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Posted to commits@wicket.apache.org by "Kamil (JIRA)" <ji...@apache.org> on 2017/08/14 16:01:00 UTC

[jira] [Created] (WICKET-6451) Real Exception while setting model object is hidden

Kamil created WICKET-6451:
-----------------------------

             Summary: Real Exception while setting model object is hidden
                 Key: WICKET-6451
                 URL: https://issues.apache.org/jira/browse/WICKET-6451
             Project: Wicket
          Issue Type: Bug
          Components: wicket
    Affects Versions: 8.0.0-M6
            Reporter: Kamil
         Attachments: showcase-hiddenException.zip

When object returns Collections.unmodifiableSet() it is obvious that model object can not be updated.
But the exception that was thrown causes me to spend hours until I found out that:
{code}
Last cause: Could not convert value: [] to type: java.util.Set. Could not find compatible converter.
WicketMessage: An error occurred while trying to set the collection attached to [BootstrapMultiSelect [Component id = children]]
{code}

Is not about converter but about unmodifialble set, because the real exception was hidden!

1)Run the app
2)Click submit
3)Caused by User#L30



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