project/app/admin/model/Area.php

<?php
namespace app\admin\model;

class Area extends Base
{
//设置字段信息
    protected $schema = [
        'id'       =>'int',//
        'name'       =>'varchar',//名称
        'area_code'       =>'varchar',//编码
        'city_code'       =>'varchar',//父级编码

    ];
}