Description
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:
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]]
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
Attachments
Attachments
Issue Links
- is duplicated by
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WICKET-6450 FormComponent should not always create ArrayList when field is null
- Resolved