Use "flash" persistence on Form's ValidationTracker
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Key: TAPESTRY-2354
URL: https://issues.apache.org/jira/browse/TAPESTRY-2354
Project: Tapestry
Issue Type: Improvement
Affects Versions: 5.0.11
Reporter: Geoff Callender
Currently, a Form's ValidationTracker inherits the default persistence
strategy. The result is that by default the session becomes littered with
ValidationTrackerImpl objects as you move from page to page.
In response to this problem there have been several workarounds proposed in the
mailing lists. They all involve making the ValidationTracker use "flash"
persistence.
Consequently, I'm proposing that we make "flash" the default for Form's
ValidationTracker so we can all forget about it. After all, it would be very
unusual to want a form's validation errors to be retained after the form has
been displayed, regardless of what persistence strategy makes sense for any
other component of the form.
If there remains a situation in which it makes sense to override it, then
perhaps that could be possible through a new parameter of the Form component.
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