Make Inline entity form support field collection

I really like to have inline_entity_form and field_collection could be work together, so I write an integration module for this.
I found it will be saved a lot of codes, if a little change can be made on the inline_entity_form:
just change:

function inline_entity_form_field_attach_submit($parent_entity_type, $parent_entity, $form, &$form_state) {
    .....
    list($entity_id) = entity_extract_ids($entity_type, $item['entity']);
    $entity_ids[] = array($values['settings']['column'] => $entity_id);
   ....
}

to

function inline_entity_form_field_attach_submit($parent_entity_type, $parent_entity, $form, &$form_state) {
    .....
    list($entity_id, $vid, $anything) = entity_extract_ids($entity_type, $item['entity']);
   if(isset($values['settings']['columns'])){
      $entity_ids[] = array($values['settings']['columns']['id'] => $entity_id, $values['settings']['columns']['vid'] = $vid);
   }else {
      $entity_ids[] = array($values['settings']['column'] => $entity_id);
   }
   ....
}

, then, field collection will work happily with inline entity form, field collection user following code to insert a new field_collection_item:

/**
 * Implements hook_field_insert().
 */
function field_collection_field_insert($host_entity_type, $host_entity, $field, $instance, $langcode, &$items) {
  foreach ($items as &$item) {
    if (isset($item['entity'])) {
      if ($entity = field_collection_field_get_entity($item)) {
        if (!empty($entity->is_new)) {
          $entity->setHostEntity($host_entity_type, $host_entity, LANGUAGE_NONE, FALSE);
        }
        $entity->save(TRUE);
        $item = array(
          'value' => $entity->item_id,
          'revision_id' => $entity->revision_id,
        );
      }
    }
  }
}