nfo

# The Riak object "b1/a" is linked to objects in "b2".
# The objects in "b2" contain a JSON hash with a "links" key. This list contains an array of ids.
# The objects "b3/idX" are the final objects, we can process them in maps and a reduce.

results = Riak::MapReduce.new(client).
            add('b1', 'a').
            # link-walk to objects in 'b2'
            link({:bucket => 'b2', :tag => '_', :keep => false}).
            # return a array of tuples [bucket, id], that Riak will recognize and follow
            map("function(v, keydata, arg) { return v.not_found ? [] : JSON.parse(v.values[0].data).links.map(function(x) { return [arg, x]; }); }", :keep => false, :arg => 'b3').

nfo

# Monkey patch Facebooker to set an access token instead of a session key,
# and use the access token on EVERY requests.
Facebooker::Session.class_eval do
  def post_without_logging_with_access_token(method, params = {}, use_session_key = true, &proc)
    params[:access_token] ||= (params.delete(:session_key) || @session_key)
    post_without_logging_without_access_token(method, params, false, &proc)
  end
  alias_method_chain :post_without_logging, :access_token
end