user.rb

  def permitted?(uid, data_model)
    code = 0
    if connected?(uid)
      Connection.where(:user_id => uid, :conn_id => id).all(:select => 'circle_id').each do |c|
        code |= Circle.find(c.circle_id).role.to_i(2)
      end
    elsif uid == id
      return true
    end
    code.to_s(2)[APP_CONFIG[:data_models].reverse.index(data_model)] == "1"
  end