601 lines
23 KiB
Python
601 lines
23 KiB
Python
from unittest import mock
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from django.core.exceptions import ValidationError
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from django.db import IntegrityError, connection, models
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from django.db.models import F
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from django.db.models.constraints import BaseConstraint
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from django.db.models.functions import Lower
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from django.db.transaction import atomic
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from django.test import SimpleTestCase, TestCase, skipUnlessDBFeature
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from .models import (
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ChildModel,
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Product,
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UniqueConstraintConditionProduct,
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UniqueConstraintDeferrable,
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UniqueConstraintInclude,
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UniqueConstraintProduct,
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)
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def get_constraints(table):
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with connection.cursor() as cursor:
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return connection.introspection.get_constraints(cursor, table)
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class BaseConstraintTests(SimpleTestCase):
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def test_constraint_sql(self):
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c = BaseConstraint("name")
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msg = "This method must be implemented by a subclass."
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with self.assertRaisesMessage(NotImplementedError, msg):
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c.constraint_sql(None, None)
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def test_contains_expressions(self):
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c = BaseConstraint("name")
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self.assertIs(c.contains_expressions, False)
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def test_create_sql(self):
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c = BaseConstraint("name")
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msg = "This method must be implemented by a subclass."
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with self.assertRaisesMessage(NotImplementedError, msg):
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c.create_sql(None, None)
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def test_remove_sql(self):
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c = BaseConstraint("name")
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msg = "This method must be implemented by a subclass."
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with self.assertRaisesMessage(NotImplementedError, msg):
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c.remove_sql(None, None)
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class CheckConstraintTests(TestCase):
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def test_eq(self):
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check1 = models.Q(price__gt=models.F("discounted_price"))
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check2 = models.Q(price__lt=models.F("discounted_price"))
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self.assertEqual(
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models.CheckConstraint(check=check1, name="price"),
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models.CheckConstraint(check=check1, name="price"),
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)
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self.assertEqual(models.CheckConstraint(check=check1, name="price"), mock.ANY)
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self.assertNotEqual(
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models.CheckConstraint(check=check1, name="price"),
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models.CheckConstraint(check=check1, name="price2"),
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)
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self.assertNotEqual(
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models.CheckConstraint(check=check1, name="price"),
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models.CheckConstraint(check=check2, name="price"),
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)
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self.assertNotEqual(models.CheckConstraint(check=check1, name="price"), 1)
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def test_repr(self):
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constraint = models.CheckConstraint(
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check=models.Q(price__gt=models.F("discounted_price")),
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name="price_gt_discounted_price",
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)
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self.assertEqual(
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repr(constraint),
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"<CheckConstraint: check=(AND: ('price__gt', F(discounted_price))) "
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"name='price_gt_discounted_price'>",
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)
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def test_invalid_check_types(self):
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msg = "CheckConstraint.check must be a Q instance or boolean expression."
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with self.assertRaisesMessage(TypeError, msg):
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models.CheckConstraint(check=models.F("discounted_price"), name="check")
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def test_deconstruction(self):
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check = models.Q(price__gt=models.F("discounted_price"))
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name = "price_gt_discounted_price"
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constraint = models.CheckConstraint(check=check, name=name)
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path, args, kwargs = constraint.deconstruct()
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self.assertEqual(path, "django.db.models.CheckConstraint")
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self.assertEqual(args, ())
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self.assertEqual(kwargs, {"check": check, "name": name})
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@skipUnlessDBFeature("supports_table_check_constraints")
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def test_database_constraint(self):
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Product.objects.create(price=10, discounted_price=5)
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with self.assertRaises(IntegrityError):
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Product.objects.create(price=10, discounted_price=20)
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@skipUnlessDBFeature("supports_table_check_constraints")
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def test_database_constraint_unicode(self):
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Product.objects.create(price=10, discounted_price=5, unit="μg/mL")
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with self.assertRaises(IntegrityError):
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Product.objects.create(price=10, discounted_price=7, unit="l")
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@skipUnlessDBFeature("supports_table_check_constraints")
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def test_database_constraint_expression(self):
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Product.objects.create(price=999, discounted_price=5)
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with self.assertRaises(IntegrityError):
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Product.objects.create(price=1000, discounted_price=5)
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@skipUnlessDBFeature("supports_table_check_constraints")
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def test_database_constraint_expressionwrapper(self):
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Product.objects.create(price=499, discounted_price=5)
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with self.assertRaises(IntegrityError):
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Product.objects.create(price=500, discounted_price=5)
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@skipUnlessDBFeature(
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"supports_table_check_constraints", "can_introspect_check_constraints"
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)
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def test_name(self):
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constraints = get_constraints(Product._meta.db_table)
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for expected_name in (
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"price_gt_discounted_price",
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"constraints_price_lt_1000_raw",
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"constraints_price_neq_500_wrap",
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"constraints_product_price_gt_0",
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):
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with self.subTest(expected_name):
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self.assertIn(expected_name, constraints)
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@skipUnlessDBFeature(
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"supports_table_check_constraints", "can_introspect_check_constraints"
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)
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def test_abstract_name(self):
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constraints = get_constraints(ChildModel._meta.db_table)
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self.assertIn("constraints_childmodel_adult", constraints)
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class UniqueConstraintTests(TestCase):
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@classmethod
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def setUpTestData(cls):
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cls.p1, cls.p2 = UniqueConstraintProduct.objects.bulk_create(
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[
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UniqueConstraintProduct(name="p1", color="red"),
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UniqueConstraintProduct(name="p2"),
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]
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)
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def test_eq(self):
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self.assertEqual(
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models.UniqueConstraint(fields=["foo", "bar"], name="unique"),
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models.UniqueConstraint(fields=["foo", "bar"], name="unique"),
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)
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self.assertEqual(
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models.UniqueConstraint(fields=["foo", "bar"], name="unique"),
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mock.ANY,
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)
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self.assertNotEqual(
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models.UniqueConstraint(fields=["foo", "bar"], name="unique"),
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models.UniqueConstraint(fields=["foo", "bar"], name="unique2"),
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)
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self.assertNotEqual(
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models.UniqueConstraint(fields=["foo", "bar"], name="unique"),
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models.UniqueConstraint(fields=["foo", "baz"], name="unique"),
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)
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self.assertNotEqual(
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models.UniqueConstraint(fields=["foo", "bar"], name="unique"), 1
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)
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def test_eq_with_condition(self):
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self.assertEqual(
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models.UniqueConstraint(
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fields=["foo", "bar"],
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name="unique",
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condition=models.Q(foo=models.F("bar")),
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),
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models.UniqueConstraint(
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fields=["foo", "bar"],
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name="unique",
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condition=models.Q(foo=models.F("bar")),
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),
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)
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self.assertNotEqual(
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models.UniqueConstraint(
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fields=["foo", "bar"],
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name="unique",
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condition=models.Q(foo=models.F("bar")),
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),
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models.UniqueConstraint(
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fields=["foo", "bar"],
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name="unique",
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condition=models.Q(foo=models.F("baz")),
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),
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)
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def test_eq_with_deferrable(self):
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constraint_1 = models.UniqueConstraint(
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fields=["foo", "bar"],
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name="unique",
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deferrable=models.Deferrable.DEFERRED,
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)
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constraint_2 = models.UniqueConstraint(
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fields=["foo", "bar"],
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name="unique",
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deferrable=models.Deferrable.IMMEDIATE,
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)
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self.assertEqual(constraint_1, constraint_1)
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self.assertNotEqual(constraint_1, constraint_2)
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def test_eq_with_include(self):
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constraint_1 = models.UniqueConstraint(
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fields=["foo", "bar"],
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name="include",
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include=["baz_1"],
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)
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constraint_2 = models.UniqueConstraint(
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fields=["foo", "bar"],
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name="include",
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include=["baz_2"],
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)
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self.assertEqual(constraint_1, constraint_1)
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self.assertNotEqual(constraint_1, constraint_2)
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def test_eq_with_opclasses(self):
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constraint_1 = models.UniqueConstraint(
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fields=["foo", "bar"],
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name="opclasses",
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opclasses=["text_pattern_ops", "varchar_pattern_ops"],
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)
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constraint_2 = models.UniqueConstraint(
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fields=["foo", "bar"],
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name="opclasses",
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opclasses=["varchar_pattern_ops", "text_pattern_ops"],
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)
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self.assertEqual(constraint_1, constraint_1)
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self.assertNotEqual(constraint_1, constraint_2)
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def test_eq_with_expressions(self):
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constraint = models.UniqueConstraint(
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Lower("title"),
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F("author"),
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name="book_func_uq",
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)
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same_constraint = models.UniqueConstraint(
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Lower("title"),
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"author",
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name="book_func_uq",
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)
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another_constraint = models.UniqueConstraint(
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Lower("title"),
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name="book_func_uq",
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)
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self.assertEqual(constraint, same_constraint)
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self.assertEqual(constraint, mock.ANY)
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self.assertNotEqual(constraint, another_constraint)
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def test_repr(self):
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fields = ["foo", "bar"]
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name = "unique_fields"
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constraint = models.UniqueConstraint(fields=fields, name=name)
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self.assertEqual(
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repr(constraint),
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"<UniqueConstraint: fields=('foo', 'bar') name='unique_fields'>",
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)
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def test_repr_with_condition(self):
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constraint = models.UniqueConstraint(
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fields=["foo", "bar"],
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name="unique_fields",
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condition=models.Q(foo=models.F("bar")),
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)
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self.assertEqual(
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repr(constraint),
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"<UniqueConstraint: fields=('foo', 'bar') name='unique_fields' "
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"condition=(AND: ('foo', F(bar)))>",
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)
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def test_repr_with_deferrable(self):
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constraint = models.UniqueConstraint(
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fields=["foo", "bar"],
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name="unique_fields",
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deferrable=models.Deferrable.IMMEDIATE,
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)
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self.assertEqual(
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repr(constraint),
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"<UniqueConstraint: fields=('foo', 'bar') name='unique_fields' "
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"deferrable=Deferrable.IMMEDIATE>",
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)
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def test_repr_with_include(self):
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constraint = models.UniqueConstraint(
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fields=["foo", "bar"],
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name="include_fields",
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include=["baz_1", "baz_2"],
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)
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self.assertEqual(
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repr(constraint),
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"<UniqueConstraint: fields=('foo', 'bar') name='include_fields' "
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"include=('baz_1', 'baz_2')>",
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)
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def test_repr_with_opclasses(self):
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constraint = models.UniqueConstraint(
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fields=["foo", "bar"],
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name="opclasses_fields",
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opclasses=["text_pattern_ops", "varchar_pattern_ops"],
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)
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self.assertEqual(
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repr(constraint),
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"<UniqueConstraint: fields=('foo', 'bar') name='opclasses_fields' "
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"opclasses=['text_pattern_ops', 'varchar_pattern_ops']>",
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)
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def test_repr_with_expressions(self):
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constraint = models.UniqueConstraint(
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Lower("title"),
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F("author"),
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name="book_func_uq",
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)
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self.assertEqual(
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repr(constraint),
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"<UniqueConstraint: expressions=(Lower(F(title)), F(author)) "
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"name='book_func_uq'>",
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)
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def test_deconstruction(self):
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fields = ["foo", "bar"]
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name = "unique_fields"
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constraint = models.UniqueConstraint(fields=fields, name=name)
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path, args, kwargs = constraint.deconstruct()
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self.assertEqual(path, "django.db.models.UniqueConstraint")
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self.assertEqual(args, ())
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self.assertEqual(kwargs, {"fields": tuple(fields), "name": name})
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def test_deconstruction_with_condition(self):
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fields = ["foo", "bar"]
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name = "unique_fields"
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condition = models.Q(foo=models.F("bar"))
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constraint = models.UniqueConstraint(
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fields=fields, name=name, condition=condition
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)
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path, args, kwargs = constraint.deconstruct()
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self.assertEqual(path, "django.db.models.UniqueConstraint")
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self.assertEqual(args, ())
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self.assertEqual(
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kwargs, {"fields": tuple(fields), "name": name, "condition": condition}
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)
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def test_deconstruction_with_deferrable(self):
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fields = ["foo"]
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name = "unique_fields"
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constraint = models.UniqueConstraint(
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fields=fields,
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name=name,
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deferrable=models.Deferrable.DEFERRED,
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)
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path, args, kwargs = constraint.deconstruct()
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self.assertEqual(path, "django.db.models.UniqueConstraint")
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self.assertEqual(args, ())
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self.assertEqual(
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kwargs,
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{
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"fields": tuple(fields),
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"name": name,
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"deferrable": models.Deferrable.DEFERRED,
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},
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)
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def test_deconstruction_with_include(self):
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fields = ["foo", "bar"]
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name = "unique_fields"
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include = ["baz_1", "baz_2"]
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constraint = models.UniqueConstraint(fields=fields, name=name, include=include)
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path, args, kwargs = constraint.deconstruct()
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self.assertEqual(path, "django.db.models.UniqueConstraint")
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self.assertEqual(args, ())
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self.assertEqual(
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kwargs,
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{
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"fields": tuple(fields),
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"name": name,
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"include": tuple(include),
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},
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)
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def test_deconstruction_with_opclasses(self):
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fields = ["foo", "bar"]
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name = "unique_fields"
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opclasses = ["varchar_pattern_ops", "text_pattern_ops"]
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constraint = models.UniqueConstraint(
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fields=fields, name=name, opclasses=opclasses
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)
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path, args, kwargs = constraint.deconstruct()
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self.assertEqual(path, "django.db.models.UniqueConstraint")
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self.assertEqual(args, ())
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self.assertEqual(
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kwargs,
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{
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"fields": tuple(fields),
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"name": name,
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"opclasses": opclasses,
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},
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)
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def test_deconstruction_with_expressions(self):
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name = "unique_fields"
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constraint = models.UniqueConstraint(Lower("title"), name=name)
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path, args, kwargs = constraint.deconstruct()
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self.assertEqual(path, "django.db.models.UniqueConstraint")
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self.assertEqual(args, (Lower("title"),))
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self.assertEqual(kwargs, {"name": name})
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def test_database_constraint(self):
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with self.assertRaises(IntegrityError):
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UniqueConstraintProduct.objects.create(
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name=self.p1.name, color=self.p1.color
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)
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@skipUnlessDBFeature("supports_partial_indexes")
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def test_database_constraint_with_condition(self):
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UniqueConstraintConditionProduct.objects.create(name="p1")
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UniqueConstraintConditionProduct.objects.create(name="p2")
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with self.assertRaises(IntegrityError):
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UniqueConstraintConditionProduct.objects.create(name="p1")
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def test_model_validation(self):
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msg = "Unique constraint product with this Name and Color already exists."
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with self.assertRaisesMessage(ValidationError, msg):
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UniqueConstraintProduct(
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name=self.p1.name, color=self.p1.color
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).validate_unique()
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@skipUnlessDBFeature("supports_partial_indexes")
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def test_model_validation_with_condition(self):
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"""Partial unique constraints are ignored by Model.validate_unique()."""
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obj1 = UniqueConstraintConditionProduct.objects.create(name="p1", color="red")
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obj2 = UniqueConstraintConditionProduct.objects.create(name="p2")
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UniqueConstraintConditionProduct(name=obj1.name, color="blue").validate_unique()
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UniqueConstraintConditionProduct(name=obj2.name).validate_unique()
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def test_name(self):
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constraints = get_constraints(UniqueConstraintProduct._meta.db_table)
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expected_name = "name_color_uniq"
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self.assertIn(expected_name, constraints)
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def test_condition_must_be_q(self):
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with self.assertRaisesMessage(
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ValueError, "UniqueConstraint.condition must be a Q instance."
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):
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models.UniqueConstraint(name="uniq", fields=["name"], condition="invalid")
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@skipUnlessDBFeature("supports_deferrable_unique_constraints")
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def test_initially_deferred_database_constraint(self):
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obj_1 = UniqueConstraintDeferrable.objects.create(name="p1", shelf="front")
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obj_2 = UniqueConstraintDeferrable.objects.create(name="p2", shelf="back")
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def swap():
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obj_1.name, obj_2.name = obj_2.name, obj_1.name
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obj_1.save()
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obj_2.save()
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swap()
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# Behavior can be changed with SET CONSTRAINTS.
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with self.assertRaises(IntegrityError):
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with atomic(), connection.cursor() as cursor:
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constraint_name = connection.ops.quote_name("name_init_deferred_uniq")
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cursor.execute("SET CONSTRAINTS %s IMMEDIATE" % constraint_name)
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swap()
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@skipUnlessDBFeature("supports_deferrable_unique_constraints")
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def test_initially_immediate_database_constraint(self):
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obj_1 = UniqueConstraintDeferrable.objects.create(name="p1", shelf="front")
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obj_2 = UniqueConstraintDeferrable.objects.create(name="p2", shelf="back")
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obj_1.shelf, obj_2.shelf = obj_2.shelf, obj_1.shelf
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with self.assertRaises(IntegrityError), atomic():
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obj_1.save()
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# Behavior can be changed with SET CONSTRAINTS.
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with connection.cursor() as cursor:
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constraint_name = connection.ops.quote_name("sheld_init_immediate_uniq")
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cursor.execute("SET CONSTRAINTS %s DEFERRED" % constraint_name)
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obj_1.save()
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obj_2.save()
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def test_deferrable_with_condition(self):
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message = "UniqueConstraint with conditions cannot be deferred."
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with self.assertRaisesMessage(ValueError, message):
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models.UniqueConstraint(
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fields=["name"],
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name="name_without_color_unique",
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condition=models.Q(color__isnull=True),
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deferrable=models.Deferrable.DEFERRED,
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)
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def test_deferrable_with_include(self):
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message = "UniqueConstraint with include fields cannot be deferred."
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with self.assertRaisesMessage(ValueError, message):
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models.UniqueConstraint(
|
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fields=["name"],
|
|
name="name_inc_color_color_unique",
|
|
include=["color"],
|
|
deferrable=models.Deferrable.DEFERRED,
|
|
)
|
|
|
|
def test_deferrable_with_opclasses(self):
|
|
message = "UniqueConstraint with opclasses cannot be deferred."
|
|
with self.assertRaisesMessage(ValueError, message):
|
|
models.UniqueConstraint(
|
|
fields=["name"],
|
|
name="name_text_pattern_ops_unique",
|
|
opclasses=["text_pattern_ops"],
|
|
deferrable=models.Deferrable.DEFERRED,
|
|
)
|
|
|
|
def test_deferrable_with_expressions(self):
|
|
message = "UniqueConstraint with expressions cannot be deferred."
|
|
with self.assertRaisesMessage(ValueError, message):
|
|
models.UniqueConstraint(
|
|
Lower("name"),
|
|
name="deferred_expression_unique",
|
|
deferrable=models.Deferrable.DEFERRED,
|
|
)
|
|
|
|
def test_invalid_defer_argument(self):
|
|
message = "UniqueConstraint.deferrable must be a Deferrable instance."
|
|
with self.assertRaisesMessage(ValueError, message):
|
|
models.UniqueConstraint(
|
|
fields=["name"],
|
|
name="name_invalid",
|
|
deferrable="invalid",
|
|
)
|
|
|
|
@skipUnlessDBFeature(
|
|
"supports_table_check_constraints",
|
|
"supports_covering_indexes",
|
|
)
|
|
def test_include_database_constraint(self):
|
|
UniqueConstraintInclude.objects.create(name="p1", color="red")
|
|
with self.assertRaises(IntegrityError):
|
|
UniqueConstraintInclude.objects.create(name="p1", color="blue")
|
|
|
|
def test_invalid_include_argument(self):
|
|
msg = "UniqueConstraint.include must be a list or tuple."
|
|
with self.assertRaisesMessage(ValueError, msg):
|
|
models.UniqueConstraint(
|
|
name="uniq_include",
|
|
fields=["field"],
|
|
include="other",
|
|
)
|
|
|
|
def test_invalid_opclasses_argument(self):
|
|
msg = "UniqueConstraint.opclasses must be a list or tuple."
|
|
with self.assertRaisesMessage(ValueError, msg):
|
|
models.UniqueConstraint(
|
|
name="uniq_opclasses",
|
|
fields=["field"],
|
|
opclasses="jsonb_path_ops",
|
|
)
|
|
|
|
def test_opclasses_and_fields_same_length(self):
|
|
msg = (
|
|
"UniqueConstraint.fields and UniqueConstraint.opclasses must have "
|
|
"the same number of elements."
|
|
)
|
|
with self.assertRaisesMessage(ValueError, msg):
|
|
models.UniqueConstraint(
|
|
name="uniq_opclasses",
|
|
fields=["field"],
|
|
opclasses=["foo", "bar"],
|
|
)
|
|
|
|
def test_requires_field_or_expression(self):
|
|
msg = (
|
|
"At least one field or expression is required to define a unique "
|
|
"constraint."
|
|
)
|
|
with self.assertRaisesMessage(ValueError, msg):
|
|
models.UniqueConstraint(name="name")
|
|
|
|
def test_expressions_and_fields_mutually_exclusive(self):
|
|
msg = "UniqueConstraint.fields and expressions are mutually exclusive."
|
|
with self.assertRaisesMessage(ValueError, msg):
|
|
models.UniqueConstraint(Lower("field_1"), fields=["field_2"], name="name")
|
|
|
|
def test_expressions_with_opclasses(self):
|
|
msg = (
|
|
"UniqueConstraint.opclasses cannot be used with expressions. Use "
|
|
"django.contrib.postgres.indexes.OpClass() instead."
|
|
)
|
|
with self.assertRaisesMessage(ValueError, msg):
|
|
models.UniqueConstraint(
|
|
Lower("field"),
|
|
name="test_func_opclass",
|
|
opclasses=["jsonb_path_ops"],
|
|
)
|
|
|
|
def test_requires_name(self):
|
|
msg = "A unique constraint must be named."
|
|
with self.assertRaisesMessage(ValueError, msg):
|
|
models.UniqueConstraint(fields=["field"])
|