Multisite cross-site post selection

• chrispink

• March 17, 2024 at 11:02 am

This is a discussion in two parts.
First is a piece of code for getting CPTs from another Site on a Multisite Network
The second is a call for ideas on how I can filter this dynamically (like the Relationship field)
The custom post type is called partner and the Select* field to load it into is called site7_partners

This was implemented as a Relationship field around 10 years ago and, although I did find that code, it no longer works.

function acf_load_partner( $field ) {

    $field['choices'] = array();
  
    switch_to_blog(7);

    $args = array(
        'post_type' => 'partner',
        'posts_per_page' => -1,
        'post_status' => 'publish',
        'orderby' => 'title',
        'order' => 'ASC',
    );

    $page_query = new WP_Query($args);

    if ($page_query->have_posts()) {
        while ($page_query->have_posts()) {
            $page_query->the_post();
            $field['choices'][get_the_ID()] = get_the_title();
        }
    }

    wp_reset_postdata();
    restore_current_blog();
    // return the field
    return $field;
}

add_filter('acf/load_field/name=site7_partners', 'acf_load_partner', 999, 1);