A row associates with session is deleted when user logout in YII - php

Question

I have a site that uses YII. One thing that it does is storing session information into a MySql database table YiiSession. Also in a separate table (users_sessions), a new row is inserted with the following information:
session id
user id
online status of a user
I create another table for session because YiiSession is part of YII. Also users_session keeps track online status of a user, whereas YiiSession doesn't.
I only make an insertion into users_session during user login.
But I don't understand that when user logs out, the session that associates with the user got deleted.
Note that the session_id in the users_session is a foreign key to the one in YiiSession. But the one in YiiSession still exists even though it has an expiration date.
What mechanism that possibly deletes the row? Please help.

Answer 1

You should extend CDbHttpSession and overwrite the method destroySession($id). There you append the code and delete your entry also.
Configure Yii to use your session class instead of it's own in config/main.php:
'session' => array(
'autoStart' => true,
'class' => 'application.components.<your session class name>',
'connectionID' => 'db',
'sessionTableName' => 'session',
'autoCreateSessionTable' => false,
'timeout' => 3600, // 60 min
),
However I would not do this with a separate table, just add some fields to the YiiSession table. That's what I did and it works pretty well.
EDIT:
You should create a file named MyDbHttpSession.php in protected/components.
In this file extend CDbHttpSession like so:
class MyDbHttpSession extends CDbHttpSession
{
protected function createSessionTable($db, $tableName)
{
// basically this is a copy of CDbHttpSession
$db->createCommand()->createTable($tableName, array(
'id' => 'CHAR(32) PRIMARY KEY',
'expire' => 'integer',
'data' => $blob,
// your additional fields
'idUser' => 'INT(10) NULL',
'online' => 'TINYINT(1)',
// more of your fields here if you have
));
}
// this sets the user ID by session ID
public function setIdUser($idUser)
{
$db = $this->getDbConnection();
$db->setActive(true);
$db->createCommand()->update($this->sessionTableName, array('idUser' => (int) $idUser),
'id=:id', array(':id' => $this->sessionId)
);
}
// and this sets the online status, pass true or false to $online
public function setOnline($online)
{
$db = $this->getDbConnection();
$db->setActive(true);
$db->createCommand()->update($this->sessionTableName, array('online' => (int) $online),
'id=:id', array(':id' => $this->sessionId)
);
}
}
Set Yii to use your session class instead of it's own like I wrote above.
You should already have a class WebUser. If not, create one in protected/components and extend CWebUser.
In this class add a method afterLogin:
public function afterLogin($fromCookie)
{
// store user ID and online status in session table
Yii::app()->session->setIdUser($this->id);
Yii::app()->session->setOnline(true);
return parent::afterLogin($fromCookie);
}
You can from wherever you are in Yii use Yii::app()->session->setOnline(true); or Yii::app()->session->setOnline(false);