django 如何在管理命令中使用多處理

Question

如何在 django 管理命令中使用多處理？ 我不知道如何在我的網站 django 上下文中啟動該過程

管理命令

users = users.objects.filter(is_active=True)

with ProcessPoolExecutor(max_workers=5) as executor:
   processes = []
   for user in users:
       p = executor.submit(complex_user_calculation,user)
       processes.append(p)

   for f in concurrent.futures.as_completed(processes):
       result = f.result()
       if result:
           print(result)

當我運行此管理命令時，我收到此錯誤

    raise AppRegistryNotReady("Apps aren't loaded yet.")
django.core.exceptions.AppRegistryNotReady: Apps aren't loaded yet.
...
  File "C:\Users\user\AppData\Local\Programs\Python\Python310\lib\concurrent\futures\_base.py", line 390, in __get_result
    raise self._exception
concurrent.futures.process.BrokenProcessPool: A process in the process pool was terminated abruptly while the future was running or pending.

Answer 1

您需要在每個子進程中初始化 Django 應用程序，以確保您的應用程序、模型等都已加載。 通過django.setup作為您的池初始化程序

with ProcessPoolExecutor(max_workers=5, initializer=django.setup) as executor:
    ...