final String sort = request.getSort();
    if (sort != null && !sort.equalsIgnoreCase(defaultSort)) {
      final PropertyDescriptor sortByDesc = propertyDescriptorService.getPropertyDescriptorByKey(sort);
      if (sortByDesc != null) {
        search.addSort(SortBuilders.fieldSort(sortByDesc.getEsKey()).order(request.getOrder()));
      } else {
        search.addSort(SortBuilders.fieldSort("_score").order(request.getOrder()));
      }
    } else {
        search.addSort(SortBuilders.fieldSort("_score").order(request.getOrder()));
    }