/**
  * コンテンツメタ情報を更新する
  *
  * @param Model $model
  * @return boolean
  */
 public function updateSearchIndexMeta(Model $model)
 {
     $db = ConnectionManager::getDataSource('default');
     $contentTypes = array();
     $searchIndexes = $this->SearchIndex->find('all', array('fields' => array('SearchIndex.type'), 'group' => array('SearchIndex.type'), 'conditions' => array('SearchIndex.status' => true)));
     foreach ($searchIndexes as $searchIndex) {
         if ($searchIndex['SearchIndex']['type']) {
             $contentTypes[$searchIndex['SearchIndex']['type']] = $searchIndex['SearchIndex']['type'];
         }
     }
     $siteConfigs['SiteConfig']['content_types'] = BcUtil::serialize($contentTypes);
     $SiteConfig = ClassRegistry::init('SiteConfig');
     return $SiteConfig->saveKeyValue($siteConfigs);
 }