Thanks for your comments, guys.
Benny
On Mon, Oct 19, 2009 at 7:39 PM, Howard Lewis Ship <hls...@gmail.com> wrote:
> This is actually a challenge in Tapestry. In effect, the component
> abstraction does get in the way of any kind of intra-field dependency,
> including validation. In simpler systems, you can create an
> "engineered coincidence" for these types of relationships ("the city
> field is required if a country is selected" is easier to implement if
> you have orchestrated that the client id and control names are "city"
> and "country" and directly connect to the "city" and "country"
> properties of the data object). In Tapestry, a single form can
> reasonably edit many different data objects, and especially with loops
> and/or Ajax in the mix, the control names and client ids may vary
> wildly (including extra numbers to ensure that they are unique).
>
> I don't have a specific plan to address this; it may be something that
> is done less declaratively (using @Validate) and more imperatively (a
> set of utilities for generating the necessary client- and server-side
> validations).
>
> On Mon, Oct 19, 2009 at 2:57 PM, Ulrich Stärk <u...@spielviel.de> wrote:
> > You can make form fields conditionally visible using the if or
> formfragment
> > components. Apart from that, manually performing validation in the
> > corresponding onValidate event handler method is the way to go.
> >
> > Uli
> >
> > Am 19.10.2009 23:10 schrieb Benny Law:
> >>
> >> Hi everyone,
> >>
> >> I have a form with a field that is required only when certain conditions
> >> are
> >> true, so I can't use validator="required" in the template. What is the
> >> best
> >> way to handle this? I would rather not do it in onValidateForm because
> >> that
> >> will require a duplicate error message to be provided (one that is
> already
> >> provided by the required validator). Is there a way to dynamically add
> >> validators to a field when a form is submitted before validations are
> >> performed? I am using T5.1. Thanks.
> >>
> >> Benny Law
> >>
> >
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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!
>
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>
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