芹菜打败方法任务不起作用 [英] Celery beat with method tasks not working

问题描述

我正在尝试在方法任务上运行celerybeat，但无法正常工作。这是一个示例设置：

I'm trying to run celerybeat on a method task, and can't get anything to work out properly. Here's an example setup:

from celery.contrib.methods import task_method
from celery import Celery, current_app

celery=celery('tasks', broker='amqp://guest@localhost//')
celery.config_from_object("celeryconfig")
class X(object):
    @celery.task(filter=task_method, name="X.ppp")
    def ppp(self):
        print "ppp"

，而我的celeryconfig.py文件是

and my celeryconfig.py file is

from datetime import timedelta
CELERYBEAT_SCHEDULE = {
      'test' : {
               'task' : 'X.ppp', 
               'schedule' : timedelta(seconds=5)
               }, 
 }

当我跑步芹菜节，出现类似以下错误：

When I run celery beat, I'm getting errors like:

 task X.ppp raised exception, TypeError('ppp() takes exactly 1 argument, (0 given)  

当我将方法转换为普通函数并用`@cel ery.task，它确实可以正常工作，因此其余的设置似乎都可以正常工作。我在有关方法任务的文档中看到了的警告，但无法真正找出问题所在。有谁知道如何解决这个问题？

When I turn the method into a normal function and decorate it with `@celery.task', it does work, so the rest of the setup seems to be working. I see the caveats in the docs about method tasks, but can't really sort out where the problem is. Does anyone know how to resolve this?

推荐答案

问题是Celerybeat在调用该方法之前不会实例化X。如果该方法未绑定到对象，则task_method过滤器默认会调用unbound方法。

The problem is that Celerybeat will not instantiate X before calling the method. The task_method filter defaults to calling the unbound method if the method is not bound to an object.

我的问题是，您要在这里完成什么？ X没有状态，那么为什么不使用module-evel函数呢？

My question is, what are you trying to accomplish here? X has no state, so why not use a module-evel function?

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