IndexController.php

/**
 * Retorna os comentários de um post
 * @return Zend\Http\Response 
 */
public function commentsAction()
{
    $id = (int) $this->params()->fromRoute('id', 0);
    $where = array('post_id' => $id);
    $comments = $this->getTable('Application\Model\Comment')
                        ->fetchAll(null, $where)
                        ->toArray();
    $result = new ViewModel(array(
        'comments' => $comments
        )
    );
    $result->setTerminal(true);
    return $result;
}