修复优惠券为空时的 bug

@@ -92,7 +92,7 @@ function getCouponHandle(coupons) {
 
     // 第一页张数为 0 ，显示优惠券为空
     if (!coupons.length && page === 2) {
-        $('.select-coupon-page').html($('#tmpl-no-coupon').html());
+        $('.coupin-wrap').html($('#tmpl-no-coupon').html());
         return;
     }
 

@@ -4,9 +4,11 @@
         <input type="text" name="couponCode" value="" placeholder="输入优惠券码">
         <button type="submit" class="submit">确定</button>
     </form>
-    <div id="coupon-list" class="coupon-list"></div>
-    <div class="not-avaliable-coupon-line hide">不可使用的优惠券</div>
-    <div id="coupon-list-not" class="coupon-list"></div>
+    <div class="coupin-wrap">
+        <div id="coupon-list" class="coupon-list"></div>
+        <div class="not-avaliable-coupon-line hide">不可使用的优惠券</div>
+        <div id="coupon-list-not" class="coupon-list"></div>
+    </div>
 </div>
 <script id="tmpl-coupon" type="text/tmpl">
 \{{#coupons}}

@@ -49,7 +49,7 @@ class IndexController extends AbstractAction
         // 渲染模板
         $this->_view->display('index', $data);
     }
-    
+
     /*
      * 异步获取购物车数据
      */
@@ -359,7 +359,7 @@ class IndexController extends AbstractAction
         }
 
         if (empty($result)) {
-            echo ' ';
+            echo '[]';
         } else {
             $this->echoJson($result);
         }