django - Heroku Django celery : NameError: name 'DATABASES' is not defined

Question

我正在关注this在 Heroku 上运行 celery 和 django 的教程。

但是，当我为工作人员输入指定的代码时，我在日志中收到此错误:

2011-12-22T05:31:56+00:00 heroku[web.1]: Starting process with command `python canada/manage.py run_gunicorn -b "0.0.0.0:47336" -w 3`
2011-12-22T05:31:56+00:00 app[web.1]: Unexpected error: (<type 'exceptions.NameError'>, NameError("name 'DATABASES' is not defined",), <traceback object at 0x11a9560>)
2011-12-22T05:31:56+00:00 app[web.1]: Traceback (most recent call last):
2011-12-22T05:31:56+00:00 app[web.1]:   File "canada/manage.py", line 11, in <module>
2011-12-22T05:31:56+00:00 app[web.1]:     import settings
2011-12-22T05:31:56+00:00 app[web.1]:   File "/app/canada/settings.py", line 51, in <module>
2011-12-22T05:31:56+00:00 app[web.1]:     CELERY_RESULT_DBURI = DATABASES['default']
2011-12-22T05:31:56+00:00 app[web.1]: NameError: name 'DATABASES' is not defined
2011-12-22T05:31:57+00:00 heroku[slugc]: Slug compilation finished
2011-12-22T05:31:57+00:00 heroku[web.1]: State changed from starting to crashed
2011-12-22T05:31:58+00:00 heroku[web.1]: Process exited

我的settings.py看起来像

import djcelery

djcelery.setup_loader()

BROKER_BACKEND = "djkombu.transport.DatabaseTransport"
CELERY_RESULT_DBURI = DATABASES['default']
...

当我在添加此行CELERY_RESULT_DBURI = DATABASES['default']之前进行同步时，它运行良好。根据the document

When you deploy a Django application, the compile process appends the following code to your settings.py to use the DATABASE_URL environment variable:

Answer 1

Heroku 在 settings.py 末尾添加 DATABASES 配置，因此当您在 settings.py 中引用 DATABASES 时，它不存在。

您可以在自己的文件中复制 Heroku DATABASES 设置(它只是从 env 的 DATABASE_URL 读取，请参阅: django-heroku-template )或使用您自己的 buildpack .