Horde_Rdo_Query::sortBy PHP Method

    public function sortBy($sort)
    {
        $this->_sortby[] = $sort;
        return $this;
    }

 /**
  * List discussions, filtered by various criteria
  * @params array $filters  The array of filters allowed keys
  *                      'state' => array('Y', 'D', 'R')
  *
  *                           Allowed states
  *                                   Y  => OK,
  *                                   D  => Declined
  *                                   R  => awaiting approval
  *                                   defaults to 'R' - passing an empty array means 'all'
  *                       'category' => The category id to filter for
  *                       'user'     => A user's numeric id to filter for
  */
 public function listDiscussions(array $filters = array())
 {
     $filters = array_merge(array('state' => array('Y'), 'limit' => array()), $filters);
     $dm = $this->_mappers->create('Dolcore_Rdo_DiscussionMapper');
     $query = new Horde_Rdo_Query($dm);
     if ($filters['category']) {
         $query->addTest('kategorie_id', '=', $filters['category']);
     }
     if ($filters['user']) {
         $query->addTest('benutzer_id', '=', $filters['user']);
     }
     if (count($filters['state'])) {
         $query->addTest('checked', 'IN', $filters['state']);
     }
     $query->sortBy('erstelldatum DESC');
     return $dm->find($query);
 }