Route parameter always null in Vaadin 24 Spring Boot project

General
1

Hi,
I’m using Vaadin 24 with Spring Boot 3.0.5 and Java 17. I have a simple view with a route parameter, but the parameter is always null when I navigate to the view.

Example code:

@Route("test/:id")
public class TestView extends VerticalLayout implements HasUrlParameter<Integer> {
    @Override
    public void setParameter(BeforeEvent event, @OptionalParameter Integer id) {
        System.out.println("TEST DEBUG: id = " + id);
        add(new H1("Test ID: " + id));
    }
}

When I go to /test/1, the output is always id = null.

  • The route is registered and visible in the route registry.
  • I have no conflicting REST controllers or static resources.
  • My main application class is in the correct package.
  • I have tried both Integer and String as the parameter type.

Here is a link to my full Github project → GitHub - Jmorkcho/CinemaApp at wip.
These are the 2 views I’ve tested this:
CinemaApp/src/main/java/com/finals/cinema/view/MovieDetailsView.java at wip · Jmorkcho/CinemaApp · GitHub
and
CinemaApp/src/main/java/com/finals/cinema/view/TestView.java at wip · Jmorkcho/CinemaApp · GitHub

And here is a screenshot:
image

Console output:

TEST DEBUG: id = null
DEBUG: setParameter called with id = null
DEBUG: setParameter called with id = null

What could cause Vaadin to always pass null for the route parameter?
Thanks for the help in advance,
Y. P.

2

You are mixing different concepts. Route Parameter are not related to Url Parameter.

Replace HasUrlParameter with BeforeEnterObserver and get your value from event.getRouteParameters().get("id").

P.S. your Spring Boot Version is EoL

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