A user clicks on an edit link an gets a form containing a detachable model. While the user is editing data on the form, the object they are working on is deleted by another user. The current user submits the form, which get it's model attached to contain a null object, and OGNL throws a null pointer exception. Has anyone found an elegant solution to this? Maybe model can throw an exception if it's object is null that's caught somewhere to display a nice message to the user? Is there one place in Wicket where I can catch all exceptions?
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