[Zope] idea for unique object id's

[Charlie Reiman]

People ask for UIDs pretty often. It's a bit tricky to do right. It must be
high bandwidth, guaranteed correct, resistant to DOS attacks, and unlikely
to make the ZODB grow wildly. It would be good to have a solid
Zope-Seal-of-Approval solution in the box.

I had a need for this but didn't need anything quite so robust. This
simple/stupid solution rolls over in about 12 years and can generate 10
unique ids per second (I think. I should have written it down). In my case
the application is behind a firewall with select client access so a more
serious solution is not necessary.

# I used to generate this ID in an separate python object but I
# couldn't make the security work. Very strange.
new_id = 'z%08x' % ((DateTime.DateTime().timeTime()-1040000000.0)*10.0)

-----Original Message-----
From: zope-admin@zope.org [mailto:zope-admin@zope.org]On Behalf Of Daniël
Hooymans
Sent: Thursday, December 19, 2002 7:45 AM
To: zope@zope.org
Subject: [Zope] idea for unique object id's


Hi all,

Is it an idea to make a Folderish class which will generate a unique id when
an object is added to it.
Perhaps anyone has already done something like this?

Greetz,

Daniel