On the HEAD recently, a bunch of changes were made to the Persistence
package. Notably, the Persistence.PersistentMapping module was removed
in favor of a Persistence.mapping module. Unfortunately, there are
instance pickles lying around in any CMF instance created prior to the
changes (DiscussionItem's _container attribute is the one I found) which
explicitly refer to Persistence.PersistentMapping.PersistentMapping.
This name can no longer be resolved to a class. This breaks b/w
I "fixed" the issue by adding the following to the Persistence package's
That seems really ugly, though. Is there a better way to fix it?
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