python - 错误 : object. __new__() 不带参数

Question

我收到以下消息，此功能之前可以工作。我删除了下面的 .delay 函数只是为了生成消息，因为这是一项任务，但通常它看起来像 ProcessRequests.delay.(batch)

object._new_() 不带参数

if request.method == 'POST':                               
    batches = Batch.objects.for_user_pending(request.user) 
    for batch in batches:                                  
        ProcessRequests(batch)   #ProcessRequests.delay is normally used here                          
        batch.complete_update()                            

任务:

class ProcessRequests(Task):
    name = "Request to Process"
    max_retries = 1
    default_retry_delay = 3

    def run(self, batch):
        for e in Contact.objects.filter(contact_owner=batch.user, group=batch.group):
            msg = Message.objects.create(
                recipient_number=e.mobile,
                content=batch.content,
                sender=e.contact_owner,
                billee=batch.user,
                sender_name=batch.sender_name
            )
            gateway = Gateway.objects.get(pk=2)
            msg.send(gateway)

完整错误:

Environment:


Request Method: POST
Request URL: http://127.0.0.1:8000/sms/process

Django Version: 1.5.1
Python Version: 2.7.2
Installed Applications:
('django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.sites',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'django.contrib.admin',
 'django.contrib.humanize',
 'south',
 'sms',
 'debug_toolbar')
Installed Middleware:
('django.middleware.common.CommonMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'async_messages.middleware.AsyncMiddleware',
 'debug_toolbar.middleware.DebugToolbarMiddleware')


Traceback:
File "/Users/user/Documents/workspace/s/django-env/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response
  115.                         response = callback(request, *callback_args, **callback_kwargs)
File "/Users/user/Documents/workspace/s/django-env/lib/python2.7/site-packages/django/contrib/auth/decorators.py" in _wrapped_view
  25.                 return view_func(request, *args, **kwargs)
File "/Users/user/Documents/workspace/s/sms/views.py" in process_all
  214.             ProcessRequests(batch)

Exception Type: TypeError at /sms/process
Exception Value: object.__new__() takes no parameters

Answer 1

看起来您正在尝试使用参数实例化 ProcessRequests 类，但该类没有接受参数的构造函数，因此会出现错误。

我认为你只需要改变......

ProcessRequests(batch)

...到...

ProcessRequests().run(batch)

...但是它是否会执行您想要的操作取决于 Task 类的定义。