book_admin/application/admin/validate/ReferralMany.php

<?php

namespace app\admin\validate;

use think\Validate;

class ReferralMany extends Validate
{
    /**
     * 验证规则
     */
    protected $rule = [
        'referral_ids' => 'require|min:1'
    ];
    /**
     * 提示消息
     */
    protected $message = [
        'referral_ids.require' => '请先添加短链接',
        'referral_ids.min' => '请先添加短链接'
    ];
    /**
     * 验证场景
     */
    protected $scene = [
        'add'  => ['referral_ids'],
        'edit' => ['referral_ids'],
    ];
}