Mailing-List: contact user-help@couchdb.apache.org; run by ezmlm
Precedence: bulk
Reply-To: user@couchdb.apache.org
Received-SPF: pass (nike.apache.org: local policy)
Date: Mon, 28 Jun 2010 15:29:17 +0200 (CEST)
From: mickael.bailly@free.fr
To: user@couchdb.apache.org
Message-ID: 
 <396506980.1696591277731757277.JavaMail.root@zimbra5-e1.priv.proxad.net>
In-Reply-To: 
 <2105158520.1693781277731197288.JavaMail.root@zimbra5-e1.priv.proxad.net>
Subject: selecting a random subset of a view
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit

Hello couchers,

how would you do to select a random subset of a view result (a simple view with map only).

Example (I don't write the full view response array for clarity)

When called normally, my view returns :

{
...
rows: [
{id: aa1},
{id: aa2},
{id: aa3},
{id: aa4},
{id: aa5},
{id: aa6},
{id: aa7},
{id: aa8},
{id: aa9}
]
}

And I want only three of those rows, randomly chosen. So I launch the magic "get three random rows" feature, and it gives me :

{
...
rows: [
{id: aa5},
{id: aa3},
{id: aa6}
]
}

The second time I launch the same magic "get three random rows" I got:
{
...
rows: [
{id: aa7},
{id: aa1},
{id: aa5}
]
}

Thanks for your advices

Mickael