diff --git a/webapp/controller/BagController.class.php b/webapp/controller/BagController.class.php
index 2e4d03d..86080cf 100644
--- a/webapp/controller/BagController.class.php
+++ b/webapp/controller/BagController.class.php
@@ -56,7 +56,7 @@ class BagController extends BaseAuthedController {
             return;
         }
         $itemDb = Bag::find($itemId);
-        if (isset($itemDb) || $itemDb['item_num'] <= 0) {
+        if (!isset($itemDb) || $itemDb['item_num'] <= 0) {
             $this->_rspErr(1, '道具不足');
             return;
         }
@@ -90,7 +90,7 @@ class BagController extends BaseAuthedController {
             $this->_rspErr(5, '参数错误名字长度不得小于3');
             return;
         }
-        if (mb_strlen($param1) > 7) {
+        if (mb_strlen($param1, 'utf8') > 7) {
             $this->_rspErr(5, '参数错误名字长度不得大于7');
             return;
         }
@@ -99,7 +99,7 @@ class BagController extends BaseAuthedController {
             $this->_rspErr(5, '参数错误名,签名校验失败');
             return;
         }
-        if (!$nameService->nameUsed($param1)){
+        if ($nameService->nameUsed($param1)){
             $this->_rspErr(6, '名字已被占用');
             return;
         }
@@ -109,7 +109,7 @@ class BagController extends BaseAuthedController {
             return;
         }
         $this->_updateUserInfo(array(
-            'name' => $name
+            'name' => $param1
         ));
         $this->_decItems(array(
             array(