// +---------------------------------------------------------------------- namespace app\wap\model\material; use traits\ModelTrait; use basic\ModelBasic; use service\UtilService as Util; /** * Class DataDownloadCategpry 二级分类 * @package app\wap\model\material */ class DataDownloadCategpry extends ModelBasic { use ModelTrait; public function children() { return $this->hasMany('DataDownloadCategpry', 'pid', 'id')->where(['is_del' => 0, 'is_show' => 1])->order('sort DESC,id DESC'); } }