The only change I made was making isValid into a property and a
checkbox in the form so I could switch between behaviors.
Here is the complete code that works for me.
public class Index {
@Component
private Zone nothingSelectedZone;
@Component
private Form _parts;
@Property
private boolean errorVisible;
@Property
private boolean resultsVisible = true;
@Property
private boolean _valid;
@InjectPage
private LoopedForm otherPage; // a random page I have in my
experiments project.
void onValidateFormFromParts() {
if (_valid) {
_parts.recordError("No items selected.");
} else {
resultsVisible = true;
_parts.clearErrors();
}
errorVisible = _parts.getHasErrors();
}
Object onSuccessFromParts() {
return otherPage;
}
Object onFailureFromParts() {
return nothingSelectedZone.getBody();
}
}
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html
PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd";>
<html xmlns:t="http://tapestry.apache.org/schema/tapestry_5_0_0.xsd";
xmlns="http://www.w3.org/1999/xhtml";
xml:lang="en"
lang="en">
<head>
<title>Experiment Home</title>
</head>
<body>
<t:zone t:id="nothingSelectedZone" id="nothingSelectedZone"
visible="${errorVisible}">
No items have been selected.
</t:zone>
<t:zone t:id="resultsZone" id="resultsZone" visible="${resultsVisible}">
<form t:id="parts" t:zone="nothingSelectedZone">
<t:checkbox value="valid"/>
<input type="button" t:type="submit" value="Do It"/>
</form>
</t:zone>
</body>
</html>
On Fri, Oct 2, 2009 at 6:03 PM, xfile80303 <l...@grokers.net> wrote:
>
> Hi Josh,
>
> Thanks for looking.
>
> I'm afraid the stack trace I provided is a red herring and does not have any
> bearing on the situation. It comes from the fact that my encoder was
> getting purged from the session due to it being set as FLASH only. And this
> exception actually only happens after I changed the code from:
>
> <form t:id="parts" t:zone="nothingSelectedZone">
> to
> <form t:id="parts" t:zone="resultsZone">
>
> which actually works... it's as if something in the form needs to be rebuilt
> after the submit.
>
> You say you were able to get my code to work? As is, or did you need to make
> changes? I'd still like to have the flexibility to refresh the
> nothingSelectedZone and not touch the resultsZone.
>
> Cheers,
>
> Levi
>
>
> Josh Canfield wrote:
>>
>> Your example code works fine and the exception you provide makes it
>> look like you're in a loop?
>>
>>> Caused by: java.lang.NullPointerException
>>> at
>>> org.apache.tapestry5.corelib.components.Loop.restoreStateFromStoredClientValue(Loop.java:457)
>>
>> That line from the code:
>> // We assume that if an encoder is available when we rendered,
>> that one will be available
>> // when the form is submitted.
>> Object restoredValue = encoder.toValue(clientValue);
>>
>> Makes me think that you aren't getting an encoder?
>>
>> Can you provide a simple and complete example that breaks?
>> Josh
>>
>> On Fri, Oct 2, 2009 at 4:50 PM, xfile80303 <l...@grokers.net> wrote:
>>>
>>> Okay, I have some more information...
>>>
>>> When I click on the submit button, after the validation error, I see this
>>> in
>>> the log:
>>>
>>> ERROR [http-8080-5: RequestExceptionHandler]: Processing of request
>>> failed
>>> with uncaught exception:
>>> org.apache.tapestry5.runtime.ComponentEventException
>>> org.apache.tapestry5.runtime.ComponentEventException [at
>>> classpath:com/java/dse/cwp/eos/pages/Search.tml, line 106]
>>> at
>>> org.apache.tapestry5.internal.structure.ComponentPageElementImpl.triggerContextEvent(ComponentPageElementImpl.java:1098)
>>> at
>>> org.apache.tapestry5.internal.services.AjaxComponentEventRequestHandler.handle(AjaxComponentEventRequestHandler.java:107)
>>> at
>>> $ComponentEventRequestHandler_12417a4b929.handle($ComponentEventRequestHandler_12417a4b929.java)
>>> at
>>> org.apache.tapestry5.internal.services.AjaxFilter.handle(AjaxFilter.java:42)
>>> at
>>> $ComponentEventRequestHandler_12417a4b92b.handle($ComponentEventRequestHandler_12417a4b92b.java)
>>> at
>>> org.apache.tapestry5.services.TapestryModule$36.handle(TapestryModule.java:2164)
>>> at
>>> $ComponentEventRequestHandler_12417a4b92b.handle($ComponentEventRequestHandler_12417a4b92b.java)
>>> at
>>> $ComponentEventRequestHandler_12417a4b911.handle($ComponentEventRequestHandler_12417a4b911.java)
>>> at
>>> org.apache.tapestry5.internal.services.ComponentRequestHandlerTerminator.handleComponentEvent(ComponentRequestHandlerTerminator.java:43)
>>> at
>>> $ComponentRequestHandler_12417a4b80d.handleComponentEvent($ComponentRequestHandler_12417a4b80d.java)
>>> at
>>> org.apache.tapestry5.internal.services.ComponentEventDispatcher.dispatch(ComponentEventDispatcher.java:46)
>>> at $Dispatcher_12417a4b819.dispatch($Dispatcher_12417a4b819.java)
>>> at $Dispatcher_12417a4b80a.dispatch($Dispatcher_12417a4b80a.java)
>>> at
>>> org.apache.tapestry5.services.TapestryModule$RequestHandlerTerminator.service(TapestryModule.java:245)
>>> at
>>> org.apache.tapestry5.internal.services.RequestErrorFilter.service(RequestErrorFilter.java:26)
>>> at
>>> $RequestHandler_12417a4b80b.service($RequestHandler_12417a4b80b.java)
>>> at
>>> org.apache.tapestry5.services.TapestryModule$4.service(TapestryModule.java:778)
>>> at
>>> $RequestHandler_12417a4b80b.service($RequestHandler_12417a4b80b.java)
>>> at
>>> org.apache.tapestry5.services.TapestryModule$3.service(TapestryModule.java:767)
>>> at
>>> $RequestHandler_12417a4b80b.service($RequestHandler_12417a4b80b.java)
>>> at
>>> org.apache.tapestry5.internal.services.StaticFilesFilter.service(StaticFilesFilter.java:85)
>>> at
>>> $RequestHandler_12417a4b80b.service($RequestHandler_12417a4b80b.java)
>>> at
>>> com.java.dse.cwp.eos.services.EosModule$1.service(EosModule.java:254)
>>> at
>>> $RequestFilter_12417a4b806.service($RequestFilter_12417a4b806.java)
>>> at
>>> $RequestHandler_12417a4b80b.service($RequestHandler_12417a4b80b.java)
>>> at
>>> org.apache.tapestry5.internal.services.CheckForUpdatesFilter$2.invoke(CheckForUpdatesFilter.java:90)
>>> at
>>> org.apache.tapestry5.internal.services.CheckForUpdatesFilter$2.invoke(CheckForUpdatesFilter.java:81)
>>> at
>>> org.apache.tapestry5.ioc.internal.util.ConcurrentBarrier.withRead(ConcurrentBarrier.java:85)
>>> at
>>> org.apache.tapestry5.internal.services.CheckForUpdatesFilter.service(CheckForUpdatesFilter.java:103)
>>> at
>>> $RequestHandler_12417a4b80b.service($RequestHandler_12417a4b80b.java)
>>> at
>>> $RequestHandler_12417a4b800.service($RequestHandler_12417a4b800.java)
>>> at
>>> org.apache.tapestry5.services.TapestryModule$HttpServletRequestHandlerTerminator.service(TapestryModule.java:197)
>>> at
>>> org.apache.tapestry5.internal.gzip.GZipFilter.service(GZipFilter.java:53)
>>> at
>>> $HttpServletRequestHandler_12417a4b802.service($HttpServletRequestHandler_12417a4b802.java)
>>> at
>>> org.apache.tapestry5.internal.services.IgnoredPathsFilter.service(IgnoredPathsFilter.java:62)
>>> at
>>> $HttpServletRequestFilter_12417a4b7ff.service($HttpServletRequestFilter_12417a4b7ff.java)
>>> at
>>> $HttpServletRequestHandler_12417a4b802.service($HttpServletRequestHandler_12417a4b802.java)
>>> at
>>> org.apache.tapestry5.services.TapestryModule$2.service(TapestryModule.java:726)
>>> at
>>> $HttpServletRequestHandler_12417a4b802.service($HttpServletRequestHandler_12417a4b802.java)
>>> at
>>> $HttpServletRequestHandler_12417a4b7fd.service($HttpServletRequestHandler_12417a4b7fd.java)
>>> at
>>> org.apache.tapestry5.TapestryFilter.doFilter(TapestryFilter.java:127)
>>> at
>>> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
>>> at
>>> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
>>> at
>>> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
>>> at
>>> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
>>> at
>>> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
>>> at
>>> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
>>> at
>>> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
>>> at
>>> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
>>> at
>>> org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849)
>>> at
>>> org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
>>> at
>>> org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454)
>>> at java.lang.Thread.run(Thread.java:637)
>>> Caused by: org.apache.tapestry5.ioc.internal.util.TapestryException [at
>>> classpath:com/java/dse/cwp/eos/pages/Search.tml, line 130]
>>> at
>>> org.apache.tapestry5.corelib.components.Form.executeStoredActions(Form.java:495)
>>> at
>>> org.apache.tapestry5.corelib.components.Form._$advised$onAction(Form.java:378)
>>> at
>>> org.apache.tapestry5.corelib.components.Form$onAction$invocation_12417a50156.invokeAdvisedMethod(Form$onAction$invocation_12417a50156.java)
>>> at
>>> org.apache.tapestry5.internal.services.AbstractComponentMethodInvocation.proceed(AbstractComponentMethodInvocation.java:71)
>>> at
>>> org.apache.tapestry5.ioc.internal.services.LoggingAdvice.advise(LoggingAdvice.java:37)
>>> at
>>> org.apache.tapestry5.internal.transform.LogWorker$1.advise(LogWorker.java:54)
>>> at
>>> org.apache.tapestry5.internal.services.AbstractComponentMethodInvocation.proceed(AbstractComponentMethodInvocation.java:80)
>>> at
>>> org.apache.tapestry5.corelib.components.Form.onAction(Form.java)
>>> at
>>> org.apache.tapestry5.corelib.components.Form.dispatchComponentEvent(Form.java)
>>> at
>>> org.apache.tapestry5.internal.structure.ComponentPageElementImpl.dispatchEvent(ComponentPageElementImpl.java:910)
>>> at
>>> org.apache.tapestry5.internal.structure.ComponentPageElementImpl.triggerContextEvent(ComponentPageElementImpl.java:1081)
>>> ... 52 more
>>> Caused by: java.lang.NullPointerException
>>> at
>>> org.apache.tapestry5.corelib.components.Loop.restoreStateFromStoredClientValue(Loop.java:457)
>>> at
>>> org.apache.tapestry5.corelib.components.Loop.access$500(Loop.java:44)
>>> at
>>> org.apache.tapestry5.corelib.components.Loop$RestoreStateFromStoredClientValue.execute(Loop.java:165)
>>> at
>>> org.apache.tapestry5.corelib.components.Loop$RestoreStateFromStoredClientValue.execute(Loop.java:154)
>>> at
>>> org.apache.tapestry5.corelib.components.Form.executeStoredActions(Form.java:480)
>>> ... 62 more
>>>
>>>
>>> I would really appreciate some help understanding why this is broken.
>>>
>>> Thanks,
>>>
>>> Levi
>>>
>>>
>>> xfile80303 wrote:
>>>>
>>>> Hello all,
>>>>
>>>> I'm seing some interesting behavior I hope you can help me sort out.
>>>>
>>>> I have a form which I would like to display an error message (custom)
>>>> should the form validation fail. I'd like to do this via AJAX since the
>>>> contents of the form are created via AJAX and refreshing the page to
>>>> display this error message will lose this context.
>>>>
>>>> So, I have something like this:
>>>>
>>>> <t:zone t:id="nothingSelectedZone" id="nothingSelectedZone"
>>>> visible="${errorVisible}">
>>>> No items have been selected.
>>>> </t:zone>
>>>>
>>>> <t:zone t:id="resultsZone" id="resultsZone" visible="${resultsVisible}">
>>>> <form t:id="parts" t:zone="nothingSelectedZone">
>>>> <input type="button" t:type="submit" value="Do It"/>
>>>> </form>
>>>> </t:zone>
>>>>
>>>> void onValidateFormFromParts()
>>>> {
>>>> if (isValid())
>>>> {
>>>> _parts.recordError("No items selected.");
>>>> }
>>>> else
>>>> {
>>>> _parts.clearErrors();
>>>> }
>>>> errorVisible = _parts.getHasErrors();
>>>> }
>>>>
>>>> Object onSuccessFromParts()
>>>> {
>>>> return otherPage;
>>>> }
>>>>
>>>> Object onFailureFromParts()
>>>> {
>>>> return nothingSelectedZone.getBody();
>>>> }
>>>>
>>>> If there's no error with validation, the success method gets called
>>>> fine,
>>>> and I am redirected to the otherPage.
>>>> If there is an error with validation, the nothingSelectedZone is updated
>>>> and the error message is displayed.
>>>> However, if, after a validation error I try to re-submit the form,
>>>> nothing
>>>> happens at all. I've put breakpoints in my debugger on these three
>>>> methods and they don't get hit in this case. It's as if the form submit
>>>> is not taking place after the initial validation error.
>>>>
>>>> I'd love some input.
>>>>
>>>> Thanks,
>>>>
>>>> Levi
>>>>
>>>>
>>>
>>> --
>>> View this message in context:
>>> http://n2.nabble.com/T5-1-AJAX-Form-Validation-tp3753039p3758403.html
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>>>
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>>>
>>
>>
>>
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>
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>
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