Primefaces 6.2 TabView onTabChange Form data is Null - jsf

Question

I am not sure if I am making a silly mistake, but this has not been working for me on a very simple case: In my tabview / tabs when I switch from one tab to other I want to save the data that's entered in the form. The Submit button works fine on each tab, but the tabchange event shows all my form data to be null. I have tried process with #all, #form, #this, nothing seems to work. Same with update option.
Here's the XHTML:
<h:form id="form">
<p:growl id="msgs" showDetail="true" keepAlive="5000" />
<p:tabView id="tView" dynamic="true" cache="false" >
<p:ajax event="tabChange" listener="#{deleteMe.onTabChange}" update=":form:msgs" />
<p:tab title="MyTitle I" id="tab1">
<p:fieldset legend="Personal Information" toggleable="false" >
<h:panelGrid columns="2" cellpadding="10">
Value 1: <p:inputText value="#{deleteMe.thingOne}"></p:inputText>
Value 2: <p:inputText value="#{deleteMe.thingTwo}"></p:inputText>
<p:commandButton value="Submit" id="ajax" update=":form:msgs" action="#{deleteMe.onSubmit}" />
</h:panelGrid>
</p:fieldset>
</p:tab>
<p:tab title="MyTitle II" id="tab2">
<p:fieldset legend="Social Information" toggleable="false">
<h:panelGrid columns="2" cellpadding="10">
<p:inputText value="#{deleteMe.thingThree}"></p:inputText>
<p:commandButton value="Submit" id="ajax2" update=":form:msgs" action="#{deleteMe.onSubmit}" />
</h:panelGrid>
</p:fieldset>
</p:tab>
</p:tabView>
</h:form>
And here's my backing bean:
`
import javax.annotation.PostConstruct;
import javax.inject.Named;
import org.primefaces.event.TabChangeEvent;
import org.springframework.context.annotation.Scope;
#Named(value = "deleteMe")
#Scope("view")
public class DeleteBean implements Serializable {
private static final long serialVersionUID = 47L;
private String thingOne;
private String thingTwo;
private String thingThree;
#PostConstruct
public void initialize() {
}
public void onTabChange(TabChangeEvent event) {
System.out.println("Saving draft, current index: "+ event.getTab().getTitle());
System.out.println(thingOne);
System.out.println(thingTwo);
saveDraft();
}
public void onSubmit() {
System.out.println(thingOne);
System.out.println(thingTwo);
System.out.println(thingThree);
saveDraft();
}
public void saveDraft() {
System.out.println("This is thing 1 value: "+thingOne);
System.out.println("This is thing 2 value: "+thingTwo);
System.out.println("This is thing 2 value: "+thingThree);
}
public String getThingOne() {
return thingOne;
}
public void setThingOne(String thingOne) {
this.thingOne = thingOne;
}
public String getThingTwo() {
return thingTwo;
}
public void setThingTwo(String thingTwo) {
this.thingTwo = thingTwo;
}
public String getThingThree() {
return thingThree;
}
public void setThingThree(String thingThree) {
this.thingThree = thingThree;
}
}
`
On tabchange event, it triggers the method, but the values are all null.
SystemOut O This is thing 1 value: null
SystemOut O This is thing 2 value: null
SystemOut O This is thing 2 value: null
Can you please point out if I am making some silly mistake? Thank you.

Answer 1

The correct answer is to use skipChildren="false" on your p:ajax commands.
https://github.com/primefaces/primefaces/issues/2525
<p:ajax event="tabChange"
skipChildren="false"
listener="#{deleteMe.onTabChange}"
update=":form:msgs" />

Answer 2

I have the same problem.
On changing the tab without submitting, data will be lost because of not updating the input text field. You can add ajax for Input text field.
<p:inputText id="thingOneId" value="#{deleteMe.thingOne}">
<p:ajax update="thingOneId"/>
</p:inputText>
skipchildren="true"
works for not loosing the data, but it won't update the value from inputfields.

Answer 3

Saw a workaround for it but I am not sure why it is working this way:
I had to add the remote command with a tabchange listener on tabView.
<p:remoteCommand name="onTabChangeProcess" process="tView, #this"/>
<p:tabView activeIndex="#{deleteMe.activeIndex}" id="tView" onTabChange="onTabChangeProcess()">
<p:ajax event="tabChange" listener="#{deleteMe.onTabChange}" update="tView" process="tView"/>
This made the form to work as expected.