Hmm, it happens automatically, a validator can register errors.. Like this:
form.add(new TextField<String>("email",new
PropertyModel<String>(form.getModel(),"email")).add(
EmailAddressValidator.getInstance()).add(new
IValidator() {
public void validate(IValidatable validatable) {
String string = (String) validatable.getValue();
if (userRepository.areEmailThere(string)) {
validatable.error(new
ValidationError().addMessageKey(
"error.unique").setVariable("email",
validatable.getValue()));
}
}
}));
form.add(new CheckBox("agree", new Model<Boolean>(false))
.add(new IValidator<Boolean>() {
public void
validate(IValidatable<Boolean> validatable) {
Boolean agree =
validatable.getValue();
if (!agree) {
validatable.error(new
ValidationError()
.addMessageKey("error.mustagree"));
}
}
}));
And then just in your ajax add the error message panel to the
response.. Works just fine... Or is it something more you want?
2009/4/21 Tauren Mills <[email protected]>:
> On a site registration form, I have three validators on the username
> field. One tests to make sure the username is at least 3 characters
> long, another one checks to make sure it uses valid characters, and
> the last one checks if the username is already taken. This all works
> fine.
>
> Now I'm working on adding an ajax behavior to the field so that as the
> user types, validation happens in real time. There is a label called
> "valid" that should change to contain on of the following messages, as
> appropriate based on the success/failure of the validation:
>
> You have entered a username that is too short.
> You have entered a username with invalid characters.
> You have entered a username that is already taken.
> Your username is available!
>
> The problem is, I don't know how to determine which of the validators
> in the CompoundValidator have failed. Is this possible to determine?
> How should my AjaxUsernameBehavior know which message to display?
>
> Here is some preliminary code:
>
> RequiredTextField userName = new
> RequiredTextField("username",new PropertyModel(user,"username"));
>
> CompoundValidator validators = new CompoundValidator();
> validators.add(StringValidator.minimumLength(3));
> validators.add(new
> PatternValidator("[_A-Za-z0-9-]*",Pattern.CASE_INSENSITIVE));
> validators.add(new UsernameValidator());
> userName.add(validators);
>
> AjaxFormComponentUpdatingBehavior usernameBehavior = new
> AjaxUsernameBehavior("onkeyup", validators, valid);
> usernameBehavior.setThrottleDelay(Duration.ONE_SECOND);
> userName.add(usernameBehavior);
> add(userName);
>
> Label valid = new Label("valid","");
> valid.setOutputMarkupId(true);
> add(valid);
>
> I haven't implemented AjaxUsernameBehavior yet, thus no code. But I'm
> thinking I'll need to provide it with the validators and the component
> to update ("valid").
>
> Thanks in advance for any ideas!
> Tauren
>
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