Nice trick, Howard
I also noticed that using Servlet API could be is easier.
For instance, in some cases I prefer to pass page parameters as simple HTTP
params in URL, without using page context, and use Request instance to get
them in onActivate.
On Mon, Mar 29, 2010 at 20:45, Howard Lewis Ship <hls...@gmail.com> wrote:
> On Mon, Mar 29, 2010 at 9:14 AM, Thiago H. de Paula Figueiredo
> <thiag...@gmail.com> wrote:
> > On Mon, 29 Mar 2010 13:10:15 -0300, jaques robert
> > <mondes_englou...@yahoo.fr> wrote:
> >
> >> Hello,
> >
> > Hi!
> >
> >> I've tried this code which present 10 checkbox which I submit. Then I go
> >> back to this page so I'd like those checkbox to be ticked if they were
> >> ticked before.
> >>
> >> <t:Loop source="1..10" value="index">
> >> <input t:type="checkbox" t:id="pute" />
> >> </t:Loop>
> >>
> >> So in my class I've coded :
> >> @Persist
> >> @Property
> >> private boolean _pute;
> >
> > You should have a list of booleans, not a single one.
>
> To amplify here, Tapestry is doing what you told it to. It renders 10
> checkboxes, each of which draws its initial value from the _pute field
> (and pute property).
>
> On submit, it does the exact same thing: reads the query parameter for
> each checkbox (they get rendered with unique name attributes) and
> updates the pute property. However, since there's 10 checkboxes and
> only one property, it ends up with the 10th checkbox's value.
>
> I teach, in my labs, a way to use a synthetic property to populate a
> Set with value selected by checkboxes .... but you could just as
> easily use ordinary HTML <input type="checkbox">, assign your own name
> and use a value (typically a database persistent entity id) of your
> own devising:
>
> <t:loop source="databaseObjects" value="object">
> <input type="checkbox" name="selectedObjects" value="${object.id}"/>
> ...
> </t:loop>
>
> And then in your onSuccess() and/or onValidate() event handler
> method, you can inject the Request get get the selectedObjects query
> parameter value.
>
> I call this "dropping down to Servlets mode" and it is appropriate in
> cases where a full-bore Tapestry component solution is more work.
>
> >
> >
> >> private Object onSuccess() {
> >> // call database update
> >> return this;
> >> }
> >
> > Return null instead.
> >
> > --
> > Thiago H. de Paula Figueiredo
> > Independent Java, Apache Tapestry 5 and Hibernate consultant, developer,
> and
> > instructor
> > Owner, software architect and developer, Ars Machina Tecnologia da
> > Informação Ltda.
> > http://www.arsmachina.com.br
> >
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> >
> >
>
>
>
> --
> Howard M. Lewis Ship
>
> Creator of Apache Tapestry
>
> The source for Tapestry training, mentoring and support. Contact me to
> learn how I can get you up and productive in Tapestry fast!
>
> (971) 678-5210
> http://howardlewisship.com
>
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>
--
Dmitry Gusev
AnjLab Team
http://anjlab.com
