What function can I use to select child div of class=rate_stars.

I have a variable range from 1 - 5 and I want to select child div with that specific data-rating.

I have tried

 $('rate_widget').find().attr('data-rating', info).prevAll().andSelf().addClass('ratings_vote');

But it did't work.

<div id=r1 class=rate_stars

                             data-post-id=<?php echo $post_id ?>

                             data-user-id=<?php echo $user_id;  ?>

                             data-nonce=<?php echo $nonce ?>

                            >

    <div data-rating=1 class=ratings_stars></div>

    <div data-rating=2 class=ratings_stars></div>

    <div data-rating=3 class=ratings_stars></div>

    <div data-rating=4 class=ratings_stars></div>

    <div data-rating=5 class=ratings_stars></div>

    <div class=total_votes>vote data</div>

</div>