Can you just use simple objects in the form?
public class MyActionForm extends ActionForm {
AnotherActionForm1 af1;
AnotherActionForm2 af2;
MyActionForm() {
af1 = new SimpleObject1AsAnotherActionForm1();
af2 = new SimpleObject2AsAnotherActionForm2();
}
}
Access:
<%= masterForm.af1.field1 %>
Peiyun
-----Original Message-----
From: Frank W. Zammetti [mailto:[EMAIL PROTECTED]
Sent: September 22, 2006 4:23 PM
To: Struts Users Mailing List
Cc: Struts Users Mailing List
Subject: Re: Nested form beans
On Fri, September 22, 2006 3:59 pm, Hubert Rabago wrote:
> I can't see anything that would cause your problem.
> I guess if it were me, I'd fire up my debugger and start stepping
> through some code.
> Sorry.
Yeah, that's the next step. Was hoping to avoid it with an easy answer,
but that's the way it goes sometimes :)
> All I can say at this point is that I know what you're doing is
> possible cause that's how FormDef does nested beans.
Actually, that's a pretty big help in and of itself... I wasn't frankly
aware the subbeans would get populated, so knowing it *should* work at
least means I'm not on a wild goose chase. Thanks for the effort, I
definitely appreciate it!
> Hubert
Frank
> On 9/22/06, Frank W. Zammetti <[EMAIL PROTECTED]> wrote:
>> Hehe, way ahead of you :) I put logging in every method...
>> constructors,
>> getters setter, all three forms. Here's the output:
>>
>> MasterForm constructor
>> Tab1Form constructor
>> Tab2Form constructor
>> --NOW IN JSP--
>> MasterForm getTab1Form() = [EMAIL PROTECTED]
>> MasterForm getTab2Form() = [EMAIL PROTECTED]
>> getting field1 = null
>> getting field2 = null
>>
>> Notice the fields don't get set, nor do the subbeans get set on the
>> containing bean. The MasterForm constructor instantiates Tab1Form and
>> Tab2Form, as the output indicates.
>>
>> Frank
>>
>>
>> --
>> Frank W. Zammetti
>> Founder and Chief Software Architect
>> Omnytex Technologies
>> http://www.omnytex.com
>> AIM/Yahoo: fzammetti
>> MSN: [EMAIL PROTECTED]
>> Author of "Practical Ajax Projects With Java Technology"
>> (2006, Apress, ISBN 1-59059-695-1)
>> Java Web Parts - http://javawebparts.sourceforge.net
>> Supplying the wheel, so you don't have to reinvent it!
>>
>> On Fri, September 22, 2006 2:53 pm, Hubert Rabago wrote:
>> > It still sounds like Struts is getting nulls for the subbeans when it
>> > tries to populate subbean.fieldX. Put some more logging, this time in
>> > the getters for the subbean in MasterForm, and log what it's
>> > returning.
>> >
>> > Hubert
>> >
>> > On 9/22/06, Frank W. Zammetti <[EMAIL PROTECTED]> wrote:
>> >> As a follow-up, I threw some logging in the field1 and field2 setters
>> in
>> >> the subbeans... they don't appear to ever get called. I don't have
>> to
>> >> do
>> >> anything special to tell Struts I'm using nested beans, do I? I
>> didn't
>> >> think so...
>> >>
>> >> Frank
>> >>
>> >>
>> >> --
>> >> Frank W. Zammetti
>> >> Founder and Chief Software Architect
>> >> Omnytex Technologies
>> >> http://www.omnytex.com
>> >> AIM/Yahoo: fzammetti
>> >> MSN: [EMAIL PROTECTED]
>> >> Author of "Practical Ajax Projects With Java Technology"
>> >> (2006, Apress, ISBN 1-59059-695-1)
>> >> Java Web Parts - http://javawebparts.sourceforge.net
>> >> Supplying the wheel, so you don't have to reinvent it!
>> >>
>> >> On Fri, September 22, 2006 2:47 pm, Frank W. Zammetti wrote:
>> >> > Hi Chris.. thanks for the suggestion, I gave that a shot at one
>> point
>> >> > actually... what I get is now the fields in the subforms (I guess
>> >> that's
>> >> > as good a term as any!) don't get set...
>> >> >
>> >> > masterForm = [EMAIL PROTECTED]
>> >> > tab1Form = [EMAIL PROTECTED]
>> >> > tab2Form = [EMAIL PROTECTED]
>> >> > field1 = null
>> >> > field2 = null
>> >> >
>> >> > That's what I see in my final JSP output.
>> >> >
>> >> > Frank
>> >> >
>> >> >
>> >> > --
>> >> > Frank W. Zammetti
>> >> > Founder and Chief Software Architect
>> >> > Omnytex Technologies
>> >> > http://www.omnytex.com
>> >> > AIM/Yahoo: fzammetti
>> >> > MSN: [EMAIL PROTECTED]
>> >> > Author of "Practical Ajax Projects With Java Technology"
>> >> > (2006, Apress, ISBN 1-59059-695-1)
>> >> > Java Web Parts - http://javawebparts.sourceforge.net
>> >> > Supplying the wheel, so you don't have to reinvent it!
>> >> >
>> >> > On Fri, September 22, 2006 2:40 pm, Chris Pratt wrote:
>> >> >> In your no-arg constructor of your outer ActionForm (the
>> container),
>> >> >> make
>> >> >> sure it instantiates each of the nested ActionForms using their
>> >> no-arg
>> >> >> constructors.
>> >> >> (*Chris*)
>> >> >>
>> >> >> On 9/22/06, Frank W. Zammetti <[EMAIL PROTECTED]> wrote:
>> >> >>>
>> >> >>> Sorry, by af1 and af2 I did mean actionForm1 and actionForm2...
>> my
>> >> >>> mistake
>> >> >>> wasn't quite *THAT* obvious! ;) LOL
>> >> >>>
>> >> >>> Frank
>> >> >>>
>> >> >>>
>> >> >>> --
>> >> >>> Frank W. Zammetti
>> >> >>> Founder and Chief Software Architect
>> >> >>> Omnytex Technologies
>> >> >>> http://www.omnytex.com
>> >> >>> AIM/Yahoo: fzammetti
>> >> >>> MSN: [EMAIL PROTECTED]
>> >> >>> Author of "Practical Ajax Projects With Java Technology"
>> >> >>> (2006, Apress, ISBN 1-59059-695-1)
>> >> >>> Java Web Parts - http://javawebparts.sourceforge.net
>> >> >>> Supplying the wheel, so you don't have to reinvent it!
>> >> >>>
>> >> >>> On Fri, September 22, 2006 1:31 pm, Frank W. Zammetti wrote:
>> >> >>> > Hi Hubert,
>> >> >>> >
>> >> >>> > Yes, I get nulls for af1 and af2... I do have getters and
>> setters
>> >> for
>> >> >>> > them.
>> >> >>> >
>> >> >>> > Lemme throw some data your way... I was hoping to avoid posting
>> >> all
>> >> >>> this,
>> >> >>> > but I suspect there to be something my eyes just aren't
>> catching,
>> >> >>> so...
>> >> >>> >
>> >> >>> >
>> >> >>> > Here's ActionForm1:
>> >> >>> >
>> >> >>> >
>> >> >>> > package app.test.formbeans;
>> >> >>> > import org.apache.struts.action.ActionForm;
>> >> >>> > public class Action1Form extends ActionForm {
>> >> >>> > private String field1;
>> >> >>> > public void setField1(String inField1) {
>> >> >>> > this.field1 = inField1;
>> >> >>> > }
>> >> >>> > public String getField1() {
>> >> >>> > return this.field1;
>> >> >>> > }
>> >> >>> > }
>> >> >>> >
>> >> >>> >
>> >> >>> > ActionForm2 is identical, just replacing the number 1 with 2
>> >> >>> everywhere.
>> >> >>> > Here's MasterForm:
>> >> >>> >
>> >> >>> >
>> >> >>> > package app.test.formbeans;
>> >> >>> > import org.apache.struts.action.ActionForm;
>> >> >>> > public class MasterForm extends ActionForm {
>> >> >>> > public Action1Form action1Form;
>> >> >>> > public Action2Form action2Form;
>> >> >>> > public void setAction1Form(Action1Form inAction1Form) {
>> >> >>> > this.action1Form = inAction1Form;
>> >> >>> > }
>> >> >>> > public Action1Form getAction1Form() {
>> >> >>> > return this.action1Form;
>> >> >>> > }
>> >> >>> > public void setAction2Form(Action2Form inAction2Form) {
>> >> >>> > this.action2Form = inAction2Form;
>> >> >>> > }
>> >> >>> > public Action2Form getAction2Form() {
>> >> >>> > return this.action2Form;
>> >> >>> > }
>> >> >>> > }
>> >> >>> >
>> >> >>> >
>> >> >>> > The Action everything gets submitted to is just a
>> ForwardAction,
>> >> >>> which
>> >> >>> > forwards to:
>> >> >>> >
>> >> >>> >
>> >> >>> > <%@ page language="java" import="app.test.formbeans.*" %>
>> >> >>> > <%
>> >> >>> > MasterForm masterForm =
>> >> >>> (MasterForm)request.getAttribute("masterForm");
>> >> >>> > %>
>> >> >>> > <%="masterForm = " + masterForm + "<br>"%>
>> >> >>> > <%
>> >> >>> > Tab1Form tab1Form = null;
>> >> >>> > Tab2Form tab2Form = null;
>> >> >>> > if (masterForm != null) {
>> >> >>> > tab1Form = masterForm.getTab1Form();
>> >> >>> > tab2Form = masterForm.getTab2Form();
>> >> >>> > }
>> >> >>> > %>
>> >> >>> > <%="tab1Form = " + tab1Form + "<br>"%>
>> >> >>> > <%="tab2Form = " + tab2Form + "<br>"%>
>> >> >>> > <% if (tab1Form != null) { %>
>> >> >>> > <%="field1 = " + tab1Form.getField1() + "<br>"%>
>> >> >>> > <% } %>
>> >> >>> > <% if (tab2Form != null) { %>
>> >> >>> > <%="field2 = " + tab2Form.getField2() + "<br>"%>
>> >> >>> > <% } %>
>> >> >>> >
>> >> >>> >
>> >> >>> > The result I see from this is:
>> >> >>> >
>> >> >>> >
>> >> >>> > masterForm = [EMAIL PROTECTED]
>> >> >>> > tab1Form = null
>> >> >>> > tab2Form = null
>> >> >>> >
>> >> >>> >
>> >> >>> > The page that does that submit, in its final rendered form on
>> the
>> >> >>> client
>> >> >>> > is:
>> >> >>> >
>> >> >>> >
>> >> >>> > <html>
>> >> >>> > <head>
>> >> >>> > <script>
>> >> >>> > var finalSubmit = null;
>> >> >>> > function getXHR() {
>> >> >>> > if (window.XMLHttpRequest) {
>> >> >>> > return new XMLHttpRequest();
>> >> >>> > } else if (window.ActiveXObject) {
>> >> >>> > return new ActiveXObject("Microsoft.XMLHTTP");
>> >> >>> > }
>> >> >>> > }
>> >> >>> > function submitAll() {
>> >> >>> > var tab1Form = dojo.io.encodeForm(
>> >> >>> > document.getElementById("tab1Form"));
>> >> >>> > var tab2Form = dojo.io.encodeForm(
>> >> >>> > document.getElementById("tab2Form"));
>> >> >>> > finalSubmit = getXHR();
>> >> >>> > finalSubmit.onreadystatechange = finalSubmitCallback;
>> >> >>> > finalSubmit.open("POST", "final.do", true);
>> >> >>> > finalSubmit.send(tab1Form + tab2Form);
>> >> >>> > }
>> >> >>> > function finalSubmitCallback() {
>> >> >>> > if (finalSubmit.readyState == 4) {
>> >> >>> > document.getElementById("divResult").innerHTML =
>> >> >>> > finalSubmit.responseText;
>> >> >>> > }
>> >> >>> > }
>> >> >>> > </script>
>> >> >>> > </head>
>> >> >>> > <body onload="init();">
>> >> >>> > <form name="masterForm" id="tab1Form" method="post"
>> >> >>> > action="/test/tab1.do">
>> >> >>> > Field1: <input name="tab1Form.field1" value="val1"
>> >> >>> type="text"><br>
>> >> >>> > </form>
>> >> >>> > <br>
>> >> >>> > <form name="masterForm" id="tab2Form" method="post"
>> >> >>> > action="/test/tab2.do">
>> >> >>> > Field2: <input name="tab2Form.field2" value="val2"
>> >> >>> type="text"><br>
>> >> >>> > </form>
>> >> >>> > <br>
>> >> >>> > <input value="Submit All" onclick="submitAll();"
>> type="button">
>> >> >>> > <br><br>
>> >> >>> > <div id="divResult"></div>
>> >> >>> > </body>
>> >> >>> > </html>
>> >> >>> >
>> >> >>> >
>> >> >>> > Note that I removed all the Dojo-related stuff, and some stuff
>> >> that
>> >> >>> isn't
>> >> >>> > related to this submissino, just to try and keep it small, but,
>> >> the
>> >> >>> > important thing to note is that when the submission is made,
>> the
>> >> >>> request
>> >> >>> > that goes across is a POST to
>> http://localhost:8080/test/final.do,
>> >> as
>> >> >>> > expected, and the POST body is:
>> >> >>> >
>> >> >>> > tab1Form.field1=val1&tab2Form.field2=val2&
>> >> >>> >
>> >> >>> > ...also as expected, verified in Firebug. Lastly, here's
>> >> >>> struts-config:
>> >> >>> >
>> >> >>> >
>> >> >>> > <?xml version="1.0" encoding="ISO-8859-1" ?>
>> >> >>> > <!DOCTYPE struts-config PUBLIC "-//Apache Software
>> Foundation//DTD
>> >> >>> Struts
>> >> >>> > Configuration 1.2//EN"
>> >> >>> > "http://jakarta.apache.org/struts/dtds/struts-config_1_2.dtd";>
>> >> >>> > <struts-config>
>> >> >>> > <form-beans>
>> >> >>> > <form-bean name="masterForm"
>> >> type="app.test.formbeans.MasterForm"
>> >> >>> />
>> >> >>> > </form-beans>
>> >> >>> > <action-mappings>
>> >> >>> > <action path="/final" type="app.test.actions.FinalAction"
>> >> >>> > name="masterForm" scope="request" validate="false">
>> >> >>> > <forward name="defaultForward" path="/final.jsp" />
>> >> >>> > </action>
>> >> >>> > </action-mappings>
>> >> >>> > </struts-config>
>> >> >>> >
>> >> >>> >
>> >> >>> > Note here that I removed the stuff that generated the markup
>> from
>> >> >>> above
>> >> >>> > too, since that seems to be working just fine, I'm pretty sure
>> >> this
>> >> >>> is
>> >> >>> all
>> >> >>> > that would be relevant.
>> >> >>> >
>> >> >>> > So, seeing any obvious blunders on my part? Thanks Hubert!
>> >> >>> >
>> >> >>> > Frank
>> >> >>> >
>> >> >>> >
>> >> >>> > --
>> >> >>> > Frank W. Zammetti
>> >> >>> > Founder and Chief Software Architect
>> >> >>> > Omnytex Technologies
>> >> >>> > http://www.omnytex.com
>> >> >>> > AIM/Yahoo: fzammetti
>> >> >>> > MSN: [EMAIL PROTECTED]
>> >> >>> > Author of "Practical Ajax Projects With Java Technology"
>> >> >>> > (2006, Apress, ISBN 1-59059-695-1)
>> >> >>> > Java Web Parts - http://javawebparts.sourceforge.net
>> >> >>> > Supplying the wheel, so you don't have to reinvent it!
>> >> >>> >
>> >> >>> > On Fri, September 22, 2006 1:10 pm, Hubert Rabago wrote:
>> >> >>> >> So what does happen when you submit the form? Are you getting
>> >> NPEs?
>> >> >>> >>
>> >> >>> >> By the time Struts attempts to populate the form bean, the
>> nested
>> >> >>> >> forms should already be instantiated. You should have getters
>> >> and
>> >> >>> >> setters for af1 and af2, and getAf1() and getAf2() should not
>> >> return
>> >> >>> a
>> >> >>> >> null. This could be an issue if the form bean is new, either
>> >> >>> because
>> >> >>> >> it's in request scope, or in session scope but was not
>> previously
>> >> >>> >> instantiated.
>> >> >>> >>
>> >> >>> >> Hubert
>> >> >>> >>
>> >> >>> >> On 9/22/06, Frank W. Zammetti <[EMAIL PROTECTED]> wrote:
>> >> >>> >>> I'm facing a situation where ideally I'd like to have a
>> single
>> >> >>> >>> ActionForm
>> >> >>> >>> like so:
>> >> >>> >>>
>> >> >>> >>> public class MyActionForm extends ActionForm {
>> >> >>> >>> AnotherActionForm1 af1;
>> >> >>> >>> AnotherActionForm2 af2;
>> >> >>> >>> }
>> >> >>> >>>
>> >> >>> >>> When in my JSP I do:
>> >> >>> >>>
>> >> >>> >>> <html:text property="af1.field1" />
>> >> >>> >>>
>> >> >>> >>> ...I do indeed see the value as I expect. The way I did this
>> is
>> >> to
>> >> >>> >>> have
>> >> >>> >>> an Action mapping that references MyActionForm, then within
>> the
>> >> >>> Action
>> >> >>> >>> I
>> >> >>> >>> instantiate AnotherActionForm1, set the value of field1 on
>> it,
>> >> and
>> >> >>> then
>> >> >>> >>> set af1 to that new AnotherActionForm1 instance. That all
>> works
>> >> >>> >>> nicely.
>> >> >>> >>>
>> >> >>> >>> Here's where I run into a problem...
>> >> >>> >>>
>> >> >>> >>> On the page I basically have 2 separate HTML forms, one for
>> >> >>> >>> AnotherActionForm1 and another for AnotherActionForm2.
>> However,
>> >> I
>> >> >>> have
>> >> >>> >>> a
>> >> >>> >>> SINGLE submit button at the end (just plain button that makes
>> an
>> >> >>> AJAX
>> >> >>> >>> request). onClick of that button, I create a query string
>> from
>> >> the
>> >> >>> >>> values
>> >> >>> >>> of both forms, and make a request to the server with the
>> query
>> >> >>> string
>> >> >>> >>> attached. The parameter names of the query string arguments
>> are
>> >> >>> >>> af1.field1 and af2.field2, mimicing what's in MyActionForm.
>> The
>> >> >>> >>> mapping
>> >> >>> >>> that the request goes to again references MyActionForm.
>> >> >>> >>>
>> >> >>> >>> What I've been told should happen is that Struts should be
>> able
>> >> to
>> >> >>> >>> instantiate those two nested beans and set the properties,
>> since
>> >> >>> the
>> >> >>> >>> parameter names give it the information it needs. This does
>> not
>> >> >>> >>> however
>> >> >>> >>> seem to be happening.
>> >> >>> >>>
>> >> >>> >>> So, two questions... first, is that in fact the expected
>> >> >>> behavoir? And
>> >> >>> >>> two, if so, any ideas what I'm doing wrong? I can post all
>> the
>> >> >>> >>> pertinent
>> >> >>> >>> config and code, but thought it might be something more
>> generic
>> >> >>> that
>> >> >>> >>> wouldn't require all that. This is the first time I've ever
>> had
>> >> a
>> >> >>> need
>> >> >>> >>> to
>> >> >>> >>> nest forms like this, so it's a new question for me.
>> >> >>> >>>
>> >> >>> >>> Thanks all!
>> >> >>> >>>
>> >> >>> >>> Frank
>> >> >>> >>>
>> >> >>> >>>
>> >> >>> >>> --
>> >> >>> >>> Frank W. Zammetti
>> >> >>> >>> Founder and Chief Software Architect
>> >> >>> >>> Omnytex Technologies
>> >> >>> >>> http://www.omnytex.com
>> >> >>> >>> AIM/Yahoo: fzammetti
>> >> >>> >>> MSN: [EMAIL PROTECTED]
>> >> >>> >>> Author of "Practical Ajax Projects With Java Technology"
>> >> >>> >>> (2006, Apress, ISBN 1-59059-695-1)
>> >> >>> >>> Java Web Parts - http://javawebparts.sourceforge.net
>> >> >>> >>> Supplying the wheel, so you don't have to reinvent it!
>> >> >>> >>>
>> >> >>> >>> ---------------------------------------------------------------------
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