无法从Django settings.py访问Heroku config vars [英] Unable to access Heroku config vars from Django settings.py

问题描述

我在Heroku上设置了一些config vars，如下所述： https：//devcenter.heroku。 COM /用品/配置 - 瓦尔。
当我运行时：

I have some config vars set on Heroku as described here: https://devcenter.heroku.com/articles/config-vars. When I run:

heroku config

我看到列表中的config var：

I see the config var in the list:

COMPRESS_OFFLINE:                  True

我可以运行

heroku config:get COMPRESS_OFFLINE

我得到：

True

在我的Django settings.py，我有：

In my Django settings.py, I have:

import os
COMPRESS_OFFLINE = os.environ['COMPRESS_OFFLINE']

这是上面链接的文章告诉您访问Django中的Heroku配置变量。我在本地的.env文件中有这个config var set，我可以在本地运行工头。但是，当我部署到Heroku时，在部署过程中会收到此错误：

This is how the article linked above tells you to access Heroku config variables in Django. I have this config var set in my local .env file, and I can run foreman locally. But, when I deploy to Heroku, I get this error during deploy:

KeyError: 'COMPRESS_OFFLINE'
!     Push rejected, failed to compile Python app

我有这种感觉，我很遗憾，建议？

I have the feeling I'm missing something painfully obvious, any suggestions?

推荐答案

我从Heroku的支持中得到一个答案，默认情况下，在slug编译期间环境变量不可用。但是，有一个名为user-env-compile的实验功能将使它们可用： http://devcenter.heroku.com/articles/labs-user-env-compile

I got an answer back from Heroku support that environment variables are not available during slug compilation by default. But, there is an experimental feature called user-env-compile that will make them available: http://devcenter.heroku.com/articles/labs-user-env-compile

然而，我不需要这个。我以为是因为在编译过程中找不到它们，根本无法找到它们。但是，我发现编译后可以使用它们。所以，我刚刚更新了settings.py，以便：

I didn't need this, though. I thought that because it couldn't find them during compile that it wouldn't be able to find them at all. But, I found that they are available after compile. So, I just updated settings.py to have:

COMPRESS_OFFLINE = os.environ.get('COMPRESS_OFFLINE', True)

当环境变量不可用时，它在编译时默认为True。

So that it defaults to True during compile when the environment variable is not available.

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