SQLAlchemy ForeignKey找不到表

Question

我尝试实例化ConsumerAdvice该类时出现此错误.

Foreign key associated with column 'tbConsumerAdvice.ConsumerAdviceCategory_ID' 
could not find table 'tbConsumerAdviceCategories' with which to generate a
foreign key to target column 'ID_ConsumerAdviceCategories'

class ConsumerAdviceCategory(Base):
    __tablename__ = 'tbConsumerAdviceCategories'
    __table_args__ = {'schema':'dbo'}
    ID_ConsumerAdviceCategories = Column(INTEGER, Sequence('idcac'),\
            primary_key=True)
    Name = Column(VARCHAR(50), nullable=False)

    def __init__(self,Name):
        self.Name = Name

    def __repr__(self):
        return "< ConsumerAdviceCategory ('%s') >" % self.Name

class ConsumerAdvice(Base):
    __tablename__ = 'tbConsumerAdvice'
    __table_args__ = {'schema':'dbo'}
    ID_ConsumerAdvice = Column(INTEGER, Sequence('idconsumeradvice'),\
            primary_key=True)
    ConsumerAdviceCategory_ID = Column(INTEGER,\
            ForeignKey('tbConsumerAdviceCategories.ID_ConsumerAdviceCategories'))
    Name = Column(VARCHAR(50), nullable=False)
    Category_SubID = Column(INTEGER)

    ConsumerAdviceCategory = relationship("ConsumerAdviceCategory",\
            backref=backref('ConsumerAdvices'))

    def __init__(self,Name):
        self.Name = Name

    def __repr__(self):
        return "< ConsumerAdvice ('%s') >" % self.Name

Answer 1

定义FK包括架构: dbo.tbConsumerAdviceCategories.ID_ConsumerAdviceCategories

Answer 2

我也遇到了这个错误.在我的情况下,根本原因是我试图定义不同的sqlalchemy基类:

Base1 = declarative_base(cls=MyBase1)
Base1.query = db_session.query_property()

Base2 = declarative_base(cls=MyBase2)
Base2.query = db_session.query_property()

我ForeignKey从一个派生出来的派系Base1到另一个派生出来的派别Base2.这没用 - 我得到了类似的NoReferencedTableError.显然,类必须从相同的Base类派生才能相互了解.

希望这有助于某人.