delegation.rb

module DataMapper
  module Resource
    
    def delegate(*methods)
      options = methods.pop
      unless options.is_a?(Hash) && to = options[:to]
        raise ArgumentError, "Delegation needs a target. Supply an options hash with a :to key as the last argument (e.g. delegate :hello, :to => :greeter)."
      end

      if options[:prefix] == true && options[:to].to_s =~ /^[^a-z_]/
        raise ArgumentError, "Can only automatically set the delegation prefix when delegating to a method."
      end

      prefix = options[:prefix] && "#{options[:prefix] == true ? to : options[:prefix]}_"

      allow_nil = options[:allow_nil] && "#{to} && "

      methods.each do |method|
        module_eval(<<-EOS, "(__DELEGATION__)", 1)
          def #{prefix}#{method}(*args, &block)                           # def customer_name(*args, &block)
            #{allow_nil}#{to}.__send__(#{method.inspect}, *args, &block)  #   client && client.__send__(:name, *args, &block)
          end                                                             # end
        EOS
      end
    end
  end
end

error.log

gems/dm-core-0.9.9/lib/dm-core/model.rb:478:in `method_missing': Unknown property 'delegate' (ArgumentError)
	from /Users/justinsmestad/Documents/Factory/smoke_hut/app/models/resort.rb:11

init.rb

Merb::BootLoader.before_app_loads do
  # This will get executed after dependencies have been loaded but before your app's classes have loaded.
  require Merb.root / "lib" / "delegation"
end
 
Merb::BootLoader.after_app_loads do
  # This will get executed after your app's classes have been loaded.
end

resort.rb

class Resort
  include DataMapper::Resource
  
  property :id, Serial
  property :name, String

  # Potential Resort Stats
  
  has n, :passholders, :class_name => 'User'
  has 1, :shortcode
  delegate(:messages, :to => :shortcode)
  
end