如何使django全局可用

# 在任何地方都可以这样访问设置
from django.conf import settings

print(settings.SOME_GLOBAL_SETTING)

# myapp/middleware.py
class GlobalMiddleware:
    def __init__(self, get_response):
        self.get_response = get_response

    def __call__(self, request):
        # 在请求处理之前执行的代码
        request.global_var = "Some global data"
        response = self.get_response(request)
        # 在响应返回之前执行的代码
        return response

# settings.py
MIDDLEWARE = [
    # ...
    'myapp.middleware.GlobalMiddleware',
    # ...
]

# myapp/signals.py
from django.db.models.signals import post_save
from django.dispatch import receiver
from myapp.models import MyModel

@receiver(post_save, sender=MyModel)
def my_handler(sender, instance, **kwargs):
    # 处理模型保存后的逻辑
    pass

# myapp/apps.py
from django.apps import AppConfig

class MyAppConfig(AppConfig):
    name = 'myapp'

    def ready(self):
        import myapp.signals

# myapp/globals.py
GLOBAL_DATA = "Some data"

# 在其他地方导入使用
from myapp.globals import GLOBAL_DATA

# myapp/context_processors.py
def global_context(request):
    return {'global_var': 'Some data'}

# settings.py
TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [],
        'APP_DIRS': True,
        'OPTIONS': {
            'context_processors': [
                # ...
                'myapp.context_processors.global_context',
            ],
        },
    },
]