diff --git a/webapp/controller/ShopController.class.php b/webapp/controller/ShopController.class.php
index fa6cbc6a..d79bf6b4 100644
--- a/webapp/controller/ShopController.class.php
+++ b/webapp/controller/ShopController.class.php
@@ -221,19 +221,9 @@ class ShopController extends BaseAuthedController {
 
     public function queryInAppBalance()
     {
-        $recordDb = InAppRecord::get();
-        $upLimit = mt\Parameter::getVal('inapp_up_limit', 0);
-        if (!$recordDb) {
-            myself()-_rspData(
-                array(
-                    'balance' => $upLimit
-                )
-            );
-            return;
-        }
         myself()-_rspData(
             array(
-                'balance' => max(0, $recordDb ? $upLimit - $recordDb['amount'] : 0)
+                'balance' => $this->getInAppBalance()
             )
         );
     }
@@ -242,6 +232,8 @@ class ShopController extends BaseAuthedController {
     {
         $goodsId = getReqVal('goods_id', 0);
         $goodsNum = getReqVal('goods_num', 0);
+        $balance = $this->getInAppBalance();
+
         $goods = mt\ShopGoods::getByGoodsUuid($goodsId);
         if (!$goods) {
             $this->_rspErr(2, "inapp purchase failed");
@@ -251,11 +243,10 @@ class ShopController extends BaseAuthedController {
             $this->_rspErr(3, "inapp purchase failed");
             return;
         }
-
-        $item_id = $goods['goods_id'];
-        $item_num = $goods['goods_num'] * $goodsNum;
-
-        $conn = $self->_getMysql('');
+        if ($goodsNum != 1) {
+            $this->_rspErr(3, "goods_num error");
+            return;
+        }
 
         $chk = SqlHelper::insert($conn, 't_web2_order', array(
             'status' => 0,
@@ -429,4 +420,11 @@ class ShopController extends BaseAuthedController {
         $cbService->dispatch($action);
     }
 
+    private function getInAppBalance()
+    {
+        $recordDb = InAppRecord::get();
+        $upLimit = mt\Parameter::getVal('inapp_up_limit', 0);
+        return max(0, $recordDb ? $upLimit - $recordDb['amount'] : 0);
+    }
+
 }