Refs #26230 -- Removed support for model name query lookups when using Meta.default_related_name.

Per deprecation timeline.

django/db/models/sql/query.py

@@ -7,7 +7,6 @@ databases). The abstraction barrier only works one way: this module has to know
 all about the internals of models in order to get the information it needs.
 """
 import copy
-import warnings
 from collections import Counter, Iterator, Mapping, OrderedDict
 from itertools import chain, count, product
 from string import ascii_uppercase
@@ -32,7 +31,6 @@ from django.db.models.sql.where import (
     AND, OR, ExtraWhere, NothingNode, WhereNode,
 )
 from django.utils import six
-from django.utils.deprecation import RemovedInDjango20Warning
 from django.utils.encoding import force_text
 from django.utils.tree import Node
 
@@ -1320,19 +1318,6 @@ class Query(object):
             except FieldDoesNotExist:
                 if name in self.annotation_select:
                     field = self.annotation_select[name].output_field
-                elif pos == 0:
-                    for rel in opts.related_objects:
-                        if (name == rel.related_model._meta.model_name and
-                                rel.related_name == rel.related_model._meta.default_related_name):
-                            related_name = rel.related_name
-                            field = opts.get_field(related_name)
-                            warnings.warn(
-                                "Query lookup '%s' is deprecated in favor of "
-                                "Meta.default_related_name '%s'."
-                                % (name, related_name),
-                                RemovedInDjango20Warning, 2
-                            )
-                            break
 
             if field is not None:
                 # Fields that contain one-to-many relations with a generic

docs/ref/models/options.txt

@@ -130,30 +130,6 @@ Django quotes column and table names behind the scenes.
     and the name of the model, both lowercased. See the paragraph on
     :ref:`related names for abstract models <abstract-related-name>`.
 
-    .. deprecated:: 1.10
-
-        This attribute now affects ``related_query_name``. The old query lookup
-        name is deprecated::
-
-            from django.db import models
-
-            class Foo(models.Model):
-                pass
-
-            class Bar(models.Model):
-                foo = models.ForeignKey(Foo)
-
-                class Meta:
-                    default_related_name = 'bars'
-
-        ::
-
-            >>> bar = Bar.objects.get(pk=1)
-            >>> # Using model name "bar" as lookup string is deprecated.
-            >>> Foo.objects.get(bar=bar)
-            >>> # You should use default_related_name "bars".
-            >>> Foo.objects.get(bars=bar)
-
 ``get_latest_by``
 -----------------
 

docs/releases/2.0.txt

@@ -350,3 +350,6 @@ these features.
 
 * Support for the ``django.core.files.storage.Storage.accessed_time()``,
   ``created_time()``, and ``modified_time()`` methods is removed.
+
+* Support for query lookups using the model name when
+  ``Meta.default_related_name`` is set is removed.

tests/model_options/test_default_related_name.py

@@ -1,7 +1,5 @@
-import warnings
-
+from django.core.exceptions import FieldError
 from django.test import TestCase
-from django.utils.deprecation import RemovedInDjango20Warning
 
 from .models.default_related_name import Author, Book, Editor
 
@@ -24,15 +22,10 @@ class DefaultRelatedNameTests(TestCase):
     def test_default_related_name_in_queryset_lookup(self):
         self.assertEqual(Author.objects.get(books=self.book), self.author)
 
-    def test_show_deprecated_message_when_model_name_in_queryset_lookup(self):
-        msg = "Query lookup 'book' is deprecated in favor of Meta.default_related_name 'books'."
-        with warnings.catch_warnings(record=True) as warns:
-            warnings.simplefilter('once')
+    def test_model_name_not_available_in_queryset_lookup(self):
+        msg = "Cannot resolve keyword 'book' into field."
+        with self.assertRaisesMessage(FieldError, msg):
             Author.objects.get(book=self.book)
-        self.assertEqual(len(warns), 1)
-        warning = warns.pop()
-        self.assertEqual(warning.category, RemovedInDjango20Warning)
-        self.assertEqual(str(warning.message), msg)
 
     def test_related_name_overrides_default_related_name(self):
         self.assertEqual(list(self.editor.edited_books.all()), [self.book])