Pass parameter to view action from extended class - yii2

Question

I extended "dektrium/yii2-user" controller's class as below, now I want to have $authItems in render view file of parent class, how should I pass this variable?
namespace app\controllers;
use app\models\AuthItem;
use dektrium\user\controllers\RegistrationController as BaseRegistrationController;
class RegistrationController extends BaseRegistrationController
{
public function actionRegister()
{
$authItems = AuthItem::find()->all();
return parent::actionRegister();
}
}
its is main class method
public function actionRegister()
{
if (!$this->module->enableRegistration) {
throw new NotFoundHttpException();
}
/** #var RegistrationForm $model */
$model = \Yii::createObject(RegistrationForm::className());
$event = $this->getFormEvent($model);
$this->trigger(self::EVENT_BEFORE_REGISTER, $event);
$this->performAjaxValidation($model);
if ($model->load(\Yii::$app->request->post()) && $model->register()) {
$this->trigger(self::EVENT_AFTER_REGISTER, $event);
return $this->render('/message', [
'title' => \Yii::t('user', 'Your account has been created'),
'module' => $this->module,
]);
}
return $this->render('register', [
'model' => $model,
'module' => $this->module,
]);
}

Answer 1

A solution could be
don't invoke the parent::actionRegister();
and add the code directly in your actionRegister
and last add the autItems to the render function array parameters
class RegistrationController extends BaseRegistrationController
{
public function actionRegister()
{
$authItems = AuthItem::find()->all();
// return parent::actionRegister();
if (!$this->module->enableRegistration) {
throw new NotFoundHttpException();
}
/** #var RegistrationForm $model */
$model = \Yii::createObject(RegistrationForm::className());
$event = $this->getFormEvent($model);
$this->trigger(self::EVENT_BEFORE_REGISTER, $event);
$this->performAjaxValidation($model);
if ($model->load(\Yii::$app->request->post()) && $model->register()) {
$this->trigger(self::EVENT_AFTER_REGISTER, $event);
return $this->render('/message', [
'title' => \Yii::t('user', 'Your account has been created'),
'module' => $this->module,
]);
}
return $this->render('register', [
'model' => $model,
'module' => $this->module,
'authItems' => $authItems;
]);
}
}

Answer 2

I would do something like this:
Add a member variable to your extended class, such as:
namespace app\controllers;
use app\models\AuthItem;
use dektrium\user\controllers\RegistrationController as BaseRegistrationController;
class RegistrationController extends BaseRegistrationController
{
public $authitems;
public function actionRegister()
{
$this->authitems = AuthItem::find()->all();
return parent::actionRegister();
}
}
Then in your parent class, do a test to see if that variable is set, such as:
public function actionRegister()
{
//.........
return $this->render('register', [
'model' => $model,
'module' => $this->module,
'authitems' => (isset($this->authitems)) ? $this->authitems : null;
]);
}