How to pass data from a Datatable line to a Dialog in Primefaces

Question

I have a Datatable in which I have several data and a select button. When I click the select button I call a Dialog with a few more fields. I would like to click on the button select it to take the data of the Object and fill in the fields of this Dialog.

This is the method that generates the Dialog:

@ManagedBean(name="dtBasicView")
@ViewScoped
public class ListaProcedimentosBean {
    public void abrirDialogo() {
            Map<String, Object> opcoes = new HashMap<>();
            opcoes.put("modal", true);
            opcoes.put("resizable", false);
            opcoes.put("contentHeight", 670);
            opcoes.put("contentWidth", 870);
            RequestContext.getCurrentInstance().openDialog("procedimentosPesquisaCompleta", opcoes, null);
        }
}

And here is the select button:

<p:column headerText="Opções">
                <p:commandButton value="Selecionar" icon="ui-icon-search" action="#{dtBasicView.abrirDialogo}" process="@this">
                </p:commandButton>

Anyone can help?

Answer 1

I understand you’re using the component Dialog Framework of the Primefaces. The third parameter of the method openDialog(pagina, opcoes, params) serves to be passed the data (parameters) to the dialog, the bad of this method parameter is that only one is accepted HashMap of List<String>.

Therefore, one approach that can be taken is to pass the item code to the method openDialog() and in the ManagedBean from the dialog page retrieve that code that is as parameter, and after that load the remaining data and display them on the dialog page.

For example:

Pass the selected object to the ManagedBean

<p:column headerText="Opções">
    <p:commandButton value="Selecionar" icon="ui-icon-search" 
                     action="#{dtBasicView.abrirDialogo}" process="@this">
        <f:setPropertyActionListener target="#{dtBasicView.objetoSelecionado}" value="#{objeto}" />
    </p:commandButton>
</p:column>

Grab the selected object and open the dialog

public void abrirDialogo() {
  Map<String, Object> optionsDialog = new HashMap<>();
  optionsDialog.put("modal", true);
  optionsDialog.put("resizable", false);
  optionsDialog.put("contentHeight", 670);
  optionsDialog.put("contentWidth", 870);

  Map<String, List<String>> params = new HashMap<>();
  params.put("meuParametro", Arrays.asList(""+objetoSelecionado.getCodigo()));           

  RequestContext.getCurrentInstance()
      .openDialog("procedimentosPesquisaCompleta", optionsDialog, params);
}

Take the parameter passed to the dialog

It can be in the builder of ManagedBean that controls the open tab in the dialog.

String paramResposta = ((HttpServletRequest) FacesContext.getCurrentInstance().getExternalContext()
    .getRequest()).getParameter("meuParametro");

    if(paramResposta != null && !paramResposta.isEmpty()){
        int codigo = Integer.parseInt(paramResposta);
        Objeto = dao.buscarPorCodigo(codigo);
    }