django admin manytomany获取所选字段值

    def save_model(self, request, obj, form, change):

        door_id_list= request.REQUEST.getlist('door')

        obj.save()

        print obj.id,'=========id'

        for door_id in door_id_list:

            print Door.objects.get(id=int(door_id)).door_name

door_id_list就是获取的值，以前想的太复杂  原来这么简单