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Clone sub field values from relationship post

  • I found this topic from 2019 which was solved. But was trying to make this work with sub fields. i.e. – What if the Events fields were repeater fields that could be populated multiple Places fields (Map/Address fields, etc.). I gave it a shot below, but I’m missing something.

    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
      // 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
      $related_places = get_sub_field('relationship_field_name');
      // also the 
      if ($related_places) {
        $place_id = $related_places[0];
        $address = get_field('address_field_on_place_name', $place_id);
        update_sub_field('address_field_on_event_repeater_name, $address, $post_id);
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