Question

I’m trying to do something simple in JSF but I can’t get it working for some reason.
What I want is to post information with a form from a page reached with a GET parameter and keep this GET parameter whenever I submit the form.

<f:metadata>
    <f:viewParam name="someId" value="#{someController.something}" converter="#{someConverter}" />
</f:metadata>

This is the way I choose to bind the GET parameter, this is working fine when I’m doing the GET request.

On the very same page I have a

<h:form>
    <!-- (... various input ...) -->
    <h:commandLink action="#{someController.create}"  value="Create" />
</h:form>

When I submit it, even if data are right, I never get my “something” not to be null.

The use case is easy, I have a one to many relation and I want to access the “one” with the id as a GET parameter and list the “many” on the page and below the listing the form allows me to add a new element in the “many” list.

I’d like to make it work (of course) and be the cleaner possible,

Could someone tell me what’s the best way to achieve this?

Thanks!

Answer 1

Either make the SomeController bean @ViewScoped so that the bean lives as long as you’re interacting with the same view,

@ManagedBean
@ViewScoped
public class SomeController {
    // ...
}

or use <f:param> in UICommand components to pass GET parameters through

<h:commandLink>
    <f:param name="someId" value="#{param.someId}" />
</h:commandLink>