This used to work in ruby 1.8 In ruby 1.9 it creates an endless recursion. Where's my mistake?

rest_object.rb

class RestObject
  (...)

  ##
  # To be able to serialize objects they can't have Proc's, and @response/@request
  # have them. So we remove them before actually doing the to_yaml.
  def to_yaml(*args)
    old_values = @response, @request
    @response, @request = nil, nil

    begin
      super(*args)
    ensure
      @response, @request = old_values
    end
  end
end

In ruby you can specify what gets serialized in yaml like this:

def to_yaml_properties
  [:@id]
end

another example

def to_yaml_properties
  instance_variables - [:@proxy, :@identity]
end

Maybe this can help?

You're a star Jorge. That works wonderfully.

With all my google searches I couldn't find that anywhere. Guess I was searching for the wrong thing.