Hi all,
I'm using tapestry for some time but for first time I cannot find correct
solution by myself. My problem is with validation in onValidate method. I
get that onValidate is called for every component inside form and
onValidateForm is called after all other onValidates but I don't get why
first Tapestery generates validate event and only after that it calls setter
method for validated property.
As I always could call onValidateForm, then it wasn't such a problem, but
currently I need to do validation from inside of component. Structure is
following: Page contains form and component which is just a part of that
form. Component contains just a textarea, so validateForm method is not
called. IMHO onValidateFromMyField method should do the job but inside I
always get null. About year ago I was putting hidden field inside the form,
but it's wasn't the solution and it definitely wasn't reliable. I always
could find some simple workaround, but now the only solution that I see, is
to make whole validation inside page validateForm method, what would result
in violation of DRY principle (b/c I would have to do same trick in every
page that uses my component). Project in which I have this problem is
relatively small, so I could implement this workaround, but everything in me
opose to do that (because of the smell it would left, and feeling that some
day it won't be a small project).
As my english is not the best I prepared small example which should be more
expressive than my explanation.
1. Page class
@Property
@Persist
private String foo;
@Property
@Persist
private String bar;
@Inject
private Logger log;
@Inject
private ComponentResources resources;
@Log
public void onValidateForm() throws ValidationException {
log.debug("--------------------------------------------------------");
log.debug("foo '{}', bar '{}'", foo, bar);
}
@Log
void onSuccess() {
resources.discardPersistentFieldChanges();
}
2. tml file for that page
<form t:type="form" t:id="foobar">
<t:textfield value="foo"/>
<t:textfield value="bar"/>
<t:comp/>
<t:submit value="save"/>
</form>
3. component code
@Inject
private Logger log;
@Persist
private String password;
@Log
void onValidateFromPasswordComponent() throws
ValidationException {
log.debug("Password '{}'", password);
// do validation, if goes wrong throw new
// ValidationException(recordedError);
}
@Log
void onValidate() throws ValidationException {
log.debug("Password '{}'", password);
// do validation, if goes wrong throw new
// ValidationException(recordedError);
}
@Log
public void setPassword(String password) {
this.password = password;
}
@Log
public String getPassword() {
return password;
}
<html
xmlns:t="http://tapestry.apache.org/schema/tapestry_5_1_0.xsd";
xmlns:p="tapestry:parameter">
<t:content>
<t:textfield t:id="passwordComponent"
value="password"/>
</t:content>
</html>
4. Log from submit. Values inputed into fields were a, b, c:
[DEBUG] components.Comp [ENTER] onValidate()
[DEBUG] components.Comp Password 'null'
[DEBUG] components.Comp [ EXIT] onValidate
[DEBUG] components.Comp [ENTER] onValidateFromPasswordComponent()
[DEBUG] components.Comp Password 'null'
[DEBUG] components.Comp [ EXIT] onValidateFromPasswordComponent
[DEBUG] components.Comp [ENTER] setPassword("c")
[DEBUG] components.Comp [ EXIT] setPassword
[DEBUG] pages.About [ENTER] onValidateForm()
[DEBUG] pages.About --------------------------------------------------------
[DEBUG] pages.About foo 'a', bar 'b'
[DEBUG] pages.About [ EXIT] onValidateForm
[DEBUG] pages.About [ENTER] onSuccess()
[DEBUG] pages.About [ EXIT] onSuccess
IMHO it is bug or really counterintuitive feature. How I am supposed to do
validation when value is always null?
Please help, I really want to do this properly.
Regards
Michał Gruca
--
View this message in context:
http://tapestry-users.832.n2.nabble.com/Validation-in-component-using-onValidate-method-tp5315887p5315887.html
Sent from the Tapestry Users mailing list archive at Nabble.com.
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org
For additional commands, e-mail: users-h...@tapestry.apache.org
