Using same page for Update and Create operation of an entity
I have one staff table with usual fields - staffid, username, password, firstname, lastname. Now, i have a Create staff JSP page. Also, i want to use same page to update the staff record selected from Search Staff screen. Following is the page content
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="f" uri="http://java.sun.com/jsf/core"%>
<%@ taglib prefix="h" uri="http://java.sun.com/jsf/html"%>
<%@ taglib uri="http://richfaces.org/rich" prefix="rich"%>
<%@ taglib uri="http://richfaces.org/a4j" prefix="a4j"%>
<rich:tabPanel switchType="client" width="670" height="600">
<rich:tab label="#{empty staff.staffid ? 'Craete' : 'Update'} Staff">
<rich:layout>
<rich:layoutPanel position="top" width="100%">
</rich:layoutPanel>
<rich:layoutPanel position="left" width="20%">
</rich:layoutPanel>
<rich:layoutPanel position="center" width="80%">
<rich:panel>
<f:facet name="header">
<h:outputText value="Staff Details (* are mandatory fields)" />
</f:facet>
<h:panelGrid columns="4">
<h:outputText value="Staff Id" rendered="#{! empty staff.staffid}"/>
<h:inputText id="StaffId" value="#{staff.staffid}" rendered="#{! empty staff.staffid}" disabled="true"/>
<h:outputText value="* Username" />
<h:inputText id="Username" value="#{staff.username}" required="true" maxlength="30"/>
<h:outputText value="* Password" />
<h:inputSecret id="Password" value="#{staff.password}" required="true" maxlength="30" redisplay="true"/>
</h:panelGrid>
<rich:message for="Username" ></rich:message>
<rich:message for="Password" ></rich:message>
</rich:panel>
<rich:panel>
<f:facet name="header">
<h:outputText value="Personal Details (* are mandatory fields)" />
</f:facet>
<h:panelGrid columns="4">
<h:outputText value="* First Name" />
<h:inputText id="FirstName" value="#{staff.firstName}" required="true"/>
<h:outputText value="* Last Name" />
<h:inputText id="LastName" value="#{staff.lastName}" required="true"/>
</h:panelGrid>
<rich:message for="FirstName" ></rich:message>
<rich:message for="LastName" ></rich:message>
</rich:panel>
</rich:layoutPanel>
<rich:layoutPanel position="bottom">
<h:panelGrid columns="2">
<a4j:commandButton value="Submit" action="#{staff.createOrUpdate}" reRender="pagecontent">
</a4j:commandButton>
<a4j:commandButton value="Cancel">
</a4j:commandButton>
</h:panelGrid>
</rich:layoutPanel>
</rich:layout>
</rich:tab>
</rich:tabPanel>
following is the Staff backing bean
package app.onlinetest.staff;
import java.io.Serializable;
import java.util.Date;
import java.util.List;
import org.hibernate.Session;
import app.onlinetest.HibernateUtil;
import app.onlinetest.MessageHandler;
public class Staff implements Serializable{
private String staffid;
private String firstname;
private String lastname;
private String username;
private String password;
private Date dateofcreation = new Date();
public String getStaffid() {
return staffid;
}
public void setStaffid(String staffid) {
this.staffid = staffid;
}
public String getFirstName() {
return firstname;
}
public void setFirstName(String firstname) {
this.firstname = firstname;
}
public String getLastName() {
return lastname;
}
public void setLastName(String lastname) {
this.lastname = lastname;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public Date getDateofcreation() {
return dateofcreation;
}
public void setDateofcreation(Date dateofcreation) {
this.dateofcreation = dateofcreation;
}
private String generateStaffId(){
String newStaffId = null;
String query = "select max(stf.id) from Staff stf";
Session session = HibernateUtil.getSessionFactory().getCurrentSession();
List list = session.createQuery(query.toString()).list();
if(!list.isEmpty()){
String maxStaffId = (String)list.get(0);
int i = 3;
while (maxStaffId.charAt(i) == '0'){
i++;
}
int maxNumber = Integer.parseInt(maxStaffId.substring(i));
StringBuffer tmpNewStaffId = new StringBuffer("STF");
for(i=3; i < (10-String.valueOf(maxNumber+1).length()); i++){
tmpNewStaffId.append("0");
}
tmpNewStaffId.append(maxNumber+1);
newStaffId = tmpNewStaffId.toString();
}
else
newStaffId = "STF0000001";
return newStaffId;
}
public void createOrUpdate(){
Session session = HibernateUtil.getSessionFactory().getCurrentSession();
session.beginTransaction();
if(staffid == null || "".equals(staffid)){
this.staffid = generateStaffId();
session.save(this);
MessageHandler.getInstance().setMessageBoard(MessageHandler.STAFF_CREATE_SUCCESS);
}else{
session.update(this);
MessageHandler.getInstance().setMessageBoard(MessageHandler.STAFF_UPDATE_SUCCESS);
}
session.getTransaction().commit();
return ;
}
@Override
public String toString() {
return "Staff [staffid=" + staffid + ", firstname=" + firstname + ", username="
+ username + ", password=" + password + ", dateofcreation="
+ dateofcreation + "]";
}
}
<managed-bean> <managed-bean-name>staff</managed-bean-name> <managed-bean-class>app.onlinetest.staff.Staff</managed-bean-class> <managed-bean-scope>request</managed-bean-scope> </managed-bean>
Now, to use the same Create staff screen to update the staff, when the user selects a staff from search screen and clicks on 'Updat' button, i set selected Staff record into the request scope using FacesContext valule binding and forward to Create Staff page. Therefore, when on update screen i see all the fields are populated. After changin fields when user clicks 'Submit' on Create Staff page 'createOrUpdate' action method is called in which i check if staffid is not null (i.e. update case) then update the record else create the record.
The problem here i am facing is that i always get 'staffid' as null whether it is update or create operation. in case of 'update' operation i get all the fields set (i.e username, password, firstname, lastname) but not staffid
what could be the reason?