Primefaces JSF RowEditCancel event duplicates a row deleted from a datatabale - jsf

Question

I have two primefaces datatable A and B, the goal is to add an item from A to B, so I have two ArrayList for each datatable.
Each datatable has <p:ajax event="rowEditCancel" listener="#{item.onCancel}" update=":datatableA :datatableB" />
the listener is fired and the object is deleted in the datatable A and added to the datatable B but the item that remains in the datatable A is duplicated, but when I clicked in that item it throws a NoRowAvailableException
Here is the form
<h:form id="formulario">
<p:accordionPanel id="ap1">
<p:tab title="Examen">
<h:panelGrid columns="2" cellpadding="10">
</h:panelGrid>
</p:tab>
<p:tab title="Preguntas disponibles" id="tb2">
<h:panelGroup id="pg2">
<p:dataTable id="dtDisponibles" value="#{examenPregunta.itemsDisponibles}" var="pregunta"
rows="10" paginator="true"
editable="true"
paginatorTemplate="{CurrentPageReport} {FirstPageLink} {PreviousPageLink} {PageLinks} {NextPageLink} {LastPageLink} {RowsPerPageDropdown}"
rowsPerPageTemplate="5,10,15" lazy="true" >
<f:facet name="header">
<h:outputText value="Preguntas disponibles"/>
</f:facet>
<!--" <p:ajax event="rowEditCancel" listener="#{examenPregunta.agregarItem}" update="#form" />-->
<p:ajax event="rowEditCancel" listener="#{examenPregunta.agregarItem}" update=":formulario:ap1:dtSeleccionados :formulario:ap1:dtDisponibles />
<p:column headerText="Clave" >
<h:outputText value="#{pregunta.identificador}"/>
</p:column>
<p:column headerText="Enunciado">
<h:outputText escape="false" value="#{pregunta.enunciado}"/>
</p:column>
<p:column>
<p:rowEditor />
</p:column>
</p:dataTable>
</h:panelGroup>
</p:tab>
<p:tab title="Preguntas seleccionadas" id="tab3">
<h:panelGroup id="pg3">
<p:dataTable id="dtSeleccionados" value="#{examenPregunta.itemsSeleccionados}"
editable="true"
var="pregunta" rows="10" paginator="true"
paginatorTemplate="{CurrentPageReport} {FirstPageLink} {PreviousPageLink} {PageLinks} {NextPageLink} {LastPageLink} {RowsPerPageDropdown}"
rowsPerPageTemplate="5,10,15" lazy="true" >
<f:facet name="header">
<h:outputText value="Preguntas seleccionadas"/>
</f:facet>
<!--<p:ajax event="rowEditCancel" listener="#{examenPregunta.quitarItem}" update="#form" /> -->
<p:ajax event="rowEditCancel" listener="#{examenPregunta.quitarItem}" update=":formulario:ap1:dtDisponibles :formulario:ap1:dtSeleccionados" />
<p:column headerText="Clave" >
<h:outputText value="#{pregunta.identificador}"/>
</p:column>
<p:column headerText="Enunciado">
<h:outputText escape="false" value="#{pregunta.enunciado}"/>
</p:column>
<p:column>
<p:rowEditor />
</p:column>
</p:dataTable>
</h:panelGroup>
</p:tab>
</p:accordionPanel>
</h:form>
and here is the managed bean
#ManagedBean
#SessionScoped
public class ExamenPregunta implements Serializable {
private static final long serialVersionUID = 1L;
private Date currentDate = new Date();
private String idExamen = "";
private ITOAssessmentTest examen = null;
ITOAssessmentItem pregunta = new ITOAssessmentItem();
ITOAssessmentItem[] arrPregunta = null;
private ArrayList<ITOAssessmentItem> itemsDisponibles = new ArrayList<ITOAssessmentItem>();
private ArrayList<ITOAssessmentItem> itemsSeleccionados = new ArrayList<ITOAssessmentItem>();
public void agregarItem(RowEditEvent event){
System.out.println("agregarItem");
itemsDisponibles.remove((ITOAssessmentItem) event.getObject());
itemsSeleccionados.add((ITOAssessmentItem) event.getObject());
}
public void quitarItem(RowEditEvent event){
System.out.println("quitarItem");
itemsDisponibles.add((ITOAssessmentItem) event.getObject());
itemsSeleccionados.remove((ITOAssessmentItem) event.getObject());
}
/**
* #return the itemsDisponibles
*/
public ArrayList<ITOAssessmentItem> getItemsDisponibles() {
return itemsDisponibles;
}
/**
* #return the itemsSeleccionados
*/
public ArrayList<ITOAssessmentItem> getItemsSeleccionados() {
return itemsSeleccionados;
}
}
Thanks in advance!!!

Answer 1

you code looks ok.
maybe its an bug for this combination accordionPanel->datatable->ajax->rowEdit.
with
<p:column>
<p:commandButton value="foo" action="#{examenPregunta.doAction(pregunta)}"
process="#this"
update=":formulario:dtDisponibles :formulario:dtSeleccionados"></p:commandButton>
</p:column>
its work for me.
why did u have a lazy="true"?