Commit 16488f9e authored by Mariusz Felisiak's avatar Mariusz Felisiak
Browse files

[4.1.x] Fixed #33902 -- Fixed Meta.constraints validation crash with F() expressions.

parent f30ce0b63f8f
......@@ -326,9 +326,12 @@ class UniqueConstraint(BaseConstraint):
# Ignore constraints with excluded fields.
if exclude:
for expression in self.expressions:
for expr in expression.flatten():
if isinstance(expr, F) and expr.name in exclude:
return
if hasattr(expression, "flatten"):
for expr in expression.flatten():
if isinstance(expr, F) and expr.name in exclude:
return
elif isinstance(expression, F) and expression.name in exclude:
return
replacement_map = instance._get_field_value_map(
meta=model._meta, exclude=exclude
)
......
......@@ -393,9 +393,7 @@ class BaseExpression:
clone = self.copy()
clone.set_source_expressions(
[
references_map.get(expr.name, expr)
if isinstance(expr, F)
else expr.replace_references(references_map)
expr.replace_references(references_map)
for expr in self.get_source_expressions()
]
)
......@@ -810,6 +808,9 @@ class F(Combinable):
):
return query.resolve_ref(self.name, allow_joins, reuse, summarize)
def replace_references(self, references_map):
return references_map.get(self.name, self)
def asc(self, **kwargs):
return OrderBy(self, **kwargs)
......
......@@ -29,3 +29,6 @@ Bugfixes
* Fixed a regression in Django 4.1 that caused a migration crash on SQLite
3.35.5+ when removing an indexed field (:ticket:`33899`).
* Fixed a bug in Django 4.1 that caused a crash of model validation on
``UniqueConstraint()`` with field names in ``expressions`` (:ticket:`33902`).
......@@ -685,6 +685,20 @@ class UniqueConstraintTests(TestCase):
exclude={"color"},
)
def test_validate_expression_str(self):
constraint = models.UniqueConstraint("name", name="name_uniq")
msg = "Constraint “name_uniq” is violated."
with self.assertRaisesMessage(ValidationError, msg):
constraint.validate(
UniqueConstraintProduct,
UniqueConstraintProduct(name=self.p1.name),
)
constraint.validate(
UniqueConstraintProduct,
UniqueConstraintProduct(name=self.p1.name),
exclude={"name"},
)
def test_name(self):
constraints = get_constraints(UniqueConstraintProduct._meta.db_table)
expected_name = "name_color_uniq"
......
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