Question

我在尝试使用和弦在发送完所有任务后发送任务时出错。

Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "/Users/wenzhixue/projects/workspace/fallfor_core/twitter/tasks.py", line 13, in bulk_change_bio
    chord([change_bio_task.delay(account,'http://fallfor.com') for account in account_list ])(shutdown.s(c))
  File "/Library/Python/2.7/site-packages/celery/canvas.py", line 470, in __call__
    _chord = self.type
  File "/Library/Python/2.7/site-packages/celery/canvas.py", line 467, in type
    return self._type or self.tasks[0].type.app.tasks['celery.chord']
AttributeError: 'AsyncResult' object has no attribute 'type'

-

@task()
def shutdown(ec2):
    print "shutting down!!!!"
    time.sleep(300)
    return True

c = Ec2()
account_list = Account.objects.all()
chord([change_bio_task.delay() for account in account_list ])(shutdown.s(c))

Answer 1

Chord接受两个参数：第一个子任务列表被称为一个组，第二个可选子是在列表中的整个任务完成后用作回调的子任务。

Example from API referance：

res = chord([add.s(2, 2), add.s(4, 4)])(sum_task.s())

在您的代码中，您将作为AsyncResults的第一个参数列表而不是子任务传递。这应该是正确的：

chord([change_bio_task.s() for account in account_list ])(shutdown.si(c))

看一下我将shutdown.s(c)更改为shutdown.si(c)这是不可变的，并忽略返回已完成change_bio_task的结果。

django芹菜和弦任务错误

1 个答案: