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From Brian Candler <>
Subject Re: How to get nested-key-sorted collection of documents
Date Mon, 23 Nov 2009 13:00:26 GMT
On Mon, Nov 23, 2009 at 08:58:04AM +1100, Mark Hammond wrote:
> Here your map function looks something like:
> emit([,], null);
> Your rows will then be returned, with the _id, in order of author and  
> date.  You could query like:
> startkey=["Tolstoj", 1985], endkey=["Tolstoj", 1999]
> To query a range of dates for a single author.
> Very similar:
> emit([,, doc.publisher], null);
> By using the group_level capability (see the wiki about the view API),  
> you could still search just by author, by author and date, or by all 3  
> fields.

And of course you could use this view for the first query as well. A query

  startkey=["Tolstoj"]&endkey=["Tolstoj", {}]

will still find all the relevant rows - it's just that this time they will
be sorted by publisher and then _id, rather than just _id.

If you have a reduce function (e.g. which counts books), then using
group_level=2 would give you counts by author and year, independent of

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