public function actionEditTour($tour_id)
 {
     if (!($tour = Tours::findOne($tour_id))) {
         Yii::$app->session->setFlash('danger', 'Tour not found');
         return $this->redirect('manage-tours');
     }
     $model = new TourForm();
     $model->initForm($tour);
     $tourDateForm = new ToursDatesForm();
     $customFieldForm = new CustomFieldsForm();
     $dataProvider = new ActiveDataProvider(['query' => ToursDates::find()->where([ToursDates::FIELD_TOUR_ID => $tour_id])]);
     $customFieldsDataProvider = new ActiveDataProvider(['query' => CustomFields::find()->where([CustomFields::FIELD_TOUR_ID => $tour_id])]);
     if ($model->load(Yii::$app->request->post(), 'TourForm') && $model->save()) {
         Yii::$app->session->setFlash('success', 'Tour successful updated');
         return $this->redirect('manage-tours');
     }
     if ($tourDateForm->load(Yii::$app->request->post(), 'ToursDatesForm') && $tourDateForm->save()) {
         Yii::$app->session->setFlash('success', 'New date successful added');
         return $this->redirect(['edit-tour', Tours::FIELD_TOUR_ID => $tour_id]);
     }
     if ($customFieldForm->load(Yii::$app->request->post(), 'CustomFieldsForm') && $customFieldForm->save()) {
         Yii::$app->session->setFlash('success', 'New Custom field successful added');
         return $this->redirect(['edit-tour', Tours::FIELD_TOUR_ID => $tour_id]);
     }
     return $this->render('edit_tour', ['model' => $model, 'tourDateForm' => $tourDateForm, 'customFieldForm' => $customFieldForm, 'dataProvider' => $dataProvider, 'customFieldsDataProvider' => $customFieldsDataProvider]);
 }