using None serialization

Author: Andrei Neagu

services/director-v2/src/simcore_service_director_v2/modules/osparc_variables/substitutions.py

@@ -253,7 +253,7 @@ async def resolve_and_substitute_session_variables_in_specs(
                     project_id=project_id,
                     node_id=node_id,
                     run_id=service_run_id,
-                    wallet_id="" if wallet_id is None else wallet_id,
+                    wallet_id=wallet_id,
                     api_server_base_url=app_settings.DIRECTOR_V2_PUBLIC_API_BASE_URL,
                 ),
             )

services/director-v2/tests/unit/test_modules_osparc_variables.py

@@ -195,7 +195,7 @@ async def test_resolve_and_substitute_session_variables_in_specs(
     print("REPLACED SPECS\n", replaced_specs)
 
     assert OSPARC_IDENTIFIER_PREFIX not in f"{replaced_specs}"
-    assert f"{'' if wallet_id is None else wallet_id}" in f"{replaced_specs}"
+    assert f"'wallet_id': '{wallet_id}'" in f"{replaced_specs}"
 
 
 @pytest.fixture