Question

我目前在一个项目中使用SQL Alchemy和SQL Alchemy Utils URLType，但我一直试图找出如何清理SQLAlchemy属性输入的方法，以便数据库中唯一存储的是Furl对象的宿主。目前，我已经通过在每个set操作之前调用类方法来解决了这个问题，

class Website(Base, Timestamp):
    __tablename__ = "websites"

    id = Column(Integer, primary_key=True)

    # Data
    origin = Column(URLType, nullable=False, unique=True)

    # Functions
    @classmethod
    def prep_url(cls, url):
        return url.origin

x = furl('https://stackoverflow.com/questions/ask')
ws = Website(origin=Website.prep_url(x))
>>> ws.origin
stackoverflow.com

虽然我希望能够像这样使用它：

ws = Website(origin=x)
>>> ws.origin
stackoverflow.com

我以为this answer是我想要的，但是我找不到它的文档。

Answer 1

如何使用property/setter？

class Website(Base, Timestamp):
    __tablename__ = "websites"

    id = Column(Integer, primary_key=True)

    # Data
    origin_ = Column("origin", URLType, nullable=False, unique=True)

    @property
    def origin(self):
        return self.origin_

    @origin.setter
    def origin(self, url):
        self.origin_ = url.origin

x = furl('https://stackoverflow.com/questions/ask')
ws = Website(origin=x)
>>> ws.origin
stackoverflow.com

如何使用SQL Alchemy和SQL Alchemy Utils URLType以便仅保存主机名？

1 个答案: