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https://issues.apache.org/jira/browse/TAP5-182?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12658726#action_12658726
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Howard M. Lewis Ship commented on TAP5-182:
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Workaround; implement your logic inside the validateForm event handler.
Returning a navigational result (page class, page instance, etc.) will bypass
the success, failure and submit event handlers (including the logic which
clears the ValidationTracker).
> ValidationTracker input values should not be cleared before "success" event
> ---------------------------------------------------------------------------
>
> Key: TAP5-182
> URL: https://issues.apache.org/jira/browse/TAP5-182
> Project: Tapestry 5
> Issue Type: Improvement
> Affects Versions: 5.0.15
> Reporter: Vjeran Marcinko
> Assignee: Howard M. Lewis Ship
>
> As far as I understand, "success" handler is used to call business method
> after all input values have been successfuly validated. Unfortunately,
> ValidationTracker's input values are cleared prior to this "success" event,
> and two cases come to my mind when this is undesirable, both of which are
> rendering same form page after submit.
> 1. Some validation cannot be executed prior to calling business method and
> checked exceptions are thrown when action fails. These failures have to be
> caught inside "success" handler and user should stay on same form page
> displaying error message. Naturally, all input values should be displayed.
> 2. Input validation passed successfuly, but user wants to stay on same page -
> eg. displaying search results below search form. It is usually needed to see
> all those input values still there to let user know what search criteria he
> just entered.
> My suggestion is to not clear input values ever. If user leaves the form
> page, input values will get lost then, since ValidationTracker has "flash"
> persistance strategy, so it's all good in that case. In some rare cases where
> user wants to stay on same form page, but clear those input values, he should
> do it explicitly by calling some ValidationTracker.clear() method or such.
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