JSF page only loads data when backing bean is on session scoped - spring

Question

This is my admin_order_search.xhtml page and it has a <p:dataTable>
and I'm trying to call a admin_view_order.xhtml page with the particulate
order object
<p:column>
<f:facet name="header">
<h:outputText value="View" />
</f:facet>
<p:commandButton action="admin_view_order?faces-redirect=true" id="view" value="View Info" update="dataTable" actionListener="#{viewOrderController.loadOrder(order)}" />
</p:column>
and this is my "admin_view_order.xhtml"
<h:form id="orderViewForm">
<p:growl id="growl" showDetail="true" autoUpdate="true" sticky="false" />
<p:outputLabel value="#{viewOrderController.order.orderId}"></p:outputLabel>
<p:outputLabel value="#{viewOrderController.order.customerName}"> </p:outputLabel>
</h:form>
and hear is my "ViewOrderController.java" page
#Component
#ManagedBean
#ViewScoped
public class ViewOrderController implements Serializable{
private static final long serialVersionUID = 1L;
private Order order;
public void loadOrder(Order order){
System.out.println("ID : "+order.getOrderId());
System.out.println("Name : "+order.getCustomerName());
this.order = order;
}
public Order getOrder() {
return order;
}
public void setOrder(Order order) {
this.order = order;
}
}
the problem is admin_view_order.xhtml shows the order details, only if my ViewOrderController is on #SessionScoped but I want it to be on ViewScoped
Please let me knows how to do that?

Answer 1

Why do you want the Controller to be ViewScoped?
After leaving the view (navigate to admin_view_order.xhtml) a new instance of your controller is used. So the changes you made before (setting the order in loadOrder) are gone.

Answer 2

There is another way to do that , is to passing parameter through the GET request ( for example you can pass the id of the order object in admin_order_search.xhtml to , and then recover this id and use it in your backing bean by searching the object with this id ).
This is possible by using view parameters
1-pass the id of the object (add the folowing tag inside your button )
<f:param name="id" value="#{viewOrderController.order.orderId}" />
2-After that, in your admin_view_order.xhtml page, catch the view param and load the info for that order:
<f:metadata>
<f:viewParam name="id" value="#{viewOrderController.newOrderId}" />
<f:event type="preRenderView" listener="#{viewOrderController.loadOrder}"/>
</f:metadata>
note that i added an attribut ( newOrderId ) to put the order.orderId into it