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From Sandeep Takhar <sandeep_tak...@yahoo.com>
Subject Re: checkboxes - ActionForm in session scope
Date Wed, 16 Jul 2003 12:58:33 GMT
http doesn't send values for checkboxes when they are
not set.

reset() method is used for just this thing (on your
actionForm)

sandeep
--- "Khalid K." <groups@maikada.com> wrote:
> Hello All,
> 
> I have the following problem, and any help is
> greatly appreciated:
> 
> 1. html form that has a checkbox which is associated
> with a Action Form
> Bean - boolean attribute
> 2. ActionForm is in session scope
> 3. I call reset method selectively since I am trying
> to develope wizard
> style pages with one form.
> 4. using struts 1.0.2
> 
> problem:
> 
>   When I check a checkbox and submit the form, on
> the "pending" page, I see
> the value as set to "true" which is OK.
> 
> Now, When I click on "modify" which takes me to the
> html with the form, and
> I uncheck the checkbox and submit again....the value
> on the "pending" page
> is still set to TRUE. Which it should be set to
> FALSE.  any ideas ??
> 
> Khalid
> ----- Original Message -----
> From: "John M. Corro" <john.corro@cornerstone.net>
> To: <struts-user@jakarta.apache.org>
> Sent: Tuesday, July 15, 2003 10:48 AM
> Subject: Re: Is this really the best way to handle
> this problem
> 
> 
> > I've seen two ways of dealing w/ this problem,
> both of which I see as
> 'hackish'
> > in nature.
> >
> > Solution A:
> >
> > In your getters/setters you implement the
> following code
> >
> > public MyCustomBean getMyCustomBean(int index) {
> >    while(index >= myCustomBeanList.size()) {
> >       myCustomBeanList.add(new MyCustomBean());
> >    }
> >    return
> (MyCustomBean)myCustomBeanList.get(index);
> > }
> >
> > In that way you'll never encounter the common
> IndexOutOfBoundsException.
> The
> > problem here is that you tend to use alot of
> hidden fields in your UI to
> repopulate
> > the data back into the dynamically created beans.
> >
> > Solution B:
> >
> > In your reset() method you repopulate your
> internal Collection of beans.
> The
> > problem w/ this approach is that often times you
> have a separate Action
> that
> > prepopulates your ActionForm.  This provides for
> good separation - the
> Action
> > is a retriever of a data (nothing more) and the
> ActionForm is merely a
> container
> > for data (nothing more).  With this approach your
> ActionForm suddenly
> starts
> > becoming more intelligent than it really should
> be.  Now it's aware of how
> to
> > populate itself...not a good thing IMO.
> >
> > I'd be very interested in hearing other solutions
> to this problem as I
> find
> > both of the above solutions cumbersome and hackish
> and would love to stop
> implementing
> > them.
> >
> > >I've been struggling with a problem similar to
> the one described (and
> > >solved) at
> >
>
>http://www.mail-archive.com/struts-user@jakarta.apache.org/msg50901.html
> .
> >
> > >Is this really the recommended way to solve
> population / repopulation of
> > >properties stored in a List() of
> > >whatever-data-object-i-need-in-the-form-of-a-bean
> ? Is there a better way
> to
> >
> > >acheive the same result ? (I.e represent a
> collection in a form)
> > >
> > >I've read that a practice often used to represent
> collections (a DB-table
> > >for intstance) is to make a bean that has getters
> / setters for the
> > >properties of a single row and then have the
> ActionForm contain a List()
> of
> >
> > >those beans. One for every row  (in the
> DB-example). That far I can
> follow,
> >
> > >and see how / why. But is there no better way to
> update the values in the
> > >ActionForm (beans) when the data is submitted
> than in the URL above ?
> > >
> > >//Linus Nikander - linus@nikander.net
> > >
> > >
> > >
> > >
> >
>
>---------------------------------------------------------------------
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> > >For additional commands, e-mail:
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> > >
> > >
> >
> >
> >
> > John M. Corro
> > Cornerstone Consulting
> >
> >
>
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> >
> >
> >
> 
> 
>
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