Multiple authentication servers are configured and therefore must provide a backend argument or set a backend attribute for the user

Question

First off, I'm new to Django / Python.

I am trying to create a login website that allows the user to register an account and verify by email or directly log in via FB or Google (Oauth)

I get an error when I click on the confirmation URL sent by email.

error:

ValueError at /activate/Mjk/4p1-dcc5f7ed2e7c847fe362/

You have multiple authentication backends configured and therefore must 

provide the 'backend' argument or set the 'backend' attribute on the user.

Request Method: GET

Request URL:    http://127.0.0.1:8000/activate/Mjk/4p1-dcc5f7ed2e7c847fe362/
Django Version: 1.11.3

Exception Type: ValueError

Exception Value:    

You have multiple authentication backends configured and therefore must provide the 'backend' argument or set the 'backend' attribute on the user.
Exception Location: /usr/local/lib/python2.7/dist-packages/django/contrib/auth/__init__.py in login, line 149
Python Executable:  /usr/bin/python
Python Version: 2.7.12
Python Path:    
['/home/gaby/django projects/simple-signup-master/profile-model',
 '/usr/local/lib/python2.7/dist-packages/virtualenv-15.1.0-py2.7.egg',
 '/usr/lib/python2.7',
 '/usr/lib/python2.7/plat-x86_64-linux-gnu',
 '/usr/lib/python2.7/lib-tk',
 '/usr/lib/python2.7/lib-old',
 '/usr/lib/python2.7/lib-dynload',
 '/home/gaby/.local/lib/python2.7/site-packages',
 '/usr/local/lib/python2.7/dist-packages',
 '/usr/lib/python2.7/dist-packages',
 '/usr/lib/python2.7/dist-packages/PILcompat',
 '/usr/lib/python2.7/dist-packages/gtk-2.0',
 '/usr/lib/python2.7/dist-packages/ubuntu-sso-client']
Server time:    Wed, 30 Aug 2017 12:34:31 +0000

Mysite / settings

AUTHENTICATION_BACKENDS = (

 'social_core.backends.facebook.FacebookOAuth2',
 'social_core.backends.google.GoogleOAuth2',

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

)

this function is called when an error is received

    def activate(request, uidb64, token):
    try:
    uid = force_text(urlsafe_base64_decode(uidb64))
    user = User.objects.get(pk=uid)
    except (TypeError, ValueError, OverflowError, User.DoesNotExist):
    user = None

    if user is not None and account_activation_token.check_token(user, 
    token):
    user.is_active = True
    user.profile.email_confirmed = True
    user.save()
    login(request, user)
    return redirect('home')
else:
    return render(request, 'account_activation_invalid.html')

fb, google. 'social_core.backends.facebook.FacebookOAuth2', 'social_core.backends.google.GoogleOAuth2' AUTHENTICATION_BACKENDS, .

, , , , .

Answer 1

. .

def activate(request, uidb64, token, backend='django.contrib.auth.backends.ModelBackend'):
    try:
        uid = force_text(urlsafe_base64_decode(uidb64))
        user = User.objects.get(pk=uid)
    except (TypeError, ValueError, OverflowError, User.DoesNotExist):
        user = None

    if user is not None and account_activation_token.check_token(user, token):
        user.is_active = True
        user.profile.email_confirmed = True
        user.save()
        login(request, user, backend='django.contrib.auth.backends.ModelBackend')
        return redirect('home')
    else:
        return render(request, 'account_activation_invalid.html')

Answer 2

. login(request, user, backend='django.contrib.auth.backends.ModelBackend')

:

# register.py
from django.contrib.auth.models import User
cfg_user = 'user'
user = User.objects.create_user(username=cfg_user,
                                 email='[e-mail]',
                                 password='password')
print('registered user '+cfg_user)

# register.sh
python manage.py shell < register.py

Answer 3

django PasswordResetConfirmView, , :

post_reset_login_backend = "django.contrib.auth.backends.RemoteUserBackend"

:

from django.contrib.auth import views

class PasswordResetConfirmView(views.PasswordResetConfirmView):
    template_name = "reset_confirm.html"
    success_url = "/"
    post_reset_login = True
    post_reset_login_backend = "django.contrib.auth.backends.RemoteUserBackend"

Answer 4

In my case, simply assigning some inner class from the Django configuration to the user works correctly:

setattr(user, 'backend', 'django.contrib.auth.backends.RemoteUserBackend')

and then you can authenticate your user

Answer 5

These are all unsatisfactory solutions. Is this really the only way to do it now?