#Activity model on Service side

#setter and getter for tag_string
  def tag_string= tag_string
    self.tags.each { |tag| tag.delete } if self.tags
    tag_names = tag_string.split(',')
    tag_names.each do |tag_name|
      puts "tag_name: #{tag_name}"
      tag = Tag.new(:name => tag_name.strip)
      self.tags << tag
    end
  end

  def tag_string
    puts "this works"
    tag_list = ""
    self.tags.each do |tag|
      tag_list.concat(tag.name+', ')
    end
    2.times {tag_list.chop!}
    tag_list
  end

#ActivitiesController,  service1:
def show
    @activity = Activity.find(params[:id])
    render :json => @activity.to_json(:except => [:access_key, :created_at, :updated_at],
      :include => {:tags => {:only => :name}})
  end