On Thu, Apr 5, 2012 at 10:41 PM, Pierre-Yves Chibon <pin...@pingoured.fr> wrote:
> In HyperKitty to be able to easily retrieve from the database all the > threads of a given month or just all the emails of a thread, I created a > Field in the database called ThreadID. > When I load the archives from mailman into mongo, I look for the absence > of the headers 'References' or 'In-Reply-To' to define an email that > starts a new thread. This fails when a thread crosses channels. Eg, To: Pierre From: Steve Message-Id: <x@y.z> is followed by To: Steve From: Pierre Cc: SomeList References: <x@y.z> Message-Id: <a@b.c> > Would anyone have an idea on how to generate a stable and delete/reload > proof ThreadID? I don't see how this can be possible. Eg, in the above scenario you construct a thread based on your reply to me. Then I go, "oh, really I should have posted to mm-dev" and repost the thread. So the "Message-ID of root message" fails, and I don't see an alternative that can be predicted. So it may as well be arbitrary (eg, any message in the thread) and stored in the database with appropriate linkage from thread IDs to message IDs (one-to-many), and vice versa (many-to-one). > The other solution of course being that I regenerate the thread on the > fly based on the first email (which is still easy to find), but that > will be a lot of db querying. I haven't thought about it deeply, but I would say just give the thread an arbitrary ID in the database. Message-IDs are supposed to universally unique, so what's wrong with keeping the thread in the database as a tree of message IDs? Some Message-IDs will not have corresponding messages but that's always a problem with threading (see http://www.jwz.org/doc/threading.html, and RFC 5256). There are other problems with threading that need to be dealt with as well, such as References being inconsistent across messages in the same thread and people who continue a thread with a new message, etc. _______________________________________________ Mailman-Developers mailing list Mailman-Developers@python.org http://mail.python.org/mailman/listinfo/mailman-developers Mailman FAQ: http://wiki.list.org/x/AgA3 Searchable Archives: http://www.mail-archive.com/mailman-developers%40python.org/ Unsubscribe: http://mail.python.org/mailman/options/mailman-developers/archive%40jab.org Security Policy: http://wiki.list.org/x/QIA9
