fix: Disallow None id encoding in AsyncNode.to_global_id() (#2898)

Backported-from: main
Backported-to: 24.03
Backported-of: 2898

changes/2898.fix.md

@@ -0,0 +1 @@
+Disallow `None` id encoding in `AsyncNode.to_global_id()`.

src/ai/backend/manager/models/gql_relay.py

@@ -92,8 +92,10 @@ async def node_resolver(cls, only_type, root, info, id):
         return await cls.get_node_from_global_id(info, id, only_type=only_type)
 
     @staticmethod
-    def to_global_id(type_, id) -> str:
-        return base64(f"{type_}:{id}")
+    def to_global_id(type_, id_) -> str:
+        if id_ is None:
+            raise Exception("Encoding None value as Global ID is not allowed.")
+        return base64(f"{type_}:{id_}")
 
     @classmethod
     def resolve_global_id(cls, info, global_id: str) -> tuple[str, str]: