Primefaces 6.2 onCellEdit - getNewValue() nn is receiving the new value

Question

I’m doing a project with Primefaces and on a screen I use a Datatable with cellEdit and I followed the example of the right showcase and tals however the getNewValue and the getOldValue are coming up null and this is breaking my application, following the code:

Method onCellEdit:

public void onCellEdit(CellEditEvent event) {
    Object valorAntigo = event.getOldValue();
    Object valorNovo = event.getNewValue();

    if (valorNovo != null && !valorNovo.equals(valorAntigo)) { //ele nao esta entrando neste IF pq os valores estão nulos
        if (editEmItemSelecionado(Long.parseLong(event.getRowKey())) && !existeItemNaLista(Long.parseLong(event.getRowKey()))) {
            Item item = new Item();
            item.setIdItem(Long.parseLong(event.getRowKey()));
            item.setQuantidade((Short)valorNovo);
            quantidades.add(item);
        }
    }
}

Canvas:

<p:dataTable id="lista" value="#{itemController.getDataModelCliente(p.idCategoria)}" var="i" selection="#{itemController.itensSelecionados}" editable="true" editMode="cell">
                <p:ajax event="cellEdit" update="lista" process="@this" partialSubmit="true" listener="#{itemController.onCellEdit}"/>

                <p:column selectionMode="multiple" style="text-align: center">
                </p:column>

                <p:column headerText="Item">
                    <h:outputText value="#{i.nomeItem}"/>
                    <br/>
                    <h:outputText value="#{i.descricao}" rendered="#{i.descricao != null}"/>
                    <h:outputText value="N/A" rendered="#{i.descricao.equalsIgnoreCase(null)}"/>
                    <br/>
                    <h:outputText value="N/A" rendered="#{i.tempoPreparo == 0}"/>
                    <h:outputText value="#{i.tempoPreparo} Minutos" rendered="#{i.tempoPreparo != 0}"/>
                </p:column>

                <p:column headerText="Preço">
                    <h:outputText value="R$ #{i.preco}" rendered="#{i.categoria.idCategoria.equals(p.idCategoria)}"/>
                </p:column>

                <p:column headerText="Quantidade">
                    <p:cellEditor>
                        <f:facet name="output"> <h:outputText value="#{i.quantidade}"/> </f:facet>
                        <f:facet name="input"> <p:spinner value="#{i.quantidade}" min="1"/> </f:facet>
                    </p:cellEditor>
                </p:column>
            </p:dataTable>

Looking on the internet I realized that there are more people with this same problem that I or similar but nn found an answer yet, at least not found one that works for me, someone can help me?

Edit 1:

Perrcebi what is happening is that he nn ta sending the new value and so he was coming null because the old value was null, but still nn solved the problem, I nn can receive the new value, someone knows why?

Answer 1

I found my mistake, the mistake is on the line <p:dataTable id="lista" value="#{itemController.getDataModelCliente(p.idCategoria)}"... I’m only using the meto get of my Datamodel object. The good part is that I found the error, the bad part is that my logic went to the bag because I was doing (I know that Datatable is already dynamic) a "more dynamic" Datatable, it is kind of difficult to explain but only you read the code maybe you will understand what I mean, I’ll have to think of another logic here, flw!