Failing test for GenericRelation on an abstract model

When GenericRelation is defined on an abstract model, reverse joins
fail.

Author: gavinwahl

tests/generic_relations_regress/models.py

@@ -6,7 +6,7 @@
 
 __all__ = ('Link', 'Place', 'Restaurant', 'Person', 'Address',
            'CharLink', 'TextLink', 'OddRelation1', 'OddRelation2',
-           'Contact', 'Organization', 'Note', 'Company')
+           'Contact', 'Organization', 'Note', 'Company', 'HasLinkThing')
 
 @python_2_unicode_compatible
 class Link(models.Model):
@@ -122,3 +122,13 @@ class Tag(models.Model):
 
 class Board(models.Model):
     name = models.CharField(primary_key=True, max_length=15)
+
+
+class HasLinks(models.Model):
+    links = generic.GenericRelation(Link)
+
+    class Meta:
+        abstract = True
+
+class HasLinkThing(HasLinks):
+    pass

tests/generic_relations_regress/tests.py

@@ -4,7 +4,7 @@
 
 from .models import (Address, Place, Restaurant, Link, CharLink, TextLink,
     Person, Contact, Note, Organization, OddRelation1, OddRelation2, Company,
-    Developer, Team, Guild, Tag, Board)
+    Developer, Team, Guild, Tag, Board, HasLinkThing)
 
 
 class GenericRelationTests(TestCase):
@@ -135,3 +135,13 @@ def test_gfk_to_model_with_empty_pk(self):
         b1 = Board.objects.create(name='')
         tag = Tag(label='VP', content_object=b1)
         tag.save()
+
+    def test_abstract_reverse_join(self):
+        linked_thing = HasLinkThing.objects.create()
+        link = Link.objects.create(
+            content_object=linked_thing
+        )
+
+        self.assertQuerysetEqual(HasLinkThing.objects.filter(links=link), [
+            "<HasLinkThing: HasLinkThing object>",
+        ])