django-celery ： 类型错误： 只能将元组(不是"NoneType")连接到元组

Question

我最近开始使用 rabbitmq 和 cracery with django。 我正在使用Django-Celery，Django-Celery-Email和Post Office以异步方式发送电子邮件。安装所有这些软件包后，我的 settings.py 看起来像

INSTALLED_APPS = [
#other apps
'djcelery',
'djcelery_email',
'post_office'
]

# setup celery
import djcelery
djcelery.setup_loader()
# using post office as the default email backend 
EMAIL_BACKEND = 'post_office.EmailBackend'
# using djcelery's email backend as a backend for post office 
POST_OFFICE_BACKEND = 'djcelery_email.backends.CeleryEmailBackend'
POST_OFFICE = {
    'DEFAULT_PRIORITY' : 'now'
}
EMAIL_HOST = 'YOUR_HOST_NAME'
EMAIL_HOST_USER = "YOUR_HOST_USER_NAME"
EMAIL_PORT = 25  # default smtp port
EMAIL_HOST_PASSWORD = "YOUR_HOST_USER_PASSWORD"
EMAIL_USE_TLS = False
DEFAULT_FROM_EMAIL = '[e-mail]'

当我尝试通过命令运行 Django-celery 时

**python manage.py celeryd**

它贯穿以下错误

Traceback (most recent call last):
  File "manage.py", line 22, in <module>
    execute_from_command_line(sys.argv)
  File "/home/ubuntu/edyodavirtual/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 364, in execute_from_command_line
    utility.execute()
  File "/home/ubuntu/edyodavirtual/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 356, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/home/ubuntu/edyodavirtual/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 206, in fetch_command
    klass = load_command_class(app_name, subcommand)
  File "/home/ubuntu/edyodavirtual/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 40, in load_command_class
    module = import_module('%s.management.commands.%s' % (app_name, name))
  File "/usr/lib/python2.7/importlib/__init__.py", line 37, in import_module
    __import__(name)
  File "/home/ubuntu/edyodavirtual/local/lib/python2.7/site-packages/djcelery/management/commands/celeryd.py", line 16, in <module>
    class Command(CeleryCommand):
  File "/home/ubuntu/edyodavirtual/local/lib/python2.7/site-packages/djcelery/management/commands/celeryd.py", line 20, in Command
    worker.get_options() +
TypeError: can only concatenate tuple (not "NoneType") to tuple

这里有人帮我解决这个问题

Answer 1

只需注释掉"~/anaconda2/envs/test_django/lib/python3.6/site-packages/djcelery/management/command/celery.py中的这些行，如下所示：

 14     #    options = (CeleryCommand.options +
 15     #           base.get_options() +
 16     #           base.preload_options)

然后它起作用了。

Answer 2

即使我也面临着同样的问题，我试图通过 djcelery 包将芹菜与 django 集成。然后我阅读了许多博客和文档，并发现了以下结论。

"以前版本的 Celery 需要一个单独的库才能与 Django 一起工作，但从 3.1 开始，情况不再如此。Django 现在开箱即用">

[芹菜笔记][1]http://docs.celeryproject.org/en/latest/django/first-步骤与姜戈.html

不使用 djcelery 我直接编写了任务，它有效！