Decorate the login view with login_not_required on Django 5.1+

CHANGELOG.md

@@ -6,6 +6,8 @@
 
 ### Added
 - Support confirmation for Django 5.1.
+- The login view is also decorated with the `login_not_required` decorator for
+  projects using the new `LoginRequiredMiddleware` available with Django 5.1+.
 
 ### Removed
 - Dropped support for Django <4.2.

tests/test_views_login.py

@@ -1,13 +1,13 @@
 import json
 from importlib import import_module
 from time import sleep
-from unittest import mock
+from unittest import mock, skipUnless
 
 from django.conf import settings
 from django.core.signing import BadSignature
 from django.shortcuts import resolve_url
 from django.test import RequestFactory, TestCase
-from django.test.utils import override_settings
+from django.test.utils import modify_settings, override_settings
 from django.urls import reverse
 from django_otp import DEVICE_ID_SESSION_KEY
 from django_otp.oath import totp
@@ -18,12 +18,27 @@
 
 from .utils import UserMixin, totp_str
 
+try:
+    from django.contrib.auth.middleware import LoginRequiredMiddleware  # NOQA
+    has_login_required_middleware = True
+except ImportError:
+    # Django < 5.1
+    has_login_required_middleware = False
+
 
 class LoginTest(UserMixin, TestCase):
     def _post(self, data=None):
         return self.client.post(reverse('two_factor:login'), data=data)
 
-    def test_form(self):
+    def test_get_to_login(self):
+        response = self.client.get(reverse('two_factor:login'))
+        self.assertContains(response, 'Password:')
+
+    @skipUnless(has_login_required_middleware, 'LoginRequiredMiddleware needs Django 5.1+')
+    @modify_settings(
+        MIDDLEWARE={'append': 'django.contrib.auth.middleware.LoginRequiredMiddleware'}
+    )
+    def test_get_to_login_with_loginrequiredmiddleware(self):
         response = self.client.get(reverse('two_factor:login'))
         self.assertContains(response, 'Password:')
 

two_factor/views/core.py

@@ -51,12 +51,27 @@
     validate_remember_device_cookie,
 )
 
+try:
+    from django.contrib.auth.decorators import login_not_required
+except ImportError:
+    # For Django < 5.1, copy the current Django implementation
+    def login_not_required(view_func):
+        """
+        Decorator for views that allows access to unauthenticated requests.
+        """
+        view_func.login_required = False
+        return view_func
+
+
 logger = logging.getLogger(__name__)
 
 REMEMBER_COOKIE_PREFIX = getattr(settings, 'TWO_FACTOR_REMEMBER_COOKIE_PREFIX', 'remember-cookie_')
 
 
-@method_decorator([sensitive_post_parameters(), csrf_protect, never_cache], name='dispatch')
+@method_decorator(
+    [login_not_required, sensitive_post_parameters(), csrf_protect, never_cache],
+    name='dispatch'
+)
 class LoginView(RedirectURLMixin, IdempotentSessionWizardView):
     """
     View for handling the login process, including OTP verification.