Yii framework. Can't save model - php

Question

I have problem with Yii. I have following code in controller:
...
$user = User::model()->find("user_id = :id AND type='1'", array('id'=>$user->id));
$user->time=new CDbExpression('NOW()');
$user->status=1;
$user->save();
...
And Im getting this error:
Call to undefined method stdClass::save()
What's wrong?

Answer 1

oo i see you need to test if you have a user
just do :
if($user)
is your model extand a CactiveRecord ?
you should display the errors to know what's wrong
if(!$user->save()){
var_dump($user->getErrors());
}
this will be helpfull

Answer 2

Your error is to classic to knwo exactly what went wrong! here's a problem that could be the reason of your error:
When you find your user, if it doesn't find it the method will return false then the rest of the operations will fail. You should perform something like:
$user = User::model()->find("user_id = :id AND type='1'", array('id'=>$user->id));
if($user !== null) {
$user->time=new CDbExpression('NOW()');
$user->status=1;
$user->save();
}

Answer 3

if ($model->load(Yii::$app->request->post())) {
$model->startDate = $modifiedStartDate;
$model->timeFrom = $modifiedFromTime;
$model->timeTo = $modifiedToTime;
//echo '<pre>';
//print_r($model);exit;
$model->save();
//return $this->redirect(['view', 'id' => $model->id]);
return $this->redirect(['timelog/index']);
} else {
return $this->render('create',
[
'model' => $model,
]);
}
//why the error occurs while using the $method->save(); function.