public function addSubmitAction()
{
$db = Env::get('db');
$db->begin();
$entity = $this->entity;
$item = $entity::createNew();
$formData = new FormData($this->editFields);
$formData->retrieve();
$formData->validate(function ($errors) use($formData) {
$errorsJson = json_encode($errors);
$formDataJson = json_encode($formData->toStringArray());
HTTP::redirect($this->url('add', ['errors' => $errorsJson, 'form' => $formDataJson]));
});
$this->beforeSave($item, $formData);
$item->setData($formData->getValues());
$item->save();
$this->afterSave($item);
$db->commit();
HTTP::redirect($this->url());
}