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https://issues.apache.org/jira/browse/TAP5-2774?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Maximillian Steinbach updated TAP5-2774:
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Attachment: Test.tml
> Form in form error when forms are not inside one another.
> ---------------------------------------------------------
>
> Key: TAP5-2774
> URL: https://issues.apache.org/jira/browse/TAP5-2774
> Project: Tapestry 5
> Issue Type: Bug
> Components: tapestry-core
> Affects Versions: 5.8.2
> Reporter: Maximillian Steinbach
> Assignee: Ben Weidig
> Priority: Critical
> Attachments: Test.java, Test.tml
>
>
> I have t:form (form A) with an onSubmit action. This form's submit action
> triggers an ajax reload. The part of the page that is being reloaded is
> different to that of form A. The area being reloaded contains another t:form
> (form B) that must be re-rendered. While it is re-rendering form B it hits an
> exception at
> org.apache.tapestry5.corelib.components.Form.setupRender(Form.java:330)
> The error is "Form components may not be placed inside other Form
> components."
> It seems that there is a check here to see if there is an existing outer
> enclosing form in the process of being rendered. However the existing form it
> finds is the form A that is not an enclosing form, it is the form that
> triggers the submit action. Form A seems to be pushed into the environment on
> line 503 in the method onAction.
> I have taken a look at the git history here and there doesn't seems to have
> been any recent changes to this code so I am confused why this issue has
> begun on my end.
> As such, the result of this bug seems to be that a form's onSubmit action can
> never trigger the reload of another component that itself contains a form.
> This seems to be problematic.
> I can take a look at addressing this issue myself but I would appreciate
> other's more experienced input first before I attempt it.
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