public function cancelGoods($id)
{
$goodsUser = GoodsUser::findOrFail($id);
$user = $goodsUser->User;
$goods = $goodsUser->Goods;
$user->points += $goods->points;
$user->save();
$goodsUser->delete();
Session::flash('flash_message', '取消兑换商品成功');
return \Redirect::back();
}
