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From: Nils Breunese <N.Breunese@vpro.nl>
To: "user@couchdb.apache.org" <user@couchdb.apache.org>, N/A N/A
	<pressley333@yahoo.com>
Date: Thu, 3 Nov 2011 14:59:26 +0100
Subject: Re: couchdb: function eval on insert, update...
Thread-Topic: couchdb: function eval on insert, update...
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N/A N/A wrote:

> Any plans to implement doc features, like expression evaluation on insert=
 or update in CouchDB? For example:
> POST:
> {
> "test1": "1",
> "test2": "2",
> "test3": function(doc) {
> var res =3D doc.test1 + doc.test2
> return res;
> /* or maybe even                if (doc["test2"]) {
> doc["test4"]();
> } else {
> ... more stuff...
> }
> */
>     }
> "test4": function(doc_or_maybe_something_else) { ... }
> }
>
> result in couchdb:
> {
> "test1": "1",
> "test2": "2",
> "test3": "3"
> // ..etc.
> }

Document update handlers [0] can be used to invoke server-side logic to cre=
ate or update a document. Maybe you can use this to solve your use case?

Nils

[0] http://wiki.apache.org/couchdb/Document_Update_Handlers
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