Method setup_mappers

test/orm/test_backref_mutations.py:642–665

(cls)

    @classmethod
    def setup_mappers(cls):
        Address, addresses, users, User = (
            cls.classes.Address,
            cls.tables.addresses,
            cls.tables.users,
            cls.classes.User,
        )

        cls.mapper_registry.map_imperatively(Address, addresses)
        cls.mapper_registry.map_imperatively(
            User,
            users,
            properties={
                "address": relationship(
                    Address,
                    uselist=False,
                    backref=backref(
                        "user",
                        single_parent=True,
                        cascade="all, delete-orphan",
                    ),
                )
            },
        )

    def test_m2o_event(self):
        User, Address = self.classes.User, self.classes.Address