Ivano,
I'm pretty sure what you want to do is provide an onValidate method in
your page class. That method gets called expressly for doing more
complicated validation. If you have more than one form, you'll have to
further specify it e.g. onValidateFromMyFormName (or use @OnEvent
annotation). Here's some abbreviated code:
@InjectComponent("fielda")
private TextField fieldaComponent;
@InjectComponent
private Form formComponent;
...
Object onValidate() {
If (fielda == null)
formComponent.recordError(fieldaComponent, "Example error
message for fielda");
if (fielda=="") && (fieldb=="" || fieldc=="")
throw new RuntimeException();
return null; // this will keep you on the same page
// return NewPage.class; // this will goto the NewPage page, etc.
etc.
}
You may just want to provide a validation message. I've shown an
example using fielda in the preceding code.
Read the docs on the Form component, and see the examples in the user
guide.
Cheers
-----Original Message-----
From: Ivano Luberti [mailto:lube...@archicoop.it]
Sent: Monday, March 09, 2009 8:30 AM
To: Tapestry users
Subject: cross field validation with empty fields
Sorry to ask for this again, but I have seen no answer.
I will get no answer again I will stop asking for this, of course.
TIA
----------------
Hello, we are using T4.1
We have to validate a form and we don't want to do it client side.
Let say we have three text fields.
The validation should implement the following rule:
if (fielda="") && (fieldb="" || fieldc="")
then throw new Exception("");
The problem is that we cannot link the validation to neither field
because they can be empty and the custom validator we are trying to
implement is nevere called if the field is empty.
We tried to follow the Identity validator but it is also not called
when the field to which is associated is empty.
Is there another way to accomplish cross field validation ?
It seems to us that in T4.1 lacks a validator attribute for the form
component.
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