<?php
namespace app\model;

use think\Model;

class Message extends Model
{
    protected $table = 'messages';
    protected $pk = 'id';
    protected $autoWriteTimestamp = true;
    protected $createTime = 'created_at';
    protected $updateTime = false;

    // 允许写入的字段
    protected $schema = [
        'id'          => 'int',
        'card_no'     => 'string',
        'sender_type' => 'string',
        'staff_id'    => 'int',
        'content'     => 'text',
        'is_read'     => 'int',
        'created_at'  => 'datetime',
    ];
}