extensions/signals.py

@@ -101,6 +101,9 @@ def _setup_followers(
 
 @receiver(m2m_changed, sender=Extension.authors.through)
 def _update_authors_follow(instance, action, model, reverse, pk_set, **kwargs):
+    if action not in ['post_add', 'post_remove']:
+        return
+
     if model == Extension and not reverse:
         users = [instance]
         extensions = Extension.objects.filter(pk__in=pk_set)

users/signals.py

@@ -48,6 +48,9 @@ def update_moderator_follows(instance, action, model, reverse, pk_set, **kwargs)
     The flag=Flag.MODERATOR is used to avoid deleting follow relations that were created in contexts
     other than moderator's duties.
     """
+    if action not in ['post_add', 'post_remove']:
+        return
+
     moderators = Group.objects.get(name='moderators')
     extensions = Extension.objects.all()
     users = []