[Zope-dev] time-travel how to?

[Damien Morton]

Thanks for the tip.

Yes, the HistoricalRevisions subsystem looks interesting.

Im not sure it solves my problem though, in that the revisions seem to be
for a single given object, rather than for a given subtree or site. They
certainly dont seem to apply to folderish objects.

For my application, making read-only restrictions on time-travel is
perfectly acceptable, so I dont believe that paradoxes are of concern.

Anyone have any suggestions about where to start with this?

> -----Original Message-----
> From: Shane Hathaway [mailto:shane@digicool.com]
> Sent: Tuesday, December 05, 2000 11:05 AM
> To: zope-dev@zope.org
> Subject: Re: [Zope-dev] time-travel how to?
> 
> 
> Damien Morton wrote:
> > 
> > How do you access the fabled time travel features of Zope?
> > 
> > Reading through the source I see that you can open a 
> database in read only
> > mode and specify the point in time that that view is for.
> > 
> > Would it be possible to mount the same data.fs multiple 
> times in read-only
> > mode, each mounting with a different temporal view?
> > 
> > Is there some other mechanism by which the time-travel 
> feature can be
> > accessed? Ideally it would be possible to create a temporal 
> view of the
> > database much like one would create a version, but that the 
> view would be
> > enabled by traversing through that view in the URL.
> 
> See the history tab of DTML methods.
> 
> > For example, http://foo.com/nov3/x/y/z would be a view of 
> the database at
> > nov3, where the actual time and date of the view would be 
> specified in the
> > nov3 object.
> 
> That would be spiffy!  It would be fun to visit:
> 
> http://mysite.com/HistoricalRevisions/2000Jan01/manage
> 
> It's also very doable.  Of course, time travel restrictions would have
> to be imposed.  (Zope will produce a "temporal paradox" 
> exception if you
> do the right thing.  It's something of an easter egg IMHO.)
> 
> Shane
> 
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