java – SelectOneMenu is not powered

Question:

I have a p:selectOneMenu and would like it to be fed with existing data in the database as soon as the page is loaded:

page.xhtml

<p:selectOneMenu id="carros">
    <f:selectItem itemLabel="Carros" itemValue="0"/>
    <f:selectItems value="#{menuManagedBean.carros}" var="carro" itemLabel="#{carro.modelo}" itemValue="#{carro}"/>
</p:selectOneMenu>

MeuManagedBean.java

@ManagedBean
@RequestScoped
public class MeuManagedBean {

    private String modelo;
    private int codigo;
    private ArrayList<MeuManagedBean> carros;
    //getter-setter

    @PostConstruct
    public void attCarros() {
        carros = new CarroDAO.metodoDAO();
    }
}

CarroDAO.java

public class CarroDAO {
    //conexao...
    public ArrayList<MeuManagedBean> metodoDAO() {
        ResultSet rs //...
        ArrayList<MeuManagedBean> carros = new ArrayList<MeuManagedBean>();
        while (rs.next()) {
            MeuManagedBean carro = new MeuManagedBean();
            carro.setCodigo(rs.getInt("cdCarro"));
            carro.setModelo(rs.getString("nmModelo"));
            carros.add(carro);
        }
    }
    //...
    return carros;
}

When I access the page, nothing appears in p:selectOneMenu . What do I have to fix to make it work?

---

I noticed a very strange behavior. Every time I try to add a method that is called immediately on the page (ie with a PostConstruct annotation or in the constructor itself) it doesn't work.

When I put a "MyManagedBean" object inside the cars ArrayList manually (by constructor using carros.add(MeuManagedBean) ), it appears in p:selectOneMenu .

Answer:

MyManagedBean.java

@ManagedBean(name="meuManagedBean") 

@RequestScoped 
public class MeuManagedBean {

//code...
public List< MeuManagedBean > getCarros(){

       return new CarroDAO().metodoDAO();
}

page.xhtml

<f:selectItems value="#{menuManagedBean.carros}".../>

Notice the name you refer to the Bean in this menu and not mine.

Tip: Rename the methods according to their function, change medotoDAO to getCarros or listarCarros .