multiple key ranges as parameters to a couchdb view
- by kolosy
is there a way to send multiple startKey/endKey pairs to a view, akin to the keys: [] array that can be posted for keys?
the underlying problem - let's say my documents have "categories" and timestamps. if i want all documents in the "foo" category that have a timestamp that's within the last two hours, it's simple:
function (doc) {
emit([doc.category, doc.timestamp], null);
}
and then query as
GET server:5894/.../myview?startKey=[foo, |now - 2 hours|]&endkey=[foo, |now|]
the problem comes when i want something in categories foo or bar, within the last two hours. if i didn't care about time, i could just pull directly by key through the keys collection. unfortunately, i have no such option with ranges.
what i ended up doing in the meantime is rounding the timestamp to two-hour blocks, and then multiplexing the query out:
POST server:5894/.../myview
keys=[[foo, 0 hours], [foo, 2 hours], [bar, 0 hours], [bar, 2 hours]]
it works, but will get messy if i want to go back a large amount of time (in relationship to the blocksize)
