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I'm trying to get a subset of fields from MongoDB with a query made in Ruby but it doesn't seem to work. It doesn't return any results
This is the ruby code:
coll.find("title" => 'Halo', :fields => ["title", "isrc"]) #this doesn't work
If I remove the fields hash, it works, returning the results with all the fields
coll.find("title" => 'Halo') #this works
Looking at the mongodb console the first query ends-up on the mongodb server like this:
{ title: "Halo", fields: [ "title", "isrc" ] }
If I try to make the query from the mongo client console, it works, I get the results and the subset. I make the query like this:
db.tracks.find({title: 'Halo'}, {title:1,isrc:1})
What could be the problem? I've been looking for a solution for this for a couple of hours now.