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Code Issues 32 Releases Wiki Activity

[3.1.x] Fixed #31773 -- Fixed preserving output_field in ExpressionWrapper for combined expressions.

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Thanks Thodoris Sotiropoulos for the report and Simon Charette for the
implementation idea.

Regression in df32fd42b8.
Backport of 8a6df55f2d from master
This commit is contained in:
Mariusz Felisiak
2020-07-09 11:55:03 +02:00
parent b19372952c
commit e6285cac83
2 changed files with 13 additions and 6 deletions
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12
tests/annotations/tests.py
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@@ -6,8 +6,8 @@ from django.core.exceptions import FieldDoesNotExist, FieldError
from django.db import connection
from django.db.models import (
BooleanField, Case, CharField, Count, DateTimeField, Exists,
ExpressionWrapper, F, Func, IntegerField, Max, NullBooleanField, OuterRef,
Q, Subquery, Sum, Value, When,
ExpressionWrapper, F, FloatField, Func, IntegerField, Max,
NullBooleanField, OuterRef, Q, Subquery, Sum, Value, When,
)
from django.db.models.expressions import RawSQL
from django.db.models.functions import Length, Lower
@@ -178,6 +178,14 @@ class NonAggregateAnnotationTestCase(TestCase):
self.assertEqual(book.combined, 12)
self.assertEqual(book.rating_count, 1)
def test_combined_f_expression_annotation_with_aggregation(self):
book = Book.objects.filter(isbn='159059725').annotate(
combined=ExpressionWrapper(F('price') * F('pages'), output_field=FloatField()),
rating_count=Count('rating'),
).first()
self.assertEqual(book.combined, 13410.0)
self.assertEqual(book.rating_count, 1)
def test_aggregate_over_annotation(self):
agg = Author.objects.annotate(other_age=F('age')).aggregate(otherage_sum=Sum('other_age'))
other_agg = Author.objects.aggregate(age_sum=Sum('age'))