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update_field with a relationship field

  • I am trying to set up a form within a custom post type that creates a new post of another post type and passes on custom fields from the first to the second. This I have working apart from the relationship fields.

    I am pulling the title of a third post type in a relationship field into a hidden field in the form like this:

    $posts = get_field('client'); 
       if( $posts ): ?>
          <?php foreach( $posts as $post): // variable must be called $post (IMPORTANT) ?>
          <?php setup_postdata($post); ?>
             <input type="hidden" name="client" value="<?php the_title(); ?>" />
          <?php endforeach; ?>
          <?php wp_reset_postdata(); ?>
       <?php endif; ?>

    The new post is then created with wp_insert_post() and the text fields added using update_field(). For populating the relationship fields I think I need to use an array but I can’t work out how. Something like:

    $client = array($_POST['client'] => the_title() );
    update_field( 'field_xxx', $client, $pid );

    There are a few posts on here that brush on this but I can’t find any clear answers.

  • Hello,

    did you try to hook on :
    add_filter('acf/save_post' , 'your_save_post_function', 10, 1 );

    and update your field into the function ?

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