Add a filter for domain

Yes thanks for the reminder about cache and my apologies for the incomplete call for help. But I think I've got it!
with the domain_access module (which comes with it's own views) and the uc_views module enabled, I've added this to a custom module:

/*******************************************************************************
 * Add custom views filter: implementation of hook_views_data
 ******************************************************************************/

function uc_mymodule_views_data() {
  $data['uc_domain_orders']['table']['join']['uc_orders'] = array(
  'left_field' => 'order_id',
  'field' => 'order_id',
  );
  
  $data['uc_domain_orders']['domain_id'] = array(
    'title' => t('Store Domain'),
    'help' => t('The store from which the order was placed'),
    'filter' => array(
      'handler' => 'domain_views_handler_filter_domain_domain_id',
    ),
  );
  
  return $data;

}

flushed the cache and I now have a domain filter on ubercart orders