Reply To: Save ACF relationship (name) value to ACF text field

• John Huebner

• August 4, 2021 at 4:17 pm

1) change your filter to an acf/save_post filter with priority > 10 ensure that values are saved to the DB before you try using them.

2) Get the value of the relationhip field, unformatted, from the project post being saved.

$kuenstlerinnen_id = get_field ('project_to_kunstlerin', $post_id, false);

The above value could be an array

if (is_array(kuenstlerinnen_id)) {
  $kuenstlerinnen_id = kuenstlerinnen_id[0];
}

get the last name field from the other post

$artist_nachname = get_field('artist_nachname', $kuenstlerinnen_id;

update the field on the project with this value

update_field('project_kunstlerin_nach_name_sort', $artist_nachname, $post_id);