Thanks for your help


>>    (from ZODB.serialize.py - line 350)
>>            if obj._p_jar._implicitlyAdding(oid):
>>                raise InvalidObjectReference(
>>                    "A new object is reachable from multiple  
>> databases. "
>>                    "Won't try to guess which one was correct!"
>>                    )
>> Can anyone shed any light on what this error means?!
> It means a new object is referenced from objects in multiple databases  
> and it doesn't know what database to assign it to.

After some digging into the objects, I think I understand this.  It's 
come up as follows:

  - I load object A from the old database
  - Object A has an attribute B, which is an object also in the old database
  - I create a fresh copy of A, but leave the attribute B remained a 
reference to B in the old database
  - When I went to commit A, I got an error because A.B points to the 
old database still

Is this right?

>>  Given a persistent
>> object, what is the correct way to get a completely fresh copy that is
>> not tied to any database at all, so I can transfer these old objects  
>> to
>> the current database.
> I would use the database export/import API to export it from one  
> database and import it to another. (There are issues with doing this  
> in Zope 3, but I assume you're using Zope 2.

Sorry if I'm being thick - I thought the code below did indeed use the 
export/import API:

          container = app.new_folder

Is this what you meant?  If so, I'll do some more digging.



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