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Code Issues 32 Releases Wiki Activity

Fixed #35042 -- Fixed a count() crash on combined queries.

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Regression in 59bea9efd2768102fc9d3aedda469502c218e9b7.

Thanks Marcin for the report.
This commit is contained in:
Simon Charette 2023-12-15 21:00:59 -05:00 committed by Mariusz Felisiak
parent eea4f92f9a
commit 77278929c8
2 changed files with 18 additions and 3 deletions
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6
django/db/models/sql/query.py
View File

@ -520,11 +520,11 @@ class Query(BaseExpression):
self.model._meta.pk.get_col(inner_query.get_initial_alias()),
)
inner_query.default_cols = False
if not qualify:
if not qualify and not self.combinator:
# Mask existing annotations that are not referenced by
# aggregates to be pushed to the outer query unless
# filtering against window functions is involved as it
# requires complex realising.
# filtering against window functions or if the query is
# combined as both would require complex realiasing logic.
annotation_mask = set()
if isinstance(self.group_by, tuple):
for expr in self.group_by:

15
tests/aggregation/tests.py
View File

@ -2344,3 +2344,18 @@ class AggregateAnnotationPruningTests(TestCase):
max_book_author=Max("book__authors"),
).aggregate(count=Count("id", filter=Q(id__in=[F("max_book_author"), 0])))
self.assertEqual(aggregates, {"count": 1})
def test_aggregate_combined_queries(self):
# Combined queries could have members in their values select mask while
# others have them in their annotation mask which makes annotation
# pruning complex to implement hence why it's not implemented.
qs = Author.objects.values(
"age",
other=Value(0),
).union(
Book.objects.values(
age=Value(0),
other=Value(0),
)
)
self.assertEqual(qs.count(), 3)