def cancle_watch_student(request, url_number): current_user = request.user student = Student.objects(url_number=url_number).get() if S_S_Card.objects(user=current_user): sc = S_S_Card.objects(user=current_user).get() else: sc = S_S_Card(user=current_user) if sc.cancle_watched_students(student): return HttpResponse('success') else: return HttpResponse('fail')