public SearchDiscountResponse searchDiscount(SearchDiscountRequest request) {
   List<Discount> discounts =
       discountDao.find(
           request.getDiscountFrom(),
           request.getDistanceLessThan(),
           request.getGroupName(),
           request.getMerchantName(),
           request.getTags());
   return Assembler.convertToDiscountResponse(discounts, request);
 }