Exclude used_by from the diff but not the hash

backend/infrahub/core/models.py

@@ -529,9 +529,12 @@ def _get_updated_list_value(self, field_name: str, attr_local: list[Any], attr_o
 
         return attr_other
 
+    def _get_field_names_for_diff(self) -> list[str]:
+        return list(self.model_fields.keys())
+
     def diff(self, other: Self) -> HashableModelDiff:
         in_both, local_only, other_only = compare_lists(
-            list1=list(self.model_fields.keys()), list2=list(other.model_fields.keys())
+            list1=self._get_field_names_for_diff(), list2=other._get_field_names_for_diff()
         )
         diff_result = HashableModelDiff(added=dict.fromkeys(local_only), removed=dict.fromkeys(other_only))
 

backend/infrahub/core/schema/generic_schema.py

@@ -12,8 +12,6 @@
 class GenericSchema(GeneratedGenericSchema):
     """A Generic can be either an Interface or a Union depending if there are some Attributes or Relationships defined."""
 
-    _exclude_from_hash: list[str] = ["used_by", "attributes", "relationships"]
-
     @property
     def is_node_schema(self) -> bool:
         return False
@@ -35,3 +33,8 @@ def get_hierarchy_schema(self, db: InfrahubDatabase, branch: Optional[Union[Bran
     def get_labels(self) -> list[str]:
         """Return the labels for this object"""
         return [self.kind]
+
+    def _get_field_names_for_diff(self) -> list[str]:
+        """Exclude used_by from the diff for generic nodes"""
+        fields = super()._get_field_names_for_diff()
+        return [field for field in fields if field not in ["used_by"]]