[ZODB-Dev] How Do I Get My Hands On An Old Version Of An Image

[Mark Palandri]

I have an Image object in my database that has been changed several 
times in the past. I can get a list of transactions like those 
generated by the ZMI undo tab, but as there is no history tab I'm 
having trouble figuring out how to get to the binary contents of 
those old Image versions.

Clearly the information is available in the database somewhere as I 
can undo the transactions and get back to the older versions of the 
Image. But, I do not want to have to undo the transactions to get my 
hands on the old versions of the Image.

What I want is a programmatic way to access the binary content of old 
versions of an Image. I've spent hours plowing through the ZODB and 
OFS source, but can't seem to find the key.

Can someone point me in the right direction?

Thanks

Mark