Class A

test/orm/test_selectin_relations.py:2245–2250

        Base = cls.DeclarativeBasic

        class A(ComparableEntity, Base):
            __tablename__ = "a"
            id1 = Column(Integer, primary_key=True)
            id2 = Column(Integer, primary_key=True)

            bs = relationship("B", order_by="B.id", back_populates="a")

        class B(ComparableEntity, Base):
            __tablename__ = "b"