selectonemenu and dialog of primefaces

Question

Hello, everyone. At the moment I’m having a problem with prime faces which is a library of visual components of Java.

The problem I am having is the following: On the login screen of my system, there is a commandButton to call a dialog that contains the form to register new users. Within this form, there is a selectOneMenu that must be loaded with the States of Brazil for the user to choose. The point is that this selectOneMenu is not loading. When I click on it, it is empty.

I want to warn you that I tried to remove selectOneMenu from the dialog and put it in the form of the page, but it still gives the same problem.

So I would like to ask you for help. I am sending you the codes of the main components related to the login screen

Main.xhtml (system login page)

<ui:composition template="/WEB-INF/template/LayoutMain.xhtml"
xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:p="http://primefaces.org/ui"
xmlns:a="http://xmlns.jcp.org/jsf/passthrough">
<h:head>
<f:facet name="first">
    <meta name="viewport" content="width-device-width, inicial-scale=1"/>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
</f:facet>  
    <title><ui:insert name="titulo">Sistema de Rastreamento de Gado</ui:insert></title>
    <h:outputScript name="locale-primefaces.js" library="js" />
    <h:outputStylesheet library="css" name="sistema.css" />
</h:head>
<ui:define name="titulo">Rastrbov</ui:define>

<ui:define name="corpo">

    <f:metadata>
        <f:viewParam name="Dummy" />
        <f:event listener="#{loginBean.preRender}" type="preRenderView"></f:event>
    </f:metadata>

    <h:form prependId="false">
        <header class="main-topbar">

                <h:link outcome="/Home">
                    <h:graphicImage library="images" name="Rastrbov.png" styleClass="rastrbovPng" />
                </h:link>

            <div style="float: right;">

                <div style="float: left; line-height: 70px; margin-right: 30px;">
                    <p:inputText size="20" id="j_username" value="#{loginBean.nome}"
                        a:placeholder="&#128231;Login" />
                </div>
                <div style="float: left; line-height: 70px; margin-right: 30px;">
                    <p:password size="20" id="j_password"
                        a:placeholder="&#128273;Senha" />
                </div>

                <div style="float: left; line-height: 70px; margin-right: 10px;">
                    <p:commandButton value="Entrar" action="#{loginBean.login}"
                        ajax="false" styleClass="botaoLogin"/>


                </div>
                <div  style="line-height: 0px; margin-right: 10px;" >
                    <p:commandLink
                        styleClass="esqSenha"
                        value="Esqueceu sua senha?"
                        onclick="PF('varDialogResetarSenha').show()" type="button" />
                </div>
            </div>


        </header>
    </h:form>


    <h:form prependId="false">
        <p:panel styleClass="cadastrese" style="width:400px">
            <p:messages id="messages" autoUpdate="true" closable="true" />
            <br />
            <br />
            <p:outputLabel value="Seja bem-vindo ao sistema RastrBov"
                style="font-weight:bold;font-size:40px" />
            <p:commandButton value="Cadastre-se" size="50"
                onclick="PF('dlgCadastrarUsuario').show()"
                styleClass="botaoCadastrar"/>
        </p:panel>

        <p:dialog header="Cadastro de usuário" widgetVar="dlgCadastrarUsuario"
        modal="true" height="400">

        <h:form id="frmCadastroUser" prependId="false">

        <p:toolbar style="margin-top: 20px">
            <p:toolbarGroup >
                <p:button value="Novo" outcome="/usuario/CadastroUsuario"
                    disabled="#{cadastroUsuarioBean.editando}" />
                    <p:commandButton value="Salvar" id="botaoSalvar"
                    action="#{cadastroUsuarioBean.salvar}" update="@form" />
            </p:toolbarGroup>

        </p:toolbar>

        <p:panel>
        <p:panelGrid columns="2" id="painel"
            style="width: 100%; margin-top: 20px" columnClasses="rotulo, campo">

            <p:outputLabel value="Estado" for="estado2" />
            <p:selectOneMenu id="estado2" style="width:52%"
                value="#{LoginBean.usuario.estado}" label="Estado"
                required="true" requiredMessage="Informe o estado de residência">
                <f:selectItem itemLabel="" noSelectionOption="true" />
                <f:selectItems value="#{LoginBean.listEstados}"
                    var="estado" itemValue="#{estado}"
                    itemLabel="#{estado.estado_sigla}" />
                <!-- <p:ajax listener="#{cadastroUsuarioBean.carregarCidades}" update="cidade" /> -->
            </p:selectOneMenu>

        </p:panelGrid>
        </p:panel>
        </h:form>
        </p:dialog>
    </h:form>
    <p:separator style="margin-top:300px" />

    <footer> </footer>

</ui:define>

At the end of the code, I declared the dialog. Inside the dialog there is only the status selectOneMenu because I removed the other components for easy viewing.

Loginbean.java (The bean that handles the actions performed on the Main.xhtml screen)

package com.sisRastrbov.controller;

import java.io.IOException;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;

import javax.enterprise.context.SessionScoped;
import javax.faces.context.FacesContext;
import javax.faces.model.SelectItem;
import javax.inject.Inject;
import javax.inject.Named;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.sisRastrbov.model.Estado;
import com.sisRastrbov.model.Usuario;
import com.sisRastrbov.repository.EstadosRep;
import com.sisRastrbov.util.jsf.FacesUtil;

@Named
@SessionScoped
public class LoginBean implements Serializable {

private static final long serialVersionUID = 1L;

@Inject
private FacesContext facesContext;

@Inject
private HttpServletRequest request;

@Inject
private HttpServletResponse response;

@Inject
private EstadosRep estadosRep;

private Usuario usuario;

private String nome;

private Estado estado;

private List<SelectItem> listEstados;


public void login() throws ServletException, IOException{
    RequestDispatcher dispatcher = request.getRequestDispatcher("/j_spring_security_check");
    dispatcher.forward(request, response);

    facesContext.responseComplete();
}
public void preRender(){
    if("true".equals(request.getParameter("invalid"))){
        FacesUtil.addErrorMessage("Usuário ou senha invalido!");
    }
    System.out.println("estou carregando estados");
    listEstados = new ArrayList<SelectItem>();

    List<Estado> estados = estadosRep.raizes();

    for (Estado e : estados) {
        SelectItem item = new SelectItem();
        item.setLabel(e.getEstado_sigla());
        item.setValue(e);
        listEstados.add(item);
        System.out.println(e);
    }
    if (this.estado != null) {
        estados = estadosRep.raizes();
    }
}

public String getNome() {
    return nome;
}

public void setNome(String nome) {
    this.nome = nome;
}
public EstadosRep getEstadosRep() {
    return estadosRep;
}
public void setEstadosRep(EstadosRep estadosRep) {
    this.estadosRep = estadosRep;
}
public List<SelectItem> getListEstados() {
    return listEstados;
}
public void setListEstados(List<SelectItem> listEstados) {
    this.listEstados = listEstados;
}
public Estado getEstado() {
    return estado;
}
public void setEstado(Estado estado) {
    this.estado = estado;
}
public Usuario getUsuario() {
    return usuario;
}
public void setUsuario(Usuario usuario) {
    this.usuario = usuario;
}
}

In this bean, the key is the preRender method that is used to load the status selectonemenu at the time Main.xhtml is started.

stateRep.xhtml (Rep that contains the main actions performed with databases. In this case, the actions are performed with the state table)

package com.sisRastrbov.repository;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;

import javax.inject.Inject;
import javax.persistence.EntityManager;

import com.sisRastrbov.model.Estado;

public class EstadosRep implements Serializable {

private static final long serialVersionUID = 1L;

@Inject 
private EntityManager manager;

public Estado porSigla(String estado_sigla) {
    return manager.find(Estado.class, estado_sigla);
}

public List<Estado> raizes(){
    return  manager.createQuery("from Estado",Estado.class).getResultList(); 
}

public List<Estado> listarEstado() {
    List<Estado> estados = new ArrayList<Estado>();
    estados= manager.createQuery("from Estado", Estado.class).getResultList();
    return estados;
}
}

Java state. (State class statement. It is used to create the State table in the database)

package com.sisRastrbov.model;

import java.io.Serializable;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
import javax.validation.constraints.NotNull;

@Entity
@Table(name = "estado")
public class Estado implements Serializable {

private static final long serialVersionUID = 1L;

private String estado_sigla;
private String estado_nome;

@Id
@Column(nullable = false, length = 2)
public String getEstado_sigla(){
    return estado_sigla;
}

public void setEstado_sigla(String estado_sigla){
    this.estado_sigla = estado_sigla;
}

@NotNull
@Column(nullable = false, length = 50)
public String getEstado_nome(){
    return estado_nome;
}

public void setEstado_nome(String estado_nome){
    this.estado_nome = estado_nome;
}

@Override
public int hashCode() {
    final int prime = 31;
    int result = 1;
    result = prime * result + ((estado_sigla == null) ? 0 : estado_sigla.hashCode());
    return result;
}

@Override
public boolean equals(Object obj) {
    if (this == obj)
        return true;
    if (obj == null)
        return false;
    if (getClass() != obj.getClass())
        return false;
    Estado other = (Estado) obj;
    if (estado_sigla == null) {
        if (other.estado_sigla != null)
            return false;
    } else if (!estado_sigla.equals(other.estado_sigla))
        return false;
    return true;
}


}

I hope for answers and thank you all.

Answer 1

Try modifying the line

<f:selectItems value="#{LoginBean.listEstados}" var="estado" itemValue="#{estado}" itemLabel="#{estado.estado_sigla}" />

for

<f:selectItems value="#{LoginBean.listEstados}" />

for the method getListEstados() is returning a list of SelectItem, that already has the label and value set.