const_missing

# File activesupport/lib/active_support/dependencies.rb, line 90
      def const_missing(const_name)
        if [Object, Kernel].include?(self) || parent == self
          super
        else
          begin
            begin
              Dependencies.load_missing_constant self, const_name
            rescue NameError
              parent.send :const_missing, const_name
            end
          rescue NameError => e
            # Make sure that the name we are missing is the one that caused the error
            parent_qualified_name = Dependencies.qualified_name_for parent, const_name
            raise unless e.missing_name? parent_qualified_name
            qualified_name = Dependencies.qualified_name_for self, const_name
            raise NameError.new("uninitialized constant #{qualified_name}").copy_blame!(e)
          end
        end
      end