自定义身份验证 django

我有一个名为cAdmin的应用程序，用于公司用户管理.并让Django超级用户创建该公司管理员，该管理员也存储在User Model中.我有一个名为MyCustomAuthBackend的自定义后端，它只判断CompanyAdmin model凭据.但问题是，每当我try 使用User型号的凭据登录时，也允许使用.我发现的原因是，如果第一个后端出现故障，它会跳转到下一个后端，即ModelBackend.在这个特定的APP cAdmin中，当第一个后端无法跳转到第二个后端时如何停止.

from django.contrib.auth.backends import BaseBackend
from .models import CompanyAdmin
from django.contrib.auth.hashers import make_password,check_password

class MyCustomAuthBackend(BaseBackend):
    def authenticate(self, request, username=None, password=None, **kwargs):
        try:
            user = CompanyAdmin.objects.get(adminName=username)
            print(user.adminPassword,"      ",make_password(password))
            if check_password(password, user.adminPassword):
                print("worked password", user.adminPassword, password)
                #user.is_authenticated = True
                print(user,"printer duser")
                return user
            
        except CompanyAdmin.DoesNotExist:
            return None 
        return None

下面给出了观点，

from django.shortcuts import render,HttpResponse
from django.views.decorators.cache import cache_control
from User.models import TicketDetails,Tickets,Category
from cAdmin.decorators import signin_required
#from cAdmin.backends import authenticate
from django.contrib.auth import authenticate,login,logout

@cache_control(no_cache=True, must_revalidate=True, no_store=True) 
def Login(request,id=None):
    if request.method == 'POST':
        username = request.POST['username']
        password = request.POST['password']
        print("login view password")
        user=authenticate(request,username=username,password=password)
        print(user)
        if user:
            print(user)
            login(request,user)
            context = {'LoggedUser': user}
            return render(request,'cAdmin/adminDashboard.html',context) 
        else:
            return render(request, 'cAdmin/index.html',{'flag': 1})

    request.session.flush()
    return render(request, 'cAdmin/index.html',{})

后台的顺序如下所示:

` AUTHENTICATION_BACKEND=[

 'cAdmin.backends.MyCustomAuthBackend',
 'django.contrib.auth.backends.ModelBackend',

]``

我刚刚使用了一个由chat GPT生成的中间件，但该中间件无法工作

from django.contrib.auth.backends import ModelBackend

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

    def __call__(self, request):
        # Check the current app and set the authentication backend accordingly
        if request.path.startswith('/cAdmin/'):
            print("Auth workeeeeeeeeeeeed")
            request.backend = 'cAdmin.backends.MyCustomAuthBackend'
        elif request.path.startswith('/'):

            request.backend = 'django.contrib.auth.backends.ModelBackend'
            print("lhglhflghlfshdglhfdlh")
            

        response = self.get_response(request)
        return response