Method test_history_get

test/orm/test_unitofwork.py:2158–2201

The history lazy-fetches data when it wasn't otherwise loaded.

(self)

        assert u.name == "imnew"

    def test_history_get(self):
        """The history lazy-fetches data when it wasn't otherwise loaded."""

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

        self.mapper_registry.map_imperatively(
            User,
            users,
            properties={
                "addresses": relationship(
                    Address, cascade="all, delete-orphan"
                )
            },
        )
        self.mapper_registry.map_imperatively(Address, addresses)

        u = User(name="u1")
        u.addresses.append(Address(email_address="u1@e1"))
        u.addresses.append(Address(email_address="u1@e2"))
        session = fixture_session()
        session.add(u)
        session.flush()
        session.expunge_all()

        u = session.get(User, u.id)
        session.delete(u)
        session.flush()
        eq_(
            session.connection().scalar(
                select(func.count("*")).select_from(users)
            ),
            0,
        )
        eq_(
            session.connection().scalar(
                select(func.count("*")).select_from(addresses)
            ),
            0,
        )

    def test_batch_mode(self):
        """The 'batch=False' flag on mapper()"""