Method test_child_move

test/orm/test_unitofwork.py:1641–1685

Moving a child from one parent to another, with a delete. Tests that deleting the first parent properly updates the child with the new parent. This tests the 'trackparent' option in the attributes module.

(self)

        )

    def test_child_move(self):
        """Moving a child from one parent to another, with a delete.

        Tests that deleting the first parent properly updates the child with
        the new parent.  This tests the 'trackparent' option in the attributes
        module.

        """

        Address, addresses, users, User = (
            self.classes.Address,
            self.tables.addresses,
            self.tables.users,
            self.classes.User,
        )

        self.mapper_registry.map_imperatively(
            User,
            users,
            properties=dict(
                addresses=relationship(
                    self.mapper_registry.map_imperatively(Address, addresses),
                    lazy="select",
                )
            ),
        )

        u1 = User(name="user1")
        u2 = User(name="user2")
        a = Address(email_address="address1")
        u1.addresses.append(a)

        session = fixture_session()
        session.add_all((u1, u2))
        session.flush()

        del u1.addresses[0]
        u2.addresses.append(a)
        session.delete(u1)

        session.flush()
        session.expunge_all()

        u2 = session.get(User, u2.id)
        eq_(len(u2.addresses), 1)

    def test_child_move_2(self):
        Address, addresses, users, User = (