In Primefaces, a button will call a prepareCreate method and then open the form dialog. The issue is, this method never get called so that the form in the dialog is not shown.
Command button
<p:commandButton id="createButton1" value="#{bundle.Create}" actionListener="#{purchaseOrderController.prepareCreate}"
update=":PurchaseOrderCreateForm11" oncomplete="PF('PurchaseOrderCreateDialog11').show()"/>
Dialog
<p:dialog id="PurchaseOrderCreateDlg11" widgetVar="PurchaseOrderCreateDialog11" modal="true" resizable="false" appendTo="@(body)" header="#{bundle.CreatePurchaseOrderTitle}">
<h:form id="PurchaseOrderCreateForm11">
<h:panelGroup id="display">
<p:panelGrid columns="2" rendered="#{purchaseOrderController.selected != null}">
<p:outputLabel value="#{bundle.CreatePurchaseOrderLabel_orderNum}" for="orderNum" />
<p:inputText id="orderNum" value="#{purchaseOrderController.selected.orderNum}" title="#{bundle.CreatePurchaseOrderTitle_orderNum}" required="true" requiredMessage="#{bundle.CreatePurchaseOrderRequiredMessage_orderNum}"/>
<p:outputLabel value="#{bundle.CreatePurchaseOrderLabel_quantity}" for="quantity" />
<p:inputText id="quantity" value="#{purchaseOrderController.selected.quantity}" title="#{bundle.CreatePurchaseOrderTitle_quantity}" />
<p:outputLabel value="#{bundle.CreatePurchaseOrderLabel_shippingCost}" for="shippingCost" />
<p:inputText id="shippingCost" value="#{purchaseOrderController.selected.shippingCost}" title="#{bundle.CreatePurchaseOrderTitle_shippingCost}" />
</p:panelGrid>
<p:commandButton actionListener="#{purchaseOrderController.create}" value="#{bundle.Save}" oncomplete="handleSubmit(args,'PurchaseOrderCreateDialog11');"/>
<p:commandButton value="#{bundle.Cancel}" onclick="PurchaseOrderCreateDialog11.hide()"/>
</h:panelGroup>
</h:form>
</p:dialog>
JSF managed bean
@Named("purchaseOrderController")
@SessionScoped
public class PurchaseOrderController implements Serializable {
public PurchaseOrder prepareCreate() {
System.out.println("Purchase order prepare create");
selected = new PurchaseOrder();
initializeEmbeddableKey();
return selected;
}
}