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Fixed #34701 -- Added support for NULLS [NOT] DISTINCT on PostgreSQL 15+.

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This commit is contained in:
Simon Charette
2023-07-07 19:43:51 -04:00
committed by Mariusz Felisiak
parent 98cfb90182
commit 595a2abb58
13 changed files with 295 additions and 9 deletions
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46
tests/invalid_models_tests/test_models.py
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@@ -2753,6 +2753,52 @@ class ConstraintsTests(TestCase):
self.assertEqual(Model.check(databases=self.databases), [])
def test_unique_constraint_nulls_distinct(self):
class Model(models.Model):
name = models.CharField(max_length=10)
class Meta:
constraints = [
models.UniqueConstraint(
fields=["name"],
name="name_uq_distinct_null",
nulls_distinct=True,
),
]
warn = Warning(
f"{connection.display_name} does not support unique constraints with nulls "
"distinct.",
hint=(
"A constraint won't be created. Silence this warning if you don't care "
"about it."
),
obj=Model,
id="models.W047",
)
expected = (
[]
if connection.features.supports_nulls_distinct_unique_constraints
else [warn]
)
self.assertEqual(Model.check(databases=self.databases), expected)
def test_unique_constraint_nulls_distinct_required_db_features(self):
class Model(models.Model):
name = models.CharField(max_length=10)
class Meta:
constraints = [
models.UniqueConstraint(
fields=["name"],
name="name_uq_distinct_null",
nulls_distinct=True,
),
]
required_db_features = {"supports_nulls_distinct_unique_constraints"}
self.assertEqual(Model.check(databases=self.databases), [])
@skipUnlessDBFeature("supports_expression_indexes")
def test_func_unique_constraint_expression_custom_lookup(self):
class Model(models.Model):