backend-api/app/validate/api/user/UserExtractValidate.php

<?php

namespace app\validate\api\user;

use think\Validate;

class UserExtractValidate extends Validate
{

    protected $rule = [
        "fail_msg"      => "require",
    ];


    protected $message = [
        "fail_msg.require"      => "拒绝理由不能为空",
    ];

    protected $scene = [

    ];

}