dot access and refering to subscript of attributes

rs_array_load.rb

#!/usr/bin/env ruby
# coding: utf-8

require 'rubygems'
require 'right_resource'

# Server Array Response data sample
xml = '<server-array>
   <active type="boolean">false</active>
   <array-type>queue</array-type>
   <description > mydesc </description>
   <elasticity-function>sqs_queue_size</elasticity-function>
   <nickname>Array for "Transcoding" (Queue)</nickname>
   <href>http://my.rightscale.com/api/acct/1/server_arrays/1</href>
   <server-template-href>http://my.rightscale.com/api/acct/1/ec2_server_templates/1</server-template-href>
   <indicator-href>http://my.rightscale.com/api/acct/1/sqs_queues/1</indicator-href>
   <audit-queue-href nil="true"/>
   <deployment-href>http://my.rightscale.com/api/acct/1/deployments/1</deployment-href>
   <ec2-ssh-key-href>http://my.rightscale.com/api/acct/1/ec2_ssh_keys/1844</ec2-ssh-key-href>
   <ec2-security-groups-href>http://my.rightscale.com/api/acct/1/ec2_security_groups/159</ec2-security-groups-href>
   <voters-tag>foo</voters-tag>
</server-array>'


data = RightResource::Formats::XmlFormat.decode(xml)

ServerArray.connection = RightResource::Connection.new

rs_array_hash = ServerArray.correct_attributes(data['server_array'])
rs_array_obj = ServerArray.new(rs_array_hash)

# Get Server Array attributes
pp rs_array_obj.attributes
=begin
{:active=>false,
 :ec2_security_groups_href=>
  "http://my.rightscale.com/api/acct/1/ec2_security_groups/159",
 :elasticity_function=>"sqs_queue_size",
 :indicator_href=>"http://my.rightscale.com/api/acct/1/sqs_queues/1",
 :server_template_href=>
  "http://my.rightscale.com/api/acct/1/ec2_server_templates/1",
 :description=>" mydesc ",
 :deployment_href=>"http://my.rightscale.com/api/acct/1/deployments/1",
 :ec2_ssh_key_href=>"http://my.rightscale.com/api/acct/1/ec2_ssh_keys/1844",
 :href=>"http://my.rightscale.com/api/acct/1/server_arrays/1",
 :voters_tag=>"foo",
 :nickname=>"Array for \"Transcoding\" (Queue)",
 :audit_queue_href=>nil,
 :array_type=>"queue"}
=end

# dot access -> attributes member
pp rs_array_obj.attributes[:deployment_href]
#=> "http://my.rightscale.com/api/acct/1/deployments/1"
pp rs_array_obj.deployment_href
#=> "http://my.rightscale.com/api/acct/1/deployments/1"