Ecmall系统自带的分页功能

在Ecmall的二次开发中，分页是必不可少的。这个系统已经自带了分页功能，下面来看看如何使用这个分页。

下面是一个自定义的类，用于查看订单的详细情况。关键在于get_order_data()这个方法，分页的使用也在这个方法的内部了。应该有的注释都有了，应该会比较容易懂，我不就多说了。

<?php
define('NUM_PER_PAGE', 15);        // 每页显示数量

class NowaMagicApp extends MallbaseApp  
{  
    public function index()  
    {
        /* 分页信息 */
        $page = $this->_get_page(NUM_PER_PAGE);
        $page['item_count'] = $stats['total_count'];
        $this->_format_page($page);
        $this->assign('page_info', $page);

         $this->display('gorder.index.html');   
    }  
    
    /* 订单记录 */
    function orderslog()
    {
        $goods_id = empty($_GET['id']) ? 0 : intval($_GET['id']);
        if (!$goods_id)
        {
            $this->show_warning('Hacking Attempt');
            return;
        }
        
        $data = $this -> get_order_data($goods_id);
        
        if ($data === false)
        {
            return;
        }
        
        $this->assign('order', $data);

        $this->display('gorder.index.html');

    }
    
    function get_order_data($goods_id)
    {
        //clean_cache();
        $cache_server =& cache_server();
        //print_r($cache_server);
        $key = 'order_' . $goods_id;
        //$key = $this->_get_cache_id();
        $r = $cache_server->get($key);
        $cached = true;
        
        $db = &db();
        
        $sql = "select count(*)
                from shop_order a, shop_order_extm b, shop_order_goods c
                where a.order_id = b.order_id and b.order_id = c.order_id
                and c.goods_id = '".$goods_id."'
                and a.status != '11'
                and a.status != '0'
                and a.status != '20'
                order by a.add_time desc ";
        //echo $sql;
        $num = $db -> getone($sql);                //求出总记录数
        $page = $this->_get_page(NUM_PER_PAGE);    //每页显示的条数，默认是10条
        $page['item_count'] = $num;                // 返回一个数组$page，$page['limit']=0，10
        $this->_format_page($page);                //格式化分页
        
        $sql2 = "select a.order_id, a.buyer_name, a.add_time, a.status, b.phone_tel, b.phone_mob, b.consignee, c.price, c.quantity, c.goods_id 
                from shop_order a, shop_order_extm b, shop_order_goods c
                where a.order_id = b.order_id and b.order_id = c.order_id
                and c.goods_id = '".$goods_id."'
                and a.status != '11'
                and a.status != '0'
                and a.status != '20'
                order by a.add_time desc limit ".$page['limit'];
        
        $result = $db -> query($sql2);
        
        $this -> assign('page_info',$page);     //向模板页传递页数
        $this -> assign('que',$sql2);     //向模板页传递查询结果
        
        //$r = array();
        while($myrow = $db -> fetch_array($result))
        {
            $r[] = $myrow;
        }

        $cache_server->set($key, $r, 1);
        return $r;
    }
    
}

?>

简化如下：

Define("LIMIT",10);
$goods_mod = & db('test');//构建实体模型（操作表）
      $count = 'select count(id) from test';
      $num = $goods_mod -> getone($count);//求出总记录数
      
      $page = $this->_get_page(LIMIT);//每页显示的条数，默认是10条
      $page['item_count'] = $num;// 返回一个数组$page，$page['limit']=0，10
      $this->_format_page($page);//格式化分页
      $sql = 'select id,title,content from test order by id desc limit '.$page['limit']; 
      $que = $goods_mod -> getAll($sql);//查询记录
      $this -> assign('page_info',$page); //向模板页传递页数
      $this -> assign('que',$que); //向模板页传递查询结果