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From "kishore.sadanandam" <kishore.sadanan...@gmail.com>
Subject <tr:subform> issue with setting backing bean values
Date Tue, 06 Apr 2010 10:27:46 GMT

Hi,

I have an issue using <tr:subform> component in my JSF page.

Issue:
When I have a submit button in my form outside all subforms, on clicking
this button components inside subform are not set with values in my backing
bean.

Reproduce steps:
1. Create a new JSF page, say SubformTest.jspx, as below.

<?xml version='1.0' encoding='windows-1252'?>
<jsp:root xmlns:jsp="http://java.sun.com/JSP/Page" version="2.1"
          xmlns:f="http://java.sun.com/jsf/core"
          xmlns:h="http://java.sun.com/jsf/html"
          xmlns:tr="http://myfaces.apache.org/trinidad"
          xmlns:trh="http://myfaces.apache.org/trinidad/html">
  <jsp:output omit-xml-declaration="true" doctype-root-element="HTML"
              doctype-system="http://www.w3.org/TR/html4/loose.dtd"
              doctype-public="-//W3C//DTD HTML 4.01 Transitional//EN"/>
  <jsp:directive.page contentType="text/html;charset=windows-1252"/>
  <f:view>
    <trh:html>
      <trh:head title="Subform test">
        <meta http-equiv="Content-Type"
              content="text/html; charset=windows-1252"/>
      </trh:head>
      <trh:body>
        <tr:form id="MainForm1">
          <tr:messages/>
          <tr:subform id="SubForm1">
            <tr:panelFormLayout>
              <tr:inputText id="FirstNameInput" label="First Name"
required="true" 
                            value="#{SubformPageBean.firstName}"/>
              <tr:inputText id="MiddleNameInput" label="Middle Name"
                            value="#{SubformPageBean.middleName}"/>
              <tr:inputText id="LastNameInput" label="Last Name"
required="true" 
                            value="#{SubformPageBean.lastName}"/>
            </tr:panelFormLayout>
            <tr:commandButton text="Apply 1" id="ApplyButton1"
                              action="#{SubformPageBean.apply1}"/>
          </tr:subform>
          <tr:subform id="SubForm2">
            <tr:panelFormLayout>
              <tr:inputText id="Address" label="Address" 
                            value="#{SubformPageBean.address}"/>
            </tr:panelFormLayout>
            <tr:commandButton text="Apply 2" id="ApplyButton2"
                              action="#{SubformPageBean.apply2}"/>
          </tr:subform>
          <tr:commandButton text="Apply" id="ApplyButton"
                              action="#{SubformPageBean.apply}"/>
        </tr:form>
      </trh:body>
    </trh:html>
  </f:view>
</jsp:root>

2. Create managed bean "SubformPageBean" in request scope with new class
apache.trinidad.test.SubformPageBean

3. Create managed bean "SubformPageBean" Java class as below:

public class SubformPageBean {
    private String firstName;
    private String middleName;
    private String lastName;
    private String address;

    public SubformPageBean() {
    }

    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }

    public String getFirstName() {
        return firstName;
    }

    public void setMiddleName(String middleName) {
        this.middleName = middleName;
    }

    public String getMiddleName() {
        return middleName;
    }

    public void setLastName(String lastName) {
        this.lastName = lastName;
    }

    public String getLastName() {
        return lastName;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    public String getAddress() {
        return address;
    }

    public String apply(){
        System.out.println("Clicked: apply");
        printValues();
        
        return null;
    }

    public String apply1(){
        System.out.println("Clicked: apply1");
        printValues();
        
        return null;
    }

    public String apply2(){
        System.out.println("Clicked: apply2");
        printValues();
        
        return null;
    }
    public void printValues(){
        System.out.println("First Name: "+firstName);
        System.out.println("Middle Name: "+middleName);
        System.out.println("Last Name: "+lastName);
        System.out.println("Address: "+address);
    }
}
 
4. Run created JSF page SubformTest.jspx after deploying it to server.

5. Clicking "Apply 1" button will print values like below in System.out:

[STDOUT] Clicked: apply1
[STDOUT] First Name: Kishore
[STDOUT] Middle Name: Katikala
[STDOUT] Last Name: Sadanandam
[STDOUT] Address: null

6. Clicking "Apply 2" button will print values like below in System.out:

[STDOUT] Clicked: apply2
[STDOUT] First Name: null
[STDOUT] Middle Name: null
[STDOUT] Last Name: null
[STDOUT] Address: Chennai

7. Clicking "Apply" button will print values like below in System.out:

[STDOUT] Clicked: apply
[STDOUT] First Name: null
[STDOUT] Middle Name: null
[STDOUT] Last Name: null
[STDOUT] Address: null

Questions:
In step 7, I am expecting all subform components value set properly since
the button exists in scope of the form.
This kind of behaviour is easily achieved using multiple <tr:form> instead. 
Is this a bug with <tr:subform> that require fix? Is there any workaround to
this?

Regards,
Kishore K S
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