crm/app/sys/validate/Exam.php

<?php

namespace app\sys\validate;

use think\Validate;

class Exam extends Validate
{
    // 验证规则
    protected $rule =   [
        'type'  => 'require',
        'cate' => 'require',
        'ask' => 'require',
    ];

    // 错误消息
    protected $message = [
        'type.require'  => '参数type不能为空',
        'cate.require'  => '参数cate不能为空',
        'ask.require'  => '参数ask不能为空',
    ];

    /**
     * 验证场景
     */
    protected $scene = [
        'questionsave' => ['type','ask','cate']
    ];
}