Thanks Josh!
You helped me identify that it was an encoder issue on my end.
I appreciate your help. :)
Cheers,
Levi
Josh Canfield wrote:
>
> 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:
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>>>>
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>>>>
>>>
>>>
>>>
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>>>
>>
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>
>
>
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