python - celery + Django 错误 : TypeError: 'Settings' object is not subscriptable

Question

我遇到了这个问题，但我完全不知道它是从哪里来的。

我使用的代码与 the Celery tutorial 中提供的代码完全相同除了我将项目目录也用作我唯一的应用程序目录这一事实(因此，拥有 models.py、views.py 并将“proj”添加到 INSTALLED_APPS)。

奇怪的是，在我的本地机器上尝试这个设置时，错误总是出现在每个 django 命令(迁移、shell...)中。删除 virtualenv 并重新安装 misteriously 修复了它。现在，将应用程序推送到 Heroku 时，我遇到了同样的问题，无法正常工作。

有什么提示吗？谢谢!

ps: Python 3.4.2, Django 1.8.4, Celery 3.1.18

---

错误回溯:

Running `celery -A proj worker -l info` attached to terminal... up, run.7187
Traceback (most recent call last):
  File "/app/.heroku/python/bin/celery", line 9, in <module>
    load_entry_point('celery==3.1.0', 'console_scripts', 'celery')()
  File "/app/.heroku/python/lib/python3.4/site-packages/celery/__main__.py", line 29, in main
    main()
  File "/app/.heroku/python/lib/python3.4/site-packages/celery/bin/celery.py", line 80, in main
    cmd.execute_from_commandline(argv)
  File "/app/.heroku/python/lib/python3.4/site-packages/celery/bin/celery.py", line 732, in execute_from_commandline
    super(CeleryCommand, self).execute_from_commandline(argv)))
  File "/app/.heroku/python/lib/python3.4/site-packages/celery/bin/base.py", line 299, in execute_from_commandline
    argv = self.setup_app_from_commandline(argv)
  File "/app/.heroku/python/lib/python3.4/site-packages/celery/bin/base.py", line 429, in setup_app_from_commandline
    self.app = self.find_app(app)
  File "/app/.heroku/python/lib/python3.4/site-packages/celery/bin/base.py", line 449, in find_app
    sym = self.symbol_by_name(app)
  File "/app/.heroku/python/lib/python3.4/site-packages/celery/bin/base.py", line 474, in symbol_by_name
    return symbol_by_name(name, imp=import_from_cwd)
  File "/app/.heroku/python/lib/python3.4/site-packages/kombu/utils/__init__.py", line 92, in symbol_by_name
    module = imp(module_name, package=package, **kwargs)
  File "/app/.heroku/python/lib/python3.4/site-packages/celery/utils/imports.py", line 101, in import_from_cwd
    return imp(module, package=package)
  File "/app/.heroku/python/lib/python3.4/importlib/__init__.py", line 109, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 2254, in _gcd_import
  File "<frozen importlib._bootstrap>", line 2237, in _find_and_load
  File "<frozen importlib._bootstrap>", line 2226, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 1200, in _load_unlocked
  File "<frozen importlib._bootstrap>", line 1129, in _exec
  File "<frozen importlib._bootstrap>", line 1471, in exec_module
  File "<frozen importlib._bootstrap>", line 321, in _call_with_frames_removed
  File "/app/proj/__init__.py", line 5, in <module>
    from .celery import app as celery_app
  File "/app/proj/celery.py", line 17, in <module>
    app.autodiscover_tasks(lambda: settings.INSTALLED_APPS)
  File "/app/.heroku/python/lib/python3.4/site-packages/celery/app/base.py", line 277, in autodiscover_tasks
    if self.conf.CELERY_FORCE_BILLIARD_LOGGING:
  File "/app/.heroku/python/lib/python3.4/site-packages/celery/datastructures.py", line 336, in __getattr__
    return self[k]
  File "/app/.heroku/python/lib/python3.4/site-packages/celery/datastructures.py", line 458, in __getitem__
    return d[key]
  File "/app/.heroku/python/lib/python3.4/site-packages/django/utils/functional.py", line 227, in inner
    return func(self._wrapped, *args)
TypeError: 'Settings' object is not subscriptable

Answer 1

您正在关注 Celery 4.0 的文档，但您使用的是 Celery 3.1.18，这会给你一个错误。

使用 pip 将安装的 celery 升级到 4.0 以上。

pip install -U celery