Mokka | platform software to easily analyze biomechanical data

I am writing MVC Rest online store. I use Spring Boot, Hibernate and PostgreSQL in my project. I have drinks and want to be able to sort them when I receive them. By name and price, everything is good, but I can't sort by popularity. For this I use Pagination and Sort. In the drink class, I use the ordersCount variable, which I marked with the @Formula annotation and wrote a sql-query. The request itself must take a drink from the cart by ID and return its quantity. Separately, I checked the request in the database, and it works correctly. But when I make a REST request, I get those drinks that are not in the basket at all. What could be the problem?

ENUM for Sorting type:

I have a table with several columns. One of the columns has the type DATE. When I try to insert a data to the table, I get me the following error:

My app is based on Spring Boot 2.2.5 including Vaadin 14. The project is built with Gradle 5.6.4 using the Vaadin Gradle Plugin 0.6.0

The Jenkins build pipeline fails with the following error:

I can't figure out what is wrong with my code and I'm not really good with jQuery. I'm trying to build HTML form will hold cars data. It's based on this form:

HTML source code is here.

Form data is sent on button click on the end back to program.

I upgraded that form with cascading manufacturer (proizvodjac in code) and car models droplist based on this code. But it's not working.

I keep receiving HTTP 400 which would mean that my POST call from client is malformed.

Here is my jQuery functions:

I want to sum 3d list values by first two criteria. What is the best way to get from this list