[Zope3-Users] History of an Object

[Gary Poster]

On Sep 28, 2005, at 7:04 AM, James Allwyn wrote:

> Hello,
>
> Transactions and undo functionality seem to be well-supported in Zope;
> I assume that the past states of objects are stored in the database.

Until you pack the database.

> For our application it would be useful to access these past states for
> an object. I have in mind something along the lines of the wikipedia
> History tab, which allows you to see what an object was like at a
> given past instance.
>
> The actual Undo functionality is not too important for the
> application, and there are certainly users that I would want to be
> able to view the past states but not be able to revert (undo) to it.
>
> Since the undo data is already being stored it feels like I should be
> able to tap into this to access the past states, without having to
> actively store anything - does anyone have any hints on how I might go
> about this?

A Zope object versioning system is more appropriate for this case.   
One take is in the zope trunk now--maybe zope.app.versioning?

Gary