t_nine/app/Model/ProductSnInfo.php

<?php

namespace App\Model;

class ProductSnInfo extends UseScopeBaseModel
{
    protected $table = "product_sn_info"; //指定表
    const CREATED_AT = 'crt_time';
    const UPDATED_AT = 'upd_time';
    protected $dateFormat = 'U';
    const range_function = '';
    const type_one = 1;
    const type_two = 2;
    public static $type_name = [
        self::type_one => '施工单',
        self::type_two => '合同',
    ];
}