.as_pymongo` no longer supports a
+`coerce_types` mode. If you used it in the past, a) please let us know of your
+use case, b) you'll need to override `as_pymongo` to get the desired outcome.
+
+This release also makes the EmbeddedDocument not hashable by default. If you
+use embedded documents in sets or dictionaries, you might have to override
+`__hash__` and implement a hashing logic specific to your use case. See #1528
+for the reason behind this change.
+
+0.13.0
+******
+This release adds Unicode support to the `EmailField` and changes its
+structure significantly. Previously, email addresses containing Unicode
+characters didn't work at all. Starting with v0.13.0, domains with Unicode
+characters are supported out of the box, meaning some emails that previously
+didn't pass validation now do. Make sure the rest of your application can
+accept such email addresses. Additionally, if you subclassed the `EmailField`
+in your application and overrode `EmailField.EMAIL_REGEX`, you will have to
+adjust your code to override `EmailField.USER_REGEX`, `EmailField.DOMAIN_REGEX`,
+and potentially `EmailField.UTF8_USER_REGEX`.
+
+0.12.0
+******
+This release includes various fixes for the `BaseQuerySet` methods and how they
+are chained together. Since version 0.10.1 applying limit/skip/hint/batch_size
+to an already-existing queryset wouldn't modify the underlying PyMongo cursor.
+This has been fixed now, so you'll need to make sure that your code didn't rely
+on the broken implementation.
+
+Additionally, a public `BaseQuerySet.clone_into` has been renamed to a private
+`_clone_into`. If you directly used that method in your code, you'll need to
+rename its occurrences.
+
 0.11.0
 ******
 This release includes a major rehaul of MongoEngine's code quality and

mongoengine/__init__.py

@@ -23,7 +23,7 @@ __all__ = (list(document.__all__) + list(fields.__all__) +
            list(signals.__all__) + list(errors.__all__))
 
 
-VERSION = (0, 11, 0)
+VERSION = (0, 14, 1)
 
 
 def get_version():

mongoengine/base/common.py

@@ -5,7 +5,7 @@ __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'])
+                        'set_on_insert', 'min', 'max', 'rename'])
 
 
 _document_registry = {}

mongoengine/base/datastructures.py

@@ -127,7 +127,7 @@ class BaseList(list):
         return value
 
     def __iter__(self):
-        for i in xrange(self.__len__()):
+        for i in six.moves.range(self.__len__()):
             yield self[i]
 
     def __setitem__(self, key, value, *args, **kwargs):
@@ -138,10 +138,7 @@ class BaseList(list):
         return super(BaseList, self).__setitem__(key, value)
 
     def __delitem__(self, key, *args, **kwargs):
-        if isinstance(key, slice):
-            self._mark_as_changed()
-        else:
-            self._mark_as_changed(key)
+        self._mark_as_changed()
         return super(BaseList, self).__delitem__(key)
 
     def __setslice__(self, *args, **kwargs):
@@ -432,7 +429,7 @@ class StrictDict(object):
     def __eq__(self, other):
         return self.items() == other.items()
 
-    def __neq__(self, other):
+    def __ne__(self, other):
         return self.items() != other.items()
 
     @classmethod
@@ -448,42 +445,3 @@ class StrictDict(object):
 
             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/document.py

@@ -13,13 +13,13 @@ from mongoengine import signals
 from mongoengine.base.common import get_document
 from mongoengine.base.datastructures import (BaseDict, BaseList,
                                              EmbeddedDocumentList,
-                                             SemiStrictDict, StrictDict)
+                                             StrictDict)
 from mongoengine.base.fields import ComplexBaseField
 from mongoengine.common import _import_class
 from mongoengine.errors import (FieldDoesNotExist, InvalidDocumentError,
                                 LookUpError, OperationError, ValidationError)
 
-__all__ = ('BaseDocument',)
+__all__ = ('BaseDocument', 'NON_FIELD_ERRORS')
 
 NON_FIELD_ERRORS = '__all__'
 
@@ -79,8 +79,7 @@ class BaseDocument(object):
         if self.STRICT and not self._dynamic:
             self._data = StrictDict.create(allowed_keys=self._fields_ordered)()
         else:
-            self._data = SemiStrictDict.create(
-                allowed_keys=self._fields_ordered)()
+            self._data = {}
 
         self._dynamic_fields = SON()
 
@@ -272,13 +271,6 @@ class BaseDocument(object):
     def __ne__(self, other):
         return not self.__eq__(other)
 
-    def __hash__(self):
-        if getattr(self, 'pk', None) is None:
-            # For new object
-            return super(BaseDocument, self).__hash__()
-        else:
-            return hash(self.pk)
-
     def clean(self):
         """
         Hook for doing document level data cleaning before validation is run.
@@ -402,9 +394,11 @@ class BaseDocument(object):
             raise ValidationError(message, errors=errors)
 
     def to_json(self, *args, **kwargs):
-        """Converts a document to JSON.
-        :param use_db_field: Set to True by default but enables the output of the json structure with the field names
-            and not the mongodb store db_names in case of set to False
+        """Convert this document to JSON.
+
+        :param use_db_field: Serialize field names as they appear in
+            MongoDB (as opposed to attribute names on this document).
+            Defaults to True.
         """
         use_db_field = kwargs.pop('use_db_field', True)
         return json_util.dumps(self.to_mongo(use_db_field), *args, **kwargs)
@@ -675,12 +669,20 @@ class BaseDocument(object):
         if not only_fields:
             only_fields = []
 
+        if son and not isinstance(son, dict):
+            raise ValueError("The source SON object needs to be of type 'dict'")
+
         # Get the class name from the document, falling back to the given
         # class if unavailable
         class_name = son.get('_cls', cls._class_name)
 
-        # Convert SON to a dict, making sure each key is a string
-        data = {str(key): value for key, value in son.iteritems()}
+        # Convert SON to a data dict, making sure each key is a string and
+        # corresponds to the right db field.
+        data = {}
+        for key, value in son.iteritems():
+            key = str(key)
+            key = cls._db_field_map.get(key, key)
+            data[key] = value
 
         # Return correct subclass for document type
         if class_name != cls._class_name:

mongoengine/base/fields.py

@@ -41,7 +41,7 @@ class BaseField(object):
         """
         :param db_field: The database field to store this field in
             (defaults to the name of the field)
-        :param name: Depreciated - use db_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
@@ -81,6 +81,24 @@ class BaseField(object):
         self.sparse = sparse
         self._owner_document = None
 
+        # Make sure db_field is a string (if it's explicitly defined).
+        if (
+            self.db_field is not None and
+            not isinstance(self.db_field, six.string_types)
+        ):
+            raise TypeError('db_field should be a string.')
+
+        # Make sure db_field doesn't contain any forbidden characters.
+        if isinstance(self.db_field, six.string_types) and (
+            '.' in self.db_field or
+            '\0' in self.db_field or
+            self.db_field.startswith('$')
+        ):
+            raise ValueError(
+                'field names cannot contain dots (".") or null characters '
+                '("\\0"), and they must not start with a dollar sign ("$").'
+            )
+
         # Detect and report conflicts between metadata and base properties.
         conflicts = set(dir(self)) & set(kwargs)
         if conflicts:
@@ -182,7 +200,8 @@ class BaseField(object):
         EmbeddedDocument = _import_class('EmbeddedDocument')
 
         choice_list = self.choices
-        if isinstance(choice_list[0], (list, tuple)):
+        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

mongoengine/common.py

@@ -34,7 +34,10 @@ def _import_class(cls_name):
     queryset_classes = ('OperationError',)
     deref_classes = ('DeReference',)
 
-    if cls_name in doc_classes:
+    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:

mongoengine/connection.py

@@ -51,7 +51,9 @@ def register_connection(alias, name=None, host=None, port=None,
         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: allow ad-hoc parameters to be passed into the pymongo driver
+    :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
     """
@@ -66,9 +68,9 @@ def register_connection(alias, name=None, host=None, port=None,
         'authentication_mechanism': authentication_mechanism
     }
 
-    # Handle uri style connections
     conn_host = conn_settings['host']
-    # host can be a list or a string, so if string, force to a list
+
+    # 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]
 
@@ -96,7 +98,7 @@ def register_connection(alias, name=None, host=None, port=None,
 
             uri_options = uri_dict['options']
             if 'replicaset' in uri_options:
-                conn_settings['replicaSet'] = True
+                conn_settings['replicaSet'] = uri_options['replicaset']
             if 'authsource' in uri_options:
                 conn_settings['authentication_source'] = uri_options['authsource']
             if 'authmechanism' in uri_options:
@@ -144,13 +146,14 @@ def get_connection(alias=DEFAULT_CONNECTION_NAME, reconnect=False):
         raise MongoEngineConnectionError(msg)
 
     def _clean_settings(settings_dict):
-        irrelevant_fields = set([
-            'name', 'username', 'password', 'authentication_source',
-            'authentication_mechanism'
-        ])
+        # set literal more efficient than calling set function
+        irrelevant_fields_set = {
+            'name', 'username', 'password',
+            'authentication_source', 'authentication_mechanism'
+        }
         return {
             k: v for k, v in settings_dict.items()
-            if k not in irrelevant_fields
+            if k not in irrelevant_fields_set
         }
 
     # Retrieve a copy of the connection settings associated with the requested
@@ -170,23 +173,22 @@ def get_connection(alias=DEFAULT_CONNECTION_NAME, reconnect=False):
     else:
         connection_class = MongoClient
 
-        # Handle replica set connections
-        if 'replicaSet' in conn_settings:
+        # 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)
 
-            # Discard replicaSet if it's not a string
-            if not isinstance(conn_settings['replicaSet'], six.string_types):
-                del conn_settings['replicaSet']
-
-            # For replica set connections with PyMongo 2.x, use
-            # MongoReplicaSetClient.
-            # TODO remove this once we stop supporting PyMongo 2.x.
-            if not IS_PYMONGO_3:
-                connection_class = MongoReplicaSetClient
-                conn_settings['hosts_or_uri'] = conn_settings.pop('host', 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.
@@ -242,9 +244,12 @@ def connect(db=None, alias=DEFAULT_CONNECTION_NAME, **kwargs):
     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
+    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:

mongoengine/document.py

@@ -60,6 +60,12 @@ class EmbeddedDocument(BaseDocument):
     my_metaclass = DocumentMetaclass
     __metaclass__ = DocumentMetaclass
 
+    # A generic embedded document doesn't have any immutable properties
+    # that describe it uniquely, hence it shouldn't be hashable. You can
+    # define your own __hash__ method on a subclass if you need your
+    # embedded documents to be hashable.
+    __hash__ = None
+
     def __init__(self, *args, **kwargs):
         super(EmbeddedDocument, self).__init__(*args, **kwargs)
         self._instance = None
@@ -160,6 +166,15 @@ class Document(BaseDocument):
         """Set the primary key."""
         return setattr(self, self._meta['id_field'], value)
 
+    def __hash__(self):
+        """Return the hash based on the PK of this document. If it's new
+        and doesn't have a PK yet, return the default object hash instead.
+        """
+        if self.pk is None:
+            return super(BaseDocument, self).__hash__()
+        else:
+            return hash(self.pk)
+
     @classmethod
     def _get_db(cls):
         """Some Model using other db_alias"""
@@ -167,45 +182,63 @@ class Document(BaseDocument):
 
     @classmethod
     def _get_collection(cls):
-        """Returns the collection for the document."""
-        # TODO: use new get_collection() with PyMongo3 ?
+        """Return a PyMongo collection for the document."""
         if not hasattr(cls, '_collection') or cls._collection is None:
-            db = cls._get_db()
-            collection_name = cls._get_collection_name()
-            # Create collection as a capped collection if specified
-            if cls._meta.get('max_size') or cls._meta.get('max_documents'):
-                # Get max document limit and max byte size from meta
-                max_size = cls._meta.get('max_size') or 10 * 2 ** 20  # 10MB default
-                max_documents = cls._meta.get('max_documents')
-                # Round up to next 256 bytes as MongoDB would do it to avoid exception
-                if max_size % 256:
-                    max_size = (max_size // 256 + 1) * 256
 
-                if collection_name in db.collection_names():
-                    cls._collection = db[collection_name]
-                    # The collection already exists, check if its capped
-                    # options match the specified capped options
-                    options = cls._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')
-                               % cls._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
-                    cls._collection = db.create_collection(
-                        collection_name, **opts
-                    )
+            # Get the collection, either capped or regular.
+            if cls._meta.get('max_size') or cls._meta.get('max_documents'):
+                cls._collection = cls._get_capped_collection()
             else:
+                db = cls._get_db()
+                collection_name = cls._get_collection_name()
                 cls._collection = db[collection_name]
+
+            # Ensure indexes on the collection unless auto_create_index was
+            # set to False.
             if cls._meta.get('auto_create_index', True):
                 cls.ensure_indexes()
+
         return cls._collection
 
+    @classmethod
+    def _get_capped_collection(cls):
+        """Create a new or get an existing capped PyMongo collection."""
+        db = cls._get_db()
+        collection_name = cls._get_collection_name()
+
+        # Get max document limit and max byte size from meta.
+        max_size = cls._meta.get('max_size') or 10 * 2 ** 20  # 10MB default
+        max_documents = cls._meta.get('max_documents')
+
+        # MongoDB will automatically raise the size to make it a multiple of
+        # 256 bytes. We raise it here ourselves to be able to reliably compare
+        # the options below.
+        if max_size % 256:
+            max_size = (max_size // 256 + 1) * 256
+
+        # If the collection already exists and has different options
+        # (i.e. isn't capped or has different max/size), raise an error.
+        if collection_name in db.collection_names():
+            collection = db[collection_name]
+            options = collection.options()
+            if (
+                options.get('max') != max_documents or
+                options.get('size') != max_size
+            ):
+                raise InvalidCollectionError(
+                    'Cannot create collection "{}" as a capped '
+                    'collection as it already exists'.format(cls._collection)
+                )
+
+            return collection
+
+        # Create a new capped collection.
+        opts = {'capped': True, 'size': max_size}
+        if max_documents:
+            opts['max'] = max_documents
+
+        return db.create_collection(collection_name, **opts)
+
     def to_mongo(self, *args, **kwargs):
         data = super(Document, self).to_mongo(*args, **kwargs)
 
@@ -267,7 +300,7 @@ class Document(BaseDocument):
         created.
 
         :param force_insert: only try to create a new document, don't allow
-            updates of existing documents
+            updates of existing documents.
         :param validate: validates the document; set to ``False`` to skip.
         :param clean: call the document clean method, requires `validate` to be
             True.
@@ -287,7 +320,7 @@ class Document(BaseDocument):
         :param save_condition: only perform save if matching record in db
             satisfies condition(s) (e.g. version number).
             Raises :class:`OperationError` if the conditions are not satisfied
-        :parm signal_kwargs: (optional) kwargs dictionary to be passed to
+        :param signal_kwargs: (optional) kwargs dictionary to be passed to
             the signal calls.
 
         .. versionchanged:: 0.5
@@ -313,6 +346,9 @@ class Document(BaseDocument):
         .. versionchanged:: 0.10.7
             Add signal_kwargs argument
         """
+        if self._meta.get('abstract'):
+            raise InvalidDocumentError('Cannot save an abstract document.')
+
         signal_kwargs = signal_kwargs or {}
         signals.pre_save.send(self.__class__, document=self, **signal_kwargs)
 
@@ -329,68 +365,20 @@ class Document(BaseDocument):
         signals.pre_save_post_validation.send(self.__class__, document=self,
                                               created=created, **signal_kwargs)
 
+        if self._meta.get('auto_create_index', True):
+            self.ensure_indexes()
+
         try:
-            collection = self._get_collection()
-            if self._meta.get('auto_create_index', True):
-                self.ensure_indexes()
+            # Save a new document or update an existing one
             if created:
-                if force_insert:
-                    object_id = collection.insert(doc, **write_concern)
-                else:
-                    object_id = collection.save(doc, **write_concern)
-                    # In PyMongo 3.0, the save() call calls internally the _update() call
-                    # but they forget to return the _id value passed back, therefore getting it back here
-                    # Correct behaviour in 2.X and in 3.0.1+ versions
-                    if not object_id and pymongo.version_tuple == (3, 0):
-                        pk_as_mongo_obj = self._fields.get(self._meta['id_field']).to_mongo(self.pk)
-                        object_id = (
-                            self._qs.filter(pk=pk_as_mongo_obj).first() and
-                            self._qs.filter(pk=pk_as_mongo_obj).first().pk
-                        )  # TODO doesn't this make 2 queries?
+                object_id = self._save_create(doc, force_insert, write_concern)
             else:
-                object_id = doc['_id']
-                updates, removals = self._delta()
-                # Need to add shard key to query, or you get an error
-                if save_condition is not None:
-                    select_dict = transform.query(self.__class__,
-                                                  **save_condition)
-                else:
-                    select_dict = {}
-                select_dict['_id'] = object_id
-                shard_key = self._meta.get('shard_key', tuple())
-                for k in shard_key:
-                    path = self._lookup_field(k.split('.'))
-                    actual_key = [p.db_field for p in path]
-                    val = doc
-                    for ak in actual_key:
-                        val = val[ak]
-                    select_dict['.'.join(actual_key)] = val
-
-                def is_new_object(last_error):
-                    if last_error is not None:
-                        updated = last_error.get('updatedExisting')
-                        if updated is not None:
-                            return not updated
-                    return created
-
-                update_query = {}
-
-                if updates:
-                    update_query['$set'] = updates
-                if removals:
-                    update_query['$unset'] = removals
-                if updates or removals:
-                    upsert = save_condition is None
-                    last_error = collection.update(select_dict, update_query,
-                                                   upsert=upsert, **write_concern)
-                    if not upsert and last_error['n'] == 0:
-                        raise SaveConditionError('Race condition preventing'
-                                                 ' document update detected')
-                    created = is_new_object(last_error)
+                object_id, created = self._save_update(doc, save_condition,
+                                                       write_concern)
 
             if cascade is None:
-                cascade = self._meta.get(
-                    'cascade', False) or cascade_kwargs is not None
+                cascade = (self._meta.get('cascade', False) or
+                           cascade_kwargs is not None)
 
             if cascade:
                 kwargs = {
@@ -403,6 +391,7 @@ class Document(BaseDocument):
                     kwargs.update(cascade_kwargs)
                 kwargs['_refs'] = _refs
                 self.cascade_save(**kwargs)
+
         except pymongo.errors.DuplicateKeyError as err:
             message = u'Tried to save duplicate unique keys (%s)'
             raise NotUniqueError(message % six.text_type(err))
@@ -415,16 +404,101 @@ class Document(BaseDocument):
                 raise NotUniqueError(message % six.text_type(err))
             raise OperationError(message % six.text_type(err))
 
+        # Make sure we store the PK on this document now that it's saved
         id_field = self._meta['id_field']
         if created or id_field not in self._meta.get('shard_key', []):
             self[id_field] = self._fields[id_field].to_python(object_id)
 
         signals.post_save.send(self.__class__, document=self,
                                created=created, **signal_kwargs)
+
         self._clear_changed_fields()
         self._created = False
+
         return self
 
+    def _save_create(self, doc, force_insert, write_concern):
+        """Save a new document.
+
+        Helper method, should only be used inside save().
+        """
+        collection = self._get_collection()
+
+        if force_insert:
+            return collection.insert(doc, **write_concern)
+
+        object_id = collection.save(doc, **write_concern)
+
+        # In PyMongo 3.0, the save() call calls internally the _update() call
+        # but they forget to return the _id value passed back, therefore getting it back here
+        # Correct behaviour in 2.X and in 3.0.1+ versions
+        if not object_id and pymongo.version_tuple == (3, 0):
+            pk_as_mongo_obj = self._fields.get(self._meta['id_field']).to_mongo(self.pk)
+            object_id = (
+                self._qs.filter(pk=pk_as_mongo_obj).first() and
+                self._qs.filter(pk=pk_as_mongo_obj).first().pk
+            )  # TODO doesn't this make 2 queries?
+
+        return object_id
+
+    def _get_update_doc(self):
+        """Return a dict containing all the $set and $unset operations
+        that should be sent to MongoDB based on the changes made to this
+        Document.
+        """
+        updates, removals = self._delta()
+
+        update_doc = {}
+        if updates:
+            update_doc['$set'] = updates
+        if removals:
+            update_doc['$unset'] = removals
+
+        return update_doc
+
+    def _save_update(self, doc, save_condition, write_concern):
+        """Update an existing document.
+
+        Helper method, should only be used inside save().
+        """
+        collection = self._get_collection()
+        object_id = doc['_id']
+        created = False
+
+        select_dict = {}
+        if save_condition is not None:
+            select_dict = transform.query(self.__class__, **save_condition)
+
+        select_dict['_id'] = object_id
+
+        # Need to add shard key to query, or you get an error
+        shard_key = self._meta.get('shard_key', tuple())
+        for k in shard_key:
+            path = self._lookup_field(k.split('.'))
+            actual_key = [p.db_field for p in path]
+            val = doc
+            for ak in actual_key:
+                val = val[ak]
+            select_dict['.'.join(actual_key)] = val
+
+        update_doc = self._get_update_doc()
+        if update_doc:
+            upsert = save_condition is None
+            last_error = collection.update(select_dict, update_doc,
+                                           upsert=upsert, **write_concern)
+            if not upsert and last_error['n'] == 0:
+                raise SaveConditionError('Race condition preventing'
+                                         ' document update detected')
+            if last_error is not None:
+                updated_existing = last_error.get('updatedExisting')
+                if updated_existing is False:
+                    created = True
+                    # !!! This is bad, means we accidentally created a new,
+                    # potentially corrupted document. See
+                    # https://github.com/MongoEngine/mongoengine/issues/564
+
+        return object_id, created
+
     def cascade_save(self, **kwargs):
         """Recursively save any references and generic references on the
         document.
@@ -828,7 +902,6 @@ class Document(BaseDocument):
         """ Lists all of the indexes that should be created for given
         collection. It includes all the indexes from super- and sub-classes.
         """
-
         if cls._meta.get('abstract'):
             return []
 

mongoengine/errors.py

@@ -50,8 +50,8 @@ class FieldDoesNotExist(Exception):
     or an :class:`~mongoengine.EmbeddedDocument`.
 
     To avoid this behavior on data loading,
-    you should the :attr:`strict` to ``False``
-    in the :attr:`meta` dictionnary.
+    you should set the :attr:`strict` to ``False``
+    in the :attr:`meta` dictionary.
     """
 
 

mongoengine/fields.py

@@ -2,6 +2,7 @@ import datetime
 import decimal
 import itertools
 import re
+import socket
 import time
 import uuid
 import warnings
@@ -28,7 +29,7 @@ from mongoengine.base import (BaseDocument, BaseField, ComplexBaseField,
                               GeoJsonBaseField, ObjectIdField, get_document)
 from mongoengine.connection import DEFAULT_CONNECTION_NAME, get_db
 from mongoengine.document import Document, EmbeddedDocument
-from mongoengine.errors import DoesNotExist, ValidationError
+from mongoengine.errors import DoesNotExist, InvalidQueryError, ValidationError
 from mongoengine.python_support import StringIO
 from mongoengine.queryset import DO_NOTHING, QuerySet
 
@@ -139,12 +140,12 @@ class URLField(StringField):
         # Check first if the scheme is valid
         scheme = value.split('://')[0].lower()
         if scheme not in self.schemes:
-            self.error('Invalid scheme {} in URL: {}'.format(scheme, value))
+            self.error(u'Invalid scheme {} in URL: {}'.format(scheme, value))
             return
 
         # Then check full URL
         if not self.url_regex.match(value):
-            self.error('Invalid URL: {}'.format(value))
+            self.error(u'Invalid URL: {}'.format(value))
             return
 
 
@@ -153,21 +154,105 @@ class EmailField(StringField):
 
     .. versionadded:: 0.4
     """
-
-    EMAIL_REGEX = re.compile(
-        # dot-atom
-        r"(^[-!#$%&'*+/=?^_`{}|~0-9A-Z]+(\.[-!#$%&'*+/=?^_`{}|~0-9A-Z]+)*"
-        # quoted-string
-        r'|^"([\001-\010\013\014\016-\037!#-\[\]-\177]|\\[\001-011\013\014\016-\177])*"'
-        # domain (max length of an ICAAN TLD is 22 characters)
-        r')@(?:[A-Z0-9](?:[A-Z0-9-]{0,61}[A-Z0-9])?\.)+(?:[A-Z]{2,6}|[A-Z0-9-]{2,}(?<!-))$', re.IGNORECASE
+    USER_REGEX = re.compile(
+        # `dot-atom` defined in RFC 5322 Section 3.2.3.
+        r"(^[-!#$%&'*+/=?^_`{}|~0-9A-Z]+(\.[-!#$%&'*+/=?^_`{}|~0-9A-Z]+)*\Z"
+        # `quoted-string` defined in RFC 5322 Section 3.2.4.
+        r'|^"([\001-\010\013\014\016-\037!#-\[\]-\177]|\\[\001-\011\013\014\016-\177])*"\Z)',
+        re.IGNORECASE
     )
 
+    UTF8_USER_REGEX = re.compile(
+        six.u(
+            # RFC 6531 Section 3.3 extends `atext` (used by dot-atom) to
+            # include `UTF8-non-ascii`.
+            r"(^[-!#$%&'*+/=?^_`{}|~0-9A-Z\u0080-\U0010FFFF]+(\.[-!#$%&'*+/=?^_`{}|~0-9A-Z\u0080-\U0010FFFF]+)*\Z"
+            # `quoted-string`
+            r'|^"([\001-\010\013\014\016-\037!#-\[\]-\177]|\\[\001-\011\013\014\016-\177])*"\Z)'
+        ), re.IGNORECASE | re.UNICODE
+    )
+
+    DOMAIN_REGEX = re.compile(
+        r'((?:[A-Z0-9](?:[A-Z0-9-]{0,61}[A-Z0-9])?\.)+)(?:[A-Z0-9-]{2,63}(?<!-))\Z',
+        re.IGNORECASE
+    )
+
+    error_msg = u'Invalid email address: %s'
+
+    def __init__(self, domain_whitelist=None, allow_utf8_user=False,
+                 allow_ip_domain=False, *args, **kwargs):
+        """Initialize the EmailField.
+
+        Args:
+            domain_whitelist (list) - list of otherwise invalid domain
+                                      names which you'd like to support.
+            allow_utf8_user (bool) - if True, the user part of the email
+                                     address can contain UTF8 characters.
+                                     False by default.
+            allow_ip_domain (bool) - if True, the domain part of the email
+                                     can be a valid IPv4 or IPv6 address.
+        """
+        self.domain_whitelist = domain_whitelist or []
+        self.allow_utf8_user = allow_utf8_user
+        self.allow_ip_domain = allow_ip_domain
+        super(EmailField, self).__init__(*args, **kwargs)
+
+    def validate_user_part(self, user_part):
+        """Validate the user part of the email address. Return True if
+        valid and False otherwise.
+        """
+        if self.allow_utf8_user:
+            return self.UTF8_USER_REGEX.match(user_part)
+        return self.USER_REGEX.match(user_part)
+
+    def validate_domain_part(self, domain_part):
+        """Validate the domain part of the email address. Return True if
+        valid and False otherwise.
+        """
+        # Skip domain validation if it's in the whitelist.
+        if domain_part in self.domain_whitelist:
+            return True
+
+        if self.DOMAIN_REGEX.match(domain_part):
+            return True
+
+        # Validate IPv4/IPv6, e.g. user@[192.168.0.1]
+        if (
+            self.allow_ip_domain and
+            domain_part[0] == '[' and
+            domain_part[-1] == ']'
+        ):
+            for addr_family in (socket.AF_INET, socket.AF_INET6):
+                try:
+                    socket.inet_pton(addr_family, domain_part[1:-1])
+                    return True
+                except (socket.error, UnicodeEncodeError):
+                    pass
+
+        return False
+
     def validate(self, value):
-        if not EmailField.EMAIL_REGEX.match(value):
-            self.error('Invalid email address: %s' % value)
         super(EmailField, self).validate(value)
 
+        if '@' not in value:
+            self.error(self.error_msg % value)
+
+        user_part, domain_part = value.rsplit('@', 1)
+
+        # Validate the user part.
+        if not self.validate_user_part(user_part):
+            self.error(self.error_msg % value)
+
+        # Validate the domain and, if invalid, see if it's IDN-encoded.
+        if not self.validate_domain_part(domain_part):
+            try:
+                domain_part = domain_part.encode('idna').decode('ascii')
+            except UnicodeError:
+                self.error(self.error_msg % value)
+            else:
+                if not self.validate_domain_part(domain_part):
+                    self.error(self.error_msg % value)
+
 
 class IntField(BaseField):
     """32-bit integer field."""
@@ -398,6 +483,10 @@ class DateTimeField(BaseField):
         if not isinstance(value, six.string_types):
             return None
 
+        value = value.strip()
+        if not value:
+            return None
+
         # Attempt to parse a datetime:
         if dateutil:
             try:
@@ -522,9 +611,9 @@ class EmbeddedDocumentField(BaseField):
     """
 
     def __init__(self, document_type, **kwargs):
-        if (
-            not isinstance(document_type, six.string_types) and
-            not issubclass(document_type, EmbeddedDocument)
+        if not (
+            isinstance(document_type, six.string_types) or
+            issubclass(document_type, EmbeddedDocument)
         ):
             self.error('Invalid embedded document class provided to an '
                        'EmbeddedDocumentField')
@@ -566,7 +655,11 @@ class EmbeddedDocumentField(BaseField):
 
     def prepare_query_value(self, op, value):
         if value is not None and not isinstance(value, self.document_type):
-            value = self.document_type._from_son(value)
+            try:
+                value = self.document_type._from_son(value)
+            except ValueError:
+                raise InvalidQueryError("Querying the embedded document '%s' failed, due to an invalid query value" %
+                                        (self.document_type._class_name,))
         super(EmbeddedDocumentField, self).prepare_query_value(op, value)
         return self.to_mongo(value)
 
@@ -884,10 +977,6 @@ class ReferenceField(BaseField):
 
         Foo.register_delete_rule(Bar, 'foo', NULLIFY)
 
-    .. note ::
-        `reverse_delete_rule` does not trigger pre / post delete signals to be
-        triggered.
-
     .. versionchanged:: 0.5 added `reverse_delete_rule`
     """
 
@@ -998,8 +1087,8 @@ class ReferenceField(BaseField):
 
     def validate(self, value):
 
-        if not isinstance(value, (self.document_type, DBRef)):
-            self.error('A ReferenceField only accepts DBRef or documents')
+        if not isinstance(value, (self.document_type, DBRef, ObjectId)):
+            self.error('A ReferenceField only accepts DBRef, ObjectId or documents')
 
         if isinstance(value, Document) and value.id is None:
             self.error('You can only reference documents once they have been '
@@ -1376,6 +1465,9 @@ class GridFSProxy(object):
         else:
             return False
 
+    def __ne__(self, other):
+        return not self == other
+
     @property
     def fs(self):
         if not self._fs:

mongoengine/queryset/base.py

@@ -67,7 +67,6 @@ class BaseQuerySet(object):
         self._scalar = []
         self._none = False
         self._as_pymongo = False
-        self._as_pymongo_coerce = False
         self._search_text = None
 
         # If inheritance is allowed, only return instances and instances of
@@ -86,6 +85,7 @@ class BaseQuerySet(object):
         self._batch_size = None
         self.only_fields = []
         self._max_time_ms = None
+        self._comment = None
 
     def __call__(self, q_obj=None, class_check=True, read_preference=None,
                  **query):
@@ -157,44 +157,49 @@ class BaseQuerySet(object):
         # self._cursor
 
     def __getitem__(self, key):
-        """Support skip and limit using getitem and slicing syntax."""
+        """Return a document instance corresponding to a given index if
+        the key is an integer. If the key is a slice, translate its
+        bounds into a skip and a limit, and return a cloned queryset
+        with that skip/limit applied. For example:
+
+        >>> User.objects[0]
+        <User: User object>
+        >>> User.objects[1:3]
+        [<User: User object>, <User: User object>]
+        """
         queryset = self.clone()
 
-        # Slice provided
+        # Handle a slice
         if isinstance(key, slice):
-            try:
-                queryset._cursor_obj = queryset._cursor[key]
-                queryset._skip, queryset._limit = key.start, key.stop
-                if key.start and key.stop:
-                    queryset._limit = key.stop - key.start
-            except IndexError as err:
-                # PyMongo raises an error if key.start == key.stop, catch it,
-                # bin it, kill it.
-                start = key.start or 0
-                if start >= 0 and key.stop >= 0 and key.step is None:
-                    if start == key.stop:
-                        queryset.limit(0)
-                        queryset._skip = key.start
-                        queryset._limit = key.stop - start
-                        return queryset
-                raise err
+            queryset._cursor_obj = queryset._cursor[key]
+            queryset._skip, queryset._limit = key.start, key.stop
+            if key.start and key.stop:
+                queryset._limit = key.stop - key.start
+
             # Allow further QuerySet modifications to be performed
             return queryset
-        # Integer index provided
+
+        # Handle an index
         elif isinstance(key, int):
             if queryset._scalar:
                 return queryset._get_scalar(
-                    queryset._document._from_son(queryset._cursor[key],
-                                                 _auto_dereference=self._auto_dereference,
-                                                 only_fields=self.only_fields))
+                    queryset._document._from_son(
+                        queryset._cursor[key],
+                        _auto_dereference=self._auto_dereference,
+                        only_fields=self.only_fields
+                    )
+                )
 
             if queryset._as_pymongo:
                 return queryset._get_as_pymongo(queryset._cursor[key])
-            return queryset._document._from_son(queryset._cursor[key],
-                                                _auto_dereference=self._auto_dereference,
-                                                only_fields=self.only_fields)
 
-        raise AttributeError
+            return queryset._document._from_son(
+                queryset._cursor[key],
+                _auto_dereference=self._auto_dereference,
+                only_fields=self.only_fields
+            )
+
+        raise AttributeError('Provide a slice or an integer index')
 
     def __iter__(self):
         raise NotImplementedError
@@ -285,7 +290,7 @@ class BaseQuerySet(object):
 
         .. versionadded:: 0.4
         """
-        return self._document(**kwargs).save()
+        return self._document(**kwargs).save(force_insert=True)
 
     def first(self):
         """Retrieve the first object matching the query."""
@@ -706,39 +711,37 @@ class BaseQuerySet(object):
         with switch_db(self._document, alias) as cls:
             collection = cls._get_collection()
 
-        return self.clone_into(self.__class__(self._document, collection))
+        return self._clone_into(self.__class__(self._document, collection))
 
     def clone(self):
-        """Creates a copy of the current
-          :class:`~mongoengine.queryset.QuerySet`
+        """Create a copy of the current queryset."""
+        return self._clone_into(self.__class__(self._document, self._collection_obj))
 
-        .. versionadded:: 0.5
+    def _clone_into(self, new_qs):
+        """Copy all of the relevant properties of this queryset to
+        a new queryset (which has to be an instance of
+        :class:`~mongoengine.queryset.base.BaseQuerySet`).
         """
-        return self.clone_into(self.__class__(self._document, self._collection_obj))
-
-    def clone_into(self, cls):
-        """Creates a copy of the current
-          :class:`~mongoengine.queryset.base.BaseQuerySet` into another child class
-        """
-        if not isinstance(cls, BaseQuerySet):
+        if not isinstance(new_qs, BaseQuerySet):
             raise OperationError(
-                '%s is not a subclass of BaseQuerySet' % cls.__name__)
+                '%s is not a subclass of BaseQuerySet' % new_qs.__name__)
 
         copy_props = ('_mongo_query', '_initial_query', '_none', '_query_obj',
-                      '_where_clause', '_loaded_fields', '_ordering', '_snapshot',
-                      '_timeout', '_class_check', '_slave_okay', '_read_preference',
-                      '_iter', '_scalar', '_as_pymongo', '_as_pymongo_coerce',
+                      '_where_clause', '_loaded_fields', '_ordering',
+                      '_snapshot', '_timeout', '_class_check', '_slave_okay',
+                      '_read_preference', '_iter', '_scalar', '_as_pymongo',
                       '_limit', '_skip', '_hint', '_auto_dereference',
-                      '_search_text', 'only_fields', '_max_time_ms')
+                      '_search_text', 'only_fields', '_max_time_ms',
+                      '_comment')
 
         for prop in copy_props:
             val = getattr(self, prop)
-            setattr(cls, prop, copy.copy(val))
+            setattr(new_qs, prop, copy.copy(val))
 
         if self._cursor_obj:
-            cls._cursor_obj = self._cursor_obj.clone()
+            new_qs._cursor_obj = self._cursor_obj.clone()
 
-        return cls
+        return new_qs
 
     def select_related(self, max_depth=1):
         """Handles dereferencing of :class:`~bson.dbref.DBRef` objects or
@@ -760,7 +763,11 @@ class BaseQuerySet(object):
         """
         queryset = self.clone()
         queryset._limit = n if n != 0 else 1
-        # Return self to allow chaining
+
+        # If a cursor object has already been created, apply the limit to it.
+        if queryset._cursor_obj:
+            queryset._cursor_obj.limit(queryset._limit)
+
         return queryset
 
     def skip(self, n):
@@ -771,6 +778,11 @@ class BaseQuerySet(object):
         """
         queryset = self.clone()
         queryset._skip = n
+
+        # If a cursor object has already been created, apply the skip to it.
+        if queryset._cursor_obj:
+            queryset._cursor_obj.skip(queryset._skip)
+
         return queryset
 
     def hint(self, index=None):
@@ -788,6 +800,11 @@ class BaseQuerySet(object):
         """
         queryset = self.clone()
         queryset._hint = index
+
+        # If a cursor object has already been created, apply the hint to it.
+        if queryset._cursor_obj:
+            queryset._cursor_obj.hint(queryset._hint)
+
         return queryset
 
     def batch_size(self, size):
@@ -801,6 +818,11 @@ class BaseQuerySet(object):
         """
         queryset = self.clone()
         queryset._batch_size = size
+
+        # If a cursor object has already been created, apply the batch size to it.
+        if queryset._cursor_obj:
+            queryset._cursor_obj.batch_size(queryset._batch_size)
+
         return queryset
 
     def distinct(self, field):
@@ -900,18 +922,25 @@ class BaseQuerySet(object):
         return self.fields(**fields)
 
     def fields(self, _only_called=False, **kwargs):
-        """Manipulate how you load this document's fields.  Used by `.only()`
-        and `.exclude()` to manipulate which fields to retrieve.  Fields also
-        allows for a greater level of control for example:
+        """Manipulate how you load this document's fields. Used by `.only()`
+        and `.exclude()` to manipulate which fields to retrieve. If called
+        directly, use a set of kwargs similar to the MongoDB projection
+        document. For example:
 
-        Retrieving a Subrange of Array Elements:
+        Include only a subset of fields:
 
-        You can use the $slice operator to retrieve a subrange of elements in
-        an array. For example to get the first 5 comments::
+            posts = BlogPost.objects(...).fields(author=1, title=1)
 
-            post = BlogPost.objects(...).fields(slice__comments=5)
+        Exclude a specific field:
 
-        :param kwargs: A dictionary identifying what to include
+            posts = BlogPost.objects(...).fields(comments=0)
+
+        To retrieve a subrange of array elements:
+
+            posts = BlogPost.objects(...).fields(slice__comments=5)
+
+        :param kwargs: A set of keyword arguments identifying what to
+            include, exclude, or slice.
 
         .. versionadded:: 0.5
         """
@@ -927,7 +956,20 @@ class BaseQuerySet(object):
             key = '.'.join(parts)
             cleaned_fields.append((key, value))
 
-        fields = sorted(cleaned_fields, key=operator.itemgetter(1))
+        # Sort fields by their values, explicitly excluded fields first, then
+        # explicitly included, and then more complicated operators such as
+        # $slice.
+        def _sort_key(field_tuple):
+            key, value = field_tuple
+            if isinstance(value, (int)):
+                return value  # 0 for exclusion, 1 for inclusion
+            else:
+                return 2  # so that complex values appear last
+
+        fields = sorted(cleaned_fields, key=_sort_key)
+
+        # Clone the queryset, group all fields by their value, convert
+        # each of them to db_fields, and set the queryset's _loaded_fields
         queryset = self.clone()
         for value, group in itertools.groupby(fields, lambda x: x[1]):
             fields = [field for field, value in group]
@@ -953,13 +995,31 @@ class BaseQuerySet(object):
     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.
+        Ascending order is assumed. If no keys are passed, existing ordering
+        is cleared instead.
 
         :param keys: fields to order the query results by; keys may be
             prefixed with **+** or **-** to determine the ordering direction
         """
         queryset = self.clone()
-        queryset._ordering = queryset._get_order_by(keys)
+
+        old_ordering = queryset._ordering
+        new_ordering = queryset._get_order_by(keys)
+
+        if queryset._cursor_obj:
+
+            # If a cursor object has already been created, apply the sort to it
+            if new_ordering:
+                queryset._cursor_obj.sort(new_ordering)
+
+            # If we're trying to clear a previous explicit ordering, we need
+            # to clear the cursor entirely (because PyMongo doesn't allow
+            # clearing an existing sort on a cursor).
+            elif old_ordering:
+                queryset._cursor_obj = None
+
+        queryset._ordering = new_ordering
+
         return queryset
 
     def comment(self, text):
@@ -1069,16 +1129,15 @@ class BaseQuerySet(object):
         """An alias for scalar"""
         return self.scalar(*fields)
 
-    def as_pymongo(self, coerce_types=False):
+    def as_pymongo(self):
         """Instead of returning Document instances, return raw values from
         pymongo.
 
-        :param coerce_types: Field types (if applicable) would be use to
-            coerce types.
+        This method is particularly useful if you don't need dereferencing
+        and care primarily about the speed of data retrieval.
         """
         queryset = self.clone()
         queryset._as_pymongo = True
-        queryset._as_pymongo_coerce = coerce_types
         return queryset
 
     def max_time_ms(self, ms):
@@ -1405,10 +1464,13 @@ class BaseQuerySet(object):
             raise StopIteration
 
         raw_doc = self._cursor.next()
+
         if self._as_pymongo:
             return self._get_as_pymongo(raw_doc)
-        doc = self._document._from_son(raw_doc,
-                                       _auto_dereference=self._auto_dereference, only_fields=self.only_fields)
+
+        doc = self._document._from_son(
+            raw_doc, _auto_dereference=self._auto_dereference,
+            only_fields=self.only_fields)
 
         if self._scalar:
             return self._get_scalar(doc)
@@ -1418,7 +1480,6 @@ class BaseQuerySet(object):
     def rewind(self):
         """Rewind the cursor to its unevaluated state.
 
-
         .. versionadded:: 0.3
         """
         self._iter = False
@@ -1468,43 +1529,54 @@ class BaseQuerySet(object):
 
     @property
     def _cursor(self):
-        if self._cursor_obj is None:
+        """Return a PyMongo cursor object corresponding to this queryset."""
 
-            # In PyMongo 3+, we define the read preference on a collection
-            # level, not a cursor level. Thus, we need to get a cloned
-            # collection object using `with_options` first.
-            if IS_PYMONGO_3 and self._read_preference is not None:
-                self._cursor_obj = self._collection\
-                    .with_options(read_preference=self._read_preference)\
-                    .find(self._query, **self._cursor_args)
-            else:
-                self._cursor_obj = self._collection.find(self._query,
-                                                         **self._cursor_args)
-            # Apply where clauses to cursor
-            if self._where_clause:
-                where_clause = self._sub_js_fields(self._where_clause)
-                self._cursor_obj.where(where_clause)
+        # If _cursor_obj already exists, return it immediately.
+        if self._cursor_obj is not None:
+            return self._cursor_obj
 
-            if self._ordering:
-                # Apply query ordering
-                self._cursor_obj.sort(self._ordering)
-            elif self._ordering is None and self._document._meta['ordering']:
-                # Otherwise, apply the ordering from the document model, unless
-                # it's been explicitly cleared via order_by with no arguments
-                order = self._get_order_by(self._document._meta['ordering'])
-                self._cursor_obj.sort(order)
+        # Create a new PyMongo cursor.
+        # XXX In PyMongo 3+, we define the read preference on a collection
+        # level, not a cursor level. Thus, we need to get a cloned collection
+        # object using `with_options` first.
+        if IS_PYMONGO_3 and self._read_preference is not None:
+            self._cursor_obj = self._collection\
+                .with_options(read_preference=self._read_preference)\
+                .find(self._query, **self._cursor_args)
+        else:
+            self._cursor_obj = self._collection.find(self._query,
+                                                     **self._cursor_args)
+        # Apply "where" clauses to cursor
+        if self._where_clause:
+            where_clause = self._sub_js_fields(self._where_clause)
+            self._cursor_obj.where(where_clause)
 
-            if self._limit is not None:
-                self._cursor_obj.limit(self._limit)
+        # Apply ordering to the cursor.
+        # XXX self._ordering can be equal to:
+        # * None if we didn't explicitly call order_by on this queryset.
+        # * A list of PyMongo-style sorting tuples.
+        # * An empty list if we explicitly called order_by() without any
+        #   arguments. This indicates that we want to clear the default
+        #   ordering.
+        if self._ordering:
+            # explicit ordering
+            self._cursor_obj.sort(self._ordering)
+        elif self._ordering is None and self._document._meta['ordering']:
+            # default ordering
+            order = self._get_order_by(self._document._meta['ordering'])
+            self._cursor_obj.sort(order)
 
-            if self._skip is not None:
-                self._cursor_obj.skip(self._skip)
+        if self._limit is not None:
+            self._cursor_obj.limit(self._limit)
 
-            if self._hint != -1:
-                self._cursor_obj.hint(self._hint)
+        if self._skip is not None:
+            self._cursor_obj.skip(self._skip)
 
-            if self._batch_size is not None:
-                self._cursor_obj.batch_size(self._batch_size)
+        if self._hint != -1:
+            self._cursor_obj.hint(self._hint)
+
+        if self._batch_size is not None:
+            self._cursor_obj.batch_size(self._batch_size)
 
         return self._cursor_obj
 
@@ -1650,25 +1722,33 @@ class BaseQuerySet(object):
         return frequencies
 
     def _fields_to_dbfields(self, fields):
-        """Translate fields paths to its db equivalents"""
-        ret = []
+        """Translate fields' paths to their db equivalents."""
         subclasses = []
-        document = self._document
-        if document._meta['allow_inheritance']:
+        if self._document._meta['allow_inheritance']:
             subclasses = [get_document(x)
-                          for x in document._subclasses][1:]
+                          for x in self._document._subclasses][1:]
+
+        db_field_paths = []
         for field in fields:
+            field_parts = field.split('.')
             try:
-                field = '.'.join(f.db_field for f in
-                                 document._lookup_field(field.split('.')))
-                ret.append(field)
+                field = '.'.join(
+                    f if isinstance(f, six.string_types) else f.db_field
+                    for f in self._document._lookup_field(field_parts)
+                )
+                db_field_paths.append(field)
             except LookUpError as err:
                 found = False
+
+                # If a field path wasn't found on the main document, go
+                # through its subclasses and see if it exists on any of them.
                 for subdoc in subclasses:
                     try:
-                        subfield = '.'.join(f.db_field for f in
-                                            subdoc._lookup_field(field.split('.')))
-                        ret.append(subfield)
+                        subfield = '.'.join(
+                            f if isinstance(f, six.string_types) else f.db_field
+                            for f in subdoc._lookup_field(field_parts)
+                        )
+                        db_field_paths.append(subfield)
                         found = True
                         break
                     except LookUpError:
@@ -1676,10 +1756,17 @@ class BaseQuerySet(object):
 
                 if not found:
                     raise err
-        return ret
+
+        return db_field_paths
 
     def _get_order_by(self, keys):
-        """Creates a list of order by fields"""
+        """Given a list of MongoEngine-style sort keys, return a list
+        of sorting tuples that can be applied to a PyMongo cursor. For
+        example:
+
+        >>> qs._get_order_by(['-last_name', 'first_name'])
+        [('last_name', -1), ('first_name', 1)]
+        """
         key_list = []
         for key in keys:
             if not key:
@@ -1692,17 +1779,19 @@ class BaseQuerySet(object):
             direction = pymongo.ASCENDING
             if key[0] == '-':
                 direction = pymongo.DESCENDING
+
             if key[0] in ('-', '+'):
                 key = key[1:]
+
             key = key.replace('__', '.')
             try:
                 key = self._document._translate_field_name(key)
             except Exception:
+                # TODO this exception should be more specific
                 pass
+
             key_list.append((key, direction))
 
-        if self._cursor_obj and key_list:
-            self._cursor_obj.sort(key_list)
         return key_list
 
     def _get_scalar(self, doc):
@@ -1719,59 +1808,25 @@ class BaseQuerySet(object):
 
         return tuple(data)
 
-    def _get_as_pymongo(self, row):
-        # Extract which fields paths we should follow if .fields(...) was
-        # used. If not, handle all fields.
-        if not getattr(self, '__as_pymongo_fields', None):
-            self.__as_pymongo_fields = []
+    def _get_as_pymongo(self, doc):
+        """Clean up a PyMongo doc, removing fields that were only fetched
+        for the sake of MongoEngine's implementation, and return it.
+        """
+        # Always remove _cls as a MongoEngine's implementation detail.
+        if '_cls' in doc:
+            del doc['_cls']
 
-            for field in self._loaded_fields.fields - set(['_cls']):
-                self.__as_pymongo_fields.append(field)
-                while '.' in field:
-                    field, _ = field.rsplit('.', 1)
-                    self.__as_pymongo_fields.append(field)
+        # If the _id was not included in a .only or was excluded in a .exclude,
+        # remove it from the doc (we always fetch it so that we can properly
+        # construct documents).
+        fields = self._loaded_fields
+        if fields and '_id' in doc and (
+            (fields.value == QueryFieldList.ONLY and '_id' not in fields.fields) or
+            (fields.value == QueryFieldList.EXCLUDE and '_id' in fields.fields)
+        ):
+            del doc['_id']
 
-        all_fields = not self.__as_pymongo_fields
-
-        def clean(data, path=None):
-            path = path or ''
-
-            if isinstance(data, dict):
-                new_data = {}
-                for key, value in data.iteritems():
-                    new_path = '%s.%s' % (path, key) if path else key
-
-                    if all_fields:
-                        include_field = True
-                    elif self._loaded_fields.value == QueryFieldList.ONLY:
-                        include_field = new_path in self.__as_pymongo_fields
-                    else:
-                        include_field = new_path not in self.__as_pymongo_fields
-
-                    if include_field:
-                        new_data[key] = clean(value, path=new_path)
-                data = new_data
-            elif isinstance(data, list):
-                data = [clean(d, path=path) for d in data]
-            else:
-                if self._as_pymongo_coerce:
-                    # If we need to coerce types, we need to determine the
-                    # type of this field and use the corresponding
-                    # .to_python(...)
-                    EmbeddedDocumentField = _import_class('EmbeddedDocumentField')
-
-                    obj = self._document
-                    for chunk in path.split('.'):
-                        obj = getattr(obj, chunk, None)
-                        if obj is None:
-                            break
-                        elif isinstance(obj, EmbeddedDocumentField):
-                            obj = obj.document_type
-                    if obj and data is not None:
-                        data = obj.to_python(data)
-            return data
-
-        return clean(row)
+        return doc
 
     def _sub_js_fields(self, code):
         """When fields are specified with [~fieldname] syntax, where
@@ -1800,10 +1855,21 @@ class BaseQuerySet(object):
         return code
 
     def _chainable_method(self, method_name, val):
+        """Call a particular method on the PyMongo cursor call a particular chainable method
+        with the provided value.
+        """
         queryset = self.clone()
-        method = getattr(queryset._cursor, method_name)
-        method(val)
+
+        # Get an existing cursor object or create a new one
+        cursor = queryset._cursor
+
+        # Find the requested method on the cursor and call it with the
+        # provided value
+        getattr(cursor, method_name)(val)
+
+        # Cache the value on the queryset._{method_name}
         setattr(queryset, '_' + method_name, val)
+
         return queryset
 
     # Deprecated

mongoengine/queryset/queryset.py

@@ -1,3 +1,5 @@
+import six
+
 from mongoengine.errors import OperationError
 from mongoengine.queryset.base import (BaseQuerySet, CASCADE, DENY, DO_NOTHING,
                                        NULLIFY, PULL)
@@ -112,7 +114,7 @@ class QuerySet(BaseQuerySet):
         # Pull in ITER_CHUNK_SIZE docs from the database and store them in
         # the result cache.
         try:
-            for _ in xrange(ITER_CHUNK_SIZE):
+            for _ in six.moves.range(ITER_CHUNK_SIZE):
                 self._result_cache.append(self.next())
         except StopIteration:
             # Getting this exception means there are no more docs in the
@@ -136,13 +138,15 @@ class QuerySet(BaseQuerySet):
         return self._len
 
     def no_cache(self):
-        """Convert to a non_caching queryset
+        """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))
+
+        return self._clone_into(QuerySetNoCache(self._document,
+                                                self._collection))
 
 
 class QuerySetNoCache(BaseQuerySet):
@@ -153,7 +157,7 @@ class QuerySetNoCache(BaseQuerySet):
 
         .. versionadded:: 0.8.3 Convert to caching queryset
         """
-        return self.clone_into(QuerySet(self._document, self._collection))
+        return self._clone_into(QuerySet(self._document, self._collection))
 
     def __repr__(self):
         """Provides the string representation of the QuerySet
@@ -164,7 +168,7 @@ class QuerySetNoCache(BaseQuerySet):
             return '.. queryset mid-iteration ..'
 
         data = []
-        for _ in xrange(REPR_OUTPUT_SIZE + 1):
+        for _ in six.moves.range(REPR_OUTPUT_SIZE + 1):
             try:
                 data.append(self.next())
             except StopIteration:

mongoengine/queryset/transform.py

@@ -101,8 +101,21 @@ def query(_doc_cls=None, **kwargs):
                         value = value['_id']
 
             elif op in ('in', 'nin', 'all', 'near') and not isinstance(value, dict):
-                # 'in', 'nin' and 'all' require a list of values
-                value = [field.prepare_query_value(op, v) for v in value]
+                # 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:
@@ -220,8 +233,7 @@ def update(_doc_cls=None, **update):
                 # Support decrement by flipping a positive value's sign
                 # and using 'inc'
                 op = 'inc'
-                if value > 0:
-                    value = -value
+                value = -value
             elif op == 'add_to_set':
                 op = 'addToSet'
             elif op == 'set_on_insert':
@@ -272,7 +284,9 @@ def update(_doc_cls=None, **update):
             if isinstance(field, GeoJsonBaseField):
                 value = field.to_mongo(value)
 
-            if op in (None, 'set', 'push', 'pull'):
+            if op == 'push' and isinstance(value, (list, tuple, set)):
+                value = [field.prepare_query_value(op, v) for v in value]
+            elif op in (None, 'set', 'push', 'pull'):
                 if field.required or value is not None:
                     value = field.prepare_query_value(op, value)
             elif op in ('pushAll', 'pullAll'):
@@ -321,10 +335,22 @@ def update(_doc_cls=None, **update):
                 value = {key: value}
         elif op == 'addToSet' and isinstance(value, list):
             value = {key: {'$each': value}}
+        elif op == 'push':
+            if parts[-1].isdigit():
+                key = parts[0]
+                position = int(parts[-1])
+                # $position expects an iterable. If pushing a single value,
+                # wrap it in a list.
+                if not isinstance(value, (set, tuple, list)):
+                    value = [value]
+                value = {key: {'$each': value, '$position': position}}
+            elif isinstance(value, list):
+                value = {key: {'$each': value}}
+            else:
+                value = {key: value}
         else:
             value = {key: value}
         key = '$' + op
-
         if key not in mongo_update:
             mongo_update[key] = value
         elif key in mongo_update and isinstance(mongo_update[key], dict):

requirements.txt

@@ -3,3 +3,5 @@ pymongo>=2.7.1
 six==1.10.0
 flake8
 flake8-import-order
+Sphinx==1.5.5
+sphinx-rtd-theme==0.2.4

setup.cfg

@@ -7,5 +7,5 @@ cover-package=mongoengine
 [flake8]
 ignore=E501,F401,F403,F405,I201
 exclude=build,dist,docs,venv,venv3,.tox,.eggs,tests
-max-complexity=45
+max-complexity=47
 application-import-names=mongoengine,tests

tests/document/indexes.py

@@ -2,14 +2,14 @@
 import unittest
 import sys
 
-
-import pymongo
-
 from nose.plugins.skip import SkipTest
 from datetime import datetime
+import pymongo
 
 from mongoengine import *
-from mongoengine.connection import get_db, get_connection
+from mongoengine.connection import get_db
+
+from tests.utils import get_mongodb_version, needs_mongodb_v26
 
 __all__ = ("IndexesTest", )
 
@@ -412,7 +412,6 @@ class IndexesTest(unittest.TestCase):
         User.ensure_indexes()
         info = User.objects._collection.index_information()
         self.assertEqual(sorted(info.keys()), ['_cls_1_user_guid_1', '_id_'])
-        User.drop_collection()
 
     def test_embedded_document_index(self):
         """Tests settings an index on an embedded document
@@ -434,7 +433,6 @@ class IndexesTest(unittest.TestCase):
 
         info = BlogPost.objects._collection.index_information()
         self.assertEqual(sorted(info.keys()), ['_id_', 'date.yr_-1'])
-        BlogPost.drop_collection()
 
     def test_list_embedded_document_index(self):
         """Ensure list embedded documents can be indexed
@@ -461,7 +459,6 @@ class IndexesTest(unittest.TestCase):
         post1 = BlogPost(title="Embedded Indexes tests in place",
                          tags=[Tag(name="about"), Tag(name="time")])
         post1.save()
-        BlogPost.drop_collection()
 
     def test_recursive_embedded_objects_dont_break_indexes(self):
 
@@ -494,8 +491,7 @@ class IndexesTest(unittest.TestCase):
         obj = Test(a=1)
         obj.save()
 
-        connection = get_connection()
-        IS_MONGODB_3 = connection.server_info()['versionArray'][0] >= 3
+        IS_MONGODB_3 = get_mongodb_version()[0] >= 3
 
         # Need to be explicit about covered indexes as mongoDB doesn't know if
         # the documents returned might have more keys in that here.
@@ -623,8 +619,6 @@ class IndexesTest(unittest.TestCase):
         post3 = BlogPost(title='test3', date=Date(year=2010), slug='test')
         self.assertRaises(OperationError, post3.save)
 
-        BlogPost.drop_collection()
-
     def test_unique_embedded_document(self):
         """Ensure that uniqueness constraints are applied to fields on embedded documents.
         """
@@ -652,8 +646,6 @@ class IndexesTest(unittest.TestCase):
                          sub=SubDocument(year=2010, slug='test'))
         self.assertRaises(NotUniqueError, post3.save)
 
-        BlogPost.drop_collection()
-
     def test_unique_embedded_document_in_list(self):
         """
         Ensure that the uniqueness constraints are applied to fields in
@@ -684,8 +676,6 @@ class IndexesTest(unittest.TestCase):
 
         self.assertRaises(NotUniqueError, post2.save)
 
-        BlogPost.drop_collection()
-
     def test_unique_with_embedded_document_and_embedded_unique(self):
         """Ensure that uniqueness constraints are applied to fields on
         embedded documents.  And work with unique_with as well.
@@ -719,8 +709,6 @@ class IndexesTest(unittest.TestCase):
                          sub=SubDocument(year=2009, slug='test-1'))
         self.assertRaises(NotUniqueError, post3.save)
 
-        BlogPost.drop_collection()
-
     def test_ttl_indexes(self):
 
         class Log(Document):
@@ -733,14 +721,6 @@ class IndexesTest(unittest.TestCase):
 
         Log.drop_collection()
 
-        if pymongo.version_tuple[0] < 2 and pymongo.version_tuple[1] < 3:
-            raise SkipTest('pymongo needs to be 2.3 or higher for this test')
-
-        connection = get_connection()
-        version_array = connection.server_info()['versionArray']
-        if version_array[0] < 2 and version_array[1] < 2:
-            raise SkipTest('MongoDB needs to be 2.2 or higher for this test')
-
         # Indexes are lazy so use list() to perform query
         list(Log.objects)
         info = Log.objects._collection.index_information()
@@ -768,13 +748,11 @@ class IndexesTest(unittest.TestCase):
             raise AssertionError("We saved a dupe!")
         except NotUniqueError:
             pass
-        Customer.drop_collection()
 
     def test_unique_and_primary(self):
         """If you set a field as primary, then unexpected behaviour can occur.
         You won't create a duplicate but you will update an existing document.
         """
-
         class User(Document):
             name = StringField(primary_key=True, unique=True)
             password = StringField()
@@ -790,8 +768,23 @@ class IndexesTest(unittest.TestCase):
         self.assertEqual(User.objects.count(), 1)
         self.assertEqual(User.objects.get().password, 'secret2')
 
+    def test_unique_and_primary_create(self):
+        """Create a new record with a duplicate primary key
+        throws an exception
+        """
+        class User(Document):
+            name = StringField(primary_key=True)
+            password = StringField()
+
         User.drop_collection()
 
+        User.objects.create(name='huangz', password='secret')
+        with self.assertRaises(NotUniqueError):
+            User.objects.create(name='huangz', password='secret2')
+
+        self.assertEqual(User.objects.count(), 1)
+        self.assertEqual(User.objects.get().password, 'secret')
+
     def test_index_with_pk(self):
         """Ensure you can use `pk` as part of a query"""
 
@@ -874,8 +867,8 @@ class IndexesTest(unittest.TestCase):
                          info['provider_ids.foo_1_provider_ids.bar_1']['key'])
         self.assertTrue(info['provider_ids.foo_1_provider_ids.bar_1']['sparse'])
 
+    @needs_mongodb_v26
     def test_text_indexes(self):
-
         class Book(Document):
             title = DictField()
             meta = {

tests/document/instance.py

@@ -22,14 +22,14 @@ from mongoengine.queryset import NULLIFY, Q
 from mongoengine.context_managers import switch_db, query_counter
 from mongoengine import signals
 
+from tests.utils import needs_mongodb_v26
+
 TEST_IMAGE_PATH = os.path.join(os.path.dirname(__file__),
                                '../fields/mongoengine.png')
 
 __all__ = ("InstanceTest",)
 
 
-
-
 class InstanceTest(unittest.TestCase):
 
     def setUp(self):
@@ -72,8 +72,7 @@ class InstanceTest(unittest.TestCase):
             self.assertEqual(field._instance, instance)
 
     def test_capped_collection(self):
-        """Ensure that capped collections work properly.
-        """
+        """Ensure that capped collections work properly."""
         class Log(Document):
             date = DateTimeField(default=datetime.now)
             meta = {
@@ -181,8 +180,7 @@ class InstanceTest(unittest.TestCase):
         self.assertEqual('<Article: привет мир>', repr(doc))
 
     def test_repr_none(self):
-        """Ensure None values handled correctly
-        """
+        """Ensure None values are handled correctly."""
         class Article(Document):
             title = StringField()
 
@@ -190,25 +188,23 @@ class InstanceTest(unittest.TestCase):
                 return None
 
         doc = Article(title=u'привет мир')
-
         self.assertEqual('<Article: None>', repr(doc))
 
     def test_queryset_resurrects_dropped_collection(self):
         self.Person.drop_collection()
-
         self.assertEqual([], list(self.Person.objects()))
 
+        # Ensure works correctly with inhertited classes
         class Actor(self.Person):
             pass
 
-        # Ensure works correctly with inhertited classes
         Actor.objects()
         self.Person.drop_collection()
         self.assertEqual([], list(Actor.objects()))
 
     def test_polymorphic_references(self):
-        """Ensure that the correct subclasses are returned from a query when
-        using references / generic references
+        """Ensure that the correct subclasses are returned from a query
+        when using references / generic references
         """
         class Animal(Document):
             meta = {'allow_inheritance': True}
@@ -248,7 +244,7 @@ class InstanceTest(unittest.TestCase):
         Zoo.drop_collection()
 
         class Zoo(Document):
-            animals = ListField(GenericReferenceField(Animal))
+            animals = ListField(GenericReferenceField())
 
         # Save a reference to each animal
         zoo = Zoo(animals=Animal.objects)
@@ -258,9 +254,6 @@ class InstanceTest(unittest.TestCase):
         classes = [a.__class__ for a in Zoo.objects.first().animals]
         self.assertEqual(classes, [Animal, Fish, Mammal, Dog, Human])
 
-        Zoo.drop_collection()
-        Animal.drop_collection()
-
     def test_reference_inheritance(self):
         class Stats(Document):
             created = DateTimeField(default=datetime.now)
@@ -287,8 +280,7 @@ class InstanceTest(unittest.TestCase):
         self.assertEqual(list_stats, CompareStats.objects.first().stats)
 
     def test_db_field_load(self):
-        """Ensure we load data correctly
-        """
+        """Ensure we load data correctly from the right db field."""
         class Person(Document):
             name = StringField(required=True)
             _rank = StringField(required=False, db_field="rank")
@@ -307,8 +299,7 @@ class InstanceTest(unittest.TestCase):
         self.assertEqual(Person.objects.get(name="Fred").rank, "Private")
 
     def test_db_embedded_doc_field_load(self):
-        """Ensure we load embedded document data correctly
-        """
+        """Ensure we load embedded document data correctly."""
         class Rank(EmbeddedDocument):
             title = StringField(required=True)
 
@@ -333,8 +324,7 @@ class InstanceTest(unittest.TestCase):
         self.assertEqual(Person.objects.get(name="Fred").rank, "Private")
 
     def test_custom_id_field(self):
-        """Ensure that documents may be created with custom primary keys.
-        """
+        """Ensure that documents may be created with custom primary keys."""
         class User(Document):
             username = StringField(primary_key=True)
             name = StringField()
@@ -382,10 +372,7 @@ class InstanceTest(unittest.TestCase):
         self.assertEqual(user_son['_id'], 'mongo')
         self.assertTrue('username' not in user_son['_id'])
 
-        User.drop_collection()
-
     def test_document_not_registered(self):
-
         class Place(Document):
             name = StringField()
 
@@ -407,7 +394,6 @@ class InstanceTest(unittest.TestCase):
             list(Place.objects.all())
 
     def test_document_registry_regressions(self):
-
         class Location(Document):
             name = StringField()
             meta = {'allow_inheritance': True}
@@ -421,23 +407,29 @@ class InstanceTest(unittest.TestCase):
         self.assertEqual(Area, get_document("Location.Area"))
 
     def test_creation(self):
-        """Ensure that document may be created using keyword arguments.
-        """
+        """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_to_dbref(self):
-        """Ensure that you can get a dbref of a document"""
+        """Ensure that you can get a dbref of a document."""
         person = self.Person(name="Test User", age=30)
         self.assertRaises(OperationError, person.to_dbref)
         person.save()
-
         person.to_dbref()
 
+    def test_save_abstract_document(self):
+        """Saving an abstract document should fail."""
+        class Doc(Document):
+            name = StringField()
+            meta = {'abstract': True}
+
+        with self.assertRaises(InvalidDocumentError):
+            Doc(name='aaa').save()
+
     def test_reload(self):
-        """Ensure that attributes may be reloaded.
-        """
+        """Ensure that attributes may be reloaded."""
         person = self.Person(name="Test User", age=20)
         person.save()
 
@@ -470,7 +462,6 @@ class InstanceTest(unittest.TestCase):
         doc = Animal(superphylum='Deuterostomia')
         doc.save()
         doc.reload()
-        Animal.drop_collection()
 
     def test_reload_sharded_nested(self):
         class SuperPhylum(EmbeddedDocument):
@@ -484,11 +475,9 @@ class InstanceTest(unittest.TestCase):
         doc = Animal(superphylum=SuperPhylum(name='Deuterostomia'))
         doc.save()
         doc.reload()
-        Animal.drop_collection()
 
     def test_reload_referencing(self):
-        """Ensures reloading updates weakrefs correctly
-        """
+        """Ensures reloading updates weakrefs correctly."""
         class Embedded(EmbeddedDocument):
             dict_field = DictField()
             list_field = ListField()
@@ -560,8 +549,7 @@ class InstanceTest(unittest.TestCase):
             self.assertFalse("Threw wrong exception")
 
     def test_reload_of_non_strict_with_special_field_name(self):
-        """Ensures reloading works for documents with meta strict == False
-        """
+        """Ensures reloading works for documents with meta strict == False."""
         class Post(Document):
             meta = {
                 'strict': False
@@ -582,8 +570,7 @@ class InstanceTest(unittest.TestCase):
         self.assertEqual(post.items, ["more lorem", "even more ipsum"])
 
     def test_dictionary_access(self):
-        """Ensure that dictionary-style field access works properly.
-        """
+        """Ensure that dictionary-style field access works properly."""
         person = self.Person(name='Test User', age=30, job=self.Job())
         self.assertEqual(person['name'], 'Test User')
 
@@ -625,8 +612,7 @@ class InstanceTest(unittest.TestCase):
         self.assertEqual(sub_doc.to_mongo().keys(), ['id'])
 
     def test_embedded_document(self):
-        """Ensure that embedded documents are set up correctly.
-        """
+        """Ensure that embedded documents are set up correctly."""
         class Comment(EmbeddedDocument):
             content = StringField()
 
@@ -634,8 +620,7 @@ class InstanceTest(unittest.TestCase):
         self.assertFalse('id' in Comment._fields)
 
     def test_embedded_document_instance(self):
-        """Ensure that embedded documents can reference parent instance
-        """
+        """Ensure that embedded documents can reference parent instance."""
         class Embedded(EmbeddedDocument):
             string = StringField()
 
@@ -643,6 +628,7 @@ class InstanceTest(unittest.TestCase):
             embedded_field = EmbeddedDocumentField(Embedded)
 
         Doc.drop_collection()
+
         doc = Doc(embedded_field=Embedded(string="Hi"))
         self.assertHasInstance(doc.embedded_field, doc)
 
@@ -652,7 +638,8 @@ class InstanceTest(unittest.TestCase):
 
     def test_embedded_document_complex_instance(self):
         """Ensure that embedded documents in complex fields can reference
-        parent instance"""
+        parent instance.
+        """
         class Embedded(EmbeddedDocument):
             string = StringField()
 
@@ -668,8 +655,7 @@ class InstanceTest(unittest.TestCase):
         self.assertHasInstance(doc.embedded_field[0], doc)
 
     def test_embedded_document_complex_instance_no_use_db_field(self):
-        """Ensure that use_db_field is propagated to list of Emb Docs
-        """
+        """Ensure that use_db_field is propagated to list of Emb Docs."""
         class Embedded(EmbeddedDocument):
             string = StringField(db_field='s')
 
@@ -681,7 +667,6 @@ class InstanceTest(unittest.TestCase):
         self.assertEqual(d['embedded_field'], [{'string': 'Hi'}])
 
     def test_instance_is_set_on_setattr(self):
-
         class Email(EmbeddedDocument):
             email = EmailField()
 
@@ -689,6 +674,7 @@ class InstanceTest(unittest.TestCase):
             email = EmbeddedDocumentField(Email)
 
         Account.drop_collection()
+
         acc = Account()
         acc.email = Email(email='test@example.com')
         self.assertHasInstance(acc._data["email"], acc)
@@ -698,7 +684,6 @@ class InstanceTest(unittest.TestCase):
         self.assertHasInstance(acc1._data["email"], acc1)
 
     def test_instance_is_set_on_setattr_on_embedded_document_list(self):
-
         class Email(EmbeddedDocument):
             email = EmailField()
 
@@ -843,33 +828,45 @@ class InstanceTest(unittest.TestCase):
 
         self.assertDbEqual([dict(other_doc.to_mongo()), dict(doc.to_mongo())])
 
+    @needs_mongodb_v26
+    def test_modify_with_positional_push(self):
+        class BlogPost(Document):
+            tags = ListField(StringField())
+
+        post = BlogPost.objects.create(tags=['python'])
+        self.assertEqual(post.tags, ['python'])
+        post.modify(push__tags__0=['code', 'mongo'])
+        self.assertEqual(post.tags, ['code', 'mongo', 'python'])
+
+        # Assert same order of the list items is maintained in the db
+        self.assertEqual(
+            BlogPost._get_collection().find_one({'_id': post.pk})['tags'],
+            ['code', 'mongo', 'python']
+        )
+
     def test_save(self):
-        """Ensure that a document may be saved in the database.
-        """
+        """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._get_collection_name()]
         person_obj = collection.find_one({'name': 'Test User'})
         self.assertEqual(person_obj['name'], 'Test User')
         self.assertEqual(person_obj['age'], 30)
         self.assertEqual(person_obj['_id'], person.id)
-        # Test skipping validation on save
 
+        # Test skipping validation on save
         class Recipient(Document):
             email = EmailField(required=True)
 
-        recipient = Recipient(email='root@localhost')
+        recipient = Recipient(email='not-an-email')
         self.assertRaises(ValidationError, recipient.save)
-
-        try:
-            recipient.save(validate=False)
-        except ValidationError:
-            self.fail()
+        recipient.save(validate=False)
 
     def test_save_to_a_value_that_equates_to_false(self):
-
         class Thing(EmbeddedDocument):
             count = IntField()
 
@@ -889,7 +886,6 @@ class InstanceTest(unittest.TestCase):
         self.assertEqual(user.thing.count, 0)
 
     def test_save_max_recursion_not_hit(self):
-
         class Person(Document):
             name = StringField()
             parent = ReferenceField('self')
@@ -915,7 +911,6 @@ class InstanceTest(unittest.TestCase):
         p0.save()
 
     def test_save_max_recursion_not_hit_with_file_field(self):
-
         class Foo(Document):
             name = StringField()
             picture = FileField()
@@ -939,7 +934,6 @@ class InstanceTest(unittest.TestCase):
             self.assertEqual(b.picture, b.bar.picture, b.bar.bar.picture)
 
     def test_save_cascades(self):
-
         class Person(Document):
             name = StringField()
             parent = ReferenceField('self')
@@ -962,7 +956,6 @@ class InstanceTest(unittest.TestCase):
         self.assertEqual(p1.name, p.parent.name)
 
     def test_save_cascade_kwargs(self):
-
         class Person(Document):
             name = StringField()
             parent = ReferenceField('self')
@@ -983,7 +976,6 @@ class InstanceTest(unittest.TestCase):
         self.assertEqual(p1.name, p2.parent.name)
 
     def test_save_cascade_meta_false(self):
-
         class Person(Document):
             name = StringField()
             parent = ReferenceField('self')
@@ -1012,7 +1004,6 @@ class InstanceTest(unittest.TestCase):
         self.assertEqual(p1.name, p.parent.name)
 
     def test_save_cascade_meta_true(self):
-
         class Person(Document):
             name = StringField()
             parent = ReferenceField('self')
@@ -1037,7 +1028,6 @@ class InstanceTest(unittest.TestCase):
         self.assertNotEqual(p1.name, p.parent.name)
 
     def test_save_cascades_generically(self):
-
         class Person(Document):
             name = StringField()
             parent = GenericReferenceField()
@@ -1063,7 +1053,6 @@ class InstanceTest(unittest.TestCase):
         self.assertEqual(p1.name, p.parent.name)
 
     def test_save_atomicity_condition(self):
-
         class Widget(Document):
             toggle = BooleanField(default=False)
             count = IntField(default=0)
@@ -1141,7 +1130,8 @@ class InstanceTest(unittest.TestCase):
 
     def test_update(self):
         """Ensure that an existing document is updated instead of be
-        overwritten."""
+        overwritten.
+        """
         # Create person object and save it to the database
         person = self.Person(name='Test User', age=30)
         person.save()
@@ -1223,6 +1213,19 @@ class InstanceTest(unittest.TestCase):
         self.assertEqual(person.name, None)
         self.assertEqual(person.age, None)
 
+    def test_update_rename_operator(self):
+        """Test the $rename operator."""
+        coll = self.Person._get_collection()
+        doc = self.Person(name='John').save()
+        raw_doc = coll.find_one({'_id': doc.pk})
+        self.assertEqual(set(raw_doc.keys()), set(['_id', '_cls', 'name']))
+
+        doc.update(rename__name='first_name')
+        raw_doc = coll.find_one({'_id': doc.pk})
+        self.assertEqual(set(raw_doc.keys()),
+                         set(['_id', '_cls', 'first_name']))
+        self.assertEqual(raw_doc['first_name'], 'John')
+
     def test_inserts_if_you_set_the_pk(self):
         p1 = self.Person(name='p1', id=bson.ObjectId()).save()
         p2 = self.Person(name='p2')
@@ -1232,7 +1235,6 @@ class InstanceTest(unittest.TestCase):
         self.assertEqual(2, self.Person.objects.count())
 
     def test_can_save_if_not_included(self):
-
         class EmbeddedDoc(EmbeddedDocument):
             pass
 
@@ -1319,10 +1321,7 @@ class InstanceTest(unittest.TestCase):
             doc2.update(set__name=doc1.name)
 
     def test_embedded_update(self):
-        """
-        Test update on `EmbeddedDocumentField` fields
-        """
-
+        """Test update on `EmbeddedDocumentField` fields."""
         class Page(EmbeddedDocument):
             log_message = StringField(verbose_name="Log message",
                                       required=True)
@@ -1343,11 +1342,9 @@ class InstanceTest(unittest.TestCase):
         self.assertEqual(site.page.log_message, "Error: Dummy message")
 
     def test_embedded_update_db_field(self):
+        """Test update on `EmbeddedDocumentField` fields when db_field
+        is other than default.
         """
-        Test update on `EmbeddedDocumentField` fields when db_field is other
-        than default.
-        """
-
         class Page(EmbeddedDocument):
             log_message = StringField(verbose_name="Log message",
                                       db_field="page_log_message",
@@ -1370,9 +1367,7 @@ class InstanceTest(unittest.TestCase):
         self.assertEqual(site.page.log_message, "Error: Dummy message")
 
     def test_save_only_changed_fields(self):
-        """Ensure save only sets / unsets changed fields
-        """
-
+        """Ensure save only sets / unsets changed fields."""
         class User(self.Person):
             active = BooleanField(default=True)
 
@@ -1492,8 +1487,8 @@ class InstanceTest(unittest.TestCase):
             self.assertEqual(q, 3)
 
     def test_set_unset_one_operation(self):
-        """Ensure that $set and $unset actions are performed in the same
-        operation.
+        """Ensure that $set and $unset actions are performed in the
+        same operation.
         """
         class FooBar(Document):
             foo = StringField(default=None)
@@ -1514,9 +1509,7 @@ class InstanceTest(unittest.TestCase):
             self.assertEqual(1, q)
 
     def test_save_only_changed_fields_recursive(self):
-        """Ensure save only sets / unsets changed fields
-        """
-
+        """Ensure save only sets / unsets changed fields."""
         class Comment(EmbeddedDocument):
             published = BooleanField(default=True)
 
@@ -1556,8 +1549,7 @@ class InstanceTest(unittest.TestCase):
         self.assertFalse(person.comments_dict['first_post'].published)
 
     def test_delete(self):
-        """Ensure that document may be deleted using the delete method.
-        """
+        """Ensure that document may be deleted using the delete method."""
         person = self.Person(name="Test User", age=30)
         person.save()
         self.assertEqual(self.Person.objects.count(), 1)
@@ -1565,33 +1557,34 @@ class InstanceTest(unittest.TestCase):
         self.assertEqual(self.Person.objects.count(), 0)
 
     def test_save_custom_id(self):
-        """Ensure that a document may be saved with a custom _id.
-        """
+        """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._get_collection_name()]
         person_obj = collection.find_one({'name': 'Test User'})
         self.assertEqual(str(person_obj['_id']), '497ce96f395f2f052a494fd4')
 
     def test_save_custom_pk(self):
-        """
-        Ensure that a document may be saved with a custom _id using pk alias.
+        """Ensure that a document may be saved with a custom _id using
+        pk alias.
         """
         # Create person object and save it to the database
         person = self.Person(name='Test User', age=30,
                              pk='497ce96f395f2f052a494fd4')
         person.save()
+
         # Ensure that the object is in the database with the correct _id
         collection = self.db[self.Person._get_collection_name()]
         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.
-        """
+        """Ensure that a list field may be properly saved."""
         class Comment(EmbeddedDocument):
             content = StringField()
 
@@ -1614,8 +1607,6 @@ class InstanceTest(unittest.TestCase):
         for comment_obj, comment in zip(post_obj['comments'], comments):
             self.assertEqual(comment_obj['content'], comment['content'])
 
-        BlogPost.drop_collection()
-
     def test_list_search_by_embedded(self):
         class User(Document):
             username = StringField(required=True)
@@ -1675,8 +1666,8 @@ class InstanceTest(unittest.TestCase):
             list(Page.objects.filter(comments__user=u3)))
 
     def test_save_embedded_document(self):
-        """Ensure that a document with an embedded document field may be
-        saved in the database.
+        """Ensure that a document with an embedded document field may
+        be saved in the database.
         """
         class EmployeeDetails(EmbeddedDocument):
             position = StringField()
@@ -1695,13 +1686,13 @@ class InstanceTest(unittest.TestCase):
         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_embedded_update_after_save(self):
-        """
-        Test update of `EmbeddedDocumentField` attached to a newly saved
-        document.
+        """Test update of `EmbeddedDocumentField` attached to a newly
+        saved document.
         """
         class Page(EmbeddedDocument):
             log_message = StringField(verbose_name="Log message",
@@ -1722,8 +1713,8 @@ class InstanceTest(unittest.TestCase):
         self.assertEqual(site.page.log_message, "Error: Dummy message")
 
     def test_updating_an_embedded_document(self):
-        """Ensure that a document with an embedded document field may be
-        saved in the database.
+        """Ensure that a document with an embedded document field may
+        be saved in the database.
         """
         class EmployeeDetails(EmbeddedDocument):
             position = StringField()
@@ -1758,7 +1749,6 @@ class InstanceTest(unittest.TestCase):
         self.assertEqual(promoted_employee.details, None)
 
     def test_object_mixins(self):
-
         class NameMixin(object):
             name = StringField()
 
@@ -1797,9 +1787,9 @@ class InstanceTest(unittest.TestCase):
         self.assertEqual(t.count, 12)
 
     def test_save_reference(self):
-        """Ensure that a document reference field may be saved in the database.
+        """Ensure that a document reference field may be saved in the
+        database.
         """
-
         class BlogPost(Document):
             meta = {'collection': 'blogpost_1'}
             content = StringField()
@@ -1830,8 +1820,6 @@ class InstanceTest(unittest.TestCase):
         author = list(self.Person.objects(name='Test User'))[-1]
         self.assertEqual(author.age, 25)
 
-        BlogPost.drop_collection()
-
     def test_duplicate_db_fields_raise_invalid_document_error(self):
         """Ensure a InvalidDocumentError is thrown if duplicate fields
         declare the same db_field.
@@ -1842,7 +1830,7 @@ class InstanceTest(unittest.TestCase):
                 name2 = StringField(db_field='name')
 
     def test_invalid_son(self):
-        """Raise an error if loading invalid data"""
+        """Raise an error if loading invalid data."""
         class Occurrence(EmbeddedDocument):
             number = IntField()
 
@@ -1860,10 +1848,14 @@ class InstanceTest(unittest.TestCase):
                 'occurs': {"hello": None}
             })
 
-    def test_reverse_delete_rule_cascade_and_nullify(self):
-        """Ensure that a referenced document is also deleted upon deletion.
-        """
+        # Tests for issue #1438: https://github.com/MongoEngine/mongoengine/issues/1438
+        with self.assertRaises(ValueError):
+            Word._from_son('this is not a valid SON dict')
 
+    def test_reverse_delete_rule_cascade_and_nullify(self):
+        """Ensure that a referenced document is also deleted upon
+        deletion.
+        """
         class BlogPost(Document):
             content = StringField()
             author = ReferenceField(self.Person, reverse_delete_rule=CASCADE)
@@ -1918,7 +1910,8 @@ class InstanceTest(unittest.TestCase):
         self.assertEqual(Book.objects.count(), 0)
 
     def test_reverse_delete_rule_with_shared_id_among_collections(self):
-        """Ensure that cascade delete rule doesn't mix id among collections.
+        """Ensure that cascade delete rule doesn't mix id among
+        collections.
         """
         class User(Document):
             id = IntField(primary_key=True)
@@ -1949,10 +1942,9 @@ class InstanceTest(unittest.TestCase):
         self.assertEqual(Book.objects.get(), book_2)
 
     def test_reverse_delete_rule_with_document_inheritance(self):
-        """Ensure that a referenced document is also deleted upon deletion
-        of a child document.
+        """Ensure that a referenced document is also deleted upon
+        deletion of a child document.
         """
-
         class Writer(self.Person):
             pass
 
@@ -1984,10 +1976,9 @@ class InstanceTest(unittest.TestCase):
         self.assertEqual(BlogPost.objects.count(), 0)
 
     def test_reverse_delete_rule_cascade_and_nullify_complex_field(self):
-        """Ensure that a referenced document is also deleted upon deletion for
-        complex fields.
+        """Ensure that a referenced document is also deleted upon
+        deletion for complex fields.
         """
-
         class BlogPost(Document):
             content = StringField()
             authors = ListField(ReferenceField(
@@ -1996,7 +1987,6 @@ class InstanceTest(unittest.TestCase):
                 self.Person, reverse_delete_rule=NULLIFY))
 
         self.Person.drop_collection()
-
         BlogPost.drop_collection()
 
         author = self.Person(name='Test User')
@@ -2020,10 +2010,10 @@ class InstanceTest(unittest.TestCase):
         self.assertEqual(BlogPost.objects.count(), 0)
 
     def test_reverse_delete_rule_cascade_triggers_pre_delete_signal(self):
-        """ ensure the pre_delete signal is triggered upon a cascading deletion
-        setup a blog post with content, an author and editor
-        delete the author which triggers deletion of blogpost via cascade
-        blog post's pre_delete signal alters an editor attribute
+        """Ensure the pre_delete signal is triggered upon a cascading
+        deletion setup a blog post with content, an author and editor
+        delete the author which triggers deletion of blogpost via
+        cascade blog post's pre_delete signal alters an editor attribute.
         """
         class Editor(self.Person):
             review_queue = IntField(default=0)
@@ -2051,6 +2041,7 @@ class InstanceTest(unittest.TestCase):
 
         # delete the author, the post is also deleted due to the CASCADE rule
         author.delete()
+
         # the pre-delete signal should have decremented the editor's queue
         editor = Editor.objects(name='Max P.').get()
         self.assertEqual(editor.review_queue, 0)
@@ -2059,7 +2050,6 @@ class InstanceTest(unittest.TestCase):
         """Ensure that Bi-Directional relationships work with
         reverse_delete_rule
         """
-
         class Bar(Document):
             content = StringField()
             foo = ReferenceField('Foo')
@@ -2105,8 +2095,8 @@ class InstanceTest(unittest.TestCase):
                 mother = ReferenceField('Person', reverse_delete_rule=DENY)
 
     def test_reverse_delete_rule_cascade_recurs(self):
-        """Ensure that a chain of documents is also deleted upon cascaded
-        deletion.
+        """Ensure that a chain of documents is also deleted upon
+        cascaded deletion.
         """
         class BlogPost(Document):
             content = StringField()
@@ -2136,15 +2126,10 @@ class InstanceTest(unittest.TestCase):
         author.delete()
         self.assertEqual(Comment.objects.count(), 0)
 
-        self.Person.drop_collection()
-        BlogPost.drop_collection()
-        Comment.drop_collection()
-
     def test_reverse_delete_rule_deny(self):
-        """Ensure that a document cannot be referenced if there are still
-        documents referring to it.
+        """Ensure that a document cannot be referenced if there are
+        still documents referring to it.
         """
-
         class BlogPost(Document):
             content = StringField()
             author = ReferenceField(self.Person, reverse_delete_rule=DENY)
@@ -2172,11 +2157,7 @@ class InstanceTest(unittest.TestCase):
         author.delete()
         self.assertEqual(self.Person.objects.count(), 1)
 
-        self.Person.drop_collection()
-        BlogPost.drop_collection()
-
     def subclasses_and_unique_keys_works(self):
-
         class A(Document):
             pass
 
@@ -2192,19 +2173,16 @@ class InstanceTest(unittest.TestCase):
 
         self.assertEqual(A.objects.count(), 2)
         self.assertEqual(B.objects.count(), 1)
-        A.drop_collection()
-        B.drop_collection()
 
     def test_document_hash(self):
-        """Test document in list, dict, set
-        """
+        """Test document in list, dict, set."""
         class User(Document):
             pass
 
         class BlogPost(Document):
             pass
 
-        # Clear old datas
+        # Clear old data
         User.drop_collection()
         BlogPost.drop_collection()
 
@@ -2216,17 +2194,18 @@ class InstanceTest(unittest.TestCase):
         b1 = BlogPost.objects.create()
         b2 = BlogPost.objects.create()
 
-        # in List
+        # Make sure docs are properly identified in a list (__eq__ is used
+        # for the comparison).
         all_user_list = list(User.objects.all())
-
         self.assertTrue(u1 in all_user_list)
         self.assertTrue(u2 in all_user_list)
         self.assertTrue(u3 in all_user_list)
-        self.assertFalse(u4 in all_user_list)  # New object
-        self.assertFalse(b1 in all_user_list)  # Other object
-        self.assertFalse(b2 in all_user_list)  # Other object
+        self.assertTrue(u4 not in all_user_list)  # New object
+        self.assertTrue(b1 not in all_user_list)  # Other object
+        self.assertTrue(b2 not in all_user_list)  # Other object
 
-        # in Dict
+        # Make sure docs can be used as keys in a dict (__hash__ is used
+        # for hashing the docs).
         all_user_dic = {}
         for u in User.objects.all():
             all_user_dic[u] = "OK"
@@ -2238,13 +2217,22 @@ class InstanceTest(unittest.TestCase):
         self.assertEqual(all_user_dic.get(b1, False), False)  # Other object
         self.assertEqual(all_user_dic.get(b2, False), False)  # Other object
 
-        # in Set
+        # Make sure docs are properly identified in a set (__hash__ is used
+        # for hashing the docs).
         all_user_set = set(User.objects.all())
-
         self.assertTrue(u1 in all_user_set)
+        self.assertTrue(u4 not in all_user_set)
+        self.assertTrue(b1 not in all_user_list)
+        self.assertTrue(b2 not in all_user_list)
+
+        # Make sure duplicate docs aren't accepted in the set
+        self.assertEqual(len(all_user_set), 3)
+        all_user_set.add(u1)
+        all_user_set.add(u2)
+        all_user_set.add(u3)
+        self.assertEqual(len(all_user_set), 3)
 
     def test_picklable(self):
-
         pickle_doc = PickleTest(number=1, string="One", lists=['1', '2'])
         pickle_doc.embedded = PickleEmbedded()
         pickled_doc = pickle.dumps(pickle_doc)  # make sure pickling works even before the doc is saved
@@ -2270,7 +2258,6 @@ class InstanceTest(unittest.TestCase):
         self.assertEqual(pickle_doc.lists, ["1", "2", "3"])
 
     def test_regular_document_pickle(self):
-
         pickle_doc = PickleTest(number=1, string="One", lists=['1', '2'])
         pickled_doc = pickle.dumps(pickle_doc)  # make sure pickling works even before the doc is saved
         pickle_doc.save()
@@ -2293,7 +2280,6 @@ class InstanceTest(unittest.TestCase):
         fixtures.PickleTest = PickleTest
 
     def test_dynamic_document_pickle(self):
-
         pickle_doc = PickleDynamicTest(
             name="test", number=1, string="One", lists=['1', '2'])
         pickle_doc.embedded = PickleDynamicEmbedded(foo="Bar")
@@ -2332,7 +2318,6 @@ class InstanceTest(unittest.TestCase):
                 validate = DictField()
 
     def test_mutating_documents(self):
-
         class B(EmbeddedDocument):
             field1 = StringField(default='field1')
 
@@ -2340,6 +2325,7 @@ class InstanceTest(unittest.TestCase):
             b = EmbeddedDocumentField(B, default=lambda: B())
 
         A.drop_collection()
+
         a = A()
         a.save()
         a.reload()
@@ -2363,12 +2349,13 @@ class InstanceTest(unittest.TestCase):
         self.assertEqual(a.b.field2.c_field, 'new value')
 
     def test_can_save_false_values(self):
-        """Ensures you can save False values on save"""
+        """Ensures you can save False values on save."""
         class Doc(Document):
             foo = StringField()
             archived = BooleanField(default=False, required=True)
 
         Doc.drop_collection()
+
         d = Doc()
         d.save()
         d.archived = False
@@ -2377,11 +2364,12 @@ class InstanceTest(unittest.TestCase):
         self.assertEqual(Doc.objects(archived=False).count(), 1)
 
     def test_can_save_false_values_dynamic(self):
-        """Ensures you can save False values on dynamic docs"""
+        """Ensures you can save False values on dynamic docs."""
         class Doc(DynamicDocument):
             foo = StringField()
 
         Doc.drop_collection()
+
         d = Doc()
         d.save()
         d.archived = False
@@ -2421,7 +2409,7 @@ class InstanceTest(unittest.TestCase):
             Collection.update = orig_update
 
     def test_db_alias_tests(self):
-        """ DB Alias tests """
+        """DB Alias tests."""
         # mongoenginetest - Is default connection alias from setUp()
         # Register Aliases
         register_connection('testdb-1', 'mongoenginetest2')
@@ -2483,8 +2471,7 @@ class InstanceTest(unittest.TestCase):
             get_db("testdb-3")[AuthorBooks._get_collection_name()])
 
     def test_db_alias_overrides(self):
-        """db_alias can be overriden
-        """
+        """Test db_alias can be overriden."""
         # Register a connection with db_alias testdb-2
         register_connection('testdb-2', 'mongoenginetest2')
 
@@ -2508,8 +2495,7 @@ class InstanceTest(unittest.TestCase):
                          B._get_collection().database.name)
 
     def test_db_alias_propagates(self):
-        """db_alias propagates?
-        """
+        """db_alias propagates?"""
         register_connection('testdb-1', 'mongoenginetest2')
 
         class A(Document):
@@ -2522,8 +2508,7 @@ class InstanceTest(unittest.TestCase):
         self.assertEqual('testdb-1', B._meta.get('db_alias'))
 
     def test_db_ref_usage(self):
-        """ DB Ref usage  in dict_fields"""
-
+        """DB Ref usage in dict_fields."""
         class User(Document):
             name = StringField()
 
@@ -2758,7 +2743,6 @@ class InstanceTest(unittest.TestCase):
         self.assertEqual(user.thing._data['data'], [1, 2, 3])
 
     def test_spaces_in_keys(self):
-
         class Embedded(DynamicEmbeddedDocument):
             pass
 
@@ -2847,7 +2831,6 @@ class InstanceTest(unittest.TestCase):
             log.machine = "127.0.0.1"
 
     def test_kwargs_simple(self):
-
         class Embedded(EmbeddedDocument):
             name = StringField()
 
@@ -2867,7 +2850,6 @@ class InstanceTest(unittest.TestCase):
         self.assertEqual(classic_doc._data, dict_doc._data)
 
     def test_kwargs_complex(self):
-
         class Embedded(EmbeddedDocument):
             name = StringField()
 
@@ -2890,36 +2872,35 @@ class InstanceTest(unittest.TestCase):
         self.assertEqual(classic_doc._data, dict_doc._data)
 
     def test_positional_creation(self):
-        """Ensure that document may be created using positional arguments.
-        """
+        """Ensure that document may be created using positional arguments."""
         person = self.Person("Test User", 42)
         self.assertEqual(person.name, "Test User")
         self.assertEqual(person.age, 42)
 
     def test_mixed_creation(self):
-        """Ensure that document may be created using mixed arguments.
-        """
+        """Ensure that document may be created using mixed arguments."""
         person = self.Person("Test User", age=42)
         self.assertEqual(person.name, "Test User")
         self.assertEqual(person.age, 42)
 
     def test_positional_creation_embedded(self):
-        """Ensure that embedded document may be created using positional arguments.
+        """Ensure that embedded document may be created using positional
+        arguments.
         """
         job = self.Job("Test Job", 4)
         self.assertEqual(job.name, "Test Job")
         self.assertEqual(job.years, 4)
 
     def test_mixed_creation_embedded(self):
-        """Ensure that embedded document may be created using mixed arguments.
+        """Ensure that embedded document may be created using mixed
+        arguments.
         """
         job = self.Job("Test Job", years=4)
         self.assertEqual(job.name, "Test Job")
         self.assertEqual(job.years, 4)
 
     def test_mixed_creation_dynamic(self):
-        """Ensure that document may be created using mixed arguments.
-        """
+        """Ensure that document may be created using mixed arguments."""
         class Person(DynamicDocument):
             name = StringField()
 
@@ -2928,14 +2909,14 @@ class InstanceTest(unittest.TestCase):
         self.assertEqual(person.age, 42)
 
     def test_bad_mixed_creation(self):
-        """Ensure that document gives correct error when duplicating arguments
+        """Ensure that document gives correct error when duplicating
+        arguments.
         """
         with self.assertRaises(TypeError):
             return self.Person("Test User", 42, name="Bad User")
 
     def test_data_contains_id_field(self):
-        """Ensure that asking for _data returns 'id'
-        """
+        """Ensure that asking for _data returns 'id'."""
         class Person(Document):
             name = StringField()
 
@@ -2947,7 +2928,6 @@ class InstanceTest(unittest.TestCase):
         self.assertEqual(person._data.get('id'), person.id)
 
     def test_complex_nesting_document_and_embedded_document(self):
-
         class Macro(EmbeddedDocument):
             value = DynamicField(default="UNDEFINED")
 
@@ -2990,7 +2970,6 @@ class InstanceTest(unittest.TestCase):
             system.nodes["node"].parameters["param"].macros["test"].value)
 
     def test_embedded_document_equality(self):
-
         class Test(Document):
             field = StringField(required=True)
 
@@ -3176,8 +3155,7 @@ class InstanceTest(unittest.TestCase):
         self.assertEqual(idx, 2)
 
     def test_falsey_pk(self):
-        """Ensure that we can create and update a document with Falsey PK.
-        """
+        """Ensure that we can create and update a document with Falsey PK."""
         class Person(Document):
             age = IntField(primary_key=True)
             height = FloatField()
@@ -3189,6 +3167,22 @@ class InstanceTest(unittest.TestCase):
 
         person.update(set__height=2.0)
 
+    @needs_mongodb_v26
+    def test_push_with_position(self):
+        """Ensure that push with position works properly for an instance."""
+        class BlogPost(Document):
+            slug = StringField()
+            tags = ListField(StringField())
+
+        blog = BlogPost()
+        blog.slug = "ABC"
+        blog.tags = ["python"]
+        blog.save()
+
+        blog.update(push__tags__0=["mongodb", "code"])
+        blog.reload()
+        self.assertEqual(blog.tags, ['mongodb', 'code', 'python'])
+
 
 if __name__ == '__main__':
     unittest.main()

tests/fields/file_tests.py

@@ -18,15 +18,13 @@ try:
 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(unittest.TestCase):
-
-    def setUp(self):
-        connect(db='mongoenginetest')
-        self.db = get_db()
+class FileTest(MongoDBTestCase):
 
     def tearDown(self):
         self.db.drop_collection('fs.files')

tests/queryset/field_list.py

@@ -141,6 +141,16 @@ class OnlyExcludeAllTest(unittest.TestCase):
         self.assertEqual(qs._loaded_fields.as_dict(),
                          {'b': {'$slice': 5}})
 
+    def test_mix_slice_with_other_fields(self):
+        class MyDoc(Document):
+            a = ListField()
+            b = ListField()
+            c = ListField()
+
+        qs = MyDoc.objects.fields(a=1, b=0, slice__c=2)
+        self.assertEqual(qs._loaded_fields.as_dict(),
+                         {'c': {'$slice': 2}, 'a': 1})
+
     def test_only(self):
         """Ensure that QuerySet.only only returns the requested fields.
         """
@@ -187,14 +197,18 @@ class OnlyExcludeAllTest(unittest.TestCase):
             title = StringField()
             text = StringField()
 
+        class VariousData(EmbeddedDocument):
+            some = BooleanField()
+
         class BlogPost(Document):
             content = StringField()
             author = EmbeddedDocumentField(User)
             comments = ListField(EmbeddedDocumentField(Comment))
+            various = MapField(field=EmbeddedDocumentField(VariousData))
 
         BlogPost.drop_collection()
 
-        post = BlogPost(content='Had a good coffee today...')
+        post = BlogPost(content='Had a good coffee today...', various={'test_dynamic':{'some': True}})
         post.author = User(name='Test User')
         post.comments = [Comment(title='I aggree', text='Great post!'), Comment(title='Coffee', text='I hate coffee')]
         post.save()
@@ -205,6 +219,9 @@ class OnlyExcludeAllTest(unittest.TestCase):
         self.assertEqual(obj.author.name, 'Test User')
         self.assertEqual(obj.comments, [])
 
+        obj = BlogPost.objects.only('various.test_dynamic.some').get()
+        self.assertEqual(obj.various["test_dynamic"].some, True)
+
         obj = BlogPost.objects.only('content', 'comments.title',).get()
         self.assertEqual(obj.content, 'Had a good coffee today...')
         self.assertEqual(obj.author, None)

tests/queryset/geo.py

@@ -1,105 +1,139 @@
-from datetime import datetime, timedelta
+import datetime
 import unittest
 
-from pymongo.errors import OperationFailure
 from mongoengine import *
-from mongoengine.connection import get_connection
-from nose.plugins.skip import SkipTest
+
+from tests.utils import MongoDBTestCase, needs_mongodb_v3
 
 
 __all__ = ("GeoQueriesTest",)
 
 
-class GeoQueriesTest(unittest.TestCase):
+class GeoQueriesTest(MongoDBTestCase):
 
-    def setUp(self):
-        connect(db='mongoenginetest')
-
-    def test_geospatial_operators(self):
-        """Ensure that geospatial queries are working.
-        """
+    def _create_event_data(self, point_field_class=GeoPointField):
+        """Create some sample data re-used in many of the tests below."""
         class Event(Document):
             title = StringField()
             date = DateTimeField()
-            location = GeoPointField()
+            location = point_field_class()
 
             def __unicode__(self):
                 return self.title
 
+        self.Event = Event
+
         Event.drop_collection()
 
-        event1 = Event(title="Coltrane Motion @ Double Door",
-                       date=datetime.now() - timedelta(days=1),
-                       location=[-87.677137, 41.909889]).save()
-        event2 = Event(title="Coltrane Motion @ Bottom of the Hill",
-                       date=datetime.now() - timedelta(days=10),
-                       location=[-122.4194155, 37.7749295]).save()
-        event3 = Event(title="Coltrane Motion @ Empty Bottle",
-                       date=datetime.now(),
-                       location=[-87.686638, 41.900474]).save()
+        event1 = Event.objects.create(
+            title="Coltrane Motion @ Double Door",
+            date=datetime.datetime.now() - datetime.timedelta(days=1),
+            location=[-87.677137, 41.909889])
+        event2 = Event.objects.create(
+            title="Coltrane Motion @ Bottom of the Hill",
+            date=datetime.datetime.now() - datetime.timedelta(days=10),
+            location=[-122.4194155, 37.7749295])
+        event3 = Event.objects.create(
+            title="Coltrane Motion @ Empty Bottle",
+            date=datetime.datetime.now(),
+            location=[-87.686638, 41.900474])
+
+        return event1, event2, event3
+
+    def test_near(self):
+        """Make sure the "near" operator works."""
+        event1, event2, event3 = self._create_event_data()
 
         # find all events "near" pitchfork office, chicago.
         # note that "near" will show the san francisco event, too,
         # although it sorts to last.
-        events = Event.objects(location__near=[-87.67892, 41.9120459])
+        events = self.Event.objects(location__near=[-87.67892, 41.9120459])
         self.assertEqual(events.count(), 3)
         self.assertEqual(list(events), [event1, event3, event2])
 
+        # ensure ordering is respected by "near"
+        events = self.Event.objects(location__near=[-87.67892, 41.9120459])
+        events = events.order_by("-date")
+        self.assertEqual(events.count(), 3)
+        self.assertEqual(list(events), [event3, event1, event2])
+
+    def test_near_and_max_distance(self):
+        """Ensure the "max_distance" operator works alongside the "near"
+        operator.
+        """
+        event1, event2, event3 = self._create_event_data()
+
+        # find events within 10 degrees of san francisco
+        point = [-122.415579, 37.7566023]
+        events = self.Event.objects(location__near=point,
+                                    location__max_distance=10)
+        self.assertEqual(events.count(), 1)
+        self.assertEqual(events[0], event2)
+
+    # $minDistance was added in MongoDB v2.6, but continued being buggy
+    # until v3.0; skip for older versions
+    @needs_mongodb_v3
+    def test_near_and_min_distance(self):
+        """Ensure the "min_distance" operator works alongside the "near"
+        operator.
+        """
+        event1, event2, event3 = self._create_event_data()
+
+        # find events at least 10 degrees away of san francisco
+        point = [-122.415579, 37.7566023]
+        events = self.Event.objects(location__near=point,
+                                    location__min_distance=10)
+        self.assertEqual(events.count(), 2)
+
+    def test_within_distance(self):
+        """Make sure the "within_distance" operator works."""
+        event1, event2, event3 = self._create_event_data()
+
         # find events within 5 degrees of pitchfork office, chicago
         point_and_distance = [[-87.67892, 41.9120459], 5]
-        events = Event.objects(location__within_distance=point_and_distance)
+        events = self.Event.objects(
+            location__within_distance=point_and_distance)
         self.assertEqual(events.count(), 2)
         events = list(events)
         self.assertTrue(event2 not in events)
         self.assertTrue(event1 in events)
         self.assertTrue(event3 in events)
 
-        # ensure ordering is respected by "near"
-        events = Event.objects(location__near=[-87.67892, 41.9120459])
-        events = events.order_by("-date")
-        self.assertEqual(events.count(), 3)
-        self.assertEqual(list(events), [event3, event1, event2])
-
-        # find events within 10 degrees of san francisco
-        point = [-122.415579, 37.7566023]
-        events = Event.objects(location__near=point, location__max_distance=10)
-        self.assertEqual(events.count(), 1)
-        self.assertEqual(events[0], event2)
-
-        # find events at least 10 degrees away of san francisco
-        point = [-122.415579, 37.7566023]
-        events = Event.objects(location__near=point, location__min_distance=10)
-        # The following real test passes on MongoDB 3 but minDistance seems
-        # buggy on older MongoDB versions
-        if get_connection().server_info()['versionArray'][0] > 2:
-            self.assertEqual(events.count(), 2)
-        else:
-            self.assertTrue(events.count() >= 2)
-
         # find events within 10 degrees of san francisco
         point_and_distance = [[-122.415579, 37.7566023], 10]
-        events = Event.objects(location__within_distance=point_and_distance)
+        events = self.Event.objects(
+            location__within_distance=point_and_distance)
         self.assertEqual(events.count(), 1)
         self.assertEqual(events[0], event2)
 
         # find events within 1 degree of greenpoint, broolyn, nyc, ny
         point_and_distance = [[-73.9509714, 40.7237134], 1]
-        events = Event.objects(location__within_distance=point_and_distance)
+        events = self.Event.objects(
+            location__within_distance=point_and_distance)
         self.assertEqual(events.count(), 0)
 
         # ensure ordering is respected by "within_distance"
         point_and_distance = [[-87.67892, 41.9120459], 10]
-        events = Event.objects(location__within_distance=point_and_distance)
+        events = self.Event.objects(
+            location__within_distance=point_and_distance)
         events = events.order_by("-date")
         self.assertEqual(events.count(), 2)
         self.assertEqual(events[0], event3)
 
+    def test_within_box(self):
+        """Ensure the "within_box" operator works."""
+        event1, event2, event3 = self._create_event_data()
+
         # check that within_box works
         box = [(-125.0, 35.0), (-100.0, 40.0)]
-        events = Event.objects(location__within_box=box)
+        events = self.Event.objects(location__within_box=box)
         self.assertEqual(events.count(), 1)
         self.assertEqual(events[0].id, event2.id)
 
+    def test_within_polygon(self):
+        """Ensure the "within_polygon" operator works."""
+        event1, event2, event3 = self._create_event_data()
+
         polygon = [
             (-87.694445, 41.912114),
             (-87.69084, 41.919395),
@@ -107,7 +141,7 @@ class GeoQueriesTest(unittest.TestCase):
             (-87.654276, 41.911731),
             (-87.656164, 41.898061),
         ]
-        events = Event.objects(location__within_polygon=polygon)
+        events = self.Event.objects(location__within_polygon=polygon)
         self.assertEqual(events.count(), 1)
         self.assertEqual(events[0].id, event1.id)
 
@@ -116,13 +150,151 @@ class GeoQueriesTest(unittest.TestCase):
             (-1.225891, 52.792797),
             (-4.40094, 53.389881)
         ]
-        events = Event.objects(location__within_polygon=polygon2)
+        events = self.Event.objects(location__within_polygon=polygon2)
         self.assertEqual(events.count(), 0)
 
-    def test_geo_spatial_embedded(self):
+    def test_2dsphere_near(self):
+        """Make sure the "near" operator works with a PointField, which
+        corresponds to a 2dsphere index.
+        """
+        event1, event2, event3 = self._create_event_data(
+            point_field_class=PointField
+        )
 
+        # find all events "near" pitchfork office, chicago.
+        # note that "near" will show the san francisco event, too,
+        # although it sorts to last.
+        events = self.Event.objects(location__near=[-87.67892, 41.9120459])
+        self.assertEqual(events.count(), 3)
+        self.assertEqual(list(events), [event1, event3, event2])
+
+        # ensure ordering is respected by "near"
+        events = self.Event.objects(location__near=[-87.67892, 41.9120459])
+        events = events.order_by("-date")
+        self.assertEqual(events.count(), 3)
+        self.assertEqual(list(events), [event3, event1, event2])
+
+    def test_2dsphere_near_and_max_distance(self):
+        """Ensure the "max_distance" operator works alongside the "near"
+        operator with a 2dsphere index.
+        """
+        event1, event2, event3 = self._create_event_data(
+            point_field_class=PointField
+        )
+
+        # find events within 10km of san francisco
+        point = [-122.415579, 37.7566023]
+        events = self.Event.objects(location__near=point,
+                                    location__max_distance=10000)
+        self.assertEqual(events.count(), 1)
+        self.assertEqual(events[0], event2)
+
+        # find events within 1km of greenpoint, broolyn, nyc, ny
+        events = self.Event.objects(location__near=[-73.9509714, 40.7237134],
+                                    location__max_distance=1000)
+        self.assertEqual(events.count(), 0)
+
+        # ensure ordering is respected by "near"
+        events = self.Event.objects(
+            location__near=[-87.67892, 41.9120459],
+            location__max_distance=10000
+        ).order_by("-date")
+        self.assertEqual(events.count(), 2)
+        self.assertEqual(events[0], event3)
+
+    def test_2dsphere_geo_within_box(self):
+        """Ensure the "geo_within_box" operator works with a 2dsphere
+        index.
+        """
+        event1, event2, event3 = self._create_event_data(
+            point_field_class=PointField
+        )
+
+        # check that within_box works
+        box = [(-125.0, 35.0), (-100.0, 40.0)]
+        events = self.Event.objects(location__geo_within_box=box)
+        self.assertEqual(events.count(), 1)
+        self.assertEqual(events[0].id, event2.id)
+
+    def test_2dsphere_geo_within_polygon(self):
+        """Ensure the "geo_within_polygon" operator works with a
+        2dsphere index.
+        """
+        event1, event2, event3 = self._create_event_data(
+            point_field_class=PointField
+        )
+
+        polygon = [
+            (-87.694445, 41.912114),
+            (-87.69084, 41.919395),
+            (-87.681742, 41.927186),
+            (-87.654276, 41.911731),
+            (-87.656164, 41.898061),
+        ]
+        events = self.Event.objects(location__geo_within_polygon=polygon)
+        self.assertEqual(events.count(), 1)
+        self.assertEqual(events[0].id, event1.id)
+
+        polygon2 = [
+            (-1.742249, 54.033586),
+            (-1.225891, 52.792797),
+            (-4.40094, 53.389881)
+        ]
+        events = self.Event.objects(location__geo_within_polygon=polygon2)
+        self.assertEqual(events.count(), 0)
+
+    # $minDistance was added in MongoDB v2.6, but continued being buggy
+    # until v3.0; skip for older versions
+    @needs_mongodb_v3
+    def test_2dsphere_near_and_min_max_distance(self):
+        """Ensure "min_distace" and "max_distance" operators work well
+        together with the "near" operator in a 2dsphere index.
+        """
+        event1, event2, event3 = self._create_event_data(
+            point_field_class=PointField
+        )
+
+        # ensure min_distance and max_distance combine well
+        events = self.Event.objects(
+            location__near=[-87.67892, 41.9120459],
+            location__min_distance=1000,
+            location__max_distance=10000
+        ).order_by("-date")
+        self.assertEqual(events.count(), 1)
+        self.assertEqual(events[0], event3)
+
+        # ensure ordering is respected by "near" with "min_distance"
+        events = self.Event.objects(
+            location__near=[-87.67892, 41.9120459],
+            location__min_distance=10000
+        ).order_by("-date")
+        self.assertEqual(events.count(), 1)
+        self.assertEqual(events[0], event2)
+
+    def test_2dsphere_geo_within_center(self):
+        """Make sure the "geo_within_center" operator works with a
+        2dsphere index.
+        """
+        event1, event2, event3 = self._create_event_data(
+            point_field_class=PointField
+        )
+
+        # find events within 5 degrees of pitchfork office, chicago
+        point_and_distance = [[-87.67892, 41.9120459], 2]
+        events = self.Event.objects(
+            location__geo_within_center=point_and_distance)
+        self.assertEqual(events.count(), 2)
+        events = list(events)
+        self.assertTrue(event2 not in events)
+        self.assertTrue(event1 in events)
+        self.assertTrue(event3 in events)
+
+    def _test_embedded(self, point_field_class):
+        """Helper test method ensuring given point field class works
+        well in an embedded document.
+        """
         class Venue(EmbeddedDocument):
-            location = GeoPointField()
+            location = point_field_class()
             name = StringField()
 
         class Event(Document):
@@ -148,16 +320,18 @@ class GeoQueriesTest(unittest.TestCase):
         self.assertEqual(events.count(), 3)
         self.assertEqual(list(events), [event1, event3, event2])
 
-    def test_spherical_geospatial_operators(self):
-        """Ensure that spherical geospatial queries are working
-        """
-        # Needs MongoDB > 2.6.4 https://jira.mongodb.org/browse/SERVER-14039
-        connection = get_connection()
-        info = connection.test.command('buildInfo')
-        mongodb_version = tuple([int(i) for i in info['version'].split('.')])
-        if mongodb_version < (2, 6, 4):
-            raise SkipTest("Need MongoDB version 2.6.4+")
+    def test_geo_spatial_embedded(self):
+        """Make sure GeoPointField works properly in an embedded document."""
+        self._test_embedded(point_field_class=GeoPointField)
 
+    def test_2dsphere_point_embedded(self):
+        """Make sure PointField works properly in an embedded document."""
+        self._test_embedded(point_field_class=PointField)
+
+    # Needs MongoDB > 2.6.4 https://jira.mongodb.org/browse/SERVER-14039
+    @needs_mongodb_v3
+    def test_spherical_geospatial_operators(self):
+        """Ensure that spherical geospatial queries are working."""
         class Point(Document):
             location = GeoPointField()
 
@@ -177,7 +351,10 @@ class GeoQueriesTest(unittest.TestCase):
 
         # Same behavior for _within_spherical_distance
         points = Point.objects(
-            location__within_spherical_distance=[[-122, 37.5], 60 / earth_radius]
+            location__within_spherical_distance=[
+                [-122, 37.5],
+                60 / earth_radius
+            ]
         )
         self.assertEqual(points.count(), 2)
 
@@ -194,14 +371,9 @@ class GeoQueriesTest(unittest.TestCase):
         # Test query works with min_distance, being farer from one point
         points = Point.objects(location__near_sphere=[-122, 37.8],
                                location__min_distance=60 / earth_radius)
-        # The following real test passes on MongoDB 3 but minDistance seems
-        # buggy on older MongoDB versions
-        if get_connection().server_info()['versionArray'][0] > 2:
-            self.assertEqual(points.count(), 1)
-            far_point = points.first()
-            self.assertNotEqual(close_point, far_point)
-        else:
-            self.assertTrue(points.count() >= 1)
+        self.assertEqual(points.count(), 1)
+        far_point = points.first()
+        self.assertNotEqual(close_point, far_point)
 
         # Finds both points, but orders the north point first because it's
         # closer to the reference point to the north.
@@ -220,141 +392,15 @@ class GeoQueriesTest(unittest.TestCase):
         # Finds only one point because only the first point is within 60km of
         # the reference point to the south.
         points = Point.objects(
-            location__within_spherical_distance=[[-122, 36.5], 60/earth_radius])
+            location__within_spherical_distance=[
+                [-122, 36.5],
+                60 / earth_radius
+            ]
+        )
         self.assertEqual(points.count(), 1)
         self.assertEqual(points[0].id, south_point.id)
 
-    def test_2dsphere_point(self):
-
-        class Event(Document):
-            title = StringField()
-            date = DateTimeField()
-            location = PointField()
-
-            def __unicode__(self):
-                return self.title
-
-        Event.drop_collection()
-
-        event1 = Event(title="Coltrane Motion @ Double Door",
-                       date=datetime.now() - timedelta(days=1),
-                       location=[-87.677137, 41.909889])
-        event1.save()
-        event2 = Event(title="Coltrane Motion @ Bottom of the Hill",
-                       date=datetime.now() - timedelta(days=10),
-                       location=[-122.4194155, 37.7749295]).save()
-        event3 = Event(title="Coltrane Motion @ Empty Bottle",
-                       date=datetime.now(),
-                       location=[-87.686638, 41.900474]).save()
-
-        # find all events "near" pitchfork office, chicago.
-        # note that "near" will show the san francisco event, too,
-        # although it sorts to last.
-        events = Event.objects(location__near=[-87.67892, 41.9120459])
-        self.assertEqual(events.count(), 3)
-        self.assertEqual(list(events), [event1, event3, event2])
-
-        # find events within 5 degrees of pitchfork office, chicago
-        point_and_distance = [[-87.67892, 41.9120459], 2]
-        events = Event.objects(location__geo_within_center=point_and_distance)
-        self.assertEqual(events.count(), 2)
-        events = list(events)
-        self.assertTrue(event2 not in events)
-        self.assertTrue(event1 in events)
-        self.assertTrue(event3 in events)
-
-        # ensure ordering is respected by "near"
-        events = Event.objects(location__near=[-87.67892, 41.9120459])
-        events = events.order_by("-date")
-        self.assertEqual(events.count(), 3)
-        self.assertEqual(list(events), [event3, event1, event2])
-
-        # find events within 10km of san francisco
-        point = [-122.415579, 37.7566023]
-        events = Event.objects(location__near=point, location__max_distance=10000)
-        self.assertEqual(events.count(), 1)
-        self.assertEqual(events[0], event2)
-
-        # find events within 1km of greenpoint, broolyn, nyc, ny
-        events = Event.objects(location__near=[-73.9509714, 40.7237134], location__max_distance=1000)
-        self.assertEqual(events.count(), 0)
-
-        # ensure ordering is respected by "near"
-        events = Event.objects(location__near=[-87.67892, 41.9120459],
-                               location__max_distance=10000).order_by("-date")
-        self.assertEqual(events.count(), 2)
-        self.assertEqual(events[0], event3)
-
-        # ensure min_distance and max_distance combine well
-        events = Event.objects(location__near=[-87.67892, 41.9120459],
-                               location__min_distance=1000,
-                               location__max_distance=10000).order_by("-date")
-        self.assertEqual(events.count(), 1)
-        self.assertEqual(events[0], event3)
-
-        # ensure ordering is respected by "near"
-        events = Event.objects(location__near=[-87.67892, 41.9120459],
-                               # location__min_distance=10000
-                               location__min_distance=10000).order_by("-date")
-        self.assertEqual(events.count(), 1)
-        self.assertEqual(events[0], event2)
-
-        # check that within_box works
-        box = [(-125.0, 35.0), (-100.0, 40.0)]
-        events = Event.objects(location__geo_within_box=box)
-        self.assertEqual(events.count(), 1)
-        self.assertEqual(events[0].id, event2.id)
-
-        polygon = [
-            (-87.694445, 41.912114),
-            (-87.69084, 41.919395),
-            (-87.681742, 41.927186),
-            (-87.654276, 41.911731),
-            (-87.656164, 41.898061),
-        ]
-        events = Event.objects(location__geo_within_polygon=polygon)
-        self.assertEqual(events.count(), 1)
-        self.assertEqual(events[0].id, event1.id)
-
-        polygon2 = [
-            (-1.742249, 54.033586),
-            (-1.225891, 52.792797),
-            (-4.40094, 53.389881)
-        ]
-        events = Event.objects(location__geo_within_polygon=polygon2)
-        self.assertEqual(events.count(), 0)
-
-    def test_2dsphere_point_embedded(self):
-
-        class Venue(EmbeddedDocument):
-            location = GeoPointField()
-            name = StringField()
-
-        class Event(Document):
-            title = StringField()
-            venue = EmbeddedDocumentField(Venue)
-
-        Event.drop_collection()
-
-        venue1 = Venue(name="The Rock", location=[-87.677137, 41.909889])
-        venue2 = Venue(name="The Bridge", location=[-122.4194155, 37.7749295])
-
-        event1 = Event(title="Coltrane Motion @ Double Door",
-                       venue=venue1).save()
-        event2 = Event(title="Coltrane Motion @ Bottom of the Hill",
-                       venue=venue2).save()
-        event3 = Event(title="Coltrane Motion @ Empty Bottle",
-                       venue=venue1).save()
-
-        # find all events "near" pitchfork office, chicago.
-        # note that "near" will show the san francisco event, too,
-        # although it sorts to last.
-        events = Event.objects(venue__location__near=[-87.67892, 41.9120459])
-        self.assertEqual(events.count(), 3)
-        self.assertEqual(list(events), [event1, event3, event2])
-
     def test_linestring(self):
-
         class Road(Document):
             name = StringField()
             line = LineStringField()
@@ -410,7 +456,6 @@ class GeoQueriesTest(unittest.TestCase):
         self.assertEqual(1, roads)
 
     def test_polygon(self):
-
         class Road(Document):
             name = StringField()
             poly = PolygonField()
@@ -465,6 +510,24 @@ class GeoQueriesTest(unittest.TestCase):
         roads = Road.objects.filter(poly__geo_intersects={"$geometry": polygon}).count()
         self.assertEqual(1, roads)
 
+    def test_aspymongo_with_only(self):
+        """Ensure as_pymongo works with only"""
+        class Place(Document):
+            location = PointField()
+
+        Place.drop_collection()
+        p = Place(location=[24.946861267089844, 60.16311983618494])
+        p.save()
+        qs = Place.objects().only('location')
+        self.assertDictEqual(
+            qs.as_pymongo()[0]['location'],
+            {u'type': u'Point',
+             u'coordinates': [
+                24.946861267089844,
+                60.16311983618494]
+            }
+        )
+
     def test_2dsphere_point_sets_correctly(self):
         class Location(Document):
             loc = PointField()
@@ -507,5 +570,6 @@ class GeoQueriesTest(unittest.TestCase):
         loc = Location.objects.as_pymongo()[0]
         self.assertEqual(loc["poly"], {"type": "Polygon", "coordinates": [[[40, 4], [40, 6], [41, 6], [40, 4]]]})
 
+
 if __name__ == '__main__':
     unittest.main()

tests/queryset/modify.py

@@ -1,6 +1,8 @@
 import unittest
 
-from mongoengine import connect, Document, IntField
+from mongoengine import connect, Document, IntField, StringField, ListField
+
+from tests.utils import needs_mongodb_v26
 
 __all__ = ("FindAndModifyTest",)
 
@@ -94,6 +96,37 @@ class FindAndModifyTest(unittest.TestCase):
         self.assertEqual(old_doc.to_mongo(), {"_id": 1})
         self.assertDbEqual([{"_id": 0, "value": 0}, {"_id": 1, "value": -1}])
 
+    @needs_mongodb_v26
+    def test_modify_with_push(self):
+        class BlogPost(Document):
+            tags = ListField(StringField())
+
+        BlogPost.drop_collection()
+
+        blog = BlogPost.objects.create()
+
+        # Push a new tag via modify with new=False (default).
+        BlogPost(id=blog.id).modify(push__tags='code')
+        self.assertEqual(blog.tags, [])
+        blog.reload()
+        self.assertEqual(blog.tags, ['code'])
+
+        # Push a new tag via modify with new=True.
+        blog = BlogPost.objects(id=blog.id).modify(push__tags='java', new=True)
+        self.assertEqual(blog.tags, ['code', 'java'])
+
+        # Push a new tag with a positional argument.
+        blog = BlogPost.objects(id=blog.id).modify(
+            push__tags__0='python',
+            new=True)
+        self.assertEqual(blog.tags, ['python', 'code', 'java'])
+
+        # Push multiple new tags with a positional argument.
+        blog = BlogPost.objects(id=blog.id).modify(
+            push__tags__1=['go', 'rust'],
+            new=True)
+        self.assertEqual(blog.tags, ['python', 'go', 'rust', 'code', 'java'])
+
 
 if __name__ == '__main__':
     unittest.main()

tests/queryset/queryset.py

@@ -19,6 +19,9 @@ from mongoengine.python_support import IS_PYMONGO_3
 from mongoengine.queryset import (DoesNotExist, MultipleObjectsReturned,
                                   QuerySet, QuerySetManager, queryset_manager)
 
+from tests.utils import needs_mongodb_v26, skip_pymongo3
+
+
 __all__ = ("QuerySetTest",)
 
 
@@ -32,37 +35,6 @@ class db_ops_tracker(query_counter):
         return list(self.db.system.profile.find(ignore_query))
 
 
-def skip_older_mongodb(f):
-    def _inner(*args, **kwargs):
-        connection = get_connection()
-        info = connection.test.command('buildInfo')
-        mongodb_version = tuple([int(i) for i in info['version'].split('.')])
-
-        if mongodb_version < (2, 6):
-            raise SkipTest("Need MongoDB version 2.6+")
-
-        return f(*args, **kwargs)
-
-    _inner.__name__ = f.__name__
-    _inner.__doc__ = f.__doc__
-
-    return _inner
-
-
-def skip_pymongo3(f):
-    def _inner(*args, **kwargs):
-
-        if IS_PYMONGO_3:
-            raise SkipTest("Useless with PyMongo 3+")
-
-        return f(*args, **kwargs)
-
-    _inner.__name__ = f.__name__
-    _inner.__doc__ = f.__doc__
-
-    return _inner
-
-
 class QuerySetTest(unittest.TestCase):
 
     def setUp(self):
@@ -106,58 +78,111 @@ class QuerySetTest(unittest.TestCase):
             list(BlogPost.objects(author2__name="test"))
 
     def test_find(self):
-        """Ensure that a query returns a valid set of results.
-        """
-        self.Person(name="User A", age=20).save()
-        self.Person(name="User B", age=30).save()
+        """Ensure that a query returns a valid set of results."""
+        user_a = self.Person.objects.create(name='User A', age=20)
+        user_b = self.Person.objects.create(name='User B', age=30)
 
         # Find all people in the collection
         people = self.Person.objects
         self.assertEqual(people.count(), 2)
         results = list(people)
+
         self.assertTrue(isinstance(results[0], self.Person))
         self.assertTrue(isinstance(results[0].id, (ObjectId, str, unicode)))
-        self.assertEqual(results[0].name, "User A")
+
+        self.assertEqual(results[0], user_a)
+        self.assertEqual(results[0].name, 'User A')
         self.assertEqual(results[0].age, 20)
-        self.assertEqual(results[1].name, "User B")
+
+        self.assertEqual(results[1], user_b)
+        self.assertEqual(results[1].name, 'User B')
         self.assertEqual(results[1].age, 30)
 
-        # Use a query to filter the people found to just person1
+        # Filter people by age
         people = self.Person.objects(age=20)
         self.assertEqual(people.count(), 1)
         person = people.next()
+        self.assertEqual(person, user_a)
         self.assertEqual(person.name, "User A")
         self.assertEqual(person.age, 20)
 
-        # Test limit
+    def test_limit(self):
+        """Ensure that QuerySet.limit works as expected."""
+        user_a = self.Person.objects.create(name='User A', age=20)
+        user_b = self.Person.objects.create(name='User B', age=30)
+
+        # Test limit on a new queryset
         people = list(self.Person.objects.limit(1))
         self.assertEqual(len(people), 1)
-        self.assertEqual(people[0].name, 'User A')
+        self.assertEqual(people[0], user_a)
 
-        # Test skip
+        # Test limit on an existing queryset
+        people = self.Person.objects
+        self.assertEqual(len(people), 2)
+        people2 = people.limit(1)
+        self.assertEqual(len(people), 2)
+        self.assertEqual(len(people2), 1)
+        self.assertEqual(people2[0], user_a)
+
+        # Test chaining of only after limit
+        person = self.Person.objects().limit(1).only('name').first()
+        self.assertEqual(person, user_a)
+        self.assertEqual(person.name, 'User A')
+        self.assertEqual(person.age, None)
+
+    def test_skip(self):
+        """Ensure that QuerySet.skip works as expected."""
+        user_a = self.Person.objects.create(name='User A', age=20)
+        user_b = self.Person.objects.create(name='User B', age=30)
+
+        # Test skip on a new queryset
         people = list(self.Person.objects.skip(1))
         self.assertEqual(len(people), 1)
-        self.assertEqual(people[0].name, 'User B')
+        self.assertEqual(people[0], user_b)
 
-        person3 = self.Person(name="User C", age=40)
-        person3.save()
+        # Test skip on an existing queryset
+        people = self.Person.objects
+        self.assertEqual(len(people), 2)
+        people2 = people.skip(1)
+        self.assertEqual(len(people), 2)
+        self.assertEqual(len(people2), 1)
+        self.assertEqual(people2[0], user_b)
+
+        # Test chaining of only after skip
+        person = self.Person.objects().skip(1).only('name').first()
+        self.assertEqual(person, user_b)
+        self.assertEqual(person.name, 'User B')
+        self.assertEqual(person.age, None)
+
+    def test_slice(self):
+        """Ensure slicing a queryset works as expected."""
+        user_a = self.Person.objects.create(name='User A', age=20)
+        user_b = self.Person.objects.create(name='User B', age=30)
+        user_c = self.Person.objects.create(name="User C", age=40)
 
         # 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')
+        self.assertEqual(people[0], user_a)
+        self.assertEqual(people[1], 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')
+        self.assertEqual(people[0], user_b)
+        self.assertEqual(people[1], 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')
+        self.assertEqual(people[0], user_b)
+
+        # Test slice limit and skip on an existing queryset
+        people = self.Person.objects
+        self.assertEqual(len(people), 3)
+        people2 = people[1:2]
+        self.assertEqual(len(people2), 1)
+        self.assertEqual(people2[0], user_b)
 
         # Test slice limit and skip cursor reset
         qs = self.Person.objects[1:2]
@@ -168,6 +193,7 @@ class QuerySetTest(unittest.TestCase):
         self.assertEqual(len(people), 1)
         self.assertEqual(people[0].name, 'User B')
 
+        # Test empty slice
         people = list(self.Person.objects[1:1])
         self.assertEqual(len(people), 0)
 
@@ -187,12 +213,6 @@ class QuerySetTest(unittest.TestCase):
         self.assertEqual("[<Person: Person object>, <Person: Person object>]",
                          "%s" % self.Person.objects[51:53])
 
-        # Test only after limit
-        self.assertEqual(self.Person.objects().limit(2).only('name')[0].age, None)
-
-        # Test only after skip
-        self.assertEqual(self.Person.objects().skip(2).only('name')[0].age, None)
-
     def test_find_one(self):
         """Ensure that a query using find_one returns a valid result.
         """
@@ -551,16 +571,23 @@ class QuerySetTest(unittest.TestCase):
         self.assertEqual(post.comments[0].by, 'joe')
         self.assertEqual(post.comments[0].votes.score, 4)
 
+    @needs_mongodb_v26
     def test_update_min_max(self):
         class Scores(Document):
             high_score = IntField()
             low_score = IntField()
-        scores = Scores(high_score=800, low_score=200)
-        scores.save()
+
+        scores = Scores.objects.create(high_score=800, low_score=200)
+
         Scores.objects(id=scores.id).update(min__low_score=150)
-        self.assertEqual(Scores.objects(id=scores.id).get().low_score, 150)
+        self.assertEqual(Scores.objects.get(id=scores.id).low_score, 150)
         Scores.objects(id=scores.id).update(min__low_score=250)
-        self.assertEqual(Scores.objects(id=scores.id).get().low_score, 150)
+        self.assertEqual(Scores.objects.get(id=scores.id).low_score, 150)
+
+        Scores.objects(id=scores.id).update(max__high_score=1000)
+        self.assertEqual(Scores.objects.get(id=scores.id).high_score, 1000)
+        Scores.objects(id=scores.id).update(max__high_score=500)
+        self.assertEqual(Scores.objects.get(id=scores.id).high_score, 1000)
 
     def test_updates_can_have_match_operators(self):
 
@@ -890,7 +917,9 @@ class QuerySetTest(unittest.TestCase):
         self.assertEqual(Blog.objects.count(), 3)
 
     def test_get_changed_fields_query_count(self):
-
+        """Make sure we don't perform unnecessary db operations when
+        none of document's fields were updated.
+        """
         class Person(Document):
             name = StringField()
             owns = ListField(ReferenceField('Organization'))
@@ -898,8 +927,8 @@ class QuerySetTest(unittest.TestCase):
 
         class Organization(Document):
             name = StringField()
-            owner = ReferenceField('Person')
-            employees = ListField(ReferenceField('Person'))
+            owner = ReferenceField(Person)
+            employees = ListField(ReferenceField(Person))
 
         class Project(Document):
             name = StringField()
@@ -918,35 +947,35 @@ class QuerySetTest(unittest.TestCase):
         with query_counter() as q:
             self.assertEqual(q, 0)
 
-            fresh_o1 = Organization.objects.get(id=o1.id)
-            self.assertEqual(1, q)
-            fresh_o1._get_changed_fields()
-            self.assertEqual(1, q)
-
-        with query_counter() as q:
-            self.assertEqual(q, 0)
-
-            fresh_o1 = Organization.objects.get(id=o1.id)
-            fresh_o1.save()   # No changes, does nothing
-
+            # Fetching a document should result in a query.
+            org = Organization.objects.get(id=o1.id)
             self.assertEqual(q, 1)
 
-        with query_counter() as q:
-            self.assertEqual(q, 0)
-
-            fresh_o1 = Organization.objects.get(id=o1.id)
-            fresh_o1.save(cascade=False)  # No changes, does nothing
-
+            # Checking changed fields of a newly fetched document should not
+            # result in a query.
+            org._get_changed_fields()
             self.assertEqual(q, 1)
 
+        # Saving a doc without changing any of its fields should not result
+        # in a query (with or without cascade=False).
+        org = Organization.objects.get(id=o1.id)
         with query_counter() as q:
+            org.save()
             self.assertEqual(q, 0)
 
-            fresh_o1 = Organization.objects.get(id=o1.id)
-            fresh_o1.employees.append(p2)  # Dereferences
-            fresh_o1.save(cascade=False)   # Saves
+        org = Organization.objects.get(id=o1.id)
+        with query_counter() as q:
+            org.save(cascade=False)
+            self.assertEqual(q, 0)
 
-            self.assertEqual(q, 3)
+        # Saving a doc after you append a reference to it should result in
+        # two db operations (a query for the reference and an update).
+        # TODO dereferencing of p2 shouldn't be necessary.
+        org = Organization.objects.get(id=o1.id)
+        with query_counter() as q:
+            org.employees.append(p2)  # dereferences p2
+            org.save()  # saves the org
+            self.assertEqual(q, 2)
 
     @skip_pymongo3
     def test_slave_okay(self):
@@ -964,7 +993,7 @@ class QuerySetTest(unittest.TestCase):
         self.assertEqual(person.name, "User A")
         self.assertEqual(person.age, 20)
 
-    @skip_older_mongodb
+    @needs_mongodb_v26
     @skip_pymongo3
     def test_cursor_args(self):
         """Ensures the cursor args can be set as expected
@@ -1226,6 +1255,7 @@ class QuerySetTest(unittest.TestCase):
 
         BlogPost.drop_collection()
 
+        # default ordering should be used by default
         with db_ops_tracker() as q:
             BlogPost.objects.filter(title='whatever').first()
             self.assertEqual(len(q.get_ops()), 1)
@@ -1234,11 +1264,28 @@ class QuerySetTest(unittest.TestCase):
                 {'published_date': -1}
             )
 
+        # calling order_by() should clear the default ordering
         with db_ops_tracker() as q:
             BlogPost.objects.filter(title='whatever').order_by().first()
             self.assertEqual(len(q.get_ops()), 1)
             self.assertFalse('$orderby' in q.get_ops()[0]['query'])
 
+        # calling an explicit order_by should use a specified sort
+        with db_ops_tracker() as q:
+            BlogPost.objects.filter(title='whatever').order_by('published_date').first()
+            self.assertEqual(len(q.get_ops()), 1)
+            self.assertEqual(
+                q.get_ops()[0]['query']['$orderby'],
+                {'published_date': 1}
+            )
+
+        # calling order_by() after an explicit sort should clear it
+        with db_ops_tracker() as q:
+            qs = BlogPost.objects.filter(title='whatever').order_by('published_date')
+            qs.order_by().first()
+            self.assertEqual(len(q.get_ops()), 1)
+            self.assertFalse('$orderby' in q.get_ops()[0]['query'])
+
     def test_no_ordering_for_get(self):
         """ Ensure that Doc.objects.get doesn't use any ordering.
         """
@@ -1266,7 +1313,7 @@ class QuerySetTest(unittest.TestCase):
 
     def test_find_embedded(self):
         """Ensure that an embedded document is properly returned from
-        a query.
+        different manners of querying.
         """
         class User(EmbeddedDocument):
             name = StringField()
@@ -1277,8 +1324,9 @@ class QuerySetTest(unittest.TestCase):
 
         BlogPost.drop_collection()
 
+        user = User(name='Test User')
         BlogPost.objects.create(
-            author=User(name='Test User'),
+            author=user,
             content='Had a good coffee today...'
         )
 
@@ -1286,6 +1334,19 @@ class QuerySetTest(unittest.TestCase):
         self.assertTrue(isinstance(result.author, User))
         self.assertEqual(result.author.name, 'Test User')
 
+        result = BlogPost.objects.get(author__name=user.name)
+        self.assertTrue(isinstance(result.author, User))
+        self.assertEqual(result.author.name, 'Test User')
+
+        result = BlogPost.objects.get(author={'name': user.name})
+        self.assertTrue(isinstance(result.author, User))
+        self.assertEqual(result.author.name, 'Test User')
+
+        # Fails, since the string is not a type that is able to represent the
+        # author's document structure (should be dict)
+        with self.assertRaises(InvalidQueryError):
+            BlogPost.objects.get(author=user.name)
+
     def test_find_empty_embedded(self):
         """Ensure that you can save and find an empty embedded document."""
         class User(EmbeddedDocument):
@@ -1812,6 +1873,11 @@ class QuerySetTest(unittest.TestCase):
         post.reload()
         self.assertEqual(post.hits, 10)
 
+        # Negative dec operator is equal to a positive inc operator
+        BlogPost.objects.update_one(dec__hits=-1)
+        post.reload()
+        self.assertEqual(post.hits, 11)
+
         BlogPost.objects.update(push__tags='mongo')
         post.reload()
         self.assertTrue('mongo' in post.tags)
@@ -1837,6 +1903,32 @@ class QuerySetTest(unittest.TestCase):
 
         BlogPost.drop_collection()
 
+    @needs_mongodb_v26
+    def test_update_push_with_position(self):
+        """Ensure that the 'push' update with position works properly.
+        """
+        class BlogPost(Document):
+            slug = StringField()
+            tags = ListField(StringField())
+
+        BlogPost.drop_collection()
+
+        post = BlogPost.objects.create(slug="test")
+
+        BlogPost.objects.filter(id=post.id).update(push__tags="code")
+        BlogPost.objects.filter(id=post.id).update(push__tags__0=["mongodb", "python"])
+        post.reload()
+        self.assertEqual(post.tags, ['mongodb', 'python', 'code'])
+
+        BlogPost.objects.filter(id=post.id).update(set__tags__2="java")
+        post.reload()
+        self.assertEqual(post.tags, ['mongodb', 'python', 'java'])
+
+        #test push with singular value
+        BlogPost.objects.filter(id=post.id).update(push__tags__0='scala')
+        post.reload()
+        self.assertEqual(post.tags, ['scala', 'mongodb', 'python', 'java'])
+
     def test_update_push_and_pull_add_to_set(self):
         """Ensure that the 'pull' update operation works correctly.
         """
@@ -3044,7 +3136,7 @@ class QuerySetTest(unittest.TestCase):
 
         self.assertEqual(Foo.objects.distinct("bar"), [bar])
 
-    @skip_older_mongodb
+    @needs_mongodb_v26
     def test_text_indexes(self):
         class News(Document):
             title = StringField()
@@ -3131,7 +3223,7 @@ class QuerySetTest(unittest.TestCase):
             'brasil').order_by('$text_score').first()
         self.assertEqual(item.get_text_score(), max_text_score)
 
-    @skip_older_mongodb
+    @needs_mongodb_v26
     def test_distinct_handles_references_to_alias(self):
         register_connection('testdb', 'mongoenginetest2')
 
@@ -3981,6 +4073,35 @@ class QuerySetTest(unittest.TestCase):
         plist = list(Person.objects.scalar('name', 'state'))
         self.assertEqual(plist, [(u'Wilson JR', s1)])
 
+    def test_generic_reference_field_with_only_and_as_pymongo(self):
+        class TestPerson(Document):
+            name = StringField()
+
+        class TestActivity(Document):
+            name = StringField()
+            owner = GenericReferenceField()
+
+        TestPerson.drop_collection()
+        TestActivity.drop_collection()
+
+        person = TestPerson(name='owner')
+        person.save()
+
+        a1 = TestActivity(name='a1', owner=person)
+        a1.save()
+
+        activity = TestActivity.objects(owner=person).scalar('id', 'owner').no_dereference().first()
+        self.assertEqual(activity[0], a1.pk)
+        self.assertEqual(activity[1]['_ref'], DBRef('test_person', person.pk))
+
+        activity = TestActivity.objects(owner=person).only('id', 'owner')[0]
+        self.assertEqual(activity.pk, a1.pk)
+        self.assertEqual(activity.owner, person)
+
+        activity = TestActivity.objects(owner=person).only('id', 'owner').as_pymongo().first()
+        self.assertEqual(activity['_id'], a1.pk)
+        self.assertTrue(activity['owner']['_ref'], DBRef('test_person', person.pk))
+
     def test_scalar_db_field(self):
 
         class TestDoc(Document):
@@ -4326,21 +4447,44 @@ class QuerySetTest(unittest.TestCase):
         self.assertEqual(doc_objects, Doc.objects.from_json(json_data))
 
     def test_as_pymongo(self):
-
         from decimal import Decimal
 
+        class LastLogin(EmbeddedDocument):
+            location = StringField()
+            ip = StringField()
+
         class User(Document):
             id = ObjectIdField('_id')
             name = StringField()
             age = IntField()
             price = DecimalField()
+            last_login = EmbeddedDocumentField(LastLogin)
 
         User.drop_collection()
-        User(name="Bob Dole", age=89, price=Decimal('1.11')).save()
-        User(name="Barack Obama", age=51, price=Decimal('2.22')).save()
+
+        User.objects.create(name="Bob Dole", age=89, price=Decimal('1.11'))
+        User.objects.create(
+            name="Barack Obama",
+            age=51,
+            price=Decimal('2.22'),
+            last_login=LastLogin(
+                location='White House',
+                ip='104.107.108.116'
+            )
+        )
+
+        results = User.objects.as_pymongo()
+        self.assertEqual(
+            set(results[0].keys()),
+            set(['_id', 'name', 'age', 'price'])
+        )
+        self.assertEqual(
+            set(results[1].keys()),
+            set(['_id', 'name', 'age', 'price', 'last_login'])
+        )
 
         results = User.objects.only('id', 'name').as_pymongo()
-        self.assertEqual(sorted(results[0].keys()), sorted(['_id', 'name']))
+        self.assertEqual(set(results[0].keys()), set(['_id', 'name']))
 
         users = User.objects.only('name', 'price').as_pymongo()
         results = list(users)
@@ -4351,16 +4495,20 @@ class QuerySetTest(unittest.TestCase):
         self.assertEqual(results[1]['name'], 'Barack Obama')
         self.assertEqual(results[1]['price'], 2.22)
 
-        # Test coerce_types
-        users = User.objects.only(
-            'name', 'price').as_pymongo(coerce_types=True)
+        users = User.objects.only('name', 'last_login').as_pymongo()
         results = list(users)
         self.assertTrue(isinstance(results[0], dict))
         self.assertTrue(isinstance(results[1], dict))
-        self.assertEqual(results[0]['name'], 'Bob Dole')
-        self.assertEqual(results[0]['price'], Decimal('1.11'))
-        self.assertEqual(results[1]['name'], 'Barack Obama')
-        self.assertEqual(results[1]['price'], Decimal('2.22'))
+        self.assertEqual(results[0], {
+            'name': 'Bob Dole'
+        })
+        self.assertEqual(results[1], {
+            'name': 'Barack Obama',
+            'last_login': {
+                'location': 'White House',
+                'ip': '104.107.108.116'
+            }
+        })
 
     def test_as_pymongo_json_limit_fields(self):
 
@@ -4524,7 +4672,6 @@ class QuerySetTest(unittest.TestCase):
 
     def test_no_cache(self):
         """Ensure you can add meta data to file"""
-
         class Noddy(Document):
             fields = DictField()
 
@@ -4542,15 +4689,19 @@ class QuerySetTest(unittest.TestCase):
 
         self.assertEqual(len(list(docs)), 100)
 
+        # Can't directly get a length of a no-cache queryset.
         with self.assertRaises(TypeError):
             len(docs)
 
+        # Another iteration over the queryset should result in another db op.
         with query_counter() as q:
-            self.assertEqual(q, 0)
             list(docs)
             self.assertEqual(q, 1)
+
+        # ... and another one to double-check.
+        with query_counter() as q:
             list(docs)
-            self.assertEqual(q, 2)
+            self.assertEqual(q, 1)
 
     def test_nested_queryset_iterator(self):
         # Try iterating the same queryset twice, nested.
@@ -4806,6 +4957,7 @@ class QuerySetTest(unittest.TestCase):
             self.assertTrue(Person.objects._has_data(),
                             'Cursor has data and returned False')
 
+    @needs_mongodb_v26
     def test_queryset_aggregation_framework(self):
         class Person(Document):
             name = StringField()
@@ -4840,17 +4992,13 @@ class QuerySetTest(unittest.TestCase):
             {'_id': p1.pk, 'name': "ISABELLA LUANNA"}
         ])
 
-        data = Person.objects(
-            age__gte=17, age__lte=40).order_by('-age').aggregate(
-                {'$group': {
-                    '_id': None,
-                    'total': {'$sum': 1},
-                    'avg': {'$avg': '$age'}
-                }
-                }
-
-        )
-
+        data = Person.objects(age__gte=17, age__lte=40).order_by('-age').aggregate({
+            '$group': {
+                '_id': None,
+                'total': {'$sum': 1},
+                'avg': {'$avg': '$age'}
+            }
+        })
         self.assertEqual(list(data), [
             {'_id': None, 'avg': 29, 'total': 2}
         ])
@@ -4891,28 +5039,16 @@ class QuerySetTest(unittest.TestCase):
         self.assertEquals(Animal.objects(folded_ears=True).count(), 1)
         self.assertEquals(Animal.objects(whiskers_length=5.1).count(), 1)
 
-    def test_loop_via_invalid_id_does_not_crash(self):
+    def test_loop_over_invalid_id_does_not_crash(self):
         class Person(Document):
             name = StringField()
-        Person.objects.delete()
-        Person._get_collection().update({"name": "a"}, {"$set": {"_id": ""}}, upsert=True)
+
+        Person.drop_collection()
+
+        Person._get_collection().insert({'name': 'a', 'id': ''})
         for p in Person.objects():
             self.assertEqual(p.name, 'a')
 
-    def test_last_field_name_like_operator(self):
-        class EmbeddedItem(EmbeddedDocument):
-            type = StringField()
-
-        class Doc(Document):
-            item = EmbeddedDocumentField(EmbeddedItem)
-
-        Doc.drop_collection()
-
-        doc = Doc(item=EmbeddedItem(type="axe"))
-        doc.save()
-
-        self.assertEqual(1, Doc.objects(item__type__="axe").count())
-
     def test_len_during_iteration(self):
         """Tests that calling len on a queyset during iteration doesn't
         stop paging.
@@ -4963,6 +5099,35 @@ class QuerySetTest(unittest.TestCase):
         self.assertEqual(i, 249)
         self.assertEqual(j, 249)
 
+    def test_in_operator_on_non_iterable(self):
+        """Ensure that using the `__in` operator on a non-iterable raises an
+        error.
+        """
+        class User(Document):
+            name = StringField()
+
+        class BlogPost(Document):
+            content = StringField()
+            authors = ListField(ReferenceField(User))
+
+        User.drop_collection()
+        BlogPost.drop_collection()
+
+        author = User.objects.create(name='Test User')
+        post = BlogPost.objects.create(content='Had a good coffee today...',
+                                       authors=[author])
+
+        # Make sure using `__in` with a list works
+        blog_posts = BlogPost.objects(authors__in=[author])
+        self.assertEqual(list(blog_posts), [post])
+
+        # Using `__in` with a non-iterable should raise a TypeError
+        self.assertRaises(TypeError, BlogPost.objects(authors__in=author.pk).count)
+
+        # Using `__in` with a `Document` (which is seemingly iterable but not
+        # in a way we'd expect) should raise a TypeError, too
+        self.assertRaises(TypeError, BlogPost.objects(authors__in=author).count)
+
 
 if __name__ == '__main__':
     unittest.main()

tests/test_connection.py

@@ -35,8 +35,7 @@ class ConnectionTest(unittest.TestCase):
         mongoengine.connection._dbs = {}
 
     def test_connect(self):
-        """Ensure that the connect() method works properly.
-        """
+        """Ensure that the connect() method works properly."""
         connect('mongoenginetest')
 
         conn = get_connection()
@@ -146,8 +145,7 @@ class ConnectionTest(unittest.TestCase):
         self.assertEqual(expected_connection, actual_connection)
 
     def test_connect_uri(self):
-        """Ensure that the connect() method works properly with uri's
-        """
+        """Ensure that the connect() method works properly with URIs."""
         c = connect(db='mongoenginetest', alias='admin')
         c.admin.system.users.remove({})
         c.mongoenginetest.system.users.remove({})
@@ -214,9 +212,8 @@ class ConnectionTest(unittest.TestCase):
         self.assertRaises(OperationFailure, get_db)
 
     def test_connect_uri_with_authsource(self):
-        """Ensure that the connect() method works well with
-        the option `authSource` in URI.
-        This feature was introduced in MongoDB 2.4 and removed in 2.6
+        """Ensure that the connect() method works well with `authSource`
+        option in the URI.
         """
         # Create users
         c = connect('mongoenginetest')
@@ -225,30 +222,31 @@ class ConnectionTest(unittest.TestCase):
 
         # Authentication fails without "authSource"
         if IS_PYMONGO_3:
-            test_conn = connect('mongoenginetest', alias='test1',
-                                host='mongodb://username2:password@localhost/mongoenginetest')
+            test_conn = connect(
+                'mongoenginetest', alias='test1',
+                host='mongodb://username2:password@localhost/mongoenginetest'
+            )
             self.assertRaises(OperationFailure, test_conn.server_info)
         else:
             self.assertRaises(
-                MongoEngineConnectionError, connect, 'mongoenginetest',
-                alias='test1',
+                MongoEngineConnectionError,
+                connect, 'mongoenginetest', alias='test1',
                 host='mongodb://username2:password@localhost/mongoenginetest'
             )
             self.assertRaises(MongoEngineConnectionError, get_db, 'test1')
 
         # Authentication succeeds with "authSource"
-        connect(
+        authd_conn = connect(
             'mongoenginetest', alias='test2',
             host=('mongodb://username2:password@localhost/'
                   'mongoenginetest?authSource=admin')
         )
-        # This will fail starting from MongoDB 2.6+
         db = get_db('test2')
         self.assertTrue(isinstance(db, pymongo.database.Database))
         self.assertEqual(db.name, 'mongoenginetest')
 
         # Clear all users
-        c.admin.system.users.remove({})
+        authd_conn.admin.system.users.remove({})
 
     def test_register_connection(self):
         """Ensure that connections with different aliases may be registered.
@@ -272,8 +270,7 @@ class ConnectionTest(unittest.TestCase):
         self.assertTrue(isinstance(conn, pymongo.mongo_client.MongoClient))
 
     def test_connection_kwargs(self):
-        """Ensure that connection kwargs get passed to pymongo.
-        """
+        """Ensure that connection kwargs get passed to pymongo."""
         connect('mongoenginetest', alias='t1', tz_aware=True)
         conn = get_connection('t1')
 
@@ -283,6 +280,77 @@ class ConnectionTest(unittest.TestCase):
         conn = get_connection('t2')
         self.assertFalse(get_tz_awareness(conn))
 
+    def test_connection_pool_via_kwarg(self):
+        """Ensure we can specify a max connection pool size using
+        a connection kwarg.
+        """
+        # Use "max_pool_size" or "maxpoolsize" depending on PyMongo version
+        # (former was changed to the latter as described in
+        # https://jira.mongodb.org/browse/PYTHON-854).
+        # TODO remove once PyMongo < 3.0 support is dropped
+        if pymongo.version_tuple[0] >= 3:
+            pool_size_kwargs = {'maxpoolsize': 100}
+        else:
+            pool_size_kwargs = {'max_pool_size': 100}
+
+        conn = connect('mongoenginetest', alias='max_pool_size_via_kwarg', **pool_size_kwargs)
+        self.assertEqual(conn.max_pool_size, 100)
+
+    def test_connection_pool_via_uri(self):
+        """Ensure we can specify a max connection pool size using
+        an option in a connection URI.
+        """
+        if pymongo.version_tuple[0] == 2 and pymongo.version_tuple[1] < 9:
+            raise SkipTest('maxpoolsize as a URI option is only supported in PyMongo v2.9+')
+
+        conn = connect(host='mongodb://localhost/test?maxpoolsize=100', alias='max_pool_size_via_uri')
+        self.assertEqual(conn.max_pool_size, 100)
+
+    def test_write_concern(self):
+        """Ensure write concern can be specified in connect() via
+        a kwarg or as part of the connection URI.
+        """
+        conn1 = connect(alias='conn1', host='mongodb://localhost/testing?w=1&j=true')
+        conn2 = connect('testing', alias='conn2', w=1, j=True)
+        if IS_PYMONGO_3:
+            self.assertEqual(conn1.write_concern.document, {'w': 1, 'j': True})
+            self.assertEqual(conn2.write_concern.document, {'w': 1, 'j': True})
+        else:
+            self.assertEqual(dict(conn1.write_concern), {'w': 1, 'j': True})
+            self.assertEqual(dict(conn2.write_concern), {'w': 1, 'j': True})
+
+    def test_connect_with_replicaset_via_uri(self):
+        """Ensure connect() works when specifying a replicaSet via the
+        MongoDB URI.
+        """
+        if IS_PYMONGO_3:
+            c = connect(host='mongodb://localhost/test?replicaSet=local-rs')
+            db = get_db()
+            self.assertTrue(isinstance(db, pymongo.database.Database))
+            self.assertEqual(db.name, 'test')
+        else:
+            # PyMongo < v3.x raises an exception:
+            # "localhost:27017 is not a member of replica set local-rs"
+            with self.assertRaises(MongoEngineConnectionError):
+                c = connect(host='mongodb://localhost/test?replicaSet=local-rs')
+
+    def test_connect_with_replicaset_via_kwargs(self):
+        """Ensure connect() works when specifying a replicaSet via the
+        connection kwargs
+        """
+        if IS_PYMONGO_3:
+            c = connect(replicaset='local-rs')
+            self.assertEqual(c._MongoClient__options.replica_set_name,
+                             'local-rs')
+            db = get_db()
+            self.assertTrue(isinstance(db, pymongo.database.Database))
+            self.assertEqual(db.name, 'test')
+        else:
+            # PyMongo < v3.x raises an exception:
+            # "localhost:27017 is not a member of replica set local-rs"
+            with self.assertRaises(MongoEngineConnectionError):
+                c = connect(replicaset='local-rs')
+
     def test_datetime(self):
         connect('mongoenginetest', tz_aware=True)
         d = datetime.datetime(2010, 5, 5, tzinfo=utc)

tests/test_datastructures.py

@@ -1,6 +1,6 @@
 import unittest
 
-from mongoengine.base.datastructures import StrictDict, SemiStrictDict
+from mongoengine.base.datastructures import StrictDict
 
 
 class TestStrictDict(unittest.TestCase):
@@ -76,44 +76,5 @@ class TestStrictDict(unittest.TestCase):
         assert dict(**d) == {'a': 1, 'b': 2}
 
 
-class TestSemiSrictDict(TestStrictDict):
-    def strict_dict_class(self, *args, **kwargs):
-        return SemiStrictDict.create(*args, **kwargs)
-
-    def test_init_fails_on_nonexisting_attrs(self):
-        # disable irrelevant test
-        pass
-
-    def test_setattr_raises_on_nonexisting_attr(self):
-        # disable irrelevant test
-        pass
-
-    def test_setattr_getattr_nonexisting_attr_succeeds(self):
-        d = self.dtype()
-        d.x = 1
-        self.assertEqual(d.x, 1)
-
-    def test_init_succeeds_with_nonexisting_attrs(self):
-        d = self.dtype(a=1, b=1, c=1, x=2)
-        self.assertEqual((d.a, d.b, d.c, d.x), (1, 1, 1, 2))
-
-    def test_iter_with_nonexisting_attrs(self):
-        d = self.dtype(a=1, b=1, c=1, x=2)
-        self.assertEqual(list(d), ['a', 'b', 'c', 'x'])
-
-    def test_iteritems_with_nonexisting_attrs(self):
-        d = self.dtype(a=1, b=1, c=1, x=2)
-        self.assertEqual(list(d.iteritems()), [('a', 1), ('b', 1), ('c', 1), ('x', 2)])
-
-    def tets_cmp_with_strict_dicts(self):
-        d = self.dtype(a=1, b=1, c=1)
-        dd = StrictDict.create(("a", "b", "c"))(a=1, b=1, c=1)
-        self.assertEqual(d, dd)
-
-    def test_cmp_with_strict_dict_with_nonexisting_attrs(self):
-        d = self.dtype(a=1, b=1, c=1, x=2)
-        dd = StrictDict.create(("a", "b", "c", "x"))(a=1, b=1, c=1, x=2)
-        self.assertEqual(d, dd)
-
 if __name__ == '__main__':
     unittest.main()

tests/utils.py

@@ -0,0 +1,78 @@
+import unittest
+
+from nose.plugins.skip import SkipTest
+
+from mongoengine import connect
+from mongoengine.connection import get_db, get_connection
+from mongoengine.python_support import IS_PYMONGO_3
+
+
+MONGO_TEST_DB = 'mongoenginetest'
+
+
+class MongoDBTestCase(unittest.TestCase):
+    """Base class for tests that need a mongodb connection
+    db is being dropped automatically
+    """
+
+    @classmethod
+    def setUpClass(cls):
+        cls._connection = connect(db=MONGO_TEST_DB)
+        cls._connection.drop_database(MONGO_TEST_DB)
+        cls.db = get_db()
+
+    @classmethod
+    def tearDownClass(cls):
+        cls._connection.drop_database(MONGO_TEST_DB)
+
+
+def get_mongodb_version():
+    """Return the version tuple of the MongoDB server that the default
+    connection is connected to.
+    """
+    return tuple(get_connection().server_info()['versionArray'])
+
+def _decorated_with_ver_requirement(func, ver_tuple):
+    """Return a given function decorated with the version requirement
+    for a particular MongoDB version tuple.
+    """
+    def _inner(*args, **kwargs):
+        mongodb_ver = get_mongodb_version()
+        if mongodb_ver >= ver_tuple:
+            return func(*args, **kwargs)
+
+        raise SkipTest('Needs MongoDB v{}+'.format(
+            '.'.join([str(v) for v in ver_tuple])
+        ))
+
+    _inner.__name__ = func.__name__
+    _inner.__doc__ = func.__doc__
+
+    return _inner
+
+def needs_mongodb_v26(func):
+    """Raise a SkipTest exception if we're working with MongoDB version
+    lower than v2.6.
+    """
+    return _decorated_with_ver_requirement(func, (2, 6))
+
+def needs_mongodb_v3(func):
+    """Raise a SkipTest exception if we're working with MongoDB version
+    lower than v3.0.
+    """
+    return _decorated_with_ver_requirement(func, (3, 0))
+
+def skip_pymongo3(f):
+    """Raise a SkipTest exception if we're running a test against
+    PyMongo v3.x.
+    """
+    def _inner(*args, **kwargs):
+        if IS_PYMONGO_3:
+            raise SkipTest("Useless with PyMongo 3+")
+        return f(*args, **kwargs)
+
+    _inner.__name__ = f.__name__
+    _inner.__doc__ = f.__doc__
+
+    return _inner
+

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = {py26,py27,py33,py34,py35,pypy,pypy3}-{mg27,mg28},flake8
+envlist = {py27,py35,pypy,pypy3}-{mg27,mg28,mg30}
 
 [testenv]
 commands =
@@ -7,16 +7,7 @@ commands =
 deps =
     nose
     mg27: PyMongo<2.8
-    mg28: PyMongo>=2.8,<3.0
+    mg28: PyMongo>=2.8,<2.9
     mg30: PyMongo>=3.0
-    mgdev: https://github.com/mongodb/mongo-python-driver/tarball/master
 setenv =
     PYTHON_EGG_CACHE = {envdir}/python-eggs
-passenv = windir
-
-[testenv:flake8]
-deps =
-    flake8
-    flake8-import-order
-commands =
-   flake8