MongoDb Update

require 'mongo'

db = ::Mongo::Connection.new('genesis.mongohq.com', 27021).db('DB_DB_DB_DB_DB')
raise "Could not connect!" unless db.authenticate('USER_USER_USER_USER_USER', 'PASS_PASS_PASS_PASS_PASS')

feeds = db.collection('feeds')
comments = db.collection('comments')

query = {"options.language" => "pt"}
feeds.find(query).each do |feed|
  target = feed['target']
  puts target

  where = {:target => target}
  update_to = {"$set" => {"lang" => "pt"}}
  comments.update(where, update_to, {:multi => true, :upsert => false})
end