public function executeExport($request)
 {
     if ($request->isMethod('POST')) {
         $exportManager = sfExportManager::create('Resource');
         $sheets = array('stuff' => array('have', 'need'), 'info' => array('have', 'need'), 'time' => array('need'));
         foreach ($sheets as $prefix => $types) {
             $class = sfInflector::camelize($prefix . 'Resource');
             $fields = Doctrine::getTable($class)->getColumnNames();
             $fields = array_combine($fields, $fields);
             foreach ($fields as $key => $value) {
                 $fields[$key] = sfInflector::humanize($value);
             }
             foreach ($types as $type) {
                 $results = Doctrine::getTable($class)->createQuery()->where('transaction_type = ?', $type)->execute();
                 $exportManager->exportCollectionSheet($results, $fields, sprintf('%s %s', $type, $prefix));
             }
         }
         $title = $request->getParameter('title', 'Donate_Nashville_Export');
         $title = $request->getParameter('include_timestamp') ? $title . '-' . date('Y-m-d H:i') : $title;
         $exportManager->output($title);
         return sfView::NONE;
     }
 }