improving 'BaseObject._renameAfterCreation'

Hi,

in BaseObject._renameAfterCreation it is currently
hard coded that the candidate value for the new id
is coming from the title (by simply calling

     title = self.Title()

and working with that value further on.

Now I would like to be able to extend that such that
custom content types can optionally override this
behavior, e.g., by checking for a certain method
that people can provide to influence renaming.

Something like

    title = shasattr(self, '_at_RenameFrom')
            and self._at_RenameFrom()
            or self.Title()

should do it.

Any objections? Any better approaches to providing the
desired behavior? Any better names for the new method?

Raphael



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