Сортировка материалов по новому полю БД - Joomla 1.5: Установка и обновление

Как надо изменить функцию:

   function _buildQuery($state = 1)
   {
      global $mainframe;

      // Get the page/component configuration
      $params = &$mainframe->getParams();

      // If voting is turned on, get voting data as well for the content items
      $voting   = ContentHelperQuery::buildVotingQuery($params);

      // Get the WHERE and ORDER BY clauses for the query
      $where      = $this->_buildContentWhere($state);
      $orderby   = $this->_buildContentOrderBy($state);
      $query = 'SELECT a.id, a.title, a.alias, a.title_alias, a.introtext, a.fulltext, a.sectionid, a.state, a.catid, a.created, a.created_by, a.created_by_alias, a.modified, a.modified_by, a.guide, a.price, a.start, a.start_text,' .
            ' a.checked_out, a.checked_out_time, a.publish_up, a.publish_down, a.attribs, a.hits, a.images, a.urls, a.ordering, a.metakey, a.metadesc, a.access,' .
            ' CASE WHEN CHAR_LENGTH(a.alias) THEN CONCAT_WS(\':\', a.id, a.alias) ELSE a.id END as slug,'.
            ' CASE WHEN CHAR_LENGTH(cc.alias) THEN CONCAT_WS(":", cc.id, cc.alias) ELSE cc.id END as catslug,'.
            ' CHAR_LENGTH( a.`fulltext` ) AS readmore, u.name AS author, u.usertype, cc.title AS category, g.name AS groups, u.email as author_email'.$voting['select'] .
            ' FROM #__content AS a' .
            ' INNER JOIN #__categories AS cc ON cc.id = a.catid' .
            ' LEFT JOIN #__sections AS s ON s.id = a.sectionid' .
            ' LEFT JOIN #__users AS u ON u.id = a.created_by' .
            ' LEFT JOIN #__groups AS g ON a.access = g.id'.
            $voting['join'].
            $where.
            $orderby;

      return $query;
   }

чтобы она выдавала материалы отсортированными по созданному полю start?

Отредактируйте функцию _buildContentOrderBy, либо замените $orderby в запросе на нужное условие сортировки

Видимо неправильно делаю запрос, результат ничего не выводит:

      // Get the WHERE and ORDER BY clauses for the query
      $where      = $this->_buildContentWhere($state);
      $orderby   = $this->_buildContentOrderBy($state);
      $query = 'SELECT a.id, a.title, a.alias, a.title_alias, a.introtext, a.fulltext, a.sectionid, a.state, a.catid, a.created, a.created_by, a.created_by_alias, a.modified, a.modified_by, a.guide, a.price, a.start, a.start_text,' .
            ' a.checked_out, a.checked_out_time, a.publish_up, a.publish_down, a.attribs, a.hits, a.images, a.urls, a.ordering, a.metakey, a.metadesc, a.access,' .
            ' CASE WHEN CHAR_LENGTH(a.alias) THEN CONCAT_WS(\':\', a.id, a.alias) ELSE a.id END as slug,'.
            ' CASE WHEN CHAR_LENGTH(cc.alias) THEN CONCAT_WS(":", cc.id, cc.alias) ELSE cc.id END as catslug,'.
            ' CHAR_LENGTH( a.`fulltext` ) AS readmore, u.name AS author, u.usertype, cc.title AS category, g.name AS groups, u.email as author_email'.$voting['select'] .
            ' FROM #__content AS a' .
            ' INNER JOIN #__categories AS cc ON cc.id = a.catid' .
            ' LEFT JOIN #__sections AS s ON s.id = a.sectionid' .
            ' LEFT JOIN #__users AS u ON u.id = a.created_by' .
            ' LEFT JOIN #__groups AS g ON a.access = g.id'.
            $voting['join'].
            $where.
            ' ORDER BY a.start ASC'.

Как правильно оформить запрос?

Замените:

на

Спасибо, всё заработало. А вообще, было бы феерчески здорово иметь на форуме инструкцию по введению в движок сортировки по созданному юзером полю. Чтоб это через админку можно было делать...