this mixins convert a model to another, without take id field and only the fields that both models share

converter_models.py

class ConvertMixin(object):

    def convert(self, obj):
        options = obj._meta
        for field in sorted(options.get_fields()):
            if self.attr_exists(field.name) and field.name not in obj.get_list_remove():
                self.__setattr__(field.name,obj.__getattribute__(field.name))

    def attr_exists(self, name):
        return hasattr(self, name) or hasattr(self,"%s_id" % name)

    def get_list_remove(self):
        return ["id", "pk"]

very interesting to better explain me please ?? or any related post