book_admin/application/admin/validate/Book.php

<?php

namespace app\admin\validate;

use think\Validate;

class Book extends Validate
{
    /**
     * 验证规则
     */
    protected $rule = [
       'idx'    =>  'require|number|between:0,100',
       'price'  =>  'require|number|min:0',
    ];
    /**
     * 提示消息
     */
    protected $message = [
        'idx.between'   =>  '排单指数只能在0-100之间',
        'price.min'   =>  '不能小于0',
    ];
    /**
     * 验证场景
     */
    protected $scene = [
        'add'  => [],
        'edit' => [],
    ];
    
}