/**
* Updates an existing Poll model.
* If update is successful, the browser will be redirected to the 'view' page.
* @param integer $id
* @return mixed
*/
public function actionUpdate($id)
{
$model = $this->findModel($id);
if ($model->isLocked()) {
throw new HttpException(403, Yii::t('app', 'This poll cannot be edited because it has already been accessed by a voter'));
}
$modelOptions = $model->options;
if ($model->load(Yii::$app->request->post())) {
$oldIDs = ArrayHelper::map($modelOptions, 'id', 'id');
$modelOptions = Model::createMultiple(Option::classname(), $modelOptions);
Model::loadMultiple($modelOptions, Yii::$app->request->post());
$deletedIDs = array_diff($oldIDs, array_filter(ArrayHelper::map($modelOptions, 'id', 'id')));
// ajax validation
if (Yii::$app->request->isAjax) {
Yii::$app->response->format = Response::FORMAT_JSON;
return ArrayHelper::merge(ActiveForm::validateMultiple($modelOptions), ActiveForm::validate($model));
}
// validate all models
$valid = $model->validate();
$valid = Model::validateMultiple($modelOptions) && $valid;
if ($valid) {
$transaction = \Yii::$app->db->beginTransaction();
try {
if ($flag = $model->save(false)) {
if (!empty($deletedIDs)) {
Option::deleteAll(['id' => $deletedIDs]);
}
foreach ($modelOptions as $modelOption) {
$modelOption->poll_id = $model->id;
if (!($flag = $modelOption->save(false))) {
$transaction->rollBack();
break;
}
}
}
if ($flag) {
$transaction->commit();
return $this->redirect(['view', 'id' => $model->id]);
}
} catch (Exception $e) {
$transaction->rollBack();
}
}
}
return $this->render('update', ['model' => $model, 'modelOptions' => empty($modelOptions) ? [new Option(), new Option()] : $modelOptions]);
}
