Запрос в базу данных - ошибка - JoomShopping

$db = JFactory::getDbo();
$query = $db->getQuery(true);
$query->select(`name_ru-RU`);
$query->from($db->quoteName('#__jshopping_products_extra_field_values'));
$query->where($db->quoteName('field_id')." = ".$sort);
$db->setQuery($query);
$results = $db->loadObjectList();

$query->where($db->quoteName('field_id'). ' = ' . (int) $sort);

echo $query;

// $results = $db->loadObjectList();
echo $query;

$query->select(`name_ru-RU`);

$query->select('`name_ru-RU`');

$query->select($db->quoteName('name_ru-RU'));

$query->select($db->quoteName('name_ru-RU'));

$data =new stdClass();
$data->product_id = $nextid;
$data->quoteName('name_ru-RU') = $kname;

$db = JFactory::getDBO();
$db->insertObject( '#__jshopping_products', $data, product_id );

$data->`name_ru-RU` = $kname;