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From: Norman Rosner <normanrosner@googlemail.com>
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Subject: Chaining of views/MapReduce
Date: Wed, 17 Feb 2010 21:04:19 +0100
Message-Id: <96B56DFD-CE21-4B69-9D43-C8CF3F841C9F@googlemail.com>
To: user@couchdb.apache.org
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Hi folks,

first, I'll have to admit that I'm kinda new to JavaScript and of course =
to CouchDB.  Second I just reuse the subject so I hope it also pops up =
if anybody searches for it.=20

As I read chaining of views is not possible yet but it's mentioned =
couple of times on the mailing list. So here's what I want to do:

1. Create a list of unique labels/tags/whatever through all of the =
documents (e.g. all nouns that are in the documents)
2. Extract all labels/tags/nouns of each document and check them again =
the before calculated result in some kind of way=20

For the second point I created a view which works except of the checking =
against the result from point 1. Now I'm trying to solve point 1.=20
And here my questions begin: How can I create/update a document from =
inside of a map function? As I think of it, I'll have to make a HTTP GET =
to load the document in each iteration. I found some HTTP stuff in the =
test.js in the test folder, but I'm not quite sure how to use it and if =
it's the right way of thinking? Is there any way of using global =
variables throughout 'couchapps' (e.g. through the lib folder and =
thelike)?

Any help of you CouchDB kings would be greatly appreciated!

Cheers,

norman=