Method setup_mappers

test/orm/test_deferred.py:1712–1718

(cls)

    @classmethod
    def setup_mappers(cls):
        super().setup_mappers()
        from sqlalchemy import inspect

        inspect(Company).add_property(
            "managers", relationship(Manager, viewonly=True)
        )

    def test_load_only_subclass(self):
        s = fixture_session()