Small code cleanup

misago/models/changemodel.py

@@ -24,38 +24,38 @@ class Change(models.Model):
 
 
 def rename_user_handler(sender, **kwargs):
-    Change.objects.filter(user=sender).update(
-                                              user_name=sender.username,
-                                              user_slug=sender.username_slug,
-                                              )
+    sender.change_set.update(
+                             user_name=sender.username,
+                             user_slug=sender.username_slug,
+                            )
 rename_user.connect(rename_user_handler, dispatch_uid="rename_user_changes")
 
 
 def move_forum_content_handler(sender, **kwargs):
-    Change.objects.filter(forum=sender).update(forum=kwargs['move_to'])
+    sender.change_set.update(forum=kwargs['move_to'])
 
 move_forum_content.connect(move_forum_content_handler, dispatch_uid="move_forum_changes")
 
 
 def move_thread_handler(sender, **kwargs):
-    Change.objects.filter(thread=sender).update(forum=kwargs['move_to'])
+    sender.change_set.update(forum=kwargs['move_to'])
 
 move_thread.connect(move_thread_handler, dispatch_uid="move_thread_changes")
 
 
 def merge_thread_handler(sender, **kwargs):
-    Change.objects.filter(thread=sender).update(thread=kwargs['new_thread'])
+    sender.change_set.update(thread=kwargs['new_thread'])
 
 merge_thread.connect(merge_thread_handler, dispatch_uid="merge_threads_changes")
 
 
 def move_posts_handler(sender, **kwargs):
-    Change.objects.filter(post=sender).update(forum=kwargs['move_to'].forum, thread=kwargs['move_to'])
+    sender.change_set.update(forum=kwargs['move_to'].forum, thread=kwargs['move_to'])
 
 move_post.connect(move_posts_handler, dispatch_uid="move_posts_changes")
 
 
 def merge_posts_handler(sender, **kwargs):
-    Change.objects.filter(post=sender).update(post=kwargs['new_post'])
+    sender.change_set.update(post=kwargs['new_post'])
 
 merge_post.connect(merge_posts_handler, dispatch_uid="merge_posts_changes")