fdesk/app/crm/validate/FollowValidate.php

<?php

namespace app\crm\validate;

use think\Validate;

class FollowValidate extends Validate
{

    protected $rule = [
        'customer_id'          => 'require',
    ];

    protected $message = [
        'customer_id.require'              => '用户id不能为空',
    ];

    protected $scene = [
        'list' => ['customer_id'],
    ];
}