case 'favorite':
                    if ($operator_sql === 'NOT SOUNDS LIKE') {
                        $where[] = "NOT ((`album`.`name` SOUNDS LIKE ? OR LTRIM(CONCAT(COALESCE(`album`.`prefix`, ''), ' ', `album`.`name`)) SOUNDS LIKE ?) AND `favorite_album_" . $search_user_id . "`.`user` = " . $search_user_id . " AND `favorite_album_" . $search_user_id . "`.`object_type` = 'album')";
                    } else {
                        $where[] = "(`album`.`name` $operator_sql ? OR LTRIM(CONCAT(COALESCE(`album`.`prefix`, ''), ' ', `album`.`name`)) $operator_sql ?) AND `favorite_album_" . $search_user_id . "`.`user` = " . $search_user_id . " AND `favorite_album_" . $search_user_id . "`.`object_type` = 'album'";