Class A

test/orm/test_lazy_relations.py:810–816

        @registry.mapped
        class A:
            __tablename__ = "a"

            id = Column(Integer, primary_key=True)
            _date = Column(Date, default=func.current_date())
            b_id = Column(Integer, ForeignKey("b.id"))
            b = relationship("B")

        @registry.mapped
        class B: