def method_missing(method_id, *arguments, &block)
          if match = DynamicFinderMatch.match(method_id)
            attribute_names = match.attribute_names
            super unless all_attributes_exists?(attribute_names)
            if match.finder?
              finder = match.finder
              bang = match.bang?
              self.class_eval %{
                def self.#{method_id}(*args)
                  options = args.extract_options!
                  attributes = construct_attributes_from_arguments([:#{attribute_names.join(',:')}], args)
                  finder_options = { :conditions => attributes }
                  validate_find_options(options)
                  set_readonly_option!(options)
 
                  #{'result = ' if bang}if options[:conditions]
                    with_scope(:find => finder_options) do
                      find(:#{finder}, options)
                    end
                  else
                    find(:#{finder}, options.merge(finder_options))
                  end
                  #{'result || raise(RecordNotFound, "Couldn\'t find #{name} with #{attributes.to_a.collect {|pair| "#{pair.first} = #{pair.second}"}.join(\', \')}")' if bang}
                end
              }, __FILE__, __LINE__
              send(method_id, *arguments)
            elsif match.instantiator?
              instantiator = match.instantiator
              self.class_eval %{
                def self.#{method_id}(*args)
                  guard_protected_attributes = false
 
                  if args[0].is_a?(Hash)
                    guard_protected_attributes = true
                    attributes = args[0].with_indifferent_access
                    find_attributes = attributes.slice(*[:#{attribute_names.join(',:')}])
                  else
                    find_attributes = attributes = construct_attributes_from_arguments([:#{attribute_names.join(',:')}], args)
                  end
 
                  options = { :conditions => find_attributes }
                  set_readonly_option!(options)
 
                  record = find(:first, options)
 
                  if record.nil?
                    record = self.new { |r| r.send(:attributes=, attributes, guard_protected_attributes) }
                    #{'yield(record) if block_given?'}
                    #{'record.save' if instantiator == :create}
                    record
                  else
                    record
                  end
                end
              }, __FILE__, __LINE__
              send(method_id, *arguments, &block)
            end
          else
            super
          end
        end