Magento中如何调用SQL语句

I. 创建表结构和测试数据

create table rooms(id int not null auto_increment, name varchar(100), primary key(id));
insert into rooms values(1,'Royal Room');
insert into rooms values(2,'Standard Room');

II.创建 controllers/RoomController.php:

源码打印？

1. <?php  
2.     class Cartz_Hotel_RoomController extends Mage_Core_Controller_Front_Action{  
3.        public function listingAction() {  
4.           $handle = Mage::getSingleton('core/resource')->getConnection('core_write');  
5.   
6.           $query  = $handle->query('select name from rooms');  
7.           while ($row = $query->fetch()) {  
8.              $row = new Varien_Object($row);  
9.              echo "<strong>" . $row->getName() . "</strong><br/>";  
10.           }  
11.   
12.        }  
13. }?>  

在地址栏中输入: http://localhost/magento/index.php/hotel/room/listing, 页面将输出:

Royal Room

Standard Room

/******************获取当前路径************************/
$urlRequest = Mage::app()->getFrontController()->getRequest();
    $urlPart = $urlRequest->getServer('ORIG_PATH_INFO');
    if(is_null($urlPart)) {
    $urlPart = $urlRequest->getServer('PATH_INFO');
    }
    $urlPart = substr($urlPart, 1 );
    $currentUrl = $this->getUrl($urlPart);
/******************获取当前路径************************/