gistfile1.rb

  def beneficiary_relationships=(arg)
    raise ArgumentError, "beneficiaries must be set as a hash keyed with relationship id's, with values as booleans" unless arg.is_a?(Hash)
    if new_record?
      @relationships_to_associate = arg
    else
      enable_ids = arg.select {|key, value| ["true","1"].include?(value.to_s) }.map {|k,v| k.to_i }
      relationship_list = Relationship.all(:origin_user_id=>user_id, :id=>enable_ids)
      self.relationships.clear
      self.relationships = relationship_list
      save
    end
  end
  after :save do
    if r = @relationships_to_associate
      self.beneficiary_relationships = r
    end
  end