Primefaces <p:cellEditor> editing (more) cells - jsf

Question

In primefaces I have a database with OneToMany relation. I have already made add(Create), search(Read) and Delete, now I want to also make edit(Update) operation.
For that I use primefaces example on primefaces
I pass parameter idPest(identifier) to next page with
<f:param name="idofpest" value="#{zuzek.idPest}" /> and on next page I have
<f:metadata>
<f:viewParam name="idofpest" value="#{smPestsList.idPest}" />
<f:viewAction action="#{smPestsList.init}" />
</f:metadata>
<p:dataTable var="ime" value="#{smPestsList.imena}" editable="true" editMode="cell">
<p:ajax event="cellEdit" listener="#{smPestsList.onCellEdit}" update=":pestsListEdit:msgs"/>
<p:column headerText="ID PEST NAME">
<p:cellEditor>
<f:facet name="output"><h:outputText value="#{ime.idPestName}" /></f:facet>
<f:facet name="input"><p:inputText id="modelInput" value="#{ime.idPestName}" style="width:100%"/></f:facet>
</p:cellEditor>
</p:column>
<p:column headerText="LANGUAGE">
<h:outputText value="Français"
rendered="#{ime.idLanguage eq 13}" />
<h:outputText value="Italiano"
rendered="#{ime.idLanguage eq 8}" />
<h:outputText value="English"
rendered="#{ime.idLanguage eq 4}" />
<h:outputText value="Español"
rendered="#{ime.idLanguage eq 9}" />
<h:outputText value="Deutsch"
rendered="#{ime.idLanguage eq 11}" />
<h:outputText value="Magyar"
rendered="#{ime.idLanguage eq 10}" />
</p:column>
<p:column headerText="DISPLAY NAME">
<p:cellEditor>
<f:facet name="output">
<h:outputText value="#{ime.name}"/>
</f:facet>
<f:facet name="input">
<p:inputText value="#{ime.getName()}" style="width:100%"/>
</f:facet>
</p:cellEditor>
</p:column>
</p:dataTable>
with bean onCellEdit
public void onCellEdit(CellEditEvent event) {
System.out.println(" idpest: " +idPest); // to see if passing parameter(id) is still in memory
Object oldValue = event.getOldValue();
Object newValue = event.getNewValue();
if(newValue != null && !newValue.equals(oldValue)) {
FacesMessage msg = new FacesMessage(FacesMessage.SEVERITY_INFO, "Cell Changed", "Old: " + oldValue + ", New:" + newValue);
FacesContext.getCurrentInstance().addMessage(null, msg);
System.out.println("Cellchange");
}
}
Now I have two problems:
After editing cell backing bean doesn't print "Cellchange" and also after editing if the cell has changed it seems empty until I click on it again
IF I want to edit more than one cell parameter isn't in memory anymore. Now I don't know if cellEditor can update parameters after each edit or should I add Save button with update bean like
public SmPests update(SmPests pest) {
em.getTransaction().begin();
pest = em.merge(pest);
em.getTransaction().commit();
return pest;
}
This is my first working with databases, so if I ask something stupid, please bear with me.
I am using Eclipse, postgresql, Wildfly17 and primefaces 7.0.
bean is in #RequestScoped I tried with other scopes, but I get the
WELD-000072: Bean declaring a passivating scope must be passivation capable. error