add endpoints for identifiers

backend/handler/database/collections_handler.py

@@ -169,20 +169,17 @@ class DBCollectionsHandler(DBBaseHandler):
         self,
         type: str,
         limit: int | None = None,
-        only_fields: Sequence[QueryableAttribute] | None = None,
         session: Session = None,  # type: ignore
     ) -> Sequence[VirtualCollection]:
-        return (
-            session.scalars(
-                select(VirtualCollection)
-                .filter(or_(VirtualCollection.type == type, literal(type == "all")))
-                .limit(limit)
-                .order_by(VirtualCollection.name.asc())
-            )
-            .unique()
-            .all()
+        query = (
+            select(VirtualCollection)
+            .filter(or_(VirtualCollection.type == type, literal(type == "all")))
+            .limit(limit)
+            .order_by(VirtualCollection.name.asc())
         )
 
+        return session.scalars(query).unique().all()
+
     # Smart collections
     @begin_session
     def add_smart_collection(
@@ -233,6 +230,9 @@ class DBCollectionsHandler(DBBaseHandler):
         if updated_after:
             query = query.filter(SmartCollection.updated_at > updated_after)
 
+        if only_fields:
+            query = query.options(load_only(*only_fields))
+
         return session.scalars(query).unique().all()
 
     @begin_session

backend/handler/database/roms_handler.py

@@ -1061,7 +1061,7 @@ class DBRomsHandler(DBBaseHandler):
         rom_id: int,
         user_id: int,
         public_only: bool = False,
-        search: str = "",
+        search: str | None = "",
         tags: list[str] | None = None,
         only_fields: Sequence[QueryableAttribute] | None = None,
         session: Session = None,  # type: ignore