EDIT

/**

 * Extends the $cdm_entity object by the field if it is not already existing.

 *

 * This function can only be used for fields with 1 to many relations.

  *

 * @param $cdm_base_type

 * @param $field_name

 * @param $cdm_entity

 */

function cdm_lazyload_array_field($cdm_base_type, $field_name, &$cdm_entity)

{

  if (!isset($cdm_entity->$field_name)) {

    $items = cdm_ws_fetch_all('portal/' . $cdm_base_type . '/' . $cdm_entity->uuid . '/' . $field_name);

    $cdm_entity->$field_name = $items;

  }

}