Kevin Menard commented on CAY-1080:
-----------------------------------
I finally figured out the root of the issue. I guess looking at the exceptions would have been helpful in the first place (this one wasn't picked by the console). Anyway, the issue was that org.apache.cayenne.exp.ExpressionParameter wasn't serializable. Making it implement Serializable fixed the problem.
I'll do some more thorough testing and try to get this committed.
> Support for copy/paste of entities/attributes/relationships
> -----------------------------------------------------------
>
> Key: CAY-1080
> URL: https://issues.apache.org/cayenne/browse/CAY-1080
> Project: Cayenne
> Issue Type: New Feature
> Components: CayenneModeler GUI
> Affects Versions: 3.0
> Reporter: Andrey Razumovsky
> Assignee: Kevin Menard
> Attachments: 1080.zip, patch-CAY-1080-2.txt
>
>
> Support for copy/paste of entities/attributes/relationships.
> This is GSoC 2008 task.
> Some of my ideas follow.
> We can implement copy-paste in two ways.
> First: the buffer is valid only within a sole project. So when you open another project, copied data is lost.
> Second, the buffer is stored in whole modeler application, or even system buffer. This allows to copy data between different projects, but is more complex because we need to create shallow copies of entities, attrs etc. Personally I use only one cayenne.xml currently.
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