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https://issues.apache.org/jira/browse/TAP5-1808?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13405026#comment-13405026
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Geoff Callender commented on TAP5-1808:
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Does this mean that the browser will show the URL of the submit?
> Change Form to (by default) immediately render markup when there are
> validation errors, to avoid creating the session
> ---------------------------------------------------------------------------------------------------------------------
>
> Key: TAP5-1808
> URL: https://issues.apache.org/jira/browse/TAP5-1808
> Project: Tapestry 5
> Issue Type: Improvement
> Components: tapestry-core
> Affects Versions: 5.3, 5.4
> Reporter: Howard M. Lewis Ship
> Assignee: Howard M. Lewis Ship
> Labels: form, redirect-after-action
> Fix For: 5.4
>
>
> Historically, Tapestry has needed to keep an instance of ValidationTracker in
> the session between a form submit and a page re-render, to track user input
> and input errors; this often means that it is necessary to create the
> HttpSession just to store this transient value. Tapestry 5.2 went through
> some contusions to avoid creating the persistent ValidationTracker instance
> until there were actual errors, to avoid creating the session.
> A better approach is to treat successful and failed form submits differently,
> at least by default. For failed form submits, where the default is to
> re-render the active page, the Form component could instead immediately
> re-render the page. The ValidationTracker instance would not ever have to be
> persistent at that point.
> In this way, failed form submissions would be treated somewhat like requests
> with unhandled exceptions: markup is streamed to the client web browser even
> during a component event request.
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