Dima Kh

I have one ObservableList for two ComboBoxes. I want to user cannot choose the same item in two different ComboBoxes. If the user choose item in "first" box it must be disabled in "second" and vise versa. How can I achive it?

public class Controller implements Initializable {    ObservableList<String> items = FXCollections.observableArrayList("first", "second", "third", "forth", "fifth");    @FXML    private ComboBox<String> first;    @FXML    private ComboBox<String> second;    @Override    public void initialize(URL url, ResourceBundle resourceBundle) {        first.getItems().addAll(items);        second.getItems().addAll(items);        first.setCellFactory(new Callback<>() {            @Override            public ListCell<String> call(ListView<String> stringListView) {                return new ListCell<>() {                    @Override                    protected void updateItem(String s, boolean b) {                        super.updateItem(s, b);                        if (b)                            setText(null);                        else {                            if (second.getValue() != null) {                                if (second.getValue().equals(s)) {                                    setText(s);                                    setDisable(true);                                } else setText(s);                            }                        }                    }                };            }        });    } }

Thanks in advanced

I have solved this error edited Taco class like:
private List<String> ingredients; to private List<Ingredient> ingredients;
write converter for it because thymeleaf returns String from form:
@Component public class IngredientByIdConverter implements Converter<String, Ingredient>{    private final IngredientRepository ingredientRepo;    @Autowired    public IngredientByIdConverter(IngredientRepository ingredientRepo) {        this.ingredientRepo = ingredientRepo;    }    @Override    public Ingredient convert(String id) {        Optional<Ingredient> optionalIngredient = ingredientRepo.findById(id);        return optionalIngredient.isPresent() ?                optionalIngredient.get() : null;    } }
And added it to configuration class:
   @Autowired    private IngredientRepository ingredientRepository;    @Override    public void addFormatters(FormatterRegistry registry) {        registry.addConverter(new IngredientByIdConverter(ingredientRepository));    }

Stephan van Hulst I've tried to delete final and I have gotten the same exception but without text:"private final"

I am following Spring in Action 5 and have error:
org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.springframework.orm.jpa.JpaSystemException: Error accessing field [private final java.lang.String org.server.models.Ingredient.id] by reflection for persistent property [org.server.models.Ingredient#id] : SLSA; nested exception is org.hibernate.property.access.spi.PropertyAccessException: Error accessing field [private final java.lang.String org.server.models.Ingredient.id] by reflection for persistent property [org.server.models.Ingredient#id] : SLSA org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1014) org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909) javax.servlet.http.HttpServlet.service(HttpServlet.java:660) org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) javax.servlet.http.HttpServlet.service(HttpServlet.java:741) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
That`s how my entity Ingredient looks:
@Data @RequiredArgsConstructor @NoArgsConstructor(access = AccessLevel.PRIVATE, force = true) @Entity @Table(name = "ingredient", schema = "public") public class Ingredient {    @Id    @Column(columnDefinition = "String", name = "id")    private final String id;    private final String name;    @Enumerated(EnumType.STRING)    private final Type type;    public static enum Type{        WRAP, PROTEIN, VEGGIES, CHEESE, SAUCE    } }
And  my Taco entity:
@Data @Entity @Table(name = "taco", schema = "public") public class Taco {    @Id    @GeneratedValue(strategy = GenerationType.IDENTITY)    private int id;    private Date createdAt;    @NotNull    @Size(min = 3, message="Name must be at least 3 characters long")    private String name;    @ManyToMany(targetEntity = Ingredient.class)    @Size(min=1, message="You must choose at least 1 ingredient")    private List<String> ingredients;    @PrePersist    void createdAt(){        this.createdAt = new Date();    } }
In @Controller I am trying to save new Taco()  to Database but have the error above.
My Controller:
@Controller @RequestMapping("/design") @SessionAttributes("order") public class DesignTacoController {    private final IngredientRepository ingredientRepository;    private final TacoRepository tacoRepository;    @Autowired    public DesignTacoController(IngredientRepository ingredientRepository, TacoRepository tacoRepository) {        this.ingredientRepository = ingredientRepository;        this.tacoRepository = tacoRepository;    }    @ModelAttribute(name = "order")    public Order order(){        return new Order();    }    @GetMapping    public String showDesignForm(Model model){        List<Ingredient> ingredients = new ArrayList<>();        ingredientRepository.findAll().forEach(i -> ingredients.add(i));        Type[] types = Ingredient.Type.values();        for (Type type : types){            model.addAttribute(type.toString().toLowerCase(),                    filterByType(ingredients, type));        }        return "welcomePage";    }    private List<Ingredient> filterByType(List<Ingredient> ingredients, Type type) {        return ingredients                .stream()                .filter(x -> x.getType().equals(type))                .collect(Collectors.toList());    }    @ModelAttribute(name = "taco")    public Taco taco(){        return new Taco();    }    @PostMapping    public String processDesign(@Valid Taco taco, Errors errors, @ModelAttribute Order order){        if(errors.hasErrors()) {            return "welcomePage";        }        Taco saved = tacoRepository.save(taco);        order.addDesign(saved);        return "redirect:/orders/current";    } }
Why am I getting this error and how can I fix it? Thanks for advance.