<?php

   public function actionGenre()
    {
        if(isset($_GET['id'])){
            $id = (int)$_GET['id'];
            $books = new CActiveDataProvider('Book', array(
                'criteria' => array(
                    'with' => array('genres'=>array('alias'=>'genre')),
                    'condition' => 'genre.genre_id=:genre_id',
                    'params' => array(':genre_id'=>$id),
                ),
                'pagination' => array(
                	'pageSize'=>20,
                ),
            ));
        }
        $this->render('genre', array('books'=>$books));
    }