如何访问sqlalchemy中的孩子object

Question

有人可以帮忙吗

subscription = session.get(SubscriptionModel, 1)
print(subscription.customer)

这会打印客户的 ID，但我如何获得客户 object？

Answer 1

您必须定义您的数据 model 以包含与另一个 class 的关系。应该这样做

class subscription (Base):
    __tablename__ = 'subscription'
    id = Column(Integer, primary_key=True)
    customer_id = Column(Integer, ForeignKey('subscription_model.id'))

    customer = relationship("SubscriptionModel", foreign_keys=customer_id )

然后你将拥有 object 而不是 id：

subscription = session.query(SubscriptionModel).get(1)
print(subscription.customer_id) # ID
print(subscription.customer)    # Object