Best way to find id from other field?

Hello,

I was curious as to what's the best way is to find a row's id based
off another field's value.

example:

function sortByGenre($genre_name) {
$genre = $this->Game->Genre->find('all', array('conditions'=>array
('value'=>$category_name)));
$genre_id = $genre[0]['Genre']['value'];
}

...Now I know there's got to be a better way. Does cakePHP have any
convenience functions or any other way to make this simpler? I have a
feeling I'm approaching this in the completely wrong way.

David
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