Method from_queryset

django/db/models/manager.py:108–118

(cls, queryset_class, class_name=None)

    @classmethod
    def from_queryset(cls, queryset_class, class_name=None):
        if class_name is None:
            class_name = "%sFrom%s" % (cls.__name__, queryset_class.__name__)
        return type(
            class_name,
            (cls,),
            {
                "_queryset_class": queryset_class,
                **cls._get_queryset_methods(queryset_class),
            },
        )

    def contribute_to_class(self, cls, name):
        self.name = self.name or name