Question

以下是基本的芹菜代码

 @app.task
 def t_select(booking_id, seat_id, user_id):
     with transaction.atomic():
         booking = Booking.objects.get(id=booking_id)
         booking.seats.add(Seat.objects.get(pk=seat_id))
         return booking.save()

出现以下错误：

[2018-04-01 02:25:55,893: INFO/MainProcess] Received task: functors.booker.t_select[cec7f2ca-bca0-4f3e-9865-102f3528ce3a]  
[2018-04-01 02:25:55,894: ERROR/ForkPoolWorker-4] Task functors.booker.t_select[e3a69d6b-1fc9-44cb-96ce-bfe18a1c96a9] raised unexpected: DoesNotExist('Booking matching query does not exist.',)
Traceback (most recent call last):
  File "/usr/local/lib/python3.5/dist-packages/celery/app/trace.py", line 374, in trace_task
    R = retval = fun(*args, **kwargs)
  File "/usr/local/lib/python3.5/dist-packages/celery/app/trace.py", line 629, in __protected_call__
    return self.run(*args, **kwargs)
  File "/home/harshil/Courses/SE/movie_recommender/functors/booker.py", line 9, in t_select
    try:
  File "/usr/local/lib/python3.5/dist-packages/django/db/models/manager.py", line 82, in manager_method
    return getattr(self.get_queryset(), name)(*args, **kwargs)
  File "/usr/local/lib/python3.5/dist-packages/django/db/models/query.py", line 403, in get
    self.model._meta.object_name
booking_system.models.DoesNotExist: Booking matching query does not exist.

在打印Booking.object.all（）时，我得到3个对象，这是我用来调用上面的函数。因此，不应该DoesNotExist错误。谁能帮我解决问题呢？

编辑：仅在测试代码时发生

Answer 1

您使用的是真正的芹菜工艺吗？或者您的芹菜设置是否设置为急切（如同，与您的测试同步）？如果您正在使用真正的芹菜过程，那么很可能您的对象是在测试数据库中创建的，而芹菜的django实例正在尝试访问真实的数据库。

尝试将您的设置设置为急切，看看它是否仍然有效。

与Django和芹菜的DoesNotExists错误

1 个答案: