public function countProductByTagId($tagId)
{
$tagCache = '__count_product_by_tag_id__';
$productModel = new productModel();
$tagService = new tagService();
$subTag = $tagService->getAllChildTag($tagId);
$count = $productModel->countProductByTagId($subTag);
Cache::tags($tagCache)->put($tagId, $count, '3600');
return $count;
}
