No you're right. This is something I recently discovered as
well....Unfortunately you'll have to also give it a "translator" binding. I
think int(integer?) is one.
On 12/26/05, Paul Cantrell <[EMAIL PROTECTED]> wrote:
>
> I have a text field in a form, and I want to make sure that the user
> enters a positive integer into it. I'm utterly befuddled about how to
> accomplish this in a tidy way using Tapestry's new validation system.
>
> Here's my component:
>
> @Component(
> type="TextField", id="bookQuantity",
> bindings = { "value=ognl:bookQuantity",
> "validators=validators:min=1" } )
> public abstract TextField getBookQuantityComponent();
> public abstract Integer getBookQuantity();
> public abstract void setBookQuantity(Integer value);
>
> If I type a value into this field, I get a ClassCastException at
> Min.java:53:
>
> Number value = (Number) object;
>
> The object that's being passed in is a string. Clearly the "min"
> validator expects a number to be passed in, but I don't see where my
> string is going to be converted to a number.
>
> The documentation is kind of broken on this front. The TextField docs
> tell me:
>
> "A TextField may be decorated by the Form's validation delegate,
> but
> does not have a validator, so is limited in editting properties
> types
> beyond string. In most cases, the ValidField component is
> preferred."
>
> And the ValidField docs tell me (under a big red "WARNING" heading):
>
> "This component has been deprecated; Tapestry 4.0 adds even better
> support for validation to TextField, TextArea and most other for
> element component."
>
> Lovely. The example on the page about validators shows an email
> address, which is of course a string.
>
> I'm sure that this made sense to someone at some point, but that
> person is not me. Surely I'm missing something obvious...?
>
> Cheers,
>
> Paul
>
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