diff options
Diffstat (limited to 'tests/annotations/tests.py')
| -rw-r--r-- | tests/annotations/tests.py | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/tests/annotations/tests.py b/tests/annotations/tests.py index bbd35fbd4f..2ed3474f5d 100644 --- a/tests/annotations/tests.py +++ b/tests/annotations/tests.py @@ -10,7 +10,7 @@ from django.db.models import ( Q, Subquery, Sum, Value, When, ) from django.db.models.expressions import RawSQL -from django.db.models.functions import Length, Lower +from django.db.models.functions import ExtractYear, Length, Lower from django.test import TestCase, skipUnlessDBFeature from .models import ( @@ -635,6 +635,25 @@ class NonAggregateAnnotationTestCase(TestCase): datetime.date(2008, 11, 3), ]) + @skipUnlessDBFeature('supports_subqueries_in_group_by') + def test_annotation_subquery_and_aggregate_values_chaining(self): + qs = Book.objects.annotate( + pub_year=ExtractYear('pubdate') + ).values('pub_year').annotate( + top_rating=Subquery( + Book.objects.filter( + pubdate__year=OuterRef('pub_year') + ).order_by('-rating').values('rating')[:1] + ), + total_pages=Sum('pages'), + ).values('pub_year', 'total_pages', 'top_rating') + self.assertCountEqual(qs, [ + {'pub_year': 1991, 'top_rating': 5.0, 'total_pages': 946}, + {'pub_year': 1995, 'top_rating': 4.0, 'total_pages': 1132}, + {'pub_year': 2007, 'top_rating': 4.5, 'total_pages': 447}, + {'pub_year': 2008, 'top_rating': 4.0, 'total_pages': 1178}, + ]) + @skipIf( connection.vendor == 'mysql', 'GROUP BY optimization does not work properly when ONLY_FULL_GROUP_BY ' |