hcsl/app/Model/Setting.php

<?php

namespace App\Model;

use Illuminate\Database\Eloquent\Model;

class Setting extends Model
{
    protected $table = "setting"; //指定表
    const CREATED_AT = null;
    const UPDATED_AT = null;
    protected $dateFormat = 'U';
    protected $primaryKey = 'setting_name';
    protected $keyType = 'string'; // 设置主键类型为字符串
}