@Inject
private FieldValidatorSource source;
@InjectComponent
private Field yourField;
public FieldValidator getDynamicConstraints() {
return source.createValidators(yourField, "required", null);
}
Note that this is how we generally use Tapestry Services by injecting them.
Have a look at the API, it is pretty detailed on how to use methods on
services. Also, keep in mind that there are two types of services : public
(for tapestry users) and internal (for tapestry developers) So if you're
looking at something, have a first look into the
'org.apache.tapestry5.services' package, you should find what you need ;)
Regards,
Christophe Cordenier.
2010/3/18 Jagadesh Paladugula <jagadeshpaladug...@gmail.com>
> Hi Christophe,
>
> Could you please give me a sample implementation.
>
> Regards,
> Jagadesh
>
> On Thu, Mar 18, 2010 at 12:39 PM, Christophe Cordenier <
> christophe.corden...@gmail.com> wrote:
>
> > Hi
> >
> > Try with fielvalidtorsource service to build your conditional
> constraints.
> >
> > Regards
> > Christophe cordenier
> >
> > Le 18 mars 2010 à 06:59, Jagadesh Paladugula <
> jagadeshpaladug...@gmail.com>
> > a écrit :
> >
> >
> > Hi Everyone,
> >>
> >> I have a form which is getting generated dynamically based on some
> values
> >> in
> >> database. I want to add validation for a text box based on some
> condition.
> >>
> >> I tried doing some thing like this
> >>
> >> <t:textfield t:validate="*${validator}*"></t:textfield>
> >>
> >> and added the below method in respective java file
> >>
> >> public String getValidator(){
> >> if(test for validation condition){
> >> return "required";
> >> }else{
> >> return "";
> >> }
> >> }
> >>
> >> I am getting some exception saying *"Could not find a coercion from type
> >> java.lang.String to type org.apache.tapestry5.FieldValidator."*
> >>
> >> From the exception, I understood that it is expecting FieldValidator,
> but
> >> I
> >> am not getting how to initalize a *"required" FieldValidator* and return
> >> it.
> >>
> >> I have one more fix (which I didn't like)
> >> <t:if test="test for validation">
> >> <t:textfield t:validate="*${validator}*"></t:textfield>
> >> <t:parameter name="else">
> >> <t:textfield></t:textfield>
> >> </t:parameter>
> >> </t:if>
> >>
> >>
> >> Please Let me know, if there is a way to initalize a FieldValidator.
> >>
> >> --
> >> Thanks & Regards
> >> Jagadesh
> >>
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org
> > For additional commands, e-mail: users-h...@tapestry.apache.org
> >
> >
>
>
> --
> Regards
> Jagadesh
>
--
Regards,
Christophe Cordenier.
Developer of wooki @wookicentral.com
