/**
  * Update person score in training
  */
 public static function updateScore($ptt_id, $label, $value)
 {
     if (!is_numeric($ptt_id)) {
         return false;
     }
     $scoreTable = new Training(array('name' => 'score'));
     $select = $scoreTable->select()->from('score')->setIntegrityCheck(false);
     $select->where("person_to_training_id = {$ptt_id} AND score_label = ?", $label);
     $row = $scoreTable->fetchAll($select)->toArray();
     // update
     if ($row) {
         $scoreTable->update(array('score_value' => $value), $scoreTable->getAdapter()->quoteInto("person_to_training_id = {$ptt_id} AND score_label = ?", $label));
     } else {
         $scoreTable->insert(array('person_to_training_id' => $ptt_id, 'score_label' => $label, 'score_value' => $value));
     }
 }