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Simplified schema.tests with assertForeignKeyExists()/assertForeignKeyNotExists().
Thanks Tim Graham for the review.
This commit is contained in:
Mariusz Felisiak
GitHub
parent
cb16458c4f
commit
663d1c3160
@ -173,6 +173,23 @@ class SchemaTests(TransactionTestCase):
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index_orders = constraints[index]['orders']
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self.assertTrue(all([(val == expected) for val, expected in zip(index_orders, order)]))
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def assertForeignKeyExists(self, model, column, expected_fk_table):
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"""
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Fail if the FK constraint on `model.Meta.db_table`.`column` to
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`expected_fk_table`.id doesn't exist.
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"""
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constraints = self.get_constraints(model._meta.db_table)
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constraint_fk = None
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for name, details in constraints.items():
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if details['columns'] == [column] and details['foreign_key']:
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constraint_fk = details['foreign_key']
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break
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self.assertEqual(constraint_fk, (expected_fk_table, 'id'))
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def assertForeignKeyNotExists(self, model, column, expected_fk_table):
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with self.assertRaises(AssertionError):
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self.assertForeignKeyExists(model, column, expected_fk_table)
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# Tests
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def test_creation_deletion(self):
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"""
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@ -214,14 +231,7 @@ class SchemaTests(TransactionTestCase):
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new_field.set_attributes_from_name("author")
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with connection.schema_editor() as editor:
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editor.alter_field(Book, old_field, new_field, strict=True)
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# Make sure the new FK constraint is present
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constraints = self.get_constraints(Book._meta.db_table)
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for name, details in constraints.items():
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if details['columns'] == ["author_id"] and details['foreign_key']:
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self.assertEqual(details['foreign_key'], ('schema_tag', 'id'))
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break
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else:
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self.fail("No FK constraint for author_id found")
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self.assertForeignKeyExists(Book, 'author_id', 'schema_tag')
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@skipUnlessDBFeature('supports_foreign_keys')
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def test_char_field_with_db_index_to_fk(self):
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@ -235,14 +245,7 @@ class SchemaTests(TransactionTestCase):
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new_field.set_attributes_from_name('char_field')
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with connection.schema_editor() as editor:
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editor.alter_field(AuthorCharFieldWithIndex, old_field, new_field, strict=True)
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# The new FK constraint is present
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constraints = self.get_constraints(AuthorCharFieldWithIndex._meta.db_table)
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constraint_fk = None
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for name, details in constraints.items():
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if details['columns'] == ['char_field_id'] and details['foreign_key']:
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constraint_fk = details['foreign_key']
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break
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self.assertEqual(constraint_fk, ('schema_author', 'id'))
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self.assertForeignKeyExists(AuthorCharFieldWithIndex, 'char_field_id', 'schema_author')
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@skipUnlessDBFeature('supports_foreign_keys')
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@skipUnlessDBFeature('supports_index_on_text_field')
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@ -257,14 +260,7 @@ class SchemaTests(TransactionTestCase):
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new_field.set_attributes_from_name('text_field')
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with connection.schema_editor() as editor:
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editor.alter_field(AuthorTextFieldWithIndex, old_field, new_field, strict=True)
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# The new FK constraint is present
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constraints = self.get_constraints(AuthorTextFieldWithIndex._meta.db_table)
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constraint_fk = None
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for name, details in constraints.items():
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if details['columns'] == ['text_field_id'] and details['foreign_key']:
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constraint_fk = details['foreign_key']
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break
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self.assertEqual(constraint_fk, ('schema_author', 'id'))
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self.assertForeignKeyExists(AuthorTextFieldWithIndex, 'text_field_id', 'schema_author')
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@skipUnlessDBFeature('supports_foreign_keys')
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def test_fk_to_proxy(self):
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@ -288,13 +284,7 @@ class SchemaTests(TransactionTestCase):
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with connection.schema_editor() as editor:
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editor.create_model(Author)
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editor.create_model(AuthorRef)
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constraints = self.get_constraints(AuthorRef._meta.db_table)
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for details in constraints.values():
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if details['columns'] == ['author_id'] and details['foreign_key']:
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self.assertEqual(details['foreign_key'], ('schema_author', 'id'))
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break
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else:
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self.fail('No FK constraint for author_id found')
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self.assertForeignKeyExists(AuthorRef, 'author_id', 'schema_author')
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@skipUnlessDBFeature('supports_foreign_keys')
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def test_fk_db_constraint(self):
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@ -308,44 +298,25 @@ class SchemaTests(TransactionTestCase):
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list(Author.objects.all())
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list(Tag.objects.all())
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list(BookWeak.objects.all())
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# BookWeak doesn't have an FK constraint
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constraints = self.get_constraints(BookWeak._meta.db_table)
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for name, details in constraints.items():
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if details['columns'] == ["author_id"] and details['foreign_key']:
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self.fail("FK constraint for author_id found")
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self.assertForeignKeyNotExists(BookWeak, 'author_id', 'schema_author')
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# Make a db_constraint=False FK
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new_field = ForeignKey(Tag, CASCADE, db_constraint=False)
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new_field.set_attributes_from_name("tag")
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with connection.schema_editor() as editor:
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editor.add_field(Author, new_field)
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# No FK constraint is present
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constraints = self.get_constraints(Author._meta.db_table)
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for name, details in constraints.items():
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if details['columns'] == ["tag_id"] and details['foreign_key']:
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self.fail("FK constraint for tag_id found")
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self.assertForeignKeyNotExists(Author, 'tag_id', 'schema_tag')
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# Alter to one with a constraint
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new_field2 = ForeignKey(Tag, CASCADE)
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new_field2.set_attributes_from_name("tag")
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with connection.schema_editor() as editor:
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editor.alter_field(Author, new_field, new_field2, strict=True)
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# The new FK constraint is present
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constraints = self.get_constraints(Author._meta.db_table)
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for name, details in constraints.items():
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if details['columns'] == ["tag_id"] and details['foreign_key']:
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self.assertEqual(details['foreign_key'], ('schema_tag', 'id'))
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break
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else:
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self.fail("No FK constraint for tag_id found")
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self.assertForeignKeyExists(Author, 'tag_id', 'schema_tag')
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# Alter to one without a constraint again
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new_field2 = ForeignKey(Tag, CASCADE)
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new_field2.set_attributes_from_name("tag")
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with connection.schema_editor() as editor:
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editor.alter_field(Author, new_field2, new_field, strict=True)
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# No FK constraint is present
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constraints = self.get_constraints(Author._meta.db_table)
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for name, details in constraints.items():
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if details['columns'] == ["tag_id"] and details['foreign_key']:
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self.fail("FK constraint for tag_id found")
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self.assertForeignKeyNotExists(Author, 'tag_id', 'schema_tag')
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def _test_m2m_db_constraint(self, M2MFieldClass):
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class LocalAuthorWithM2M(Model):
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@ -370,11 +341,7 @@ class SchemaTests(TransactionTestCase):
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# Add the field
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with connection.schema_editor() as editor:
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editor.add_field(LocalAuthorWithM2M, new_field)
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# No FK constraint is present
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constraints = self.get_constraints(new_field.remote_field.through._meta.db_table)
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for name, details in constraints.items():
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if details['columns'] == ["tag_id"] and details['foreign_key']:
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self.fail("FK constraint for tag_id found")
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self.assertForeignKeyNotExists(new_field.remote_field.through, 'tag_id', 'schema_tag')
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@skipUnlessDBFeature('supports_foreign_keys')
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def test_m2m_db_constraint(self):
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@ -768,14 +735,7 @@ class SchemaTests(TransactionTestCase):
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# Ensure the field is right to begin with
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columns = self.column_classes(Book)
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self.assertEqual(columns['author_id'][0], "IntegerField")
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# Make sure the FK constraint is present
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constraints = self.get_constraints(Book._meta.db_table)
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for name, details in constraints.items():
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if details['columns'] == ["author_id"] and details['foreign_key']:
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self.assertEqual(details['foreign_key'], ('schema_author', 'id'))
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break
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else:
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self.fail("No FK constraint for author_id found")
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self.assertForeignKeyExists(Book, 'author_id', 'schema_author')
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# Alter the FK
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old_field = Book._meta.get_field("author")
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new_field = ForeignKey(Author, CASCADE, editable=False)
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@ -785,14 +745,7 @@ class SchemaTests(TransactionTestCase):
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# Ensure the field is right afterwards
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columns = self.column_classes(Book)
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self.assertEqual(columns['author_id'][0], "IntegerField")
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# Make sure the FK constraint is present
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constraints = self.get_constraints(Book._meta.db_table)
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for name, details in constraints.items():
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if details['columns'] == ["author_id"] and details['foreign_key']:
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self.assertEqual(details['foreign_key'], ('schema_author', 'id'))
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break
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else:
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self.fail("No FK constraint for author_id found")
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self.assertForeignKeyExists(Book, 'author_id', 'schema_author')
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@skipUnlessDBFeature('supports_foreign_keys')
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def test_alter_to_fk(self):
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@ -824,14 +777,7 @@ class SchemaTests(TransactionTestCase):
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new_field.set_attributes_from_name("author")
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with connection.schema_editor() as editor:
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editor.alter_field(LocalBook, old_field, new_field, strict=True)
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constraints = self.get_constraints(LocalBook._meta.db_table)
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# Ensure FK constraint exists
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for name, details in constraints.items():
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if details['foreign_key'] and details['columns'] == ["author_id"]:
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self.assertEqual(details['foreign_key'], ('schema_author', 'id'))
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break
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else:
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self.fail("No FK constraint for author_id found")
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self.assertForeignKeyExists(LocalBook, 'author_id', 'schema_author')
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@skipUnlessDBFeature('supports_foreign_keys')
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def test_alter_o2o_to_fk(self):
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@ -851,14 +797,7 @@ class SchemaTests(TransactionTestCase):
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with self.assertRaises(IntegrityError):
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BookWithO2O.objects.create(author=author, title="Django 2", pub_date=datetime.datetime.now())
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BookWithO2O.objects.all().delete()
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# Make sure the FK constraint is present
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constraints = self.get_constraints(BookWithO2O._meta.db_table)
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author_is_fk = False
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for name, details in constraints.items():
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if details['columns'] == ['author_id']:
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if details['foreign_key'] and details['foreign_key'] == ('schema_author', 'id'):
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author_is_fk = True
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self.assertTrue(author_is_fk, "No FK constraint for author_id found")
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self.assertForeignKeyExists(BookWithO2O, 'author_id', 'schema_author')
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# Alter the OneToOneField to ForeignKey
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old_field = BookWithO2O._meta.get_field("author")
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new_field = ForeignKey(Author, CASCADE)
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@ -871,14 +810,7 @@ class SchemaTests(TransactionTestCase):
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# Ensure the field is not unique anymore
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Book.objects.create(author=author, title="Django 1", pub_date=datetime.datetime.now())
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Book.objects.create(author=author, title="Django 2", pub_date=datetime.datetime.now())
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# Make sure the FK constraint is still present
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constraints = self.get_constraints(Book._meta.db_table)
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author_is_fk = False
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for name, details in constraints.items():
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if details['columns'] == ['author_id']:
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if details['foreign_key'] and details['foreign_key'] == ('schema_author', 'id'):
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author_is_fk = True
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self.assertTrue(author_is_fk, "No FK constraint for author_id found")
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self.assertForeignKeyExists(Book, 'author_id', 'schema_author')
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@skipUnlessDBFeature('supports_foreign_keys')
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def test_alter_fk_to_o2o(self):
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@ -897,14 +829,7 @@ class SchemaTests(TransactionTestCase):
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Book.objects.create(author=author, title="Django 1", pub_date=datetime.datetime.now())
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Book.objects.create(author=author, title="Django 2", pub_date=datetime.datetime.now())
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Book.objects.all().delete()
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# Make sure the FK constraint is present
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constraints = self.get_constraints(Book._meta.db_table)
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author_is_fk = False
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for name, details in constraints.items():
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if details['columns'] == ['author_id']:
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if details['foreign_key'] and details['foreign_key'] == ('schema_author', 'id'):
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author_is_fk = True
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self.assertTrue(author_is_fk, "No FK constraint for author_id found")
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self.assertForeignKeyExists(Book, 'author_id', 'schema_author')
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# Alter the ForeignKey to OneToOneField
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old_field = Book._meta.get_field("author")
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new_field = OneToOneField(Author, CASCADE)
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@ -918,14 +843,7 @@ class SchemaTests(TransactionTestCase):
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BookWithO2O.objects.create(author=author, title="Django 1", pub_date=datetime.datetime.now())
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with self.assertRaises(IntegrityError):
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BookWithO2O.objects.create(author=author, title="Django 2", pub_date=datetime.datetime.now())
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# Make sure the FK constraint is present
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constraints = self.get_constraints(BookWithO2O._meta.db_table)
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author_is_fk = False
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for name, details in constraints.items():
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if details['columns'] == ['author_id']:
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if details['foreign_key'] and details['foreign_key'] == ('schema_author', 'id'):
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author_is_fk = True
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self.assertTrue(author_is_fk, "No FK constraint for author_id found")
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self.assertForeignKeyExists(BookWithO2O, 'author_id', 'schema_author')
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def test_alter_field_fk_to_o2o(self):
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with connection.schema_editor() as editor:
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@ -1363,16 +1281,12 @@ class SchemaTests(TransactionTestCase):
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editor.create_model(TagM2MTest)
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editor.create_model(UniqueTest)
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# Ensure the M2M exists and points to TagM2MTest
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constraints = self.get_constraints(
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LocalBookWithM2M._meta.get_field("tags").remote_field.through._meta.db_table
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)
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if connection.features.supports_foreign_keys:
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for name, details in constraints.items():
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if details['columns'] == ["tagm2mtest_id"] and details['foreign_key']:
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self.assertEqual(details['foreign_key'], ('schema_tagm2mtest', 'id'))
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break
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else:
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self.fail("No FK constraint for tagm2mtest_id found")
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self.assertForeignKeyExists(
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LocalBookWithM2M._meta.get_field("tags").remote_field.through,
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'tagm2mtest_id',
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'schema_tagm2mtest',
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)
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# Repoint the M2M
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old_field = LocalBookWithM2M._meta.get_field("tags")
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new_field = M2MFieldClass(UniqueTest)
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@ -1387,14 +1301,8 @@ class SchemaTests(TransactionTestCase):
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opts = LocalBookWithM2M._meta
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opts.local_many_to_many.remove(old_field)
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# Ensure the new M2M exists and points to UniqueTest
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constraints = self.get_constraints(new_field.remote_field.through._meta.db_table)
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if connection.features.supports_foreign_keys:
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for name, details in constraints.items():
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if details['columns'] == ["uniquetest_id"] and details['foreign_key']:
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self.assertEqual(details['foreign_key'], ('schema_uniquetest', 'id'))
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break
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else:
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self.fail("No FK constraint for uniquetest_id found")
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self.assertForeignKeyExists(new_field.remote_field.through, 'uniquetest_id', 'schema_uniquetest')
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def test_m2m_repoint(self):
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self._test_m2m_repoint(ManyToManyField)
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