How to clear all input fields in p:dataTable? - jsf-2

Question

I am using JSF 2.0 with PrimeFaces. I have a <p:dataTable>. I have a <p:inputText> in a column. I can edit and save it. I have also a reset button, but it is not working.
<h:form id="f">
<f:facet name="head">Enteri Karbon Hesaplaması</f:facet>
<p:dataTable value="#{orderBean.orderList}" var="o" id="bir">
<p:column>
<f:facet name="header">Hayvan Adi</f:facet>
<h:outputText value="#{o.hayvanadi}"/>
</p:column>
<p:column>
<f:facet name="header">Karbon Salinimi Değeri</f:facet>
<h:outputText value="#{o.karbonsalinimi}"/>
</p:column>
<p:column>
<f:facet name="header">Adet</f:facet>
<p:inputText id="spinner" maxlength="12" value="#{o.adet}"/>
</p:column>
</p:dataTable>
<p:commandButton value="Kaydet" action="#{orderBean.saveAction()}" update="bir"/>
<p:commandButton value="Temizle" update="bir" process="#this" actionListener="#{orderBean.reset}"/>
</h:form>
Here is the relevant part of my backing bean:
#ManagedBean
#SessionScoped
public class OrderBean {
private static final ArrayList<Order> orderList =
new ArrayList<Order>(Arrays.asList(
new Order("Süt İneği", 99 , 0),
new Order("Diğer İnekler", 58, 0),
new Order("Koyun",5, 0),
new Order("Keçi",5, 0),
new Order("At ",18, 0),
new Order("Eşek ",10, 0)
)
);
public String saveAction() {
for (Order order : orderList){
order.setEditable(false);
}
return null;
}
public String editAction(Order order) {
order.setEditable(true);
return null;
}
public void reset() {
RequestContext.getCurrentInstance().reset("form:f");
}
// ...
}

Answer 1

Change the type of your command button to reset ie:
<p:commandButton type="reset" value="Temizle" update="bir" process="#this" actionListener="#{orderBean.reset}"/>
Also, since you are basically trying to make the datatable empty again you can just set orderList to an empty list in the reset function.

Answer 2

You can reset a form using <p:commandButton type="reset" or <p:commandButton update="#form". The latter is also used in p:inplace.
Edit: The reason your button isn't working is because the id referred in its update attribute isn't correct. It should be :formId:dataTableId. The #form is easier though.