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From: Jens Alfke <jens@couchbase.com>
To: "user@couchdb.apache.org" <user@couchdb.apache.org>
Date: Wed, 22 May 2013 13:17:54 -0700
Subject: Re: _changes feed with filter - does filter pick up deletions?
Thread-Topic: _changes feed with filter - does filter pick up deletions?
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On May 22, 2013, at 1:09 PM, Daniel Myung <dmyung@dimagi.com> wrote:

> I've got a changes listener with a filter on it that checks:
>=20
> return doc.doc_type =3D=3D "foo";
>=20
> If I delete a document matching that criteria, I'm observing that it neve=
r
> gets emitted on that filtered changes feed with that criteria and the
> {"deleted": true } block.
>=20
> Is this expected behavior as designed?

Yes, and this is a very common question. I think it=92s come up on this lis=
t within the past week.

By default, when a document is deleted its contents are replaced with a =93=
tombstone=94 revision that just consists of {=93_deleted=94:true}. So a fil=
ter that checks for any other properties won=92t find them. The best soluti=
on is to delete the document and still keep whatever properties your filter=
 needs =97 you can do that by updating the document with PUT and adding a =
=93_deleted=94:true property to its contents. Or alternatively, I=92ve hear=
d you can add a JSON HTTP body to the DELETE request, containing the extra =
properties you want the =91tombstone=92 revision to have.

=97Jens=