public static function getRatingsFromAddon($aid)
 {
     $database = new DatabaseManager();
     RatingManager::verifyTable($database);
     $resource = $database->query("SELECT * FROM `addon_ratings` WHERE `aid` = '" . $database->sanitize($aid) . "'");
     if (!$resource) {
         throw new Exception("Database error: " . $database->error());
     }
     $addonRatings = [];
     while ($row = $resource->fetch_object()) {
         $addonRatings[] = RatingManager::getFromID($row->id, $row)->getID();
     }
     $resource->close();
     return $addonRatings;
 }