Class User

test/orm/test_selectin_relations.py:3336–3342

        Base = cls.DeclarativeBasic

        class User(Base):
            __tablename__ = "user"

            id = Column(Integer, primary_key=True)
            type = Column(String(10))

            __mapper_args__ = {"polymorphic_on": type}

        class EmployerUser(User):
            roles = relationship("Role", lazy="selectin")