/**
* Preload tags for a set of objects. It might be usefull in case you want to
* display a long list of taggable objects with their associated tags: it
* avoids to load tags per object, and gets all tags in a few requests.
*
* @param array $objects
*/
public static function preloadTags(&$objects)
{
$searched = array();
foreach ($objects as $object) {
$class = get_class($object);
if (!isset($searched[$class])) {
$searched[$class] = array();
}
$searched[$class][$object->getPrimaryKey()] = $object;
Taggable::set_saved_tags($object, array());
}
$q = Doctrine_Core::getTable('Tagging')->createQuery('t')->leftJoin('t.Tag as tag')->orderBy('t.taggable_id')->setHydrationMode(Doctrine_Core::HYDRATE_ARRAY);
foreach ($searched as $model => $instances) {
$qClone = clone $q;
$taggings = $qClone->addWhere('t.taggable_model = ?', $model)->andWhereIn('t.taggable_id', array_keys($instances))->execute();
foreach ($taggings as $tagging) {
Taggable::add_saved_tag($instances[$tagging['taggable_id']], $tagging['Tag']['name']);
}
}
}
