中间件设置

Question

我正在尝试为我的营销应用程序设置消息中间件，但方法 process_request 没有返回任何内容。运行虽然没有返回消息请求，但仍然没有错误。

我的middleware.py---

from .models import MarketingMessage

class DisplayMarketing():
    def __init__(self, get_response):
        self.get_response = get_response
    def __call__(self, request):
        def process_request(request):
            print("something")
            try:
                request.session['marketing_message'] = MarketingMessage.objects.all()[0].message
            except:
                request.session['marketing_message']  = False
        response = self.get_response(request)
        return response

我的settings.py

MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
    'marketing.middleware.DisplayMarketing',
]

Answer 1

如果你使用middleware mixin process_request 将自动调用。

尝试

from django.utils.deprecation import MiddlewareMixin

class DisplayMarketing(MiddlewareMixin):

    def __init__(self, get_response):
        self.get_response = get_response

    def process_request(self, request):
            print("something")
            try:
                request.session['marketing_message'] = "bossk"
            except:
                request.session['marketing_message']  = False

或者，您可以手动调用 process_request

from .models import MarketingMessage

class DisplayMarketing():
    def __init__(self, get_response):
        self.get_response = get_response

    def __call__(self, request):
        def process_request(request):
            print("something")
            try:
                request.session['marketing_message'] ="bossk"
            except:
                request.session['marketing_message']  = False
        response = self.get_response(process_request(request))
        return response

中间件设置

Middleware Setup

django

middleware