set_allowed_actions

# File actionpack/lib/action_controller/resources.rb, line 137
        def set_allowed_actions
          only, except = @options.values_at(:only, :except)
          @allowed_actions ||= {}

          if only == :all || except == :none
            only = nil
            except = []
          elsif only == :none || except == :all
            only = []
            except = nil
          end

          if only
            @allowed_actions[:only] = Array(only).map(&:to_sym)
          elsif except
            @allowed_actions[:except] = Array(except).map(&:to_sym)
          end
        end