<?php
namespace Admin\Model;
use Think\Model\RelationModel;
class LinkModel extends RelationModel{
    //自动验证
    //array(验证字段,验证规则,错误提示,[验证条件,附加规则,验证时间])
    protected $_validate = array(
        array('name','require','请填写名称！',1),
    ); 
	//关联模型
	protected $_link = array(
		//对应栏目表
		"link_cat"=>array(
                    'mapping_type'  => self::BELONGS_TO,
                    'foreign_key'   => 'catid',
		) 
	);
}