如何在 Django 设置中访问 Heroku 配置变量

Question

我正在尝试将我的代码推送到Heroku，我使用environ包隐藏了我的密钥，但现在由于我使用了gitignore忽略了我的.env文件，所以Heroku无法访问它，我已经阅读了关于Heroku配置变量的内容，但我不知道如何让Django访问这些值。

    import os
    import environ
    # from .secret import key
    
    env = environ.Env()
    environ.Env.read_env()
    

SECRET_KEY = env('KEY',default=env('SECRET_KEY'))

更新后的代码 在日志中，出现了如下错误

warnings.warn(
       Traceback (most recent call last):
         File "/app/.heroku/python/lib/python3.8/site-packages/environ/environ.py", line 277, in get_value
           value = self.ENVIRON[var]
         File "/app/.heroku/python/lib/python3.8/os.py", line 675, in __getitem__
           raise KeyError(key) from None
       KeyError: 'SECRET_KEY'
       During handling of the above exception, another exception occurred:
       Traceback (most recent call last):
         File "manage.py", line 22, in <module>
           main()
         File "manage.py", line 18, in main
           execute_from_command_line(sys.argv)
         File "/app/.heroku/python/lib/python3.8/site-packages/django/core/management/__init__.py", line 419, in execute_from_command_line
           utility.execute()
         File "/app/.heroku/python/lib/python3.8/site-packages/django/core/management/__init__.py", line 413, in execute
           self.fetch_command(subcommand).run_from_argv(self.argv)
         File "/app/.heroku/python/lib/python3.8/site-packages/django/core/management/__init__.py", line 244, in fetch_command
           settings.INSTALLED_APPS
         File "/app/.heroku/python/lib/python3.8/site-packages/django/conf/__init__.py", line 82, in __getattr__
           self._setup(name)
         File "/app/.heroku/python/lib/python3.8/site-packages/django/conf/__init__.py", line 69, in _setup
           self._wrapped = Settings(settings_module)
         File "/app/.heroku/python/lib/python3.8/site-packages/django/conf/__init__.py", line 170, in __init__
           mod = importlib.import_module(self.SETTINGS_MODULE)
         File "/app/.heroku/python/lib/python3.8/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 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 "/tmp/build_067d1d45/food_deliveryapp/settings.py", line 22, in <module>
           SECRET_KEY = os.environ.get('KEY',env('SECRET_KEY'))
         File "/app/.heroku/python/lib/python3.8/site-packages/environ/environ.py", line 127, in __call__
           return self.get_value(var, cast=cast, default=default, parse_default=parse_default)
         File "/app/.heroku/python/lib/python3.8/site-packages/environ/environ.py", line 281, in get_value
           raise ImproperlyConfigured(error_msg)
       django.core.exceptions.ImproperlyConfigured: Set the SECRET_KEY environment variable
 !     Error while running '$ python manage.py collectstatic --noinput'.
       See traceback above for details.
       You may need to update application code to resolve this error.
       Or, you can disable collectstatic for this application:
          $ heroku config:set DISABLE_COLLECTSTATIC=1
       https://devcenter.heroku.com/articles/django-assets
 !     Push rejected, failed to compile Python app.
 !     Push failed

- Atif Shafi

Answer 1

对于.env中的每个变量，请创建一个配置变量(Config Var)，确保名称为大写。

在您的代码中，您可以通过environ（具有所有环境变量的映射）访问它们：

my_secret = (os.environ.get("MY_SECRET", 'dev default value')

- Beppe C