gistfile1.rb

      def read_many(query)
        puts query.inspect
        DataMapper::Collection.new(query) do |set|
          read(query, set, true)
        end
      end

      def read(query, set, arr = true)
        file = './config/dhcpd.conf'        
        repository_name = query.repository.name
        properties = query.fields

        puts "repository_name: \t#{repository_name}, \nproperties: \t#{properties}"

        results = []
        File.read(file).scan(/^host\s+([^\s\{]+).+?hardware\sethernet\s+([^;]+).+?fixed-address\s+([\d\.]+)/m).each do |host|
          results << [host[0], host[1], host[2]]

          results.each do |result|
            values = result_values(result, properties, repository_name)
            # This is the core logic that handles the difference between all/first
            arr ? set.load(values) : (break set.load(values, query))
          end           
        end

        def result_values(result, properties, repository_name)
          properties.map { |p| result.send(p.field(repository_name)) }
        end