对于限购商品，如果用户已经用限购码购买过，不能再获取限购码，提示已获取限购吗

Code Review By Rock Zhang

@@ -867,6 +867,9 @@ class DetailModel
                 $data['gotCode'] = true;
                 $data['gotCode'] = true;
                 $data['cartInfo']['limitNotForSale'] = true;
                 $data['cartInfo']['limitNotForSale'] = true;
                 break;
                 break;
+            case 7: // 开售后，用户已经用获得的限购码购买过商品
+                $data['gotCode'] = true;
+                $data['cartInfo']['noLimitCode'] = true;
             default:
             default:
                 break;
                 break;
         }
         }