app.autodiscover_tasks() 类型错误：autodiscover_tasks() 缺少 1 个必需的位置参数：'packages'

Question

我正在尝试在我的 django 应用程序中使用 celery。但是，我遇到了一个错误，所以我从我正在关注的书中复制了代码（以 Django 3 为例）。现在，当我运行python manage.py makemigrations 命令时，我得到了这个错误：

app.autodiscover_tasks() TypeError: autodiscover_tasks() missing 1 required positional argument: 'packages'

这是我的celery.py，错误是：

import os
from celery import Celery

# set the default Django settings module for the 'celery' program.
os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'myshop.settings')

app = Celery('myshop')

app.config_from_object('django.conf:settings')
app.autodiscover_tasks()

这是我的完整错误：

Traceback (most recent call last):
  File "manage.py", line 21, in <module>
    main()
  File "manage.py", line 17, in main
    execute_from_command_line(sys.argv)
  File "C:\Users\Dell\Desktop\Django\online-shop\venv\lib\site-packages\django\core\management\__init__.py", line 401, in execute_from_command_line
    utility.execute()
  File "C:\Users\Dell\Desktop\Django\online-shop\venv\lib\site-packages\django\core\management\__init__.py", line 345, in execute
    settings.INSTALLED_APPS
  File "C:\Users\Dell\Desktop\Django\online-shop\venv\lib\site-packages\django\conf\__init__.py", line 83, in __getattr__
    self._setup(name)
  File "C:\Users\Dell\Desktop\Django\online-shop\venv\lib\site-packages\django\conf\__init__.py", line 70, in _setup
    self._wrapped = Settings(settings_module)
  File "C:\Users\Dell\Desktop\Django\online-shop\venv\lib\site-packages\django\conf\__init__.py", line 177, in __init__
    mod = importlib.import_module(self.SETTINGS_MODULE)
  File "C:\Users\Dell\AppData\Local\Programs\Python\Python38\lib\importlib\__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
  File "<frozen importlib._bootstrap>", line 991, in _find_and_load
  File "<frozen importlib._bootstrap>", line 961, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
  File "<frozen importlib._bootstrap>", line 991, in _find_and_load
  File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 783, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "C:\Users\Dell\Desktop\Django\online-shop\myshop\myshop\__init__.py", line 2, in <module>
    from .celery import app as celery_app
  File "C:\Users\Dell\Desktop\Django\online-shop\myshop\myshop\celery.py", line 10, in <module>
    app.autodiscover_tasks()
TypeError: autodiscover_tasks() missing 1 required positional argument: 'packages'

有什么问题？

Answer 1

看起来您使用的是 Celery 版本 3.x app.autodiscover_tasks() 仅适用于版本 4.x

尝试使用：

from django.apps import apps
app.autodiscover_tasks(lambda: [n.name for n in apps.get_app_configs()])