How do I enable choosing a row of a h:dataTable using JSF 2.0?

Question

Hello, I'm starting a small project, using JSF 2.0. I'm having problems right in the start, in the CRUD of the first model implemented.

What I want to do is pretty simple:

The page has some filters to search, and using ajax, it populates a h:dataTable with the results. The user should now select the line with the result he wants to see/edit. But I just can't find a way to make the line selectable.

This is my table:

<h:dataTable var="aluno" value="#{alunoController.resultado}" >
  <h:column>
     #{aluno.id}
  </h:column>
  <h:column>
     #{aluno.nome}
  </h:column>
  <h:column>
     <!-- radiobutton, commandLink/Action goes gere -->
  </h:column>
</h:dataTable>

First I tried having a radiobutton on each line, then I learned that I cant have a radiogroup inside a table.

Then I tried having a radio group inside the first cell of each line, and handling selecion with a little bit of javascript. Somehow, the databinding doesn't work, and I cant get the selected model back in my ManagedBean.

So I tried having a commandButton/Link, which sends the model via parameter.... not. It just refresh the page.

The I tried using query parameters, sending the id of that row and getting the model from de database again, but I cant find a way to tell wich method should be called in the ManagedBean.

So I came here for my very first time, looking for suggestions. What should I do? Am I missing some information?

Tell me if you need more information.

I just don't want to believe what I want to do is too advanced.

Sorry for the bad english.

Answer 1

I would recommend to you to use PrimeFaces components.

Allowing you to choose single rows. See Show Case

Answer 2

The JSF 2.0 way is to put managed bean in view scope. You can do that using @ViewScoped.

@ManagedBean
@ViewScoped
public class Bean {}

This way the bean will be preserved for the subsequent request and retained when the target view of the subsequent request is the same.

See also:

• Benefits of pitfalls of @ViewScoped - Contains a simple CRUD example