Reply To: Clone field value from Relationship post

• John Huebner

• April 6, 2019 at 4:25 am

add_action('acf/save_post', 'save_event_update_address', 20);
function save_event_update_address($post_id) {
  if (get_post_type($post_id) != 'events') {
    // not and event post, bail
    return;
  }
  // get location post ID
  // you said it's a relationship field, a relationship field will turn an array of posts
  // I am setting the 3rd parameter because we only need the IDs
  $related_places = get_field('relationship_field_name', $post_id, false);
  if ($related_places) {
    $place_id = $related_places[0];
    $address = get_field('address_field_on_place_name', $place_id);
    update_field('address_field_on_event_name', $address, $post_id);
  }
}