/**
* 单个用户的购物车分页函数
* @param $page 页数
* @param $perPage 每页条数
* */
public function getPagesByUser($page, $perPage = 10)
{
//翻页的开始-结束
$from = $page * $perPage - $perPage;
$to = $perPage;
//按更新时间倒序输出
$totalData = DB::table("favorites")->where('uid', $this->user->id)->orderBy("updated_at", "desc")->get();
$data['favorites'] = DB::table("favorites")->where('uid', $this->user->id)->orderBy("updated_at", "desc")->skip($from)->take($to)->get();
//相当于limit $from,$to
$data['products'] = Favorite::getProductList($this);
//获取购物车相关联的商品表数据
$data['page']['total'] = count($totalData);
//计算数据总条数
$availible = ceil(count($totalData) / $perPage);
//计算数据可分的总页数
$last = $page;
//当前页页码大于1的时候，才能-1
if ($page > 1) {
$last = $page - 1;
}
//计算上一页的页码
$data['page']['last'] = $last;
$next = $page + 1;
//计算下一页的页码
if ($next <= $availible) {
$data['page']['next'] = $page + 1;
}
//如果下一页的页码小于或等于可分的总页数，下一页的页码+1
//把数据存入翻页类中
$data['paginator'] = new Paginator($data['favorites'], count($totalData), $page);
// dd($data);
return $data;
}