drb/app/Model/ConstructionInfo.php

<?php

namespace App\Model;

use Illuminate\Database\Eloquent\Model;

class ConstructionInfo extends Model
{
    protected $table = "construction_info"; //指定表
    const CREATED_AT = 'crt_time';
    const UPDATED_AT = 'upd_time';
    protected $dateFormat = 'U';
    const type_one = 1; // 联系方式
    const type_two = 2; // 协同人
    const type_three = 3; // 负责人
    public static $type = [
        self::type_one,
        self::type_two
    ];
}