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Code Issues 32 Releases Wiki Activity

Refs #27718 -- Doc'd and tested QuerySet.exists() for combined querysets.

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Supported since 84c1826ded.
This commit is contained in:
David-Wobrock
2020-11-13 22:34:16 +01:00
committed by Mariusz Felisiak
parent 4cce1d13cf
commit 7b42d34646
2 changed files with 28 additions and 5 deletions
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23
tests/queries/test_qs_combinators.py
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@@ -254,6 +254,29 @@ class QuerySetSetOperationTests(TestCase):
qs2 = Number.objects.filter(num__lte=5)
self.assertEqual(qs1.intersection(qs2).count(), 1)
def test_exists_union(self):
qs1 = Number.objects.filter(num__gte=5)
qs2 = Number.objects.filter(num__lte=5)
self.assertIs(qs1.union(qs2).exists(), True)
def test_exists_union_empty_result(self):
qs = Number.objects.filter(pk__in=[])
self.assertIs(qs.union(qs).exists(), False)
@skipUnlessDBFeature('supports_select_intersection')
def test_exists_intersection(self):
qs1 = Number.objects.filter(num__gt=5)
qs2 = Number.objects.filter(num__lt=5)
self.assertIs(qs1.intersection(qs1).exists(), True)
self.assertIs(qs1.intersection(qs2).exists(), False)
@skipUnlessDBFeature('supports_select_difference')
def test_exists_difference(self):
qs1 = Number.objects.filter(num__gte=5)
qs2 = Number.objects.filter(num__gte=3)
self.assertIs(qs1.difference(qs2).exists(), False)
self.assertIs(qs2.difference(qs1).exists(), True)
def test_get_union(self):
qs = Number.objects.filter(num=2)
self.assertEqual(qs.union(qs).get().num, 2)