Getting extra fields

gistfile1.php

<?php

/* I used to be able to get the extra fields of 
** a k2 item by doing this:
*/

$id = $item->getId();

$db = JFactory::getDBO();
$query = "SELECT extra_fields FROM #__k2_items WHERE id={$id}";
$db->setQuery($query);
$row = $db->loadObject();

// Pre K2 2.6.2
$extrafields = K2ModelItem::getItemExtraFields($row);

/* After installing 2.5.2 update I the K2 data model for extra fields was updated. 
** it now asks for a second parameter, the item object. 
// function getItemExtraFields($itemExtraFields, &$item = null) item.php k2 model
*/ 

// What do I have to do to get this working again? I tried this:

$extrafields = K2ModelItem::getItemExtraFields($row, $item);

// not working. Any ideas?

This works:

require_once JPATH_SITE . '/components/com_k2/models/item.php';
require_once JPATH_SITE . '/components/com_k2/helpers/utilities.php';
$id = (int) $item->getId();
$db = JFactory::getDBO();
$query = "SELECT extra_fields FROM #__k2_items WHERE id={$id}";
$db->setQuery($query);
$row = $db->loadObject();
$extrafields = K2ModelItem::getItemExtraFields($row->extra_fields);

Forget it. That was an old code that was working for 2.6.1.

Better json_decode yourself as you did :)