Marco Bizzarri wrote at 2008-9-19 09:23 +0200:
> ...
>I assume therefore that the ZPsycopgDA object has been "ghostified",
>during the transaction. But this "assumption" is not supported by any
>evidence. In particular, it is not supported by my knowledge of the
>internal behaviour of ZODB on objects during a single transaction.
>Can anyone provide suggestion on this topic?

Cache garbage collection can happen at savepoint time.
Then, volatile attributes can be lost.

There is an age old proposal
which would allow to avoid this problem.

As we use this feature since ages in our local Zope/ZODB
version, I could provide an implementing patch (for ZODB 3.8).

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