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Code Issues 32 Releases Wiki Activity

Fixed #26192 -- Fixed crash of ordering by constants on PostgreSQL.

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Thanks Simon Charette for the review.
This commit is contained in:
Mariusz Felisiak
2019-05-21 20:10:24 +02:00
parent cc80979f01
commit f6075fb333
2 changed files with 33 additions and 8 deletions
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24
tests/ordering/tests.py
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@@ -405,17 +405,35 @@ class OrderingTests(TestCase):
attrgetter("headline")
)
def test_order_by_annotated_constant_value(self):
def test_order_by_constant_value(self):
# Order by annotated constant from selected columns.
qs = Article.objects.annotate(
constant=Value('1', output_field=CharField()),
).order_by('constant', '-headline')
self.assertSequenceEqual(qs, [self.a4, self.a3, self.a2, self.a1])
# Order by annotated constant which is out of selected columns.
self.assertSequenceEqual(
qs.values_list('headline', flat=True), [
'Article 4',
'Article 3',
'Article 2',
'Article 1',
],
)
# Order by constant.
qs = Article.objects.order_by(Value('1', output_field=CharField()), '-headline')
self.assertSequenceEqual(qs, [self.a4, self.a3, self.a2, self.a1])
def test_order_by_constant_value_without_output_field(self):
msg = 'Cannot resolve expression type, unknown output_field'
qs = Article.objects.annotate(constant=Value('1')).order_by('constant')
with self.assertRaisesMessage(FieldError, msg):
qs.first()
for ordered_qs in (
qs,
qs.values('headline'),
Article.objects.order_by(Value('1')),
):
with self.subTest(ordered_qs=ordered_qs), self.assertRaisesMessage(FieldError, msg):
ordered_qs.first()
def test_related_ordering_duplicate_table_reference(self):
"""