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Refs #30581 -- Made unattached UniqueConstraint(fields) validation testable.

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The logic allowing UniqueConstraint(fields).validate to preserve backward
compatiblity with Model.unique_error_message failed to account for cases where
the constraint might not be attached to a model which is a common pattern
during testing.

This changes allows for arbitrary UniqueConstraint(fields) to be tested in
isolation without requiring actual models backing them up.

Co-authored-by: Mark G <mark.gensler@protonmail.com>
This commit is contained in:
Simon Charette 2024-07-13 22:09:50 -04:00 • committed by Sarah Boyce
parent 5dc17177c3
commit 13922580cc
2 changed files with 16 additions and 12 deletions
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9
tests/constraints/tests.py
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@ -896,6 +896,13 @@ class UniqueConstraintTests(TestCase):
ChildUniqueConstraintProduct(name=self.p1.name, color=self.p1.color),
)
def test_validate_fields_unattached(self):
Product.objects.create(price=42)
constraint = models.UniqueConstraint(fields=["price"], name="uniq_prices")
msg = "Product with this Price already exists."
with self.assertRaisesMessage(ValidationError, msg):
constraint.validate(Product, Product(price=42))
@skipUnlessDBFeature("supports_partial_indexes")
def test_validate_condition(self):
p1 = UniqueConstraintConditionProduct.objects.create(name="p1")
@ -921,7 +928,7 @@ class UniqueConstraintTests(TestCase):
)
@skipUnlessDBFeature("supports_partial_indexes")
def test_validate_conditon_custom_error(self):
def test_validate_condition_custom_error(self):
p1 = UniqueConstraintConditionProduct.objects.create(name="p1")
constraint = models.UniqueConstraint(
fields=["name"],