Weblabor

class News extends AppModel{
	var $name = 'News';
	var $hasMany = array('Comments'=>array('className'=>'Comments'));  //comment model megívása
	var $virtualFields = array(
		'comment_count' => 'SELECT COUNT(*) FROM comments as Comments WHERE News.id=Comments.news_id',
		'author' => 'SELECT username FROM users as Users WHERE Users.id=News.user_id'
	);
}

class Comments extends AppModel {  
    var $name = 'Comments';  
	var $virtualFields = array(
		'author' => 'SELECT username FROM users as Users WHERE Users.id=Comments.user_id'
	);
    var $belongsTo = array('News'); //átadom a news modelnek 
} 

...

function read($url){
		$this->updateNewsread($url);
		$this->set('news', $this->News->findByUrl($url)); 
		$this->set('comments', $this->paginate('Comments'));
	}
private function updateNewsread($url){
		$this->News->query('UPDATE news SET readed=readed+1 WHERE news.url="'.$url.'"');
	}
...