diff options
Diffstat (limited to 'tests/aggregation')
| -rw-r--r-- | tests/aggregation/tests.py | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/tests/aggregation/tests.py b/tests/aggregation/tests.py index dd30f57bed..f523b3ca35 100644 --- a/tests/aggregation/tests.py +++ b/tests/aggregation/tests.py @@ -1151,6 +1151,20 @@ class AggregateTestCase(TestCase): ) self.assertTrue(publisher_qs.exists()) + def test_aggregation_exists_annotation(self): + published_books = Book.objects.filter(publisher=OuterRef('pk')) + publisher_qs = Publisher.objects.annotate( + published_book=Exists(published_books), + count=Count('book'), + ).values_list('name', flat=True) + self.assertCountEqual(list(publisher_qs), [ + 'Apress', + 'Morgan Kaufmann', + "Jonno's House of Books", + 'Prentice Hall', + 'Sams', + ]) + @skipUnlessDBFeature('supports_subqueries_in_group_by') def test_group_by_subquery_annotation(self): """ |
