end goal: I want to copy a bunch of meta data from one post to the one I’m editing.

I figured I’d start with the update multiple field. Here’s what I have so far:

piklist('field', array(
  'type' => 'select'
    ,'field' => 'update_multiple'
    ,'label' => __('Update Multiple Fields', 'piklist-demo')
     ,'choices' => piklist(
                             get_posts(array(
                                'post_type' => 'event'
                                ,'numberposts' => -1
                                ,'orderby' => 'title'
                                ,'order' => 'ASC'
                            ))
                            ,array('ID', 'post_title')
                        )
    ,'conditions' => array(
      array(
        'type' => 'update'
        ,'value' => 'true'
        ,'field' => 'update_multiple_1'
        ,'update' => __('Value 1', 'piklist-demo')
      )
      ,array(
        'type' => 'update'
        ,'value' => ''
        ,'field' => 'update_multiple_1'
        ,'update' => null
      )
      ,array(
        'type' => 'update'
        ,'value' => 'true'
        ,'field' => 'update_multiple_2'
        ,'update' => __('Value 2', 'piklist-demo')
      )
      ,array(
        'type' => 'update'
        ,'value' => ''
        ,'field' => 'update_multiple_2'
        ,'update' => null
      )
    )
  ));

  piklist('field', array(
    'type' => 'text'
    ,'label' => __('Update 1', 'pilist-demo')
    ,'field' => 'update_multiple_1'
  ));

  piklist('field', array(
    'type' => 'text'
    ,'label' => __('Update 2', 'pilist-demo')
    ,'field' => 'update_multiple_2'
  ));

That’s as far as I’ve gotten. I can select a post from the select option choices but how do I get the selected post data so I can copy it to the other meta fields?