fix: Propagate parent_class_enum when it is not the system get_object_properties() and iterate_properties() reject valid properties when parent_class_enum is not System.

src/plexosdb/db.py

@@ -3343,7 +3343,9 @@ def iterate_properties(
         if property_names:
             check_collection = collection or (get_default_collection(class_enum) if class_enum else None)
             props = (
-                self._validate_properties(property_names, check_collection, class_enum)
+                self._validate_properties(
+                    property_names, check_collection, class_enum, parent_class=parent_class
+                )
                 if check_collection and class_enum
                 else normalize_names(property_names)
             )
@@ -4348,11 +4350,16 @@ def _validate_and_filter_objects(
         return valid_names
 
     def _validate_properties(
-        self, property_names: str | Iterable[str], collection: CollectionEnum, class_enum: ClassEnum
+        self,
+        property_names: str | Iterable[str],
+        collection: CollectionEnum,
+        class_enum: ClassEnum,
+        *,
+        parent_class: ClassEnum | None = None,
     ) -> list[str]:
         """Validate properties exist for collection and return normalized list."""
         props = normalize_names(property_names)
-        if not self.check_property_exists(collection, class_enum, props):
+        if not self.check_property_exists(collection, class_enum, props, parent_class=parent_class):
             msg = (
                 f"Invalid property {props} for collection={collection}. "
                 "Use `list_valid_properties()` to check valid properties."

tests/test_plexosdb_iterate_properties.py

@@ -105,3 +105,45 @@ def test_iterate_properties_yields_property_records(db_thermal_gen: PlexosDB) ->
     assert len(results) > 0
     for record in results:
         assert isinstance(record, dict)
+
+
+def test_iterate_properties_with_non_system_parent_class(
+    db_with_reserve_collection_property: PlexosDB,
+) -> None:
+    """Test that parent_class context is propagated for property validation."""
+    from plexosdb import ClassEnum, CollectionEnum
+
+    db = db_with_reserve_collection_property
+
+    results = list(
+        db.iterate_properties(
+            class_enum=ClassEnum.Region,
+            object_names="region-01",
+            property_names=["Load Risk"],
+            parent_class=ClassEnum.Reserve,
+            collection=CollectionEnum.Regions,
+        )
+    )
+
+    assert len(results) == 1
+    assert results[0]["property"] == "Load Risk"
+
+
+def test_get_object_properties_with_non_system_parent_class(
+    db_with_reserve_collection_property: PlexosDB,
+) -> None:
+    """Test that get_object_properties respects parent_class_enum for validation."""
+    from plexosdb import ClassEnum, CollectionEnum
+
+    db = db_with_reserve_collection_property
+
+    props = db.get_object_properties(
+        ClassEnum.Region,
+        "region-01",
+        property_names=["Load Risk"],
+        parent_class_enum=ClassEnum.Reserve,
+        collection_enum=CollectionEnum.Regions,
+    )
+
+    assert len(props) == 1
+    assert props[0]["property"] == "Load Risk"