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Code Issues 32 Releases Wiki Activity

Fixed #30493 -- Fixed prefetch_related() for GenericRelation with different content types.

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Co-Authored-By: Mariusz Felisiak <felisiak.mariusz@gmail.com>

Thanks Simon Charette for the review.
This commit is contained in:
can
2019-05-29 20:24:37 +03:00
committed by Mariusz Felisiak
parent f66021f3f7
commit dffa3e1992
2 changed files with 38 additions and 9 deletions
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18
tests/generic_relations/tests.py
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@@ -546,6 +546,24 @@ class GenericRelationsTests(TestCase):
platypus.tags.remove(weird_tag)
self.assertSequenceEqual(platypus.tags.all(), [furry_tag])
def test_prefetch_related_different_content_types(self):
TaggedItem.objects.create(content_object=self.platypus, tag='prefetch_tag_1')
TaggedItem.objects.create(
content_object=Vegetable.objects.create(name='Broccoli'),
tag='prefetch_tag_2',
)
TaggedItem.objects.create(
content_object=Animal.objects.create(common_name='Bear'),
tag='prefetch_tag_3',
)
qs = TaggedItem.objects.filter(
tag__startswith='prefetch_tag_',
).prefetch_related('content_object', 'content_object__tags')
with self.assertNumQueries(4):
tags = list(qs)
for tag in tags:
self.assertSequenceEqual(tag.content_object.tags.all(), [tag])
class ProxyRelatedModelTest(TestCase):
def test_default_behavior(self):