What is the difference between django classonlymethod and python classmethod?
Question:
Why is there a need for Django to introduce the decorator classonlymethod ?
Why can’t it reuse python classmethod?
Answers:
The best explanation is the source code itself:
class classonlymethod(classmethod):
def __get__(self, instance, cls=None):
if instance is not None:
raise AttributeError("This method is available only on the class, not on instances.")
return super().__get__(instance, cls)
The difference is that a classmethod can be called on an instance, having the same effect as calling it on the class, but the classonlymethod can only be called on the class.
Why is there a need for Django to introduce the decorator classonlymethod ?
Why can’t it reuse python classmethod?
The best explanation is the source code itself:
class classonlymethod(classmethod):
def __get__(self, instance, cls=None):
if instance is not None:
raise AttributeError("This method is available only on the class, not on instances.")
return super().__get__(instance, cls)
The difference is that a classmethod can be called on an instance, having the same effect as calling it on the class, but the classonlymethod can only be called on the class.