Re: Cannot clear validation errors when form onSuccess returns a StreamResponse

It looks better than mine, actually, since you're using JavaScriptSupport.
:)

On Mon, Sep 4, 2017 at 10:10 AM, Svein-Erik Løken <[email protected]> wrote:

> Thanks!
>
> I was able to make this work. Do you think my solution is too complex
> Thiago?
>
>
> /external/TrackSegmentsExport (the form):
> ==========================================
>
> @Persist(PersistenceConstants.FLASH)
> boolean download;
>
> @AfterRender
> void afterRender() {
>     if (download) {
>         javaScriptSupport.require("util/util").invoke("
> windowLocation").with("/external/TrackSegmentsExportDownload");
>     }
> }
>
> Object onSuccessFromTrackExpForm() throws ParserConfigurationException,
> JAXBException, TransformerException, IOException {
>     download = true;
>     return null;
> }
>
>
>
> Utils.js:
> ==========================================
> Util.windowLocation = function (href) {
>     window.location = href;
> };
>
>
>
> /external/TrackSegmentsExportDownload:
> ==========================================
>
> StreamResponse onActivate() {
> ...
> return new AttachmentStreamResponse(stream, "TrackSegmentsExport.gpx");
>
>
>
>
>
>
> From: Thiago H de Paula Figueiredo [via Apache Tapestry Mailing List
> Archives] [mailto:[email protected]]
> Sent: mandag 4. september 2017 13:48
> To: Svein-Erik Løken <[email protected]>
> Subject: Re: Cannot clear validation errors when form onSuccess returns a
> StreamResponse
>
> Hi!
>
> This is due to HTTP, not Tapestry itself: you cannot have two different
> responses to the same request. So, you either rerender the page to clear
> the errors (which calling form.clearErrors() is actually doing, even if you
> cannot see the results) or returns a binary download (StreamResponse), but
> not both.
>
> You'll need to write some JavaScript for that, so either the form
> submission or the file download request is done through JavaScript. Maybe
> the easiest solution, even if not pretty, is to return null in onSuccess(),
> rendering a <script> tag with a window.location = [URL which triggers the
> download] statement.
>
> On Mon, Sep 4, 2017 at 4:41 AM, Svein-Erik Løken </user/SendEmail.jtp?type=node&node=5733608&i=0>
> wrote:
>
> > If I record an error for my <t:palette> I cannot find out how to clear
> > errors (tried form.clearErrors()).
> >
> > Because onSuccess returns a StreamResponse to download a file the form
> > need to have async="false"
> >
> > The form should stay open so user can download several files with
> > different parameters.
> >
> > Can anyone help!
> >
> > S-E
> >
>
>
>
> --
> Thiago
>
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-- 
Thiago