app/helpers/dot_helper.rb

@@ -17,10 +17,11 @@ module DotHelper

                   class DotDrawer
              

                     def initialize(vars = {})
              

                       @dot = ''
              

                -      vars.each { |name, value|
              

                -        # Import variables as methods
              

                -        define_singleton_method(name) { value }
              

                -      }
              

                +      @vars = vars.symbolize_keys
              

                +    end
              

                +
              

                +    def method_missing(var, *args)
              

                +      @vars.fetch(var) { super }
              

                     end
              

                 
              

                     def to_s