how to save data when redirect to another page

Question

I use teamleaf and springboot.

When a new user is created, he is redirected to another page on which this user can create a card. The problem is that when forwarding, data about users is lost. That is, the card does not know who its creator is.

@Controller
public class PersonController 
    @RequestMapping(value = {"/addPerson"}, method = RequestMethod.POST)
    public String savePerson(Model model, 
                             @ModelAttribute("personForm") PersonForm personForm) {
    
        String firstName = personForm.getFirstName();
        String lastName = personForm.getLastName();
        double money = personForm.getMoney();
    
        if (firstName != null && firstName.length() > 0 //
                && lastName != null && lastName.length() > 0) {
          Person   newPerson = new Person(firstName, lastName, money);
            personService.save(newPerson);
    
            return "redirect:/addKonto";
        }
    
        model.addAttribute("errorMessage", errorMessage);
        return "addPerson";
    }

Kontocontroller

@RequestMapping(value = {"/addKonto"}, method = RequestMethod.POST)
    public String saveKonto(Model model, //
                            @ModelAttribute("kontoForm") KontoForm kontoForm) {

        String kontoName = kontoForm.getKontoName();
        double moneyInKonto = kontoForm.getMoneyInKonto();

        if (kontoName != null && kontoName.length() > 0) {
            Konto newKonto = new Konto(kontoName, moneyInKonto);
            kontoService.save(newKonto);

            return "redirect:/personList";
        }

user and card have a one-to-many relationship

public class Person {

    private String firstName;
    private String lastName;
    private double money;

    @OneToMany (mappedBy = "person", fetch = FetchType.EAGER, cascade = {CascadeType.PERSIST, CascadeType.REMOVE,
            CascadeType.MERGE})
    private Set<Konto> kontos = new HashSet<>();


public class Konto {
    private String kontoName;
    private double moneyInKonto;

    @ManyToOne(optional = false)
    @JoinColumn(name = "person_fk_id")
    private Person person;

how can I save user data when I go to another page, as well as save both the user and the card?

Answer 1

I guess an admin is adding the users and managing their cards. In this case you can use RedirectAttributes in order to pass the newly created user ID to the new page.

Have a look here https://stackoverflow.com/a/19269653/869793

It may also help you to pass the attributes directly through the URL.