fix #162 - Changing Username doesn't update the User model username

users/signals.py

@@ -16,14 +16,15 @@ def create_profile(sender, instance, created, **kwargs):
 
 
 def update_profile(sender, instance, created, **kwargs):
-    user_profile, _ = UserProfile.objects.get_or_create(user=instance)
+    user = instance.user
     if created == False:
 
-        user_profile.username = instance.username
+        user.username = instance.username
 
         #instance.userprofile.email = instance.email
-        user_profile.save()
+
+        user.save()
         print('Profile updated!')
 
 post_save.connect(create_profile, sender=User)
-post_save.connect(update_profile, sender=User)
+post_save.connect(update_profile, sender=UserProfile)

users/views.py

@@ -11,6 +11,7 @@
 # from django.contrib.sites.shortcuts import get_current_site
 from django.core.mail import EmailMessage
 from django.db.models import Q , Count
+from django.http import request
 from django.template.loader import render_to_string
 from django.utils.encoding import force_bytes
 from django.utils.http import urlsafe_base64_decode, urlsafe_base64_encode
@@ -239,6 +240,12 @@ class UserProfileUpdate(APIView):
 
 
     def patch(self, *args, **kwargs):
+        username = self.request.data.get('username')
+
+        # this makes sure that there is no IntegrityError
+        if User.objects.filter(username=username).exists() and username != self.request.user.username:
+            return Response( {'success': False, 'message': 'User with that username already exists'},status=400)
+
         profile = self.request.user.userprofile
         serializer = self.serializer_class(
             profile, data=self.request.data, partial=True)