Merge branch 'master' of github.com:MongoEngine/mongoengine into fix_count_documents_deprecation

docs/changelog.rst

@@ -9,10 +9,31 @@ Development
 - When using pymongo >= 3.7, make use of Collection.count_documents instead of Collection.count
     and Cursor.count that got deprecated in pymongo >= 3.7.
     This should have a negative impact on performance of count see Issue #2219
+- Fix a bug that made the queryset drop the read_preference after clone().
+- Fix the behavior of Doc.objects.limit(0) which should return all documents (similar to mongodb) #2311
+
+Changes in 0.20.0
+=================
+- ATTENTION: Drop support for Python2
+- Add Mongo 4.0 to Travis
+- Fix error when setting a string as a ComplexDateTimeField #2253
+- Bump development Status classifier to Production/Stable #2232
+- Improve Queryset.get to avoid confusing MultipleObjectsReturned message in case multiple match are found #630
+- Fixed a bug causing inaccurate query results, while combining ``__raw__`` and regular filters for the same field #2264
+- Add support for the `elemMatch` projection operator in .fields() (e.g BlogPost.objects.fields(elemMatch__comments="test")) #2267
+- DictField validate failed without default connection (bug introduced in 0.19.0) #2239
+- Remove methods that were deprecated years ago:
+    - name parameter in Field constructor e.g `StringField(name="...")`, was replaced by db_field
+    - Queryset.slave_okay() was deprecated since pymongo3
+    - dropDups was dropped with MongoDB3
+    - ``Queryset._ensure_indexes`` and ``Queryset.ensure_indexes``, the right method to use is ``Document.ensure_indexes``
+- Added pre-commit for development/CI #2212
+- Renamed requirements-lint.txt to requirements-dev.txt #2212
+- Support for setting ReadConcern #2255
 
 Changes in 0.19.1
 =================
-- Requires Pillow < 7.0.0 as it dropped Python2 support
+- Tests require Pillow < 7.0.0 as it dropped Python2 support
 - DEPRECATION: The interface of ``QuerySet.aggregate`` method was changed, it no longer takes an unpacked list of
     pipeline steps (*pipeline) but simply takes the pipeline list just like ``pymongo.Collection.aggregate`` does. #2079
 

docs/django.rst

@@ -13,7 +13,7 @@ Help Wanted!
 
 The MongoEngine team is looking for help contributing and maintaining a new
 Django extension for MongoEngine! If you have Django experience and would like
-to help contribute to the project, please get in touch on the 
-`mailing list <http://groups.google.com/group/mongoengine-users>`_ or by 
+to help contribute to the project, please get in touch on the
+`mailing list <http://groups.google.com/group/mongoengine-users>`_ or by
 simply contributing on
 `GitHub <https://github.com/MongoEngine/django-mongoengine>`_.

docs/faq.rst

@@ -10,4 +10,3 @@ If this is a requirement for your project, check the alternative:  `uMongo`_ and
 
 .. _uMongo: https://umongo.readthedocs.io/
 .. _MotorEngine: https://motorengine.readthedocs.io/
-

docs/guide/connecting.rst

@@ -86,7 +86,7 @@ using 3 different databases to store data::
         connect(alias='user-db-alias', db='user-db')
         connect(alias='book-db-alias', db='book-db')
         connect(alias='users-books-db-alias', db='users-books-db')
-        
+
         class User(Document):
             name = StringField()
 

docs/guide/defining-documents.rst

@@ -555,7 +555,6 @@ There are a few top level defaults for all indexes that can be set::
             'index_background': True,
             'index_cls': False,
             'auto_create_index': True,
-            'index_drop_dups': True,
         }
 
 
@@ -574,11 +573,6 @@ There are a few top level defaults for all indexes that can be set::
     in systems where indexes are managed separately. Disabling this will improve
     performance.
 
-:attr:`index_drop_dups` (Optional)
-    Set the default value for if an index should drop duplicates
-    Since MongoDB 3.0 drop_dups is not supported anymore. Raises a Warning
-    and has no effect
-
 
 Compound Indexes and Indexing sub documents
 -------------------------------------------

docs/guide/installing.rst

@@ -12,7 +12,7 @@ MongoEngine is available on PyPI, so you can use :program:`pip`:
 
 .. code-block:: console
 
-    $ pip install mongoengine
+    $ python -m pip install mongoengine
 
 Alternatively, if you don't have setuptools installed, `download it from PyPi
 <http://pypi.python.org/pypi/mongoengine/>`_ and run

docs/guide/signals.rst

@@ -44,8 +44,8 @@ Available signals include:
 
 `post_save`
   Called within :meth:`~mongoengine.Document.save` after most actions
-  (validation, insert/update, and cascades, but not clearing dirty flags) have 
-  completed successfully.  Passed the additional boolean keyword argument 
+  (validation, insert/update, and cascades, but not clearing dirty flags) have
+  completed successfully.  Passed the additional boolean keyword argument
   `created` to indicate if the save was an insert or an update.
 
 `pre_delete`

docs/guide/text-indexes.rst

@@ -8,7 +8,7 @@ After MongoDB 2.4 version, supports search documents by text indexes.
 Defining a Document with text index
 ===================================
 Use the *$* prefix to set a text index, Look the declaration::
-  
+
   class News(Document):
       title = StringField()
       content = StringField()
@@ -35,10 +35,10 @@ Saving a document::
        content="Various improvements").save()
 
 Next, start a text search using :attr:`QuerySet.search_text` method::
-  
+
   document = News.objects.search_text('testing').first()
   document.title # may be: "Using mongodb text search"
-  
+
   document = News.objects.search_text('released').first()
   document.title # may be: "MongoEngine 0.9 released"
 

docs/index.rst

@@ -7,7 +7,7 @@ MongoDB. To install it, simply run
 
 .. code-block:: console
 
-    $ pip install -U mongoengine
+    $ python -m pip install -U mongoengine
 
 :doc:`tutorial`
   A quick tutorial building a tumblelog to get you up and running with
@@ -91,4 +91,3 @@ Indices and tables
 * :ref:`genindex`
 * :ref:`modindex`
 * :ref:`search`
-

docs/tutorial.rst

@@ -18,7 +18,7 @@ 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,
 simply use pip to install it like so::
 
-    $ pip install mongoengine
+    $ python -m 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`

docs/upgrade.rst

@@ -85,10 +85,10 @@ by default from now on.
 
 The 0.8.7 package on pypi was corrupted.  If upgrading from 0.8.7 to 0.9.0 please follow: ::
 
-    pip uninstall pymongo
-    pip uninstall mongoengine
-    pip install pymongo==2.8
-    pip install mongoengine
+    python -m pip uninstall pymongo
+    python -m pip uninstall mongoengine
+    python -m pip install pymongo==2.8
+    python -m pip install mongoengine
 
 0.8.7
 *****
@@ -153,7 +153,7 @@ inherited classes like so: ::
 
     # 4. Remove indexes
     info = collection.index_information()
-    indexes_to_drop = [key for key, value in info.iteritems()
+    indexes_to_drop = [key for key, value in info.items()
                        if '_types' in dict(value['key'])]
     for index in indexes_to_drop:
         collection.drop_index(index)