Question

在django项目中，我具有以下结构。

我有一个provider.py文件，其中：

from django.conf import settings
from project.utils.firewalls import fw

在提供程序中，我需要获取一些在设置中定义的变量。

然后在firewalls.py中，我有：

from django.conf import settings

在firewalls.py中，我确实有一些代码需要获取在设置中定义的变量。

当我尝试做时： python manage.py --settings = project.settings.local它将抱怨没有定义SECRET_KEY，尽管它已定义。

这与我在两个文件中都导入django.conf.settings有关。

如何避免这种情况？

目前，我已经在firewalls.py中对var的值进行了硬编码，但是我想避免这种情况。

编辑：

添加Stacktrack：

➤ python project/manage.py runserver --settings=project.settings.local               
Traceback (most recent call last):                                                   
  File "project/manage.py", line 15, in <module>                                     
    execute_from_command_line(sys.argv)                                              
  File "/home/bsabin/Projects/repo/venv/lib/python3.7/site-packages/django/core/management/__init__.py", line 381, in execute_from_command_line    
    utility.execute()                                                                
  File "/home/bsabin/Projects/repo/venv/lib/python3.7/site-packages/django/core/management/__init__.py", line 375, in execute    
    self.fetch_command(subcommand).run_from_argv(self.argv)                          
  File "/home/bsabin/Projects/repo/venv/lib/python3.7/site-packages/django/core/management/base.py", line 316, in run_from_argv    
    self.execute(*args, **cmd_options)                                               
  File "/home/bsabin/Projects/repo/venv/lib/python3.7/site-packages/django/core/management/commands/runserver.py", line 60, in execute    
    super().execute(*args, **options)                                                
  File "/home/bsabin/Projects/repo/venv/lib/python3.7/site-packages/django/core/management/base.py", line 353, in execute    
    output = self.handle(*args, **options)                                           
  File "/home/bsabin/Projects/repo/venv/lib/python3.7/site-packages/django/core/management/commands/runserver.py", line 67, in handle    
    if not settings.DEBUG and not settings.ALLOWED_HOSTS:                            
  File "/home/bsabin/Projects/repo/venv/lib/python3.7/site-packages/django/conf/__init__.py", line 57, in __getattr__    
    self._setup(name)                                                                
  File "/home/bsabin/Projects/repo/venv/lib/python3.7/site-packages/django/conf/__init__.py", line 44, in _setup    
    self._wrapped = Settings(settings_module)                                        
  File "/home/bsabin/Projects/repo/venv/lib/python3.7/site-packages/django/conf/__init__.py", line 107, in __init__    
    mod = importlib.import_module(self.SETTINGS_MODULE)                              
  File "/home/bsabin/Projects/repo/venv/lib64/python3.7/importlib/__init__.py", line 127, in import_module    
    return _bootstrap._gcd_import(name[level:], package, level)                      
  File "<frozen importlib._bootstrap>", line 1006, in _gcd_import                    
  File "<frozen importlib._bootstrap>", line 983, in _find_and_load                  
  File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked         
  File "<frozen importlib._bootstrap>", line 677, in _load_unlocked                  
  File "<frozen importlib._bootstrap_external>", line 728, in exec_module            
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed       
  File "/home/bsabin/Projects/repo/project/project/settings/local.py", line 1, in <module>    
    from .base import *                                                              
  File "/home/bsabin/Projects/repo/project/project/settings/base.py", line 21, in <module>    
    from project.utils.providers import AProvider, BProvider, CProvider              
  File "/home/bsabin/Projects/repo/project/project/utils/providers.py", line 6, in <module>    
    from project.utils.firewalls import fw                                           
  File "/home/bsabin/Projects/repo/project/project/utils/firewalls.py", line 29, in <module>    
    fw = get_firewall_instance()                                                     
  File "/home/bsabin/Projects/repo/project/project/utils/firewalls.py", line 11, in get_firewall_instance    
    token = settings.DO_TOKEN.get('token')                                           
  File "/home/bsabin/Projects/repo/venv/lib/python3.7/site-packages/django/conf/__init__.py", line 57, in __getattr__    
    self._setup(name)                                                                
  File "/home/bsabin/Projects/repo/venv/lib/python3.7/site-packages/django/conf/__init__.py", line 44, in _setup    
    self._wrapped = Settings(settings_module)                                        
  File "/home/bsabin/Projects/repo/venv/lib/python3.7/site-packages/django/conf/__init__.py", line 126, in __init__    
    raise ImproperlyConfigured("The SECRET_KEY setting must not be empty.")                                                                                                                                                                                                                                                  
django.core.exceptions.ImproperlyConfigured: The SECRET_KEY setting must not be empty.

Answer 1

我假设您面临的问题是，您正在其他文件中使用函数来提取设置中的某些配置数据，并且在该文件中还导入了设置。在理想情况下，它应该触发循环依赖错误。但是由于django.conf.settings是lazy，它将引发Improper Configuration Error。

如果需要一些变量进行配置，为什么不将变量直接传递给函数。例如：

# in settings:

from project.utils.providers import AProvider, BProvider, CProvider
SOME_VARIABLE = AProvider(token="Your Token")

然后在提供程序内部

class AProvider(...):
   def __init__(self, *args, **kwargs):
        token = kwargs.get('token')
        # rest of the code

  # somewhere in the code
  fw = get_firewall_instance(self.token)

在firewall.py中：

def get_firewall_instance(token_from_settings):

     token = token_from_settings

django配置设置导入问题

1 个答案: