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Date: Thu, 12 Feb 2009 11:42:25 +0100
Message-ID: <4b307fd10902120242v3bbbc93fs92c88503eb632fe9@mail.gmail.com>
Subject: playing with tags
From: Nicolas Clairon <clairon@gmail.com>
To: user@couchdb.apache.org
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Hi there !

I'm playing with tags these time and a question comes to me.
For exemple, I have a bunch of blog articles:

article1 = {
  ...snip...,
  tags : ["couchdb", "python", "best practices"],
}

article2 = {
    ...snip...,
    tags : ["python", "best practices"],
}

article3 = {
    ...snip...,
    tags : ["couchdb", "best practices"],
}

and a view wich emit tags:

function(doc){
    if (doc.type=="article"){
        for (var i in doc.tags){
            emit( doc.tags[i], doc )
        }
    }
}

We can get all articles wich are tagged with "couchdb" easily:

http://localhost:5984/blog/_view/article/by_tag?key="couchdb"

but now, I want all articles wich are tagged with "couchdb" *and* "python"
(I want the article1). Is there a method to do it directly with CouchDB views ?
Something like that :

http://localhost:5984/blog/_view/article/by_tag?key_in=["couchdb", "python"]

For the moment, I have to do it by program,  firing 2 views and merge
the results...

We can also think something like this:

http://localhost:5984/blog/_view/article/by_tag?onekey_in=["couchdb", "python"]

wich will get all articles which are tagged with "couchdb" *or* "python"...

Does it already exists in CouchDB ?