updating the middleware and context_processor

Chapter04/bookmarks/bookmarks/settings.py

@@ -49,6 +49,7 @@
     'django.contrib.auth.middleware.AuthenticationMiddleware',
     'django.contrib.messages.middleware.MessageMiddleware',
     'django.middleware.clickjacking.XFrameOptionsMiddleware',
+    'social_django.middleware.SocialAuthExceptionMiddleware',  # for social authentication
 ]
 
 ROOT_URLCONF = 'bookmarks.urls'
@@ -64,6 +65,8 @@
                 'django.template.context_processors.request',
                 'django.contrib.auth.context_processors.auth',
                 'django.contrib.messages.context_processors.messages',
+                'social_django.context_processors.backends',  # for social authentication
+                'social_django.context_processors.login_redirect',  # for social authentication
             ],
         },
     },

Chapter06/bookmarks/account/models.py

@@ -1,7 +1,9 @@
 from django.db import models
 from django.conf import settings
 from django.contrib.auth import get_user_model
-
+from django.contrib.auth.models import User
+from django.db.models.signals import post_save
+from django.dispatch import receiver
 
 class Profile(models.Model):
     user = models.OneToOneField(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
@@ -11,7 +13,18 @@ class Profile(models.Model):
     def __str__(self):
         return f'Profile for user {self.user.username}'
 
+@receiver(post_save, sender=User)
+def create_user_profile(sender, instance, created, **kwargs):
+    if created:
+        Profile.objects.create(user=instance)
+
+
+@receiver(post_save, sender=User)
+def save_user_profile(sender, instance, **kwargs):
+    instance.profile.save()    
+
 
+
 class Contact(models.Model):
     user_from = models.ForeignKey('auth.User',
                                   related_name='rel_from_set',