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我在Django中使用Django 1.6
和model inheritance
。我想要做的是,吸引新的课程延伸。如何重写Django中模型的__new__元类方法
这将在Python中做过类似,
class Meta(type):
def __new__(cls, name, bases, newattrs):
do_what_you_want_before()
result= super(Meta, cls).__new__(cls, name, bases, newattrs)
do_what_you_want_after()
return result
class Foo:
__metaclass__ = Meta
class SubFoo(Foo):
pass
当这部分代码被初始化,定制__new__
方法将被调用。
我该如何在模型继承的Django中做到这一点。当您尝试使用Django Models执行此操作时,出现如下错误:
TypeError: Error when calling the metaclass bases
metaclass conflict: the metaclass of a derived class must be a (non-strict) subclass of the metaclasses of all its bases
谢谢。