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Subject: Re: Data modelling
From: Robert Newson <rnewson@apache.org>
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Date: Thu, 12 Jul 2012 15:48:28 +0100
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To: user@couchdb.apache.org

It's not a transaction in any useful sense.

B.

On 12 Jul 2012, at 14:47, Matthieu Rakotojaona wrote:

> Just a precision :
>=20
> On Thu, Jul 12, 2012 at 1:07 PM, Bernhard Gschwantner
> <bernhard@unserwein.at> wrote:
>> With that construction, you can be sure that it will never happen =
that you
>> deduct an amount from one account and never add it to the other. If =
you
>> make this two transaction documents, It could be that you try to =
create
>> both documents, but only one succeeds. Or if you replicate your =
database,
>> the first one is replicated, and then the network connection goes =
down.
>=20
> You can use the _bulk_docs endpoint with the all_or_nothing option, to
> use some kind of transaction :
> =
http://wiki.apache.org/couchdb/HTTP_Bulk_Document_API#Transactional_Semant=
ics_with_Bulk_Updates
>=20
> I know that replication uses the bulk API for putting the docs on the
> target, but I don't know if it includes this option.
>=20
> --=20
> Matthieu RAKOTOJAONA