snippet.rb

class Route < ActiveRecord::Base
  attr_accessor :startpaint_id, :endpaint_id, :directions
  
  belongs_to :start, :class_name => "Venue", :foreign_key => "startpoint_id"
  belongs_to :end, :class_name => "Venue", :foreign_key => "endpoint_id"
  
  validates :startpoint_id, :presence => true 
  validates :endpoint_id, :presence => true 
  
  after_create :get_xml
  
  def directions
     self.doc.xpath('//step').map do |i| 
      {'description' => i.xpath('html_instructions').text.html_safe, 
        'distance' => i.xpath('distance/text').text.html_safe
        }
        end 
  end
  

private 
  def xml
    GoogleDirections.new(self.start.location,self.end.location).xml
  end
  
  def doc(args)
    Nokogiri::XML(self.xml)
  end
  

end