[ZODB-Dev] semantics of _v_ attributes?

[Chris Withers]

Hi All,

I'm trying to fix this bug:
https://bugs.launchpad.net/zope2/+bug/649605

...and I'm struggling to find documentation on the semantics of _v_ 
attributes.

In particular, surely this code:

             base._p_activate()       # make sure we're not a ghost
             base.__setstate__(state) # change the state
             base._p_changed = True   # marke object as dirty

...should be enough to indicate that all _v_ attributes should be dropped?

If it isn't, what is the correct way to indicate to Persistent/ZODB that 
all _v_ attribute should be dropped not only for the current object but 
for all occurrences of that object across all connections to the current 
ZODB?

cheers,

Chris

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