updated logic in oidc backend authenticate to not override with blank first_name/last_name

src/djangooidc/backends.py

@@ -46,8 +46,19 @@ class OpenIdConnectBackend(ModelBackend):
                 # defaults _will_ be updated, these are not fallbacks
                 "defaults": openid_data,
             }
-            user, created = UserModel.objects.update_or_create(**args)
+
-            if created:
+            user, created = UserModel.objects.get_or_create(**args)
+
+            if not created:
+                # User already exists, update other fields without overwriting first_name and last_name
+                # overwrite first_name and last_name if not empty string
+                for key, value in args["defaults"].items():
+                    # Check if the key is not first_name or last_name or value is not empty string
+                    if key not in ['first_name', 'last_name'] or value != "":
+                        setattr(user, key, value)
+                user.save()
+            else:
+                # If user is created, configure the user
                 user = self.configure_user(user, **kwargs)
         else:
             try:

src/djangooidc/views.py

@@ -83,9 +83,7 @@ def login_callback(request):
             user_in_db = User.objects.get(username=userinfo["sub"])
             
             if user_in_db:
-                logger.info(f"This user exists in the DB (before authenticate): {user_in_db.first_name}")
+                logger.info(f"This user exists in the DB (before authenticate): {user_in_db.first_name} {user_in_db.last_name}")
-                userinfo["given_name"] = user_in_db.first_name
-                userinfo["family_name"] = user_in_db.last_name
         except:
             pass