public function get_subcomments() { if (!isset($this->data['subcomments'])) { $this->data['subcomments'] = comment_model::get_comments(array('filters' => array('file_id' => $this->get_file_id(), 'comment_parent_id' => $this->get_id()), 'orders' => array('comment_add_datetime' => 'asc'))); } return $this->data['subcomments']; }