[ZODB-Dev] Object Versions Used by ZODB, is there an object attribute for it ?

[Shane Hathaway]

On Thu, 11 Dec 2003, Jeremy Hylton wrote:

> You're looking for _p_serial, but it's not clear if you should be
> looking for it or not.  That is, Zope developers seem to steer clear of
> using low-level peristence mechanisms to implement application-level
> concepts like version control.  I don't know how this argument would
> apply in your case.

_p_oid and _p_serial are useful to Zope developers as opaque attributes.  
For example, I wouldn't consider "obj._p_serial > cached_serial" to be
safe, since ZODB doesn't clearly specify what type of object _p_serial is 
supposed to be.  However, "obj._p_serial != cached_serial" is fine.

Shane