Weird, but maybe you guys can help.

I’m having a problem with the media upload field using add_more (not basic) but because its mixed with basic, I’m thinking this may be the issue, but the problem is, the media upload field is indexing the array of files I add to it, above an index of 0, so when I view the get_post_meta array, it starts its indexing at [2] instead of [0]
Which means when I look at the meta box in wordpress, the media files won’t show up because the array isn’t starting with [0].

Here is the code for my grouped piklist meta box:

piklist('field', array(
  'type' => 'group'
  ,'field' => 'mae_products'
  ,'add_more' => true
  ,'label' => __('Products', 'mae-eng')
  ,'list' => false
  ,'description' => __('Create your products, enter a name for the product, a price, a description and then choose images and/or videos.', 'mae-eng')
  ,'fields' => array(
    array(
      'type' => 'text'
      ,'field' => 'title'
      ,'label' => __('Product Title', 'mae-eng')
      ,'attributes' => array (
        'placeholder' => 'title'
      )
      ,'value' => ''
      ,'columns' => 9
    )
    ,array(
      'type' => 'text'
      ,'field' => 'price'
      ,'label' => __('$', 'mae-eng')
      ,'help' => __('Enter the price only in numbers, with a decimal if you need it, but no other characters, just numbers.', 'mae-eng')
      ,'attributes' => array (
        'placeholder' => '0.00'
      )
      ,'value' => ''
      ,'columns' => 3
    )
    ,array(
      'type' => 'editor'
      ,'field' => 'description'
      ,'label' => __('Description of the product.', 'mae-eng')
      ,'options' => array(
        'drag_drop_upload' => true
        ,'editor_height' => 100
        ,'media_buttons' => false
        ,'teeny' => true
        ,'quicktags' => true
        ,'tinymce' => array(
          'autoresize_min_height' => 100
          ,'resize' => true
          ,'wp_autoresize_on' => true
        )
      )
      ,'value' => ''
      ,'columns' => 12
    )
    ,array(
      'type' => 'group'
      ,'field' => 'filedownloads'
      ,'scope' => 'post_meta'
      ,'add_more' => true
      ,'list' => false
      ,'fields' => array(
        array(
          'type' => 'file'
          ,'field' => 'filedownload'
          ,'scope' => 'post_meta'
          ,'options' => array(
            'basic' => true
          )
          ,'label' => __('Product File', 'mae-eng')
          ,'help' => 'This is the file that they are purchasing. (XLS and PDF or any other file type(s) can be included)'
          ,'columns' => 12
        )
        ,array(
          'type' => 'text'
          ,'field' => 'filedowndesc'
          ,'label' => __('File Title', 'mae-eng')
          ,'attributes' => array(
            'placeholder' => __('title', 'mae-eng')
          )
          ,'columns' => 12
        )
      )
    )
    ,array(
      'type' => 'group'
      ,'field' => 'mae_media'
      ,'scope' => 'post_meta'
      ,'add_more' => true
      ,'list' => false
      ,'fields' => array(
        array(
          'type' => 'file'
          ,'field' => 'mediaupload'
          ,'scope' => 'post_meta'
          ,'label' => __('Upload Video/Image', 'mae-eng')
          ,'options' => array(
            'modal_title' => __('Add Video/Image', 'mae-eng')
            ,'button' => __('Add', 'mae-eng')
          )
          ,'preview_size' => 'medium'
          ,'columns' => 12
        )
        ,array(
          'type' => 'text'
          ,'field' => 'mediaurl'
          ,'label' => __('Enter Video URL', 'mae-eng')
          ,'attributes' => array(
            'placeholder' => __('YouTube/Vimeo URL', 'mae-eng')
          )
          ,'columns' => 12
        )
      )
    )
  )
));

AS you can see, I have two grouped add_mores, one for filedownloads and one for media (mae_media)
The group for filedownloads, is just a basic file field.
And the one for media (mae_media) is for the wordpress media uploader.

Heres what I did, so you can reproduce it.
I added two files to the BASIC filedownloads add_more, then I added 3 files to the media (mae_media) add_more.
After clicking submit, the post_meta array that is built, has an index for the mae_media array that starts at [2] instead of [0].

The post meta looks like this:

a:1:{i:0;a:5:{s:5:”title”;s:15:”Diet Calculator”;s:5:”price”;s:6:”299.00″;s:11:”description”;s:248:”The majority of people know how important it is to maintain the right amount of carbs/protein and other important nutrients in your everyday diet, but I personally hate counting them up day in and day out. My spreadsheet makes it much much simpler.”;s:13:”filedownloads”;a:2:{i:0;a:2:{s:12:”filedowndesc”;s:15:”Diet Calculator”;s:12:”filedownload”;a:1:{i:0;i:5463;}}i:1;a:2:{s:12:”filedowndesc”;s:19:”Supporting Document”;s:12:”filedownload”;a:1:{i:0;i:5464;}}}s:9:”mae_media”;a:3:{i:2;a:2:{s:11:”mediaupload”;a:1:{i:0;s:4:”5454″;}s:8:”mediaurl”;s:0:””;}i:3;a:2:{s:11:”mediaupload”;a:1:{i:0;s:4:”5455″;}s:8:”mediaurl”;s:0:””;}i:4;a:2:{s:11:”mediaupload”;a:1:{i:0;s:4:”5456″;}s:8:”mediaurl”;s:0:””;}}}}

If I change the post_meta near the end where it says “mae_media” and I change the indexes from i:2, i:3, i:4 to i:0, i:1, i:2

Then the media shows up in the wordpress metabox.
But when I click update or save and change something, the array is reindexed incorrectly again.

Hope that explains it.

Marcus