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Message-ID: <e282921e0805131531la927760w5dfbe45083e734f4@mail.gmail.com>
Date: Tue, 13 May 2008 15:31:36 -0700
From: "Chris Anderson" <jchris@mfdz.com>
Sender: jchris@gmail.com
To: couchdb-user@incubator.apache.org
Subject: Re: mapping on a key that doesn't exist
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References: <D60D2C95-D4DA-459A-8C4A-2A7F2DE786EE@raybeam.com>
	 <5BC50A6D-FB6F-4F48-ABEE-B3904C51F5C4@apache.org>

On Tue, May 13, 2008 at 3:04 PM, Jan Lehnardt <jan@apache.org> wrote:
>
> On May 13, 2008, at 23:19, Bob Briski wrote:
>
>> I've found that I can't create a view with a key that includes a document
>> key that doesn't exist in all documents.

You could try this simplification as a way to create a default value
in the case of undefined:

function(doc) {
  if(doc.type=="Performance") {
    map([doc.product_id, (doc.tracking_code||null), doc.date], doc);
  }
}

The use of || as a guard statement in this way ought to work just
fine. You can use anything you want instead of null as the default.

-- 
Chris Anderson
http://jchris.mfdz.com