django.contrib.auth login() 返回无问题

Question

I am new to django and I have been trying to implement login system for my django project.

    template_name = 'rest_framework/login.html'
    if request.method == 'POST':
        email = request.POST['username']
        password = request.POST['password']
        user = authenticate(request, username=email, password=password)
        print (login(request,user))
        login(request,user)
        return redirect('core:home')
    return render(request, template_name)

For some reason, the login function which I have imported from django.contrib.auth is returning None even when user has the correct user object after authenticating and request has POST request object. This is resulting in the user not getting added to the session and hence when I redirect it to core:home , I am getting AnonymousUser in request.user. Help would be appreciated.

PS: I have written a custom backend for authentication.

Answer 1

Actually login() method hasn't a return type. You must check result of authenticate() method before. If authentication is failed, authenticate() method returns None. In this situation means that, there is no user with provided username and password. So if result of authenticate() is None, you can give warning and don't call login() method.