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Fixed #12885 -- Fixed queries with GenericRelations to multi-table inheritance child models.

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Anssi Kääriäinen 2015-10-27 13:13:16 +02:00 • committed by Tim Graham
parent 4cd24bb67c
commit cd0ba8053d
2 changed files with 45 additions and 2 deletions
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7
tests/generic_relations/tests.py
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@ -405,6 +405,13 @@ class GenericRelationsTests(TestCase):
# GenericRelations to models that use multi-table inheritance work.
granite = ValuableRock.objects.create(name='granite', hardness=5)
ValuableTaggedItem.objects.create(content_object=granite, tag="countertop", value=1)
self.assertEqual(ValuableRock.objects.filter(tags__value=1).count(), 1)
# We're generating a slightly inefficient query for tags__tag - we
# first join ValuableRock -> TaggedItem -> ValuableTaggedItem, and then
# we fetch tag by joining TaggedItem from ValuableTaggedItem. The last
# join isn't necessary, as TaggedItem <-> ValuableTaggedItem is a
# one-to-one join.
self.assertEqual(ValuableRock.objects.filter(tags__tag="countertop").count(), 1)
granite.delete() # deleting the rock should delete the related tag.
self.assertEqual(ValuableTaggedItem.objects.count(), 0)