Class B

test/orm/test_selectin_relations.py:2252–2262

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

        class B(ComparableEntity, Base):
            __tablename__ = "b"
            id = Column(Integer, primary_key=True)
            a_id1 = Column()
            a_id2 = Column()

            a = relationship("A", back_populates="bs")

            __table_args__ = (
                ForeignKeyConstraint(["a_id1", "a_id2"], ["a.id1", "a.id2"]),
            )

    @classmethod
    def insert_data(cls, connection):