Sqlalchemy中连接表继承的多重继承

Question

我想在flask-sqlalchemy中定义一个从两个基本模型继承的模型，如下所示：

class BaseModel(db.Model):
    id = db.Column(db.Integer(). primary_key=1)

class BaseModelA(BaseModel):
    base_model_a_field = db.Column(db.String(9))
    base_model_a_type = db.Column(db.String(9))
    __mapper_args__ = {"polymorphic_identity": "a", "polymorphic_on": base_model_a_type}

class BaseModelB(BaseModel):
    base_model_b_field = db.Column(db.String(9))
    base_model_b_type = db.Column(db.String(9))
    __mapper_args__ = {"polymorphic_identity": "b", "polymorphic_on": base_model_b_type}

class InheritancedModel(BaseModelA, BaseModelB):

    model_a_id = db.Column(db.Integer(), db.ForeignKey("base_model_a.id"), primary_key=1)
    model_b_id = db.Column(db.Integer(), db.ForeignKey("base_model_b.id"), primary_key=1)

    other_field = db.Column(db.String(9))

创建InheritancedModel的实例时，

IntegrityError: (_mysql_exceptions.IntegrityError) (1452, 'Cannot add or update a child row: a foreign key constraint fails发生了。

我可以在sqlalchemy中对连接表继承进行多重继承吗？

我在sqlalchemy中找不到有关多重继承的任何信息。