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From "Howard M. Lewis Ship (JIRA)" <j...@apache.org>
Subject [jira] Commented: (TAP5-1401) 5.2.4 Form's getDefaultTracker() incompatible with 5.1.0.5
Date Tue, 04 Jan 2011 17:40:49 GMT

    [ https://issues.apache.org/jira/browse/TAP5-1401?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12977371#action_12977371
] 

Howard M. Lewis Ship commented on TAP5-1401:
--------------------------------------------

Darn this grey area.

Form implements FormValidationControl; if you want to know if a Form has any errors, just
invoke getHasErrors() directly on the Form.  You should not need to invoke getDefaultTracker().

> 5.2.4 Form's getDefaultTracker() incompatible with 5.1.0.5
> ----------------------------------------------------------
>
>                 Key: TAP5-1401
>                 URL: https://issues.apache.org/jira/browse/TAP5-1401
>             Project: Tapestry 5
>          Issue Type: Bug
>          Components: documentation, tapestry-core
>    Affects Versions: 5.2.4
>            Reporter: Michael Gentry
>            Priority: Minor
>
> In Tapestry 5.1.0.5, you can have code such as:
> @Component
> private Form inputs;
> ...
> if (inputs.getDefaultTracker().getHasErrors())
> ...
> This fails in 5.2.4 because getDefaultTracker() returns null if there are no errors.
 This appears to be related to this closed bug:
> https://issues.apache.org/jira/browse/TAP5-979
> Perhaps getDefaultTracker() should check for a null and return an empty one to be backwards
compatible with 5.1.0.5?  Alternatively, document it as a known incompatibility in the release
notes.

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