第二次提交

application/home/controller/Index.php

@@ -30,6 +30,7 @@ class Index extends Base {
         $sql = "select a.goods_name,a.goods_id,a.shop_price,a.market_price,a.cat_id,b.parent_id_path,b.name from ".C('database.prefix')."goods as a left join ";
         $sql .= C('database.prefix')."goods_category as b on a.cat_id=b.id where a.is_hot=1 and a.is_on_sale=1 order by a.sort";//二级分类下热卖商品       
         $index_hot_goods = S('index_hot_goods');
+        //如果缓存没有index_hot_goods那么用$sql数据库查询首页也买商品
         if(empty($index_hot_goods))
         {
             $index_hot_goods = Db::query($sql);//首页热卖商品