diff --git a/webapp/controller/ShopController.class.php b/webapp/controller/ShopController.class.php
index f227cdcf..ad84e0df 100644
--- a/webapp/controller/ShopController.class.php
+++ b/webapp/controller/ShopController.class.php
@@ -1266,6 +1266,9 @@ class ShopController extends BaseAuthedController
         $costItemId = $this->getCostItemIdByTokenType($token_type);
 
         $costItems = $this->makeCostItems($costItemId, $count * $need_price);
+        
+        error_log("buyGoodsDS costItems " . json_encode($costItems));
+
         $lackItem = null;
         if (!$this->_hasEnoughItems($costItems, $lackItem)) {
             $this->_rspErr(2, $this->_getLackItemErrMsg($lackItem));