Order by relationship post title

• cecilehabran

• January 15, 2015 at 12:59 am

Hi,
I’ve a custom post type called “Book”, for which I link custom posts type called “Author” with ACF relationship field.
I would like to order the book posts by their linked author name (the title of the custom post).
What’s the better way to do that?

• James

• June 25, 2015 at 7:33 pm

Hi @cecilehabran

Thank you for the question.

You can achieve this by hooking into the acf/fields/relationship/query filter. You can modify the $args array as follows:

<?php

function my_relationship_query( $args, $field, $post )
{
    // increase the posts per page
    $args['posts_per_page'] = 25;
    $args['orderby'] = 'title';
    return $args;
}

// filter for a specific field based on it's name
add_filter('acf/fields/relationship/query/name=my_select', 'my_relationship_query', 10, 3);

?>

You can have a look at the following resource page