root/plugins/sfSimpleCMSPlugin/lib/model/sfSimpleCMSPage.php

<?php

/**
 * Subclass for representing a row from the 'sf_simple_cms_page' table.
 *
 * 
 *
 * @package plugins.sfSimpleCMSPlugin.lib.model
 */ 
class sfSimpleCMSPage extends BasesfSimpleCMSPage
{
  protected $localizations = null;
  
  public function __toString()
  {
    return ($this->getTitle() ? $this->getTitle() : '['.$this->getSlug().']');
  }
  
  public function getSlugWithLevel()
  {
    return str_repeat(' - ', $this->getLevel()).$this->getSlug();
  }
  
  public function hasLocalization($culture)
  {
    $localizations = $this->getLocalizations();
    return in_array($culture, $localizations);
  }
  
  public function getLocalizations()
  {
    if($this->localizations === null)
    {
      $c = new Criteria();
      $c->clearSelectColumns();
      $c->addSelectColumn(sfSimpleCMSPageI18nPeer::CULTURE);
      $c->add(sfSimpleCMSPageI18nPeer::ID, $this->getId());
      $rs = sfSimpleCMSPageI18nPeer::doSelectRS($c);
      
      $localizations = array();
      foreach ($rs as $set)
      {
        $localizations[] = $set[0];
      }
      
      $this->localizations = $localizations;
    }
    
    return $this->localizations;
  }
}

$columns_map = array('left'   => sfSimpleCMSPagePeer::TREE_LEFT,
                     'right'  => sfSimpleCMSPagePeer::TREE_RIGHT,
                     'parent' => sfSimpleCMSPagePeer::TREE_PARENT,
                     'scope'  => sfSimpleCMSPagePeer::TOPIC_ID);

sfPropelBehavior::add('sfSimpleCMSPage', array('actasnestedset' => array('columns' => $columns_map)));