为什么Celery在Python shell中工作,但在我的Django视图中却没有？(进口问题)

Question

我安装了Celery(最新的稳定版本.)我有一个名为的目录/home/myuser/fable/jobs.在这个目录中,我有一个名为tasks.py的文件:

from celery.decorators import task
from celery.task import Task

class Submitter(Task):
    def run(self, post, **kwargs):
        return "Yes, it works!!!!!!"

在这个目录中,我还有一个名为celeryconfig.py的文件:

BROKER_HOST = "localhost"
BROKER_PORT = 5672
BROKER_USER = "abc"
BROKER_PASSWORD = "xyz"
BROKER_VHOST = "fablemq"

CELERY_RESULT_BACKEND = "amqp"
CELERY_IMPORTS = ("tasks", )

在我/etc/profile,我把这些设置为我的PYTHONPATH:

• PYTHONPATH=/home/myuser/fable:/home/myuser/fable/jobs

所以我使用console($ celeryd --loglevel=INFO)运行我的Celery工作器,然后尝试一下.我打开Python控制台并导入任务.然后,我运行提交者.

>>> import fable.jobs.tasks as tasks
>>> s = tasks.Submitter()
>>> s.delay("abc")
<AsyncResult: d70d9732-fb07-4cca-82be-d7912124a987>

一切正常,正如您在我的控制台中看到的那样

[2011-01-09 17:30:05,766: INFO/MainProcess] Task tasks.Submitter[d70d9732-fb07-4cca-82be-d7912124a987] succeeded in 0.0398268699646s:

但是当我进入我的Django的views.py并运行上面的3行代码时,我得到了这个:

[2011-01-09 17:25:20,298: ERROR/MainProcess] Unknown task ignored: "Task of kind 'fable.jobs.tasks.Submitter' is not registered, please make sure it's imported.": {'retries': 0, 'task': 'fable.jobs.tasks.Submitter', 'args': ('abc',), 'expires': None, 'eta': None, 'kwargs': {}, 'id': 'eb5c65b4-f352-45c6-96f1-05d3a5329d53'}
Traceback (most recent call last):
  File "/home/myuser/mysite-env/lib/python2.6/site-packages/celery/worker/listener.py", line 321, in receive_message
    eventer=self.event_dispatcher)
  File "/home/myuser/mysite-env/lib/python2.6/site-packages/celery/worker/job.py", line 299, in from_message
    eta=eta, expires=expires)
  File "/home/myuser/mysite-env/lib/python2.6/site-packages/celery/worker/job.py", line 243, in __init__
    self.task = tasks[self.task_name]
  File "/home/myuser/mysite-env/lib/python2.6/site-packages/celery/registry.py", line 63, in __getitem__
    raise self.NotRegistered(str(exc))
NotRegistered: "Task of kind 'fable.jobs.tasks.Submitter' is not registered, please make sure it's imported."

这很奇怪,因为当我启动它时,celeryd客户端确实显示它已注册.

[2011-01-09 17:38:27,446: WARNING/MainProcess]  
Configuration ->
    . broker -> amqp://GOGOme@localhost:5672/fablemq
    . queues ->
        . celery -> exchange:celery (direct) binding:celery
    . concurrency -> 1
    . loader -> celery.loaders.default.Loader
    . logfile -> [stderr]@INFO
    . events -> OFF
    . beat -> OFF
    . tasks ->
        . tasks.Decayer
        . tasks.Submitter

有人可以帮忙吗？

Answer 1

这就是我最终的工作

在Settings.py中我添加了

CELERY_IMPORTS = ("myapp.jobs", )

在myapp文件夹下,我创建了一个名为jobs.py的文件

from celery.decorators import task

@task(name="jobs.add")
def add(x, y):
    return x * y

然后从命令行运行:python manage.py celeryd -l info

在另一个shell中我运行了python manage.py shell,然后

>>> from myapp.jobs import add
>>> result = add.delay(4, 4)
>>> result.result

而我得到:

16

重要的是,在添加新函数时必须重新运行两个命令shell.您必须在客户端和服务器上注册该名称.

:-)

Answer 2

我相信你的tasks.py文件需要在django应用程序(在settings.py中注册)才能导入.或者,您可以尝试从__init__.py主项目或其中一个应用程序中的文件导入任务.

还可以尝试从manage.py启动celeryd:

$ python manage.py celeryd -E -B -lDEBUG

(-E和-B可能是也可能不是必要的,但是这是我使用的).

Answer 3

请参阅文档中的自动命名和相对导入:

http://celeryq.org/docs/userguide/tasks.html#automatic-naming-and-relative-imports

任务名称是"tasks.Submitter"(如celeryd输出中所列),但您将任务导入为"fable.jobs.tasks.Submitter"

我想这里最好的解决方案是如果工作者也将其视为"fable.jobs.tasks.Submitter",从应用程序的角度来看它更有意义.

CELERY_IMPORTS = ("fable.jobs.tasks", )