Error: getting unknown property: yii\web\Application::generateid - yii

Question

I have the below code in studentsController.php to add data to 2 tables from a form but im getting error. It is to add to students table, then add some data to the users table too. I feel i'm supposed to add something at the top via "use' keyword but I don't know.please help.
public function actionCreate() {
$model = new model();
$user = new Users();
if ($model->load(Yii::$app->request->post())) {
$model->id = Yii::$app->generateid->getGUID(); //this line caused the error
$model->save();
$studentId = $model->id;
if($user->load(Yii::$app->request->post()))
{
$user->id = $model->id;
$user->firstname = $model->firstname;
$user->lastname = $model->lastname;
$user->username = $model->phone;
$user->password = 'pass123'; //default password
$user->role = 'student';
$user->save(false);
}
return $this->redirect(['view', 'id' => $model->id]);
} else {
return $this->render('create', [
'model' => $model,
'user' => $user,
]);
}
}

Answer 1

You seem to miss generateid in your web.php
It should be something like this
GenerateIDs.php inside #app/components folder
<?php
namespace app\components;
class GenerateIDs extends \yii\base\Component
{
public function getGUID()
{
//do your stuff here
}
//....
}
then in your #app/config/web.php you have something like
<?php
return [
'components' => [
'generateid' => [
'class'=>'app\components\GenerateIDs',
// other configurations for the component
],
],
];
then you can use it in your app as you wish
public function actionCreate() {
$model = new model();
$user = new Users();
if ($model->load(Yii::$app->request->post())) {
$model->id = Yii::$app->generateid->getGUID(); //this line caused the error
$model->save();
$studentId = $model->id;
if($user->load(Yii::$app->request->post()))
{
$user->id = $model->id;
$user->firstname = $model->firstname;
$user->lastname = $model->lastname;
$user->username = $model->phone;
$user->password = 'pass123'; //default password
$user->role = 'student';
$user->save(false);
}
return $this->redirect(['view', 'id' => $model->id]);
} else {
return $this->render('create', [
'model' => $model,
'user' => $user,
]);
}
Please take a look at Yii2 guide on Components