Editing rows in p:dataTable - jsf

Question

I try to update a datatable row with PrimeFaces 3.1.1 but it makes all values null.
public void onRowEdit(RowEditEvent event) {
Client us= (Client) event.getObject();
System.out.println("event edit"+us);
clientService.editClient( us );
FacesMessage msg = new FacesMessage("Client modifié", ((Client) event.getObject()).getName_customer());
FacesContext.getCurrentInstance().addMessage(null, msg);
}
This is my page xhtml:
<h:form>
<p:dataTable var="client" value="#{clientBean.clients}" widgetVar="clientTable" emptyMessage="No customers found with given criteria" filteredValue="#{clientBean.filteredClients}" paginator="true" rows="10" rowsPerPageTemplate="5,10,15" editable="true" id="testContainer">
<p:ajax event="rowEdit" update="#this" listener="#{clientBean.onRowEdit(event)}" />
<f:facet name="header"><p:outputPanel><h:outputText value="Recherche d'un client:" /> </p:outputPanel>
</f:facet>
<p:column filterBy="#{client.user.username}" headerText="Collaborateur" filterMatchMode="contains">
<h:outputText value="#{client.user.username}" />
</p:column>
<p:column filterBy="#{client.name_customer}" headerText="Nom" filterMatchMode="contains">
<f:facet name="output">
<h:link outcome="CustomerDetails?faces-redirect=true&includeViewParams=true" value="#{client.name_customer}" >
<f:param name="idCustomer" value="#{client.costumer_id}"></f:param>
<f:param name="nameCustomer" value="#{client.name_customer}"></f:param>
</h:link> </f:facet>
<f:facet name="input"><p:inputText value="#{client.name_customer}"/></f:facet>
</p:cellEditor>
</p:column>
<p:column filterBy="#{client.statut}" headerText="Statut" filterMatchMode="contains">

Answer 1

the problem is that your object Client us is null , try to display a property from your object us if is null so that will confirm that you don't get your object from your page correctly . So i suggest you to replace that :
<p:ajax event="rowEdit" update="#this" listener="#{clientBean.onRowEdit}" />
with that
<p:ajax event="rowEdit" update="#this" listener="#{clientBean.onRowEdit(event)}" />
Note that i just added the event property to onRowEdit.