Python继承，将方法移动到公共类

Question

I am forgetting OOP terminology which was related to inheritance and which used classes dynamically. Here is what I am looking for.

    @classmethod
    def _match_slug(cls, slug):
        """ Method that checks if we still have a match in the db for current 'slug' """
        return cls.objects.filter(slug=slug).count()

I have 10 models in my application and each has this _match_slug method. I want to take this method to the parent class, so when I call self._match_slug(slug_to_check) it calls the method with its appropriate class cls .

Thoughts?

Answer 1

Move the method to your parent class:

class Parent(object):

    @classmethod
    def _match_slug(cls, slug):
        """ Method that checks if we still have a match in the db for current 'slug' """
        return cls.objects.filter(slug=slug).count()

class Child(Parent):
    ...

c = Child()
# Equivalent to Parent._match_slug(c.__class__, x)
c._match_slug(x)