[Zope-CMF] Historical revisions in CMF (was Re: CMF newbiequestions)

[Dieter Maurer]

--5WQbovnOO0
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Ausum Studio wrote at 2003-3-29 07:58 -0500:
 > ....
 > ----- Original Message -----
 > From: "Dieter Maurer" <dieter@handshake.de>
 > > ....
 > > I also have a "historical connection" that automatically
 > > loads subobjects as of a given historical time.
 > > This makes the history mechanism available for structured
 > > object, such as folders.
 > >
 > >
 > > If someone it interested, I can make code available.
 > >
 > 
 > I am interested. :)

I attach the module.

Use its "Historical" the same way you would use "OFS.History.Historical".

It behaves like the original with the exception that access to
a persistent subobject does not return the current version
of the subobject but that which was current at the historical time.
The same holds true for indirect access to persistent descendants:
you see the subhierarchy as it was at the historical time.


The "_hasSmartHistory" function is part of my "ReadCommited" ZODB patch.
If applied (there is one known problem with respect to transaction
abortion; thus, you may want to wait until this has been sorted out),
you will get more efficient history operations (by a factor of 2)
for "FileStorage".


Dieter


--5WQbovnOO0
Content-Type: application/x-python
Content-Description: "History" module -- an extension to "OFS.History" to provide historical access to persistent subobjects
Content-Disposition: attachment;
	filename="History.py"
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