public static CartItem fromResultSet(ResultSet resultSet) throws SQLException {
   CartItem cartItem = new CartItem();
   cartItem.setProductId(resultSet.getInt(resultSet.findColumn(COLUMN_ID_PRODUCT)));
   cartItem.setCartId(resultSet.getInt(resultSet.findColumn(COLUMN_ID_CART)));
   cartItem.setAmount(resultSet.getInt(resultSet.findColumn(COLUMN_AMOUNT)));
   return cartItem;
 }