Mailing-List: contact user-help@couchdb.apache.org; run by ezmlm
Precedence: bulk
Reply-To: user@couchdb.apache.org
Received-SPF: pass (athena.apache.org: domain of tisdall@gmail.com designates
 209.85.215.180 as permitted sender)
MIME-Version: 1.0
In-Reply-To: <7EF3DA29-6961-42FC-93EB-81E54144CF25@apache.org>
References: 
 <CAGxYWpa6Y6Sn_pVAJG4emuP=t0fpBkGSOt-XZHevMUzuRXtJZA@mail.gmail.com>
	<CAHdjipKbgrdBrUUJe2pNaL-np4XdoWVi-M3hEC75PcQFWVd_LA@mail.gmail.com>
	<CAGxYWpaAdxcByNxR23Px1BnTeVvq4LxJqnT_rTz0PhfO-u81hg@mail.gmail.com>
	<7EF3DA29-6961-42FC-93EB-81E54144CF25@apache.org>
Date: Thu, 26 Jul 2012 11:05:31 -0400
Message-ID: 
 <CAGxYWpZ-twtJ=LYcVDwApd5vKNVt7-3W9YH+XZgv8303=GaPYQ@mail.gmail.com>
Subject: Re: accessing previous document revisions within a view
From: Tim Tisdall <tisdall@gmail.com>
To: user@couchdb.apache.org
Content-Type: text/plain; charset=ISO-8859-1

Yeah, I'm not planning to rely on it, just a way to hint at which
documents I need to look at without having to look at all documents or
alter the document's structure.

Okay, I guess I'll have to figure out a different approach then...  thanks.

On Thu, Jul 26, 2012 at 10:17 AM, Robert Newson <rnewson@apache.org> wrote:
> Tim,
>
> The couchdb revision system is to provide eventual consistency between database replicas. It is not a user-facing document versioning system. Old revisions are deleted during compaction and are not replicated either.
>
> B.
>
> On 26 Jul 2012, at 15:00, Tim Tisdall wrote:
>
>> Is it possible to access revisions through a filter?  Using a filter
>> on the changes log would also work for what I'd like to do.
>>
>> On Wed, Jul 25, 2012 at 6:38 PM, Alexander Shorin <kxepal@gmail.com> wrote:
>>> Hi Tim,
>>>
>>> CouchDB documents revisions aren't for versioning things[1]. To access
>>> to previous document revision within view you need to store previous
>>> revisions inlined within document and emit them in map function. Note,
>>> that this solution promises that document size will rapidly grow over
>>> time - you'll need to limit stored inlined revisions somehow.
>>>
>>> [1] http://wiki.apache.org/couchdb/Document_revisions
>>>
>>> --
>>> ,,,^..^,,,
>>>
>>>
>>> On Thu, Jul 26, 2012 at 2:29 AM, Tim Tisdall <tisdall@gmail.com> wrote:
>>>> Is it possible to access a previous revision of a document from within
>>>> a view?  I'd like to output something in a view based on the
>>>> difference between the revisions of the documents.
>>>>
>>>> -Tim
>