and wat is line 41 in ur spec ?
From: Chris Chiappone <[EMAIL PROTECTED]>
Reply-To: Chris Chiappone <[EMAIL PROTECTED]>
To: Tapestry users <[email protected]>
Subject: Re: Confused with pageBeginRender and Form submission
Date: Fri, 15 Jul 2005 20:49:26 +0000
Thanks for the quick responses. The two responses I got were
basically the same so I tried it. The problem is now I get:
binding: ExpressionBinding[EditApp appInfo.name]
location: context:/WEB-INF/EditApp.page, line 41, column 58
ognl.OgnlException
source is null for getProperty(null, "name")
So I am still a bit stuck on what I should do.
On 7/15/05, Danny Mandel <[EMAIL PROTECTED]> wrote:
> In your pageBeginRender method you can check to see if the form is
> rewinding. If it is, you probably don't want to initialize things in
> there i.e.:
>
> public void pageBeginRender(PageEvent event) {
> if (!event.getRequestCycle().isRewinding()) {
> // do your normal initialization stuff and create if null
> }
> }
>
> In the case where it is rewinding, then you'll want to move your object
> retrieval/restoration to a different place. This can be done by binding
> your object's id to a hidden field that will fetch it or by use of a
> data squeezer. This has been addressed many times on this list so it
> should be in the archives and I know that there is a wiki page on using
> a data squeezer to do this sort of thing:
>
> http://wiki.apache.org/jakarta-tapestry/DataSqueezer
>
> Hope that helps,
> Danny
>
> Chris Chiappone wrote:
>
> >I am a bit confused about how pageBeginRender works during a form
> >submission Here is the code i have:
> >
> > public void pageBeginRender(PageEvent event) {
> > // initialize app
> > retrieveApp(getAppVerId());
> > }
> >
> > private void retrieveApp(Long id){
> > if(id != null){
> > System.out.println("Updating App: "+ id);
> > AppDAO dao = new AppDAO();
> > AppVer ver = null;
> > AppInfo info = null;
> > ver = dao.getAppVerId(id, false);
> > info = ver.getAppInfo();
> > setAppInfo(info);
> > setAppVer(ver);
> > }
> > if(getAppInfo() == null){
> > System.out.println("Creating a new
application");
> > setAppInfo(new AppInfo());
> > setAppVer(new AppVer());
> > getAppVer().setRegdate(new Date());
> > }
> > }
> >
> > /**
> > * Action taken when this form has been submitted
> > *
> > * @param cycle
> > */
> > public void formSubmit(IRequestCycle cycle){
> > System.out.println("Current VerId = "+ getAppVerId());
> > // Check to see all validation was a success
> > ValidationDelegate delegate =
> >(ValidationDelegate)getBeans().getBean("delegate");
> >
> > if(!delegate.getHasErrors()){
> > // Insert the new version
> > AppDAO dao = new AppDAO();
> > AppInfo info = getAppInfo();
> > AppVer ver = getAppVer();
> >
> >....
> >
> >Basically I need to initialize the AppInfo and AppVer objects when the
> >page is rendered. The page is an add/edit form. If appVerId is not
> >null I lookup AppInfo and AppVer to populate my form for editing, if
> >null create new objects. This seems to work fine. THe problem I am
> >having is that when I submit the form It create a new AppVer and
> >AppInfo because appVerId appears to be null in pageBeginRender(Event)
> >but when it continues to formSubmit my print is showing the the
> >appVerId != null which is what I expect. The problem is the objects
> >have been intialized as new so it ends up creating duplicates. Hope I
> >made this clear.
> >
> >
> >
>
>
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>
>
--
~chris
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