Fixes #4227: Omit internal fields from the change log data

netbox/dcim/models/__init__.py

@@ -20,10 +20,10 @@ from dcim.choices import *
 from dcim.constants import *
 from dcim.fields import ASNField
 from dcim.elevations import RackElevationSVG
-from extras.models import ConfigContextModel, CustomFieldModel, TaggedItem
+from extras.models import ConfigContextModel, CustomFieldModel, ObjectChange, TaggedItem
 from utilities.fields import ColorField, NaturalOrderingField
 from utilities.models import ChangeLoggedModel
-from utilities.utils import to_meters
+from utilities.utils import serialize_object, to_meters
 from .device_component_templates import (
     ConsolePortTemplate, ConsoleServerPortTemplate, DeviceBayTemplate, FrontPortTemplate, InterfaceTemplate,
     PowerOutletTemplate, PowerPortTemplate, RearPortTemplate,
@@ -118,6 +118,15 @@ class Region(MPTTModel, ChangeLoggedModel):
             Q(region__in=self.get_descendants())
         ).count()
 
+    def to_objectchange(self, action):
+        # Remove MPTT-internal fields
+        return ObjectChange(
+            changed_object=self,
+            object_repr=str(self),
+            action=action,
+            object_data=serialize_object(self, exclude=['level', 'lft', 'rght', 'tree_id'])
+        )
+
 
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