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Code Issues 32 Releases Wiki Activity

Fixed #20581 -- Added support for deferrable unique constraints.

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This commit is contained in:
Ian Foote
2018-08-27 03:25:06 +01:00
committed by Mariusz Felisiak
parent 555e3a848e
commit c226c6cb32
14 changed files with 457 additions and 16 deletions
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44
tests/invalid_models_tests/test_models.py
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@@ -1414,3 +1414,47 @@ class ConstraintsTests(TestCase):
]
self.assertEqual(Model.check(databases=self.databases), [])
def test_deferrable_unique_constraint(self):
class Model(models.Model):
age = models.IntegerField()
class Meta:
constraints = [
models.UniqueConstraint(
fields=['age'],
name='unique_age_deferrable',
deferrable=models.Deferrable.DEFERRED,
),
]
errors = Model.check(databases=self.databases)
expected = [] if connection.features.supports_deferrable_unique_constraints else [
Warning(
'%s does not support deferrable unique constraints.'
% connection.display_name,
hint=(
"A constraint won't be created. Silence this warning if "
"you don't care about it."
),
obj=Model,
id='models.W038',
),
]
self.assertEqual(errors, expected)
def test_deferrable_unique_constraint_required_db_features(self):
class Model(models.Model):
age = models.IntegerField()
class Meta:
required_db_features = {'supports_deferrable_unique_constraints'}
constraints = [
models.UniqueConstraint(
fields=['age'],
name='unique_age_deferrable',
deferrable=models.Deferrable.IMMEDIATE,
),
]
self.assertEqual(Model.check(databases=self.databases), [])