Site doesn't reload after button click - ajax

Question

I developed a view to save Child-objects. Everything works fine but to see my additional objects in the <p:dataTable> I always have to reload the site manually.
Below the code for the <p:commandButton> which sends the form-data to my controller class.
<h:panelGrid columns="3">
<p:commandButton value="Save"
action="#{childController.doSaveChild}"
oncomplete="PF('childAddDialog').hide()"
update=":childForm"/>
</h:panelGrid>
I already tried to use ajax="false", but it doesn't work.
What can I do to get the site reloaded after click on save-button?
UPDATE:
<p:dataTable> from my view.xhtml:
<h:form id="childForm">
<p:dataTable id="childTable" var="child"
widgetVar="childTable" value="#{childController.children}"
paginator="true" rows="10" paginatorPosition="bottom"
paginatorTemplate="{CurrentPageReport} {FirstPageLink} {PreviousPageLink}
{PageLinks} {NextPageLink} {LastPageLink} {RowsPerPageDropdown}
{Exporters}"
rowsPerPageTemplate="10,25,50">
<p:column headerText="Firstname"
filterBy="#{child.firstName}"
sortBy="#{child.firstName}" filterStyle="display:none">
<h:outputText value="#{child.firstName}"/>
</p:column>
<p:column headerText="Lastname"
filterBy="#{child.lastName}"
sortBy="#{child.lastName}"
filterStyle="display:none">
<h:outputText value="#{child.lastName}"/>
</p:column>
<p:column headerText="Birthday"
filterBy="#{child.birthday}"
sortBy="#{child.birthday}"
filterStyle="display:none">
<h:outputText value="#{child.birthday}"/>
</p:column>
</dataTable>
</form>
Here the methods for providing the children for the view:
public Collection<Child> getChildren(){
return children;
}
#PostConstruct
public void initList(){
setChildren(childService.getAllChildren());
}

Answer 1

The xhtml-code from above is fine.
To get the site auto-updated it is necessary to load the list with all children again after the save-method in controller.
public void doSaveChild(){
childService.saveChild(child);
child = null;
initNewChild();
initList(); //this is needed to get up-to-date list in view
}

Answer 2

You could either do it via javascript:
<p:commandButton value="Save"
action="#{childController.doSaveChild}" process="#form" update="#none" oncomplete="location.reload();"/>
or a return String in your action method:
public String doSaveChild(){
//your logic
return "/yourpage?faces-redirect=true"}