我正在使用hybrid_property合并或操纵列值。我想获得此hybrid_property列的“键”属性。这里是代码。
class Foo(Base):
name = Column(String)
address = Column(String)
city = Column(String)
@hybrid_property
def full_address(self):
return '{}, {}'.format(self.address, self.city)
@full_address.expression
def full_address(self):
return func.str('{}, {}'.format(self.address, self.city))
并且在Python Shell中:
>>> fld = Foo.name
>>> fld.key
'name'
>>> fld = Foo.full_address
>>> fld.key
>>> type(fld.key)
<class 'NoneType'>
如何获取fld.key是'full_address'?
最后我得到了答案
@ hybrid_propertydef full_address():如果isinstance(self,Foo):返回'{},{}'。format(self.address,self.city)其他:返回Column('full_address',String)