public static function find_by_subject($subject_type, $subject_id)
{
// cached already? this is important as we often have several modules referencing the same item
$cache_key = "item:{$subject_type}:{$subject_id}";
$item = Cache::getValue($cache_key);
if (!empty($item)) {
return $item;
}
$r = Dal::query_one_assoc("SELECT * FROM {items} WHERE subject_type=? AND subject_id=?", array($subject_type, $subject_id));
if (!$r) {
return NULL;
}
$item = new Item();
$item->load_from_row($r);
Cache::setValue($cache_key, $item);
return $item;
}
