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Oops, I forgot to explain , what I want to achieve, I want to display the thumbnails of all authors, every thumbnail should get a different random class, what's the best way to achieve this ? using the code above ?

Hi Peter,
I think it was for a custom field, to edit directly on the admin page, without entering the post page, maybe a month ago, I am not sure, thanks for asking

please disregard my bad, sorry

Please delete this, I made a little logical error here

Too bad , got rexcited too fast, this code works but it only displays the thumbnail

the printf line is wrong : it should just be : the_title()

Hi,
I just found out how to do it, here for whoever has the same problem,
just add a codeblock in the repeater and add the following :

<?php
	$connected = new WP_Query( [
    'relationship' 	=> [
        'id'   		=> 'add-here-the-id-of-your-relationship',
        'to' 		=> get_the_ID(),],
    'nopaging'		=> true,
] );
while ( $connected->have_posts() ) : $connected->the_post();
    ?>
    <a href="<?php the_permalink(); ?>"><?php the_title(); ?></a>
<?php
		endwhile;
		wp_reset_postdata();
?>