TP的多表查询+分页范例

ThinkPHP的多表查询+分页范例
 对于一个PHP程序员来说，多表查询是经常遇到的事，下面介绍一下ThinkPHP的多表查询+分页范例

 field('art_id') -> where( "art_public='1'" ) -> select() );//记录总数
$Page = new ZYPage($record_sum, $page_size, 5);
 $list = $db -> field( "$table.art_id,$table.art_title,$table.art_content,$table.art_description,$table2.cate_id,$table2.cate_name" ) ->
          join( "$table2 on $table.cate_id=$table2.cate_id" ) ->
          where( "$table.art_public='1'" ) ->
          order( "$table.art_create_time desc,$table.art_id desc" ) ->
          limit($Page->firstRow.",".$Page->listRows) ->
          select();

$this -> assign( "article", $list); //输出文章列表

$show = $Page -> show();
 $this -> assign( "page", $show); //输出分页

?>

例2：（自己写的）

       //显示某一用户，某一订单详情（order详情、fllow_order详情	
       public function viewOneOrder(){
       		import('ORG.Util.Page');
       		$userid = $_POST['userid'];
       		$orderid = $_POST['orderid'];

       		if(empty($userid)){
                $result=array('err_no' =>1001,'err_msg'=>"userid is empty");    //用户id为空
                echo json_encode($result); exit;
            }
            if(empty($orderid)){
                $result=array('err_no' =>1001,'err_msg'=>"orderid is empty");    //跟单id为空
                echo json_encode($result); exit;
            }

       		$db = M( "order" );
			$fix = C( "DB_PREFIX" );
			$table = $fix."order";
			$table2 = $fix."follow_order";

			$page_size = 1; //每页显示记录数

			//$count = count( $db -> field('art_id') -> where( "art_public='1'" ) -> select() );//记录总数
			//查询满足条件的总页数
			$data = $db -> field( "$table.id,$table.name,$table.remark as o_remark,$table2.time,$table2.remark as f_remark" ) ->
	          join( "$table2 on $table.id=$table2.order_id" ) ->
	          where( "$table.userid = '$userid' and $table.id = '$orderid' " ) ->
	          order( "$table.id" ) ->
	          select();


	         $count = count($data);
	         $Page = new Page($count, 1);

	         $data = $db -> field( "$table.id,$table.name,$table.remark as o_remark,$table2.time,$table2.remark as f_remark" ) ->
	          join( "$table2 on $table.id=$table2.order_id" ) ->
	          where( "$table.userid = '$userid' and $table.id = '$orderid' " ) ->
	          order( "$table.id" ) ->
	          limit($Page->firstRow.",".$Page->listRows) ->
	          select();

            if($data){
                $result=array('err_no' =>1,'err_msg'=>"success",'data'=>$data,'TotalPages'=>$Page->getTotalPages(),'count'=>$count);   //调用行业资讯列表成功,并返回总页数 (存在数据)
                echo json_encode($result); 
                exit; 
            }else{
                $result=array('err_no' =>0,'err_msg'=>"order is empty");   //调用失败 (不存在数据)
                echo json_encode($result); exit; 
            }
            //var_dump($order->getlastsql());

       }