Initialise List based on a JPA query? - jsf

Question

Good afternoon. I have a list of operators which I initialize as follows.
#ManagedBean
#ViewScoped
public class TiemposBean implements Serializable {
#EJB
private OperariosFacade operariosFacade;
private List<Operarios> operariosList;
#PostConstruct
public void inicializarBean() {
operariosList = operariosFacade.findAll();
}
public List<Operarios> getOperariosList() {
return operariosList;
}
public void setOperariosList(List<Operarios> operariosList) {
this.operariosList = operariosList;
}
}
The list is initialized normally and I use it without any problem but I want to initialize it based on the following database query.
SELECT * FROM `operarios` WHERE `ESTADO_OPERARIO` = 1 AND `TIPO_ESTADO_OPERARIO` = 1;
In my JPQL query is as follows.
#NamedQuery(name = "Operarios.findByNombreLista", query = "SELECT o FROM Operarios o WHERE o.idEstadoOperario = :idEstadoOperario AND o.tipoEstadoOperario = :tipoEstadoOperario"),
And the method I built to invoke that query is as follows.
public void inicializarLista() {
String namedQuery = "Operarios.findByNombreLista";
Map<String, Object> parametros = new HashMap<>();
parametros.put("idEstadoOperario", 1);
parametros.put("tipoEstadoOperario", 1);
operariosList = operariosFacade.findByNamedQuery(namedQuery, parametros);
}
and there's modified my bean.
#ManagedBean
#ViewScoped
public class TiemposBean implements Serializable {
#EJB
private OperariosFacade operariosFacade;
private List<Operarios> operariosList;
#PostConstruct
public void inicializarBean() {
operariosList = new ArrayList<>();
}
public List<Operarios> getOperariosList() {
return operariosList;
}
public void setOperariosList(List<Operarios> operariosList) {
this.operariosList = operariosList;
}
}
and in my view I call it as follows
<p:outputLabel for="somOperario" value="Operario"/>
<p:selectOneMenu id="somOperario" value="#{tiemposBean.operarioSeleccionado}"
filter="true"
converter="operariosConverter">
<f:selectItem itemLabel="Seleccione uno"/>
<f:selectItems value="#{tiemposBean.operariosList}"
var="operarioVar"
itemValue="#{operarioVar}"
itemLabel="#{operarioVar.nombre}"
/>
</p:selectOneMenu>
<p:message for="somOperario" id="msg_somOperario"/>
But I don't initialize it to me that I am doing wrong please I need your help. thanks

Answer 1

Based on the code that you posted, the "inicializarLista" method is not called. You have a managed bean with:
#PostConstruct
public void inicializarBean() {
operariosList = new ArrayList<>();
}
But you are loading your list in:
public void inicializarLista()
Please, call the inicializarLista() inside #PostConstruct method:
#PostConstruct
public void inicializarBean() {
//This step is not necessary any more!
operariosList = new ArrayList<>();
inicializarLista();
}