luck-draw/app/model/SlidePosition.php

<?php
namespace app\model;

/**
 * 轮播图显示位置
 *
 * Class SlidePosition
 * @package app\model
 */
class SlidePosition extends Base
{
    const home_position = "home-banner";
    public static function allPosition()
    {
        return self::select();
    }
}