Update a row in p:dataTable - jsf

Question

I'm working with JSF and primefaces. I want to update a row when I click on the button (pencil). I used the first code from this tutorial (Primefaces docs), but dosent work in my case.
the problem is : when i click the button (pencil) to update a row, nothing change. i have always the old values
This is my JSF code :
<f:view>
<h:form id="form">
<p:growl id="msgs" showDetail="true"/>
<p:dataTable id="tservice" var="item" value="#{serviceMBean.services}" editable="true" style="margin-bottom:20px">
<f:facet name="header"> edit </f:facet>
<p:ajax event="rowEdit" listener="#{serviceMBean.onRowEdit}" update=":form:msgs" />
<p:ajax event="rowEditCancel" listener="#{serviceMBean.onRowCancel}" update=":form:msgs" />
<p:column headerText="Libelle du service">
<p:cellEditor>
<f:facet name="output"><h:outputText value="#{item.libelleservice}" /></f:facet>
<f:facet name="input">
<p:inputText value="#{item.libelleservice}" style="width:100%" label="Libelle"/>
</f:facet>
</p:cellEditor>
</p:column>
<p:column headerText="Utilisateurs/Service">
<p:cellEditor>
<f:facet name="output"><h:outputText value="#{item.nbruserservice}" /></f:facet>
<f:facet name="input">
<p:inputText value="#{item.nbruserservice}" style="width:100%" label="Nbre Users"/>
</f:facet>
</p:cellEditor>
</p:column>
<p:column style="width:32px">
<p:rowEditor />
</p:column>
And this is my managed bean code:
#Named(value = "serviceMBean")
#ViewScoped
public class ServiceMBean implements Serializable {
private List<Service> serviceList;
private Service s;
#EJB
private ServiceManager serviceManager;
public ServiceMBean() {}
public void modifierService(Service s1) {
this.serviceManager.updateService(s1);
}
public void onRowEdit(RowEditEvent event) {
Service s2 = (Service) event.getObject();
System.out.println("--->" + s2.getNbruserservice());
FacesMessage msg = new FacesMessage("Service Modifié", ((Service) event.getObject()).getLibelleservice());
this.modifierService(s2);
FacesContext.getCurrentInstance().addMessage(null, msg);
}
public void onRowCancel(RowEditEvent event) {
FacesMessage msg = new FacesMessage("Modification annulée", ((Service) event.getObject()).getLibelleservice());
FacesContext.getCurrentInstance().addMessage(null, msg);
}
}
And this is my code for ServiceManager:
public void updateService(Object service) {
em.merge(service);
}
I think the setter in my JSF page doesn't work. Any solutions or suggestions?

Answer 1

Solution : Add a void method with #PostConstruct.
Example : #PostConstruct
#PostConstruct
public void initialiser() {
serviceList = this.getServices();
}
Don't forget the getter and setter of serviceList
In the JSF page, the value of datatable will be : value="#{ServiceMBean.serviceList}"