Method test_unsaved_cascade

test/orm/test_merge.py:453–526

Merge of a transient entity with two child transient entities, with a bidirectional relationship.

(self)

        )

    def test_unsaved_cascade(self):
        """Merge of a transient entity with two child transient
        entities, with a bidirectional relationship."""

        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(
                    self.mapper_registry.map_imperatively(Address, addresses),
                    cascade="all",
                    backref="user",
                )
            },
        )
        load = self.load_tracker(User)
        self.load_tracker(Address, load)
        sess = fixture_session()

        u = User(id=7, name="fred")
        a1 = Address(email_address="foo@bar.com")
        a2 = Address(email_address="hoho@bar.com")
        u.addresses.append(a1)
        u.addresses.append(a2)

        u2 = sess.merge(u)
        eq_(load.called, 3)

        eq_(
            u,
            User(
                id=7,
                name="fred",
                addresses=[
                    Address(email_address="foo@bar.com"),
                    Address(email_address="hoho@bar.com"),
                ],
            ),
        )
        eq_(
            u2,
            User(
                id=7,
                name="fred",
                addresses=[
                    Address(email_address="foo@bar.com"),
                    Address(email_address="hoho@bar.com"),
                ],
            ),
        )