Kamil created WICKET-6451:
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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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