DiskFile not cloned when published

Hi

I'm having the following problem with CPS 3.4.2:

- in the portal_schemas, for the File (CPS Document) schema, replace File with 
DiskFile.
- create a File (CPS Document) object in the workspace and upload a file in it
- publish the document into the section

Now:

- modify the filename of the attached file in the workspace side or edit or 
upload a new file.

Problem : The modification is reflected in the section, although it should not.

The published object is a new revision and is supposed to be distinct from the 
one in the workspace. This issue can even lead to data loss.


I've understood that the contained object (the DiskFile) is not cloned and the 
two CPSDocument objects (the one in the section and the one in the workspace) 
contain the same DiskFile object. I'm not sure I fully understand why it is not 
cloned. The '_object' attribute of the proxy (which contains the contained 
objects) is not serialized. So it's value is always an empty tuple. the 
manageAfterClone code tries to iterate over it, so it doesn't find anything, and 
does not clone the contained objects.

Is there something wrong with what I'm saying, or is there a real problem?

Christophe
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