[jira] Commented: (TAP5-1235) The interaction between a Form component and the active page can be problematic when there is an error loading a page

["Igor Drobiazko (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/TAP5-1235?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12895777#action_12895777 ] 

Igor Drobiazko commented on TAP5-1235:
--------------------------------------

This issue is related to TAP5-1234

> The interaction between a Form component and the active page can be problematic when there is an error loading a page
> ---------------------------------------------------------------------------------------------------------------------
>
>                 Key: TAP5-1235
>                 URL: https://issues.apache.org/jira/browse/TAP5-1235
>             Project: Tapestry 5
>          Issue Type: Bug
>          Components: tapestry-core
>    Affects Versions: 5.2.0
>            Reporter: Howard M. Lewis Ship
>
> This only occurs when there's an overridden ExceptionReport page, and it contains a Form. Presumably, an app that redirects to another application page instead of ExceptionReport could also be affected.
> Form uses RequestGlobals.activePageName to fire an event on the active page; in an error, that is often the page that could not be loaded. This results in another exception and a 500 response to the user. Very hard to track down.
> This could be solved by changing some code to update the active page name just as the response starts to render; this would ensure that the Form is able to communicate with the correct (rendering) page.
> Also, the Form should be more capable of dealing with no active page (RequestGlobals.activePageName is null).

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