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[2.0.x] Fixed #28742 -- Fixed AttributeError crash when assigning None to cached reverse relations.

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Backport of fcfcf8aae4 from master
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Paulo
2017-10-29 12:01:04 +01:00
committed by Tim Graham
parent 1f4e9935ef
commit f2d5417d3b
2 changed files with 13 additions and 7 deletions
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9
tests/one_to_one/tests.py
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@@ -196,6 +196,15 @@ class OneToOneTests(TestCase):
# UndergroundBar.
p.undergroundbar = None
def test_assign_none_to_null_cached_reverse_relation(self):
p = Place.objects.get(name='Demon Dogs')
# Prime the relation's cache with a value of None.
with self.assertRaises(Place.undergroundbar.RelatedObjectDoesNotExist):
getattr(p, 'undergroundbar')
# Assigning None works if there isn't a related UndergroundBar and the
# reverse cache has a value of None.
p.undergroundbar = None
def test_related_object_cache(self):
""" Regression test for #6886 (the related-object cache) """