Django:根据URL在settings.py中动态设置SITE_ID？

Question

什么是基于URL中的域名在settings.py中动态设置SIDE_ID的好方法？

我有一个应用程序将运行太多的域名(基于城市),每个域的自定义settings.py文件是不可行的.

有没有办法动态设置它？

Answer 1

您可以执行自定义中间件来读取请求并设置SITE_ID.我在我的一个网站上使用此代码:

class SiteMiddleware(object):
    def process_request(self, request):
        try:
            current_site = Site.objects.get(domain=request.get_host())
        except Site.DoesNotExist:
            current_site = Site.objects.get(id=settings.DEFAULT_SITE_ID)

        request.current_site = current_site
        settings.SITE_ID = current_site.id

您应该查看Django关于中间件的文档,了解如何添加自己的中间件.https://docs.djangoproject.com/en/dev/topics/http/middleware/

Answer 2

中间件代码形式似乎发生了变化。当前（Django v3.1）形式的代码（似乎有效）：

from django.conf import settings
from django.contrib.sites.models import Site

class DynamicSiteDomainMiddleware:

    def __init__(self, get_response):
        self.get_response = get_response
        # One-time configuration and initialization.

    def __call__(self, request):
        try:
            current_site = Site.objects.get(domain=request.get_host())
        except Site.DoesNotExist:
            current_site = Site.objects.get(id=settings.DEFAULT_SITE_ID)

        request.current_site = current_site
        settings.SITE_ID = current_site.id


        response = self.get_response(request)
        return response