(20241226) Bug fixed when Zerodha's instruments are asked from an expired key.

api/blueprints/finstitutions/trading/symbols/list.py

@@ -193,8 +193,9 @@ async def request_oauth_authorization_url(
     #      ┛
 
     # Handle time data:
-    data = [s.model_dump() for s in symbol_list.data] if symbol_list.data is not None else symbol_list.data
-    for d in data:
+    if symbol_list.data:
+        symbol_list.data = [s.model_dump() for s in symbol_list.data]
+        for d in symbol_list.data:
             expiry_ts = d["expiryTs"]
             if isinstance(expiry_ts, datetime.datetime):
                 d["expiryTs"] = expiry_ts.timestamp()
@@ -203,7 +204,7 @@ async def request_oauth_authorization_url(
     return ResponseModel(
         status_code = StatusCodes.OK if symbol_list.success else StatusCodes.FAILED,
         http_code = HttpCodes.SUCCESS if symbol_list.success else HttpCodes.INTERNAL_SERVER_ERROR,
-        data = data,
+        data = symbol_list.data,
         message = symbol_list.message
     )