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Code Issues 25 Releases Wiki Activity

Fixed #26026 -- Fixed isinstance crash comparing EmptyQuerySet to non-QuerySet.

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This commit is contained in:
Anderson Resende 2016-01-05 23:47:27 -03:00 committed by Tim Graham
parent b643386668
commit b5f8c81ce1
2 changed files with 2 additions and 1 deletions
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2
django/db/models/query.py
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@ -1171,7 +1171,7 @@ class QuerySet(object):
class InstanceCheckMeta(type):
def __instancecheck__(self, instance):
return instance.query.is_empty()
return isinstance(instance, QuerySet) and instance.query.is_empty()
class EmptyQuerySet(six.with_metaclass(InstanceCheckMeta)):

1
tests/basic/tests.py
View File

@ -367,6 +367,7 @@ class ModelTest(TestCase):
with self.assertRaises(TypeError):
EmptyQuerySet()
self.assertIsInstance(Article.objects.none(), EmptyQuerySet)
self.assertFalse(isinstance('', EmptyQuerySet))
def test_emptyqs_values(self):
# test for #15959