/**
  * Creates the model
  *
  * @return \MUtil_Model_ModelAbstract
  */
 protected function createModel()
 {
     if (!$this->exportModel instanceof \MUtil_Model_ModelAbstract) {
         $yesNo = $this->util->getTranslated()->getYesNo();
         $model = new \MUtil_Model_SessionModel('export_for_' . $this->request->getControllerName());
         $model->set('orgs', 'label', $this->_('Organization export'), 'default', 1, 'description', $this->_('Export the organizations for which the track is active'), 'multiOptions', $yesNo, 'required', true, 'elementClass', 'Checkbox');
         $model->set('fields', 'label', $this->_('Field export'));
         $fields = $this->trackEngine->getFieldNames();
         if ($fields) {
             $model->set('fields', 'default', array_keys($fields), 'description', $this->_('Check the fields to export'), 'elementClass', 'MultiCheckbox', 'multiOptions', $fields);
         } else {
             $model->set('fields', 'elementClass', 'Exhibitor', 'value', $this->_('No fields to export'));
         }
         $rounds = $this->trackEngine->getRoundDescriptions();
         $model->set('rounds', 'label', $this->_('Round export'));
         if ($rounds) {
             $defaultRounds = array();
             foreach ($rounds as $roundId => &$roundDescription) {
                 $round = $this->trackEngine->getRound($roundId);
                 if ($round && $round->isActive()) {
                     $defaultRounds[] = $roundId;
                 } else {
                     $roundDescription = sprintf($this->_('%s (inactive)'), $roundDescription);
                 }
                 $survey = $round->getSurvey();
                 if ($survey) {
                     $model->set('survey__' . $survey->getSurveyId(), 'label', $survey->getName(), 'default', $survey->getExportCode(), 'description', $this->_('A unique code indentifying this survey during track import'), 'maxlength', 64, 'required', true, 'size', 20, 'surveyId', $survey->getSurveyId());
                 }
             }
             $model->set('rounds', 'default', $defaultRounds, 'description', $this->_('Check the rounds to export'), 'elementClass', 'MultiCheckbox', 'multiOptions', $rounds);
         } else {
             $model->set('rounds', 'elementClass', 'Exhibitor', 'value', $this->_('No rounds to export'));
         }
         $this->exportModel = $model;
     }
     return $this->exportModel;
 }