Method roundtrip

test/ext/test_associationproxy.py:1290–1295

(self, obj)

        cls.mapper_registry.map_imperatively(Child, cls.tables.Children)

    def roundtrip(self, obj):
        self.session.add(obj)
        self.session.flush()
        id_, type_ = obj.id, type(obj)
        self.session.expunge_all()
        return self.session.get(type_, id_)

    def test_lazy_list(self):
        Parent, Child = self.classes("Parent", "Child")