Fixes #5583: Eliminate redundant change records when adding/removing tags

netbox/extras/signals.py

@@ -22,23 +22,35 @@ def _handle_changed_object(request, sender, instance, **kwargs):
     """
     Fires when an object is created or updated.
     """
-    # Queue the object for processing once the request completes
+    m2m_changed = False
+
+    # Determine the type of change being made
     if kwargs.get('created'):
         action = ObjectChangeActionChoices.ACTION_CREATE
     elif 'created' in kwargs:
         action = ObjectChangeActionChoices.ACTION_UPDATE
     elif kwargs.get('action') in ['post_add', 'post_remove'] and kwargs['pk_set']:
         # m2m_changed with objects added or removed
+        m2m_changed = True
         action = ObjectChangeActionChoices.ACTION_UPDATE
     else:
         return
 
     # Record an ObjectChange if applicable
     if hasattr(instance, 'to_objectchange'):
-        objectchange = instance.to_objectchange(action)
-        objectchange.user = request.user
-        objectchange.request_id = request.id
-        objectchange.save()
+        if m2m_changed:
+            ObjectChange.objects.filter(
+                changed_object_type=ContentType.objects.get_for_model(instance),
+                changed_object_id=instance.pk,
+                request_id=request.id
+            ).update(
+                postchange_data=instance.to_objectchange(action).postchange_data
+            )
+        else:
+            objectchange = instance.to_objectchange(action)
+            objectchange.user = request.user
+            objectchange.request_id = request.id
+            objectchange.save()
 
     # Enqueue webhooks
     enqueue_webhooks(instance, request.user, request.id, action)