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21390 skip m2m processing for internal models to avoid extraneous ObjectChange records

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Arthur
2026-02-12 14:30:19 -08:00
parent 0bb22dee0c
commit 213a40e98b
1 changed files with 22 additions and 16 deletions
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38
netbox/core/signals.py
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@@ -209,22 +209,28 @@ def handle_deleted_object(sender, instance, **kwargs):
# for the forward direction of the relationship, ensuring that the change is recorded.
# Similarly, for many-to-one relationships, we set the value on the related object to None
# and save it to trigger a change record on that object.
for relation in instance._meta.related_objects:
if type(relation) not in [ManyToManyRel, ManyToOneRel]:
continue
related_model = relation.related_model
related_field_name = relation.remote_field.name
if not issubclass(related_model, ChangeLoggingMixin):
# We only care about triggering the m2m_changed signal for models which support
# change logging
continue
for obj in related_model.objects.filter(**{related_field_name: instance.pk}):
obj.snapshot() # Ensure the change record includes the "before" state
if type(relation) is ManyToManyRel:
getattr(obj, related_field_name).remove(instance)
elif type(relation) is ManyToOneRel and relation.null and relation.on_delete not in (CASCADE, RESTRICT):
setattr(obj, related_field_name, None)
obj.save()
#
# Skip this for private models (e.g. CablePath) whose lifecycle is an internal
# implementation detail. Django's on_delete handlers (e.g. SET_NULL) already take
# care of the database integrity; recording changelog entries for the related
# objects would be spurious. (Ref: #21390)
if not getattr(instance, '_netbox_private', False):
for relation in instance._meta.related_objects:
if type(relation) not in [ManyToManyRel, ManyToOneRel]:
continue
related_model = relation.related_model
related_field_name = relation.remote_field.name
if not issubclass(related_model, ChangeLoggingMixin):
# We only care about triggering the m2m_changed signal for models which support
# change logging
continue
for obj in related_model.objects.filter(**{related_field_name: instance.pk}):
obj.snapshot() # Ensure the change record includes the "before" state
if type(relation) is ManyToManyRel:
getattr(obj, related_field_name).remove(instance)
elif type(relation) is ManyToOneRel and relation.null and relation.on_delete not in (CASCADE, RESTRICT):
setattr(obj, related_field_name, None)
obj.save()
# Enqueue the object for event processing
queue = events_queue.get()