WebUser.php

<?php
/**
 * Web user component with support for loading the associated model.
 * 
 * You can request attributes on the model object the following way:
 * Yii::app()->user->model->username;
 */
class WebUser extends CWebUser
{
    /**
     * @var string the name of the associated model class.
     */
    public $modelClass = 'User';
    
    /**
     * Returns the associated model for the logged in user.
     * @return CActiveRecord
     */
    public function getModel()
    {
        return !$this->isGuest ? CActiveRecord::model($this->modelClass)->findByPk($this->id) : null;
    }
}