ThinkPHP5查询数据及处理结果的方法小结

<?php
/**
 * Created by PhpStorm.
 * User: chenzhitao
 * Date: 2017/5/7
 * Time: 下午1:49
 */
namespace app\api\controller\v1;
use app\api\validate\IDMustBePositiveInt;
use app\lib\exception\BannerMissException;
use app\api\model\Banner as BannerModel;
class Banner
{
  public function getBanner($id){
     //调用验证器
    (new IDMustBePositiveInt())->goCheck();
//    $banner = BannerModel::getBannerByID($id);
    $banner = BannerModel::get($id);
    if(!$banner){
      throw new BannerMissException();
    }
    return $banner;
  }
}