jili2/application/common/validate/Menu.php

<?php
namespace app\common\validate;

use think\Validate;

class Menu extends Validate{

    protected $rule = [
        'title|名称'  =>  'require|length:1,10',
    ];

    protected $message = [
        'title.length' => '名称必须10字以内',
    ];

    protected $scene = [

    ];

}