CouchDB multiple tags

Question

Is there any way to have multiple tag search implemented in CouchDB? I have documents (posts) each with multiple tags. I need to find posts that have been tagged with an arbitrary set of tags. How do I do it? I could of course do it with multiple calls to a view which gives me the documents for a tag and then sort it out in my app but I wanted to know if there was a way to achieve the same in the CouchDB view land.

Answer 1

In the more recent versions of CouchDB, you can POST to a view with a JSON document called keys, which allows for multi-key lookup. The structure would look something like this:

{"keys": ["first_tag", "second_tag", "third_tag"]}

This could be POSTed to a view that you have that is emitting tags for its respective keys.

This and other querying options are documented here.