infinite rolování článků nette/ajax

Použil jsem, díky, ale zlobí mě to (asi dělám něco špatně) , protože „$this->isAjax“ je pořád false…

Presenter

class TopicPresenter extends BasePresenter {

  /** @persistent */
  public $topic;

  /** @var topic object */
  private $topicObj;

  /** @var step size */
  private $step = 5;

  /**
   * Preloads topic object
   */
  public function actionDefault() {
    if ($this->topicObj == null) {
      $this->topicObj = (new Topic())->setDb($this->db)->loadByStrKey($this->topic);
    }
  }

  /**
   * Renders articles
   */
  public function renderDefault() {
    if (!isset($this->template->articles)) {
      $this->template->articles = $this->loadArticles();
      $this->template->topicObj = $this->topicObj;
      $this->template->offset = 0;
    }
  }

  /**
   * Updates infinite list of articles
   * @param int $offset
   */
  public function handleUpdate($offset) {
    if ($this->isAjax()) {
      $offset += $this->step;
      $this->template->articles = $this->loadArticles($offset);
      $this->template->offset = $offset;
    } else {
      $this->template->articles = array();
      $this->template->offset = $offset;
    }
    $this->template->topicObj = $this->topicObj;
    $this->redrawControl('articlesContainer');
  }

  /**
   * Loads articles
   * @param int $offset
   * @return array list of articles
   */
  private function loadArticles($offset = 0) {
    return $this->db->fetchAll($this->createQuery($offset));
  }

  /**
   * Creates query for articles
   * @param string $offset
   * @return string query string
   */
  private function createQuery($offset = 0) {
    $view = 'view_verified_article';
    $q  = 'SELECT a.* FROM ' . $view . ' AS a ';
    $q .= 'WHERE a.topic_id = ' . $this->topicObj->getId() . ' ';
    $q .= 'ORDER BY a.article_inserted DESC ';
    $q .= 'LIMIT ' . $offset . ', ' . $this->step;
    return $q;
  }
}

A latte:

{block content}
<h1>{$topicObj->getName()}</h1>
<p>{$topicObj->getDescr()}<p/>

<div n:snippet="articlesContainer" data-ajax-append="true">
  {foreach $articles as $article}
    <h2>{$article['article_title']}</h2>
    {$article['article_content']}
  {/foreach}
</div>
<a class="ajax" n:href="update! $offset">Starší články</a>

{/block}
{block scripts}
<script src="{$basePath}/js/jquery.js"></script>
<script src="{$basePath}/js/main.js"></script>
<script src="{$basePath}/js/nette.ajax.js"></script>
{/block}