Listing 11.3. Plik KontynentPeer.php z projektu 11.1
<?php
require 'panstwa_miasta/om/BaseKontynentPeer.php';
class KontynentPeer extends BaseKontynentPeer {
    static public function retrieveBySlug($slug)
    {
        $c = new Criteria();
        $c->add(self::SLUG, $slug);
        return parent::doSelectOne($c);
    }
    static public function doSelect($criteria = null, $con = null)
    {
        if (is_null($criteria)) {
            $criteria = new Criteria();
        } else {
            $criteria = clone $criteria;
        }
        $criteria->addAscendingOrderByColumn(self::NAZWA);
        return parent::doSelect($criteria, $con);
    }
} // KontynentPeer
