Re: Historical Version of ZODB Objects

Maybe this problem is quite easy to solve with the newer versions of the ZODB.


>  From 
> https://github.com/jimfulton/pheather/blob/master/src/pheather/__init__.py#L57 <https://github.com/jimfulton/pheather/blob/master/src/pheather/__init__.py#L57>
  def history(self, size=9):
        for h in self._p_jar.db().history(self.__data._p_oid, size):
            yield h

Here is the documentation for the inner db().history method. 
  https://github.com/zopefoundation/ZODB/blob/master/src/ZODB/interfaces.py#L629 <https://github.com/zopefoundation/ZODB/blob/master/src/ZODB/interfaces.py#L629>


The critical thing is the tid.  Transaction ID.  

Using that we can open a connection into the database at the time of that version of the object was committed. 
https://github.com/zopefoundation/ZODB/blob/master/src/ZODB/Connection.py#L101 <https://github.com/zopefoundation/ZODB/blob/master/src/ZODB/Connection.py#L101>
 Connection(db,before=tid)
And then do connection.get(oid)

Where oid is the object id. 

Let me give it a shot. 

Warm Regards
Chris

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