public function index() {
	$sql = "";
	$list = "";
	$pagenumber = 20;
	//默认分页条数
	//查询数据
	$list = Db::name('wcmall_type','id,name,sort')->where($sql)->order('sort asc')->paginate($pagenumber)->each(function($item, $key) {
		$wctypeid = $item["id"];
		//获取数据集中的id
		$num = Db::name('wcmall_type_attribute')->where("wctypeid='$wctypeid'")->count('id');
		//根据ID查询相关其他信息
		$item['num'] = $num;
		//给数据集追加字段num并赋值
		return $item;
	}
	);
	$page = $list->render();
	return view('type/index',['list'=>$list,'page'=>$page,'title'=>'商品类型']);
}