drb/app/Model/ProductInfo.php

<?php

namespace App\Model;

use Illuminate\Database\Eloquent\Model;

class ProductInfo extends Model
{
    protected $table = "product_info"; //指定表
    const CREATED_AT = 'crt_time';
    const UPDATED_AT = 'upd_time';
    protected $dateFormat = 'U';
    const type_one = 1; // 图片
    const type_two = 2; // 文件
    public static $type = [
        self::type_one,
        self::type_two,
    ];
}