Session value saved to database in yii - php

Question

In the form when I echo the session value it is prompted no errors, but when I try to save it on the database in the model the value is not saved.
Here is my view:
(I just posted here what I think is needed.)
<?php
$userid = Yii::app()->session['iduser'];
echo $userid;
?>
Here is my controller:
The contentid, title and content are saved in the database only the userid is my problem. In my database I set the userid as int(11) not null
public function actionContent(){
$model=new ContentForm;
if(isset($_POST['ContentForm'])) {
$model->attributes=$_POST['ContentForm'];
if($model->save())
$this->redirect(array('content','contentid'=>$model->contentid));
$this->redirect(array('content','title'=>$model->title));
$this->redirect(array('content','content'=>$model->content));
$this->redirect(array('content','userid'=>$model->userid));
}
$this->render('content',array('model'=>$model));
}
And here is my model:
<?php
class ContentForm extends CActiveRecord{
public $content;
public $title;
public $userid;
public function tableName(){
return 'tbl_content';
}
public function attributeLabels(){
return array(
'contentid' => 'contentid',
'content' => 'content',
'title' => 'title',
'userid' => 'userid',
);
}
public function rules(){
return array(
array('content, title, userid', 'safe'),
);
}
}

Answer 1

Your user id Stored in Session it can accessed anywhere in the MVC
Try this on your controller
public function actionContent(){
$model=new ContentForm;
if(isset($_POST['ContentForm'])) {
$model->attributes=$_POST['ContentForm'];//The post values
$model->userid=Yii::app()->session['iduser'];
if($model->save())
$this->redirect(array('content','contentid'=>$model->contentid));
//$this->redirect(array('content','title'=>$model->title));
//$this->redirect(array('content','content'=>$model->content)); //Why this to many redirects here the first redirect only works here
//$this->redirect(array('content','userid'=>$model->userid));
}
$this->render('content',array('model'=>$model));
}