Yii Framework: How to save radioButton, checkBox values.

_form.php

<div class="form">
    <?php echo CHtml::form(); ?>
    <?php echo CHtml::errorSummary($model); ?>

    <div class="row">
        <?php echo CHtml::activeLabel($model, 'sex'); ?>
        <?php echo CHtml::activeRadioButtonList($model, 'sex', $model->sexOptions, array(
            'separator' => '',
        )); ?>
    </div><!-- /.row -->

    <div class="row">
        <?php echo CHtml::activeLabel($model, 'birth'); ?> 
        <?php $this->widget('zii.widgets.jui.CJuiDatePicker', array(
            'model' => $model,
            'attribute' => 'birth',
        )); ?> 
    </div><!-- /.row -->

    <div class="row">
        <?php echo CHtml::activeLabel($model, 'hobby'); ?> 
        <?php echo CHtml::activeCheckBoxList($model, 'hobby', $model->hobbyOptions); ?> 
    </div><!-- /.row -->

    <div class="row">
        <?php echo CHtml::activeLabel($model, 'body'); ?> 
        <?php echo CHtml::activeTextArea($model, 'body', array('rows' => 10, 'cols' => 70)); ?> 
    </div><!-- /.row -->

    <div class="row buttons">
        <?php echo CHtml::submitButton($model->isNewRecord ? 'Create' : 'Save'); ?> 
    </div><!-- /.row buttons-->

    <?php echo CHtml::endForm(); ?>
</div><!-- /.form -->

Profile.php

<?php
class Profile extends CActiveRecord
{
    ...
    /**
     * @see Cmodel::rules()
     */
    public function rules()
    {
        return array(
            // sex
            array('sex', 'required', 'message'=>'{attribute} が未選択です。'),
            array('sex', 'in', 'range'=>array(0, 1)),

            // birth
            array('birth', 'required'),
            array('birth', 'date', 'format'=>'yyyy-MM-dd'),

            // hobby
            array('hobby', 'required', 'message'=>'{attribute} が未選択です。'),
            array('hobby', 'checkHobby'),

            // body
            array('body', 'required'),
            array('body', 'length', 'max'=>1000),
        );
    }
    
    /**
     * Hobby validation
     */
    public function checkHobby($attribute, $params)
    {
        if (is_array($this->hobby)) {
            $pattern = '/^(' . implode('|', $this->hobbyOptions) . ')$/u';

            foreach ($this->hobby as $hobby) {
                if (!preg_match($pattern, $hobby)) {
                    $this->addError($attribute, '趣味の値が不正です');
                    break;
                }
            }
        }
    }

    /**
     * @see CActiveRecord::attributeLabels()
     */
    public function attributeLabels()
    {
        return array(
            'id' => 'ID',
            'sex' => '性別',
            'birth' => '生年月日',
            'hobby' => '趣味',
            'body' => '自己紹介文',
        );
    }
    
    /**
     * Gets sex options.
     * @return array sex options
     */
    public function getSexOptions()
    {
        return array(
            '男',
            '女',
        );
    }
    
    /**
     * Gets hobby options.
     * @return array hobby options
     */
    public function getHobbyOptions()
    {
        return array(
            '買い物' => '買い物',
            'スポーツ' => 'スポーツ',
            '旅行' => '旅行',
            'インターネット' => 'インターネット',
            '読書' => '読書',
            '映画鑑賞' => '映画鑑賞',
        );
    }
    
    /**
     * @see CActiveRecord::beforeSave()
     */
    protected function beforeSave()
    {
        $this->hobby = implode(', ', $this->hobby);
        return parent::beforeSave();
    }
}

ProfileController.php

<?php
class ProfileController extends Controller
{
    ...
    /**
     * Creates a new model.
     */
    public function actionCreate()
    {
        $model = new Profile;
        $model->sex = 0;
        $this->save($model);
    }
    
    /**
     * Updates a particular model.
     * @param integer $id a particular model.
     */
    public function actionUpdate($id)
    {
        $model = $this->loadModel($id);
        $model->hobby = explode(', ', $model->hobby);
        $this->save($model);
    }
    
    /**
     * Saves a model.
     */
    protected function save($model)
    {
        if (isset($_POST['Profile'])) {
            $model->attributes = $_POST['Profile'];

            if ($model->save()) {
                $this->redirect(array('index'));
            }
        }
        $this->render('_form', compact('model'));
    }
    ...
}