diff --git a/webapp/services/ShopService.php b/webapp/services/ShopService.php
index 7b309d60..f5324277 100644
--- a/webapp/services/ShopService.php
+++ b/webapp/services/ShopService.php
@@ -89,10 +89,11 @@ class ShopService {
         $errMsg = '';
         $buyRecordHash = ShopBuyRecord::allToHash();
         $boughtTimes = 1;
+        $goodsId = $goodsMeta['goods_id'];
         {
             switch ($goodsMeta['limit_type']) {
                 case mt\Shop::DAILY_BUY_LIMIT: {
-                        $buyRecord = getXVal($buyRecordHash, $id);
+                        $buyRecord = getXVal($buyRecordHash, $goodsId);
                         $boughtTimes = $buyRecord ? $buyRecord['this_day_buy_times'] + 1 : 1;
                         if ($buyRecord && getXVal($buyRecord, 'this_day_buy_times', 0) >= $goodsMeta['limit_num']) {
                             $this->_rspErr(2, 'Daily purchase limit');
@@ -101,7 +102,7 @@ class ShopService {
                     }
                     break;
                 case mt\Shop::WEEKLY_BUY_LIMIT: {
-                        $buyRecord = getXVal($buyRecordHash, $id);
+                        $buyRecord = getXVal($buyRecordHash, $goodsId);
                         $boughtTimes = $buyRecord ? $buyRecord['this_week_buy_times'] + 1 : 1;
                         if ($buyRecord && getXVal($buyRecord, 'this_week_buy_times', 0) >= $goodsMeta['limit_num']) {
                             $this->_rspErr(2, 'Weekly purchase limit reached');
@@ -110,8 +111,8 @@ class ShopService {
                     }
                     break;
                 case mt\Shop::TOTAL_BUY_LIMIT: {
-                        // error_log("total buy limit " . $address . " " . $id . " " . $goodsMeta['limit_num']);
-                        $buyRecord = getXVal($buyRecordHash, $id);
+                        // error_log("total buy limit " . $address . " " . $goodsId . " " . $goodsMeta['limit_num']);
+                        $buyRecord = getXVal($buyRecordHash, $goodsId);
                         $boughtTimes = $buyRecord ? $buyRecord['total_buy_times'] + 1 : 1;
                         if ($buyRecord && getXVal($buyRecord, 'total_buy_times', 0) >= $goodsMeta['limit_num']) {
                             $this->_rspErr(2, 'Purchase limit reached');