As I'm new to JSF framework, wanted to know how to add the user entered data to the database.
More clearly, i'm using jsf with jsp, my jsp contains some input fields and a submit button.How do i capture all the user entered data and send it as input paramters for the button, as my back end takes all these as input parameters and updates the table with a new record.
Please look into my code and lety me know my mistake
Registration.jsp
<body>
<f:view>
<h:form>
<h:panelGrid columns="2" rules="all" width="100%" style="background:#03547C;color:#FDD017">
<h:column>
<h:outputText value="Stu No : "></h:outputText>
<h:inputText value="#{RegBean.stuNo}"/>
</h:column>
<h:column>
<h:outputText value="Stu Name : "></h:outputText>
<h:inputText value="#{RegBean.stuName}"/>
</h:column>
<h:column>
<h:outputText value="Standard : "></h:outputText>
<h:inputText value="#{RegBean.standard}" />
</h:column>
<h:column>
<h:outputText value="School : "></h:outputText>
<h:inputText value="#{RegBean.school}" />
</h:column>
</h:panelGrid>
<h:panelGrid columns="2" rules="all" width="100%" style="background:#03547C;color:#FDD017">
<h:column>
<h:form>
<h:commandButton id="submitBtn" value="Submit" action="#{RegBean.submitDetails}">
<f:param name="sNo" value="#{RegBean.stuNo}" />
<f:param name="sName" value="#{RegBean.stuName}" />
<f:param name="std" value="#{RegBean.standard}" />
<f:param name="schl" value="#{RegBean.school}" />
</h:commandButton>
</h:form>
</h:column>
</h:panelGrid>
</h:form>
</f:view>
</body>
Registration Bean
public class VendorRegBean {
private String stuNo;
private String stuName;
private String standard;
private String school;
// getters and setters
public void submitDetails() {
Map requestMap = context.getExternalContext().getRequestParameterMap();
String stNo = (String) requestMap.get("sNo");
String stName = (String) requestMap.get("sName");
String stndrd = (String) requestMap.get("std");
String scl = (String) requestMap.get("schl");
vReg.stuRegistration(stNo ,stName ,stndrd ,scl );
}
}
You don't need to get the parameters from the request parameter map as long as you register your bean as managed bean and provide getter and setter methodes for your bean members.
Use annotations for your bean to declare it as managed bean. Getter and setter example are given for stuNo member:
import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;
#ManagedBean
#SessionScoped
public class RegBean {
private String stuNo;
...
private String getStuNo() {
return stuNo;
}
private String setStuNo(String stuNo) {
this.stuNod = stuNo;
}
}
In the view you have to reference the managed bean with first letter lower case, such as:
<h:inputText value="#{regBean.stuNo}"/>
Your command button doesn't need <f:param>, simply use:
<h:commandButton id="submitBtn" value="Submit" action="#{regBean.submitDetails}"/>
Then all parameters are automatically available in your submitDetails method and you don't need to get them from the parameter map.
Related
I have a simple input form that accepts data from the user and stores the data in DB upon a click action for a p:commandButton
the form looks like this
form.xhtml :
<div align="center" style="width: 80%">
<p:panelGrid columns="1">
<p:accordionPanel>
<p:tab title="#{msg['truck.tab.general']}">
<h:form><h:panelGrid columns="3">
<p:outputLabel value="*#{msg['truck.form.code']}"></p:outputLabel>
<p:inputText id="inputTruckCode" required="true"
requiredMessage="Must exist"
value="#{trucksBean.currentTruck.code}"></p:inputText>
<p:message for="inputTruckCode" showSummary="true"></p:message>
<!-- rest of the form -->
</h:form>
</p:tab>
</p:accordionPanel>
<p:commandButton action="#{trucksBean.insertTruck}"
value="Insert Truck"></p:commandButton>
</p:panelGrid>
</div>
the backing bean code:
#ManagedBean
#ViewScoped
public class TrucksBean {
private TruckFullInformation currentTruck;
public String insertTruck() {
//the values inside currentTruck member variable are NULLs
return null;
}
what's wrong with the code? why clicking on the commandButton doesn't affect/update the values of the "currentTruck" variable?
thanks in advance;
I have some code is similar to the following showcase:
http://www.primefaces.org/showcase/ui/data/datatable/filter.xhtml
The filter is applied correctly in the backing bean, although the datatable hasn't been refreshed with the new filtered rows. It remains as it is before applying the filter. Is there something missing or wrong in this showcase?
<h:form>
<p:dataTable var="serviceEntity" value="#{serviceSearchMB.allServices}" widgetVar="serviceSearchTable"
emptyMessage="No services found with given criteria" filteredValue="#{serviceSearchMB.filteredServices}">
<f:facet name="header">
<h:outputText value="Search all fields:" />
<p:inputText id="globalFilter" onkeyup="PF('serviceSearchTable').filter();"
style="width:150px" placeholder="Enter keyword" />
</f:facet>
<p:column filterBy="#{serviceEntity.serviceName}" headerText="Service Name" filterMatchMode="contains" >
<h:outputText value="#{serviceEntity.serviceName}" />
</p:column>
...
Backing Bean:
#ManagedBean(name="serviceSearchMB")
#RequestScoped
public class ServiceSearchManagedBean implements Serializable {
private List<ServiceSearchEntity> filteredServices;
public List<ServiceSearchEntity> getFilteredServices() {
return filteredServices;
}
public void setFilteredServices(List<ServiceSearchEntity> filteredServices) {
this.filteredServices = filteredServices; // Already set the filtered list correctly.
}
public List<ServiceSearchEntity> getAllServices() {
//already returns all services.
}
...
I have this code :
Add.xhtml :
<h:form id="nouv">
<h:panelGrid columns="2">
<h:outputText value="Nom:"></h:outputText>
<p:inputText value="#{ddeBean.nom}"></p:inputText>
<p:commandButton id="save"
value="ajouter"
update=":nouv:btn"
actionListener="#{ddeBean.ajouter}">
</p:commandButton>
<p:outputPanel id="btn">
<h:outputText rendered="#{ddeBean.created}" value="#{ddeBean.message}"/>
<p:commandButton id="btn_cr" value="add" rendered="#{ddeBean.created}"
action="pool.xhtml?faces-redirect=true">
</p:commandButton>
</p:outputPanel>
</h:panelGrid>
</h:form>
ddeBean.java :
#ManagedBean(name = "ddeBean")
#RequestScoped
public class DemandeBean implements Serializable{
ddeDAO dao = new ddeDaoImpl();
private String nom;
public String message = "";
private boolean created = false;
public void test(ActionEvent event){
Demande p = new Demande();
p.setDde(this.nom);
dao.Nouveau_dde(p);
created = true;
this.setMessage("saved!");
}
}
When I click commandButton Ajouter the message an the commandbutton Add will be shown, but commandbutton Add doesn't redirect to pool.xhtml.
When you click on the button Add, the bean is recreated and the value #{ddeBean.created} then reinitialized to false so the button doesn't get rendered before action take place.
To fix that, you need to change the scope of your bean to #ViewScoped.
You should also make sure to replace
public void test(ActionEvent event){
by
public void ajouter(ActionEvent event){
if you want that your button work properly.
Another solution
Since you are using PrimeFaces, you could show your button by JavaScript :
<p:commandButton id="save"
value="ajouter"
oncomplete="panel-create.show();"
actionListener="#{ddeBean.ajouter}">
</p:commandButton>
<p:outputPanel id="btn" style="display: none;" widgetVar="panel-create">
<h:outputText value="#{ddeBean.message}"/>
<p:commandButton id="btn_cr" value="add"
action="pool.xhtml?faces-redirect=true">
</p:commandButton>
</p:outputPanel>
Note the oncomplete attribute on the p:commandButton, the widgetVar attribute on the p:panel and the rendered attributes removed.
Following is my requirement-
Here I have a p:panelGrid which can add & delete the row of table. The grid contains some p:inputText and various other PrimeFaces components along with a p:fileUpload component in each row. The component p:fileUpload is set with mode="advanced" auto="true" attributes, which automatically uploads the file and hide itself after completing the successful upload.
The whole p:panelGrid is in #ViewScoped, hence working fine. I kept p:fileUpload component in #RequestScoped since for each upload request it has to upload the file but after adding new row, the previous state is not persisted anymore. so the p:fileUpload is starting visible in previous rows also. That's what I don't want. Do I need to write any custom scope for it?
Below is the view-|
<h:form>
<p:panel id="agentForm" header="#{msg.AGENTS_INFORMATION}"
style="overflow:auto; margin-bottom: 2px">
<div align="center" style="margin-top: 20px; margin-bottom: 2px">
<ui:repeat value="#{agent.scenarioList}" var="c">
<p:panelGrid>
<p:row>
<p:column>
<p:inputText id="ipaddress" value="#{c.machineIpAddress}"
style="width:90%">
<p:watermark for="ipaddress" value="#{msg.MACHINE_IP_ADDRESS}" />
</p:inputText>
</p:column>
<p:column>
<p:inputText id="username" value="#{c.machineUsername}"
style="width:90%">
<p:watermark for="username" value="#{msg.MACHINE_USERNAME}" />
</p:inputText>
</p:column>
<p:column>
<p:password id="passwd" value="#{c.machinePassword}">
<p:watermark for="passwd" value="#{msg.MACHINE_PASSWORD}" />
</p:password>
</p:column>
<p:column id="fileUpload">
<p:fileUpload rendered="#{!fileUploadController.hidden}"
label="Upload Script" style="font-size: 100% !important;"
showButtons="false"
fileUploadListener="#{fileUploadController.upload}"
mode="advanced" auto="true" sizeLimit="100000"
allowTypes="/(\.|\/)(py|txt)$/"
update="fileUpload, outPanel, :message" />
<p:outputPanel id="outPanel">
<!-- Below outputLabel will be linked to uploaded file, so that User can see the file -->
<p:outputLabel style="cursor: pointer" value="View uploded Script"
label="View Script" rendered="#{fileUploadController.hidden}" />
</p:outputPanel>
</p:column>
<p:column>
<p:inputText id="testname" value="#{c.testName}"
style="width:90%">
<p:watermark for="testname" value="#{msg.TEST_NAME}" />
</p:inputText>
</p:column>
<p:column>
<p:spinner id="threads" value="#{c.threads}" min="1" max="500"
size="8">
<p:tooltip for="threads" value="#{msg.TEST_NAME}"
showEffect="slide" hideEffect="slide" />
</p:spinner>
</p:column>
<p:column>
<p:selectBooleanCheckbox id="chkSelected" value="#{c.selected}">
<p:tooltip for="chkSelected" value="#{msg.CHECKBOX}"
showEffect="slide" hideEffect="slide" />
</p:selectBooleanCheckbox>
</p:column>
</p:row>
</p:panelGrid>
</ui:repeat>
<p:toolbar style="margin-top: 10px;">
<p:toolbarGroup align="right">
<p:commandButton value="#{msg.ADD_IT}"
update=":message, agentForm"
actionListener="#{agent.addComponent()}" />
<p:commandButton value="#{msg.DELETE_IT}"
update=":message, agentForm"
actionListener="#{agent.deleteComponent()}" />
</p:toolbarGroup>
</p:toolbar>
</div>
</p:panel>
</h:form>
My managed bean which is in #ViewScoped look like this-
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
import javax.annotation.PostConstruct;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.ViewScoped;
import org.ravij.performance.model.Scenario;
#ManagedBean(name = "agent")
#ViewScoped
public class AgentInfo implements Serializable {
private static final long serialVersionUID = 1L;
List<Scenario> scenarioList;
#PostConstruct
public void initBean() {
this.scenarioList = new ArrayList<Scenario>();
this.scenarioList.add(new Scenario());
}
public void addComponent() {
if (this.scenarioList != null) {
this.scenarioList.add(new Scenario());
} else {
this.initBean();
}
}
public void deleteComponent() {
List<Scenario> itemsToDelete = new ArrayList<Scenario>();
if (this.scenarioList != null) {
for (Scenario b : this.scenarioList) {
if (b.isSelected()) {
itemsToDelete.add(b);
}
}
this.scenarioList.removeAll(itemsToDelete);
}
}
public List<Scenario> getScenarioList() {
return scenarioList;
}
public void setScenarioList(List<Scenario> scenarioList) {
this.scenarioList = scenarioList;
}
}
The Scenario object contains all the information of a row. Below is the code-
package org.ravij.performance.model;
import java.io.Serializable;
public class Scenario implements Serializable {
private String machineIpAddress;
private String machineUsername;
private String machinePassword;
private String uploadedFilePath;
private String testName;
private int threads = 1;
private boolean selected = false;
//Below are the getters and setter w.r.t all the above variables
//I am not putting it, to make the code short
}
The managed bean FileUploadController is in #RequestScoped
You should simply keep your hidden attribute with the other values in your #ViewScoped bean. Your current code has a single hidden attribute shared with all your <p:fileUpload components which is probably not what you want.
The behavior looks good because you are only updating the current fileUpload but according to your code all the others <p:fileUpload component are supposed to be hidden.
You should also put your <h:form into your <ui:repeat so that you can know the current line which is concerned by the file being uploaded by putting something like an index (which you can get from the <ui:repeat using varStatus attribute) or any other identifier to match the current line in an hidden input.
From #{fileUploadController.upload} the easiest manner to get the hidden parameter is to get the response from FacesContext as explained here : How to get parametrs to BackingBean from jsf page in <ui:repeat>
UPDATE
It was a bit harder than expected, the problem is that <p:fileUpload will send everything in the enclosing form (didn't try to play with process attribute) and thus it will be hard to know what row is concerned by the file upload.
Also I didn't knew that you couldn't put <h:form in your <ui:repeat but the behavior of your delete button is blocking as it expects to get everything in one form.
I made a working POC using dialog to put the fileupload outside, here is how :
The trivial Scenario.java :
public class Scenario implements Serializable {
private String machineIpAddress;
private String machineUsername;
private String machinePassword;
private String uploadedFilePath;
private String testName;
private int threads = 1;
private boolean selected = false;
private boolean hidden = false; // This is new
// + Getters/Setters
}
A few changes in the AgentInfo.java :
#ManagedBean(name = "agent")
#ViewScoped
public class AgentInfo implements Serializable {
private List<Scenario> scenarioList;
private Scenario currentScenario; // This is new
// I removed the #PostConstruct which I rarely use
public void addComponent() {
if (this.scenarioList != null) {
this.scenarioList.add(new Scenario());
}
}
public void deleteComponent() {
if (this.scenarioList == null) {
return;
}
List<Scenario> itemsToDelete = new ArrayList<Scenario>();
for (Scenario scenario : this.scenarioList) {
if (scenario.isSelected()) {
itemsToDelete.add(scenario);
}
}
this.scenarioList.removeAll(itemsToDelete);
}
// This is new, it must be called before opening the upload dialog
// in order to keep a pointer on the current scenario you are working on
public void prepareUpload(Scenario scenario) {
this.currentScenario = scenario;
}
// I put the upload method here
public void upload(FileUploadEvent event) {
// Do what you need to do here
this.currentScenario.setHidden(true);
RequestContext.getCurrentInstance().execute("uploadDialogWidget.hide()");
}
public List<Scenario> getScenarioList() {
if (this.scenarioList == null) {
this.scenarioList = new ArrayList<Scenario>();
this.scenarioList.add(new Scenario());
}
return scenarioList;
}
public void setScenarioList(List<Scenario> scenarioList) {
this.scenarioList = scenarioList;
}
public Scenario getCurrentScenario() {
return currentScenario;
}
public void setCurrentScenario(Scenario currentScenario) {
this.currentScenario = currentScenario;
}
}
The most changes are in the view, I put a <h:commandButton to open the dialog in the form. I also added the dialog, and added the redisplay attribute for your password fields (which is necessary to have if you want to keep the value after form submission).
Note that I removed references to a component with message id which was not gave, don't forget to reintroduce it.
the .xhtml :
<h:form id="agentForm">
<p:panel header="#{msg.AGENTS_INFORMATION}"
style="overflow:auto; margin-bottom: 2px">
<div align="center" style="margin-top: 20px; margin-bottom: 2px">
<ui:repeat value="#{agent.scenarioList}" var="c">
<p:panelGrid>
<p:row>
<p:column>
<p:inputText id="ipaddress" value="#{c.machineIpAddress}"
style="width:90%">
<p:watermark for="ipaddress" value="#{msg.MACHINE_IP_ADDRESS}" />
</p:inputText>
</p:column>
<p:column>
<p:inputText id="username" value="#{c.machineUsername}"
style="width:90%">
<p:watermark for="username" value="#{msg.MACHINE_USERNAME}" />
</p:inputText>
</p:column>
<p:column>
<p:password id="passwd" value="#{c.machinePassword}" redisplay="true">
<p:watermark for="passwd" value="#{msg.MACHINE_PASSWORD}" />
</p:password>
</p:column>
<p:column id="fileUpload">
<p:commandButton icon="ui-icon-arrowthick-1-n" value="Upload"
actionListener="#{agent.prepareUpload(c)}"
update=":uploadDialog"
oncomplete="uploadDialogWidget.show()"
rendered="#{!c.hidden}" />
<p:outputPanel id="outPanel">
<!-- Below outputLabel will be linked to uploaded file, so that User can see the file -->
<p:outputLabel style="cursor: pointer" value="View uploded Script"
rendered="#{c.hidden}" />
</p:outputPanel>
</p:column>
<p:column>
<p:inputText id="testname" value="#{c.testName}"
style="width:90%">
<p:watermark for="testname" value="#{msg.TEST_NAME}" />
</p:inputText>
</p:column>
<p:column>
<p:spinner id="threads" value="#{c.threads}" min="1" max="500"
size="8">
<p:tooltip for="threads" value="#{msg.TEST_NAME}"
showEffect="slide" hideEffect="slide" />
</p:spinner>
</p:column>
<p:column>
<p:selectBooleanCheckbox id="chkSelected" value="#{c.selected}">
<p:tooltip for="chkSelected" value="#{msg.CHECKBOX}"
showEffect="slide" hideEffect="slide" />
</p:selectBooleanCheckbox>
</p:column>
</p:row>
</p:panelGrid>
</ui:repeat>
<p:toolbar style="margin-top: 10px;">
<p:toolbarGroup align="right">
<p:commandButton value="#{msg.ADD_IT}" update="agentForm"
actionListener="#{agent.addComponent()}" />
<p:commandButton value="#{msg.DELETE_IT}" update="agentForm"
actionListener="#{agent.deleteComponent()}" />
</p:toolbarGroup>
</p:toolbar>
</div>
</p:panel>
</h:form>
<p:dialog id="uploadDialog" widgetVar="uploadDialogWidget" header="File upload">
<h:form rendered="#{!empty agent.currentScenario}">
<p:fileUpload
label="Upload Script" style="font-size: 100% !important;"
showButtons="false"
fileUploadListener="#{agent.upload}"
mode="advanced" auto="true" sizeLimit="100000"
allowTypes="/(\.|\/)(py|txt)$/"
update=":agentForm">
</p:fileUpload>
<p:commandButton value="Cancel" onclick="uploadDialogWidget.hide();" onstart="return false;" />
</h:form>
</p:dialog>
You should consider to move from <p:panelGrid to a <p:dataTable which has a built in mechanism to work with row selection.
i have these simple pages:
list.xhtml
<h:form id="form">
<h:dataTable value="#{testBean.model}" var="elem">
<h:column>
<f:facet name="header">code</f:facet>
#{elem.code}
</h:column>
<h:column>
<f:facet name="header">description</f:facet>
#{elem.description}
</h:column>
<h:column>
<f:facet name="header">action</f:facet>
<h:commandButton action="#{testBean.edit(elem)}" value="edit"/>
</h:column>
</h:dataTable>
</h:form>
edit.xhtml
<h:form id="form">
<h:panelGrid columns="2">
<h:outputLabel value="code"/>
<h:inputText value="#{testBean.selection.code}"/>
<h:outputLabel value="description"/>
<h:inputText value="#{testBean.selection.description}"/>
</h:panelGrid>
<h:commandButton action="#{testBean.update}" value="update"/>
</h:form>
and this bean:
#ManagedBean
public class TestBean implements Serializable
{
private static final long serialVersionUID = 1L;
#EJB
private PersistenceService service;
private Object selection;
private List<UnitType> model;
#PostConstruct
public void init()
{
model = service.findAll(UnitType.class);
}
public String edit(Object object)
{
System.out.println(Tracer.current(object));
setSelection(object);
return "edit";
}
public String update()
{
System.out.println(Tracer.current(selection));
return "list";
}
// getters and setters
}
so the table is rendered, when i click one of the "edit" buttons it navigates to "edit.jsf" showing filled input,
but when i click the "update" buttons it gives me this error:
javax.el.PropertyNotFoundException: /test2/edit.xhtml #27,54 value="#{testBean.selection.code}": Target Unreachable, 'null' returned null
note that i know how to implement a #ViewScoped interface to manage CRUD operations, but this is a simple proof of concept that i need to better understand JSF lifecycle.
so i want "testBean" to be #RequestScoped
UPDATE trying with f:viewParam, still not understanding...
list.xhtml
<?xml version="1.0" encoding="ISO-8859-1"?>
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:h="http://java.sun.com/jsf/html" xmlns:f="http://java.sun.com/jsf/core">
<h:head>
<title>test list</title>
</h:head>
<h:body>
<h:messages/>
<h:form id="form">
<h:dataTable value="#{testBean2.model}" rows="10" var="elem">
<h:column>
<f:facet name="header">converterString</f:facet>
#{elem.converterString}
</h:column>
<h:column>
<f:facet name="header">first name</f:facet>
#{elem.firstName}
</h:column>
<h:column>
<f:facet name="header">last name</f:facet>
#{elem.lastName}
</h:column>
<h:column>
<f:facet name="header">action</f:facet>
<h:commandButton action="#{testBean2.edit}" value="edit">
<f:param name="entity" value="#{elem.converterString}"/>
</h:commandButton>
<h:commandButton action="#{testBean2.edit2}" value="edit2">
<f:param name="entity" value="#{elem.converterString}"/>
</h:commandButton>
</h:column>
</h:dataTable>
</h:form>
</h:body>
</html>
edit.xhtml
<?xml version="1.0" encoding="ISO-8859-1"?>
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:h="http://java.sun.com/jsf/html" xmlns:f="http://java.sun.com/jsf/core">
<f:metadata>
<f:viewParam id="entityParam" name="entity" value="#{testBean2.selection}" converter="entityConverter" required="true"/>
</f:metadata>
<h:head>
<title>test edit</title>
</h:head>
<h:body>
<h:messages/>
<h:form id="form">
<h:panelGrid columns="2">
<h:outputLabel value="selection"/>
<h:outputText value="#{testBean2.selection.converterString}"/>
<h:outputLabel value="firstName"/>
<h:inputText value="#{testBean2.selection.firstName}"/>
<h:outputLabel value="lastName"/>
<h:inputText value="#{testBean2.selection.lastName}"/>
</h:panelGrid>
<h:commandButton action="#{testBean2.update}" value="update" ajax="false">
<f:param name="entity" value="#{testBean2.selection.converterString}"/>
</h:commandButton>
</h:form>
</h:body>
</html>
testBean2.java
#ManagedBean
public class TestBean2 implements Serializable
{
private static final long serialVersionUID = 1L;
#EJB
private PersistenceService service;
private Object selection;
private List<Person> model;
#PostConstruct
public void init()
{
Tracer.out();
model = service.queryAll(Person.class);
}
public String edit()
{
JsfUtils.addSuccessMessage("edited");
return "edit";
}
public String edit2()
{
JsfUtils.addSuccessMessage("edited");
return "edit?faces-redirect=true&includeViewParams=true";
}
public void update()
{
Tracer.out(selection);
JsfUtils.addSuccessMessage("updated");
}
// getters and setters
}
if i press "edit" button it goes to edit page, but selection is null and no message is showed.
if i press "edit2" button it goes to edit page, but selection is null, showing required message and the url is edit.jsf?entity=
what am i doing wrong?
As my understand, when your second request come to testBean, selection Object is null. If you run this with session bean you may not get this error.
The way I see it, there's no clean way to achieve what you want.
I'll suggest you simply pass around an Id attr between requests as a simple request parameter. So in your post constructor, check if the parameter value is set and based on that, perform a look in your persistence layer.
Alternatively, using the setup you already have, bind the:
<h:inputText value="#{testBean.selection.code}"/>
component to your backing bean and call getValue() on it when necessary. Either way, still untidy.
If you find any other way, please let us know.
Finally I found a way: data will be in a long scope, bean in short.
Note that this is just a proof of concept, not a real use case. And be aware, when dealing with #RequestScope beans, of PrimeFaces lazy DataTable model scope
#ManagedBean
public class TestBean
{
#EJB
private PersistenceService service;
#ManagedProperty("#{viewScope.item}")
private Item item;
#ManagedProperty("#{sessionScope.model}")
private EntityDataModel<Item> model;
#PostConstruct
public void init()
{
if(model == null)
{
model = new EntityDataModel<Item>(Item.class);
Faces.setSessionAttribute("model", model);
}
}
public String update()
{
Faces.getFlash().setKeepMessages(true);
try
{
item = service.update(item);
Faces.setViewAttribute("item", item);
JsfUtils.addSuccessMessage("updated");
return "view?faces-redirect=true&includeViewParams=true";
}
catch(Exception e)
{
e.printStackTrace();
JsfUtils.addErrorMessage(e);
}
return null;
}
// getters and setters, other actions, ...
}
list.xhtml
<p:dataTable value="#{testBean.model}" var="elem" ...>
...
<p:column exportable="false" toggleable="false" headerText="#{bundle.actions}">
<!-- two techniques available for navigation -->
<p:button outcome="view?id=#{elem.converterString}" icon="#{icons.view}" />
<p:commandButton rendered="#{user.isEditAllowed(elem)}"
action="edit?faces-redirect=true&includeViewParams=true" process="#form"
icon="#{icons.edit}">
<f:param name="id" value="#{elem.converterString}" />
</p:commandButton>
</p:column>
</p:dataTable>
view.xhtml
<f:metadata>
<o:viewParam id="itemId" name="id" value="#{viewScope.item}" required="true"
converter="entityConverter" />
</f:metadata>
<ui:composition template="/WEB-INF/templates/template.xhtml">
<ui:define name="content">
<p:panelGrid columns="2">
<h:outputLabel value="#{bundle.name}" />
<h:outputText value="#{item.name}" />
...
</p:panelGrid>
<p:button outcome="list" value="#{bundle.list}" icon="#{icons.list}" />
<p:button rendered="#{user.isEditAllowed(item)}"
outcome="edit?id=#{item.converterString}" value="#{bundle.edit}"
icon="#{icons.edit}" />
</ui:define>
</ui:composition>
edit.xhtml
<f:metadata>
<o:viewParam id="itemId" name="id" value="#{viewScope.item}" required="true"
converter="entityConverter" />
</f:metadata>
<ui:composition template="/WEB-INF/templates/template.xhtml">
<ui:define name="content">
<p:panelGrid columns="2">
<h:outputLabel value="#{bundle.name}" />
<h:panelGroup>
<p:inputText id="name" value="#{item.name}" />
<p:message for="name" />
</h:panelGroup>
...
</p:panelGrid>
<p:commandButton process="#form" update="#form" action="#{testBean.update}"
value="#{bundle.update}" icon="#{icons.update}" />
<p:button outcome="view?id=#{item.converterString}" value="#{bundle.cancel}"
icon="#{icons.cancel}" />
</ui:define>
</ui:composition>