Django自定义管理命令：AttributeError：'module'对象没有属性'Command'

I am trying to make a custom management command as show in the docs here: https://docs.djangoproject.com/en/dev/howto/custom-management-commands/

我试图在这里的文档中显示自定义管理命令：https：//docs.djangoproject.com/en/dev/howto/custom-management-commands/

When I try to run the command from my project directory I am experiencing the following error:

当我尝试从项目目录运行命令时，遇到以下错误：

AttributeError: 'module' object has no attribute 'Command'

Here is the file:

这是文件：

#event_expiration.py
from django.core.management.base import BaseCommand, CommandError
from app.models import Event
import datetime

class Command(BaseCommand):
    help = 'deletes expired events'

    def handle(self, *args, **options):

        today = datetime.datetime.now()
        events = Event.objects.filter(date=datetime.date(2011,11,11))

        for e in events:
            e.delete()

        self.stdout.write('Expired events successfully deleted.')

The command I am running is :

我正在运行的命令是：

$ python manage.py event_expiration

I've made sure I am adding the event_expiration.py file within management and commands folders and that those folders have init files. those are in one of my app folders.

我确保在管理和命令文件夹中添加event_expiration.py文件，并确保这些文件夹具有init文件。那些在我的app文件夹中。

Am I overlooking something here? Any help is appreciated, thanks!

我在这里俯瞰什么吗？任何帮助表示赞赏，谢谢！

EDIT:

编辑：

Fellow SO user Yuji helped me attempt to debug this a bit but we are still stumped. heres what we did:

SO用户Yuji帮助我尝试调试这一点，但我们仍然难过。继承人我们做了什么：

First, the full traceback and command:

首先，完整的回溯和命令：

(venv)matt@inspirion14z:~/Dropbox/PROD/ersvp.it$ python manage.py event_expiration
Traceback (most recent call last):
  File "manage.py", line 10, in <module>
    execute_from_command_line(sys.argv)
  File "/home/matt/Dropbox/PROD/ersvp.it/venv/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 443, in execute_from_command_line
    utility.execute()
  File "/home/matt/Dropbox/PROD/ersvp.it/venv/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 382, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/home/matt/Dropbox/PROD/ersvp.it/venv/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 261, in fetch_command
    klass = load_command_class(app_name, subcommand)
  File "/home/matt/Dropbox/PROD/ersvp.it/venv/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 70, in load_command_class
    return module.Command()
AttributeError: 'module' object has no attribute 'Command'

To see what was going on at django/core/management/init.py", line 70 I placed import pdb; pdb.set_trace() within the file.

要查看django / core / management / init.py上发生了什么，第70行我在文件中放置了import pdb; pdb.set_trace（）。

While in debug mode we tried:

在调试模式下，我们尝试：

module.__file__

to check if the module was where expected, and it indeed was, with an output of:

检查模块是否在预期的位置，确实是，输出为：

'/home/matt/Dropbox/PROD/ersvp.it/app/management/commands/event_expiration.pyc'

Next, we tried manually importing Command in the shell:

接下来，我们尝试在shell中手动导入Command：

>>> from app.management.commands.event_expiration import Command 
Traceback (most recent call last):   File "<console>", line 1, in <module> ImportError: cannot import name Command

Still scratching my head!

还在挠我的头！

2 个解决方案

#1

What is your file structure like? It should be like so:

你的文件结构是什么样的？它应该是这样的：

app/
    __init__.py
    management/
        __init__.py
        commands/
            __init__.py
            event_expiration.py

If the structure is as above, try the following:

如果结构如上，请尝试以下操作：

python manage.py shell
>>> from app.management.commands import event_expiration
>>> dir(event_expiration)
['Account', 'BaseCommand', 'Callback', 'Command', 'CommandError', 'Comment', 'Status', 'User', '__builtins__', '__doc__', '__file__', '__name__', '__package__', 'clean_phone_number', 'csv', 'models', 'os', 're']

I've listed the pure output of running dir on a management command of my own. Give that a try, and report back what is available to the module. You might find yourself getting an error at this point, which may help diagnose. I'm suspecting a problem with importing django itself. I'm guessing the python manage.py shell will fail, which will mean it's not a problem with your command, but a problem with the project.

我已经在我自己的管理命令中列出了运行目录的纯输出。尝试一下，并报告模块可用的内容。此时您可能会发现自己收到错误，这可能有助于诊断。我怀疑导入django本身有问题。我猜python manage.py shell会失败，这意味着它不是你的命令的问题，而是项目的问题。

Edit 2:

编辑2：

The fact that check_expiration was visible in your dir output supports my theory that the folder structure is amiss in someway. Unless there's specifically a function named that within your module.

check_expiration在你的dir输出中可见这一事实支持了我的理论，即文件夹结构在某种程度上是不对的。除非在您的模块中特别指定了一个函数。

Please do the following and show the output:

请执行以下操作并显示输出：

cd /path/to/app/
find .

Also, show the entire contents of your event_expiration.py file, and the contents of your management/commands/__init__.py file. Be wary of spaces mixed with tabs as whitespace also.

另外，显示event_expiration.py文件的全部内容以及management / commands / __ init__.py文件的内容。警惕与标签混合的空格也是空白。

#2

I ran into the same issue and the problem was that my command class wasn't called exactly Command, as the docs says. Example:

我遇到了同样的问题，问题是我的命令类没有像文件那样被称为Command。例：

class Command(NoArgsCommand):
    # Do something here

#1