/** * Save a {@link question_usage_by_activity} to the database. This works either * if the usage was newly created by {@link make_questions_usage_by_activity()} * or loaded from the database using {@link load_questions_usage_by_activity()} * @param question_usage_by_activity the usage to save. */ public static function save_questions_usage_by_activity(question_usage_by_activity $quba) { $dm = new question_engine_data_mapper(); $observer = $quba->get_observer(); if ($observer instanceof question_engine_unit_of_work) { $observer->save($dm); } else { $dm->insert_questions_usage_by_activity($quba); } }