def update_tags
    @story = Story.find(params[:id])
    if params[:people_ids]
      #debugger
      to_remove = params[:people_ids].split(',') - @story.people.collect(&:id)
      to_add = params[:people_ids].split(',') + @story.people.collect(&:id)
      to_add.each do |id|
        unless person_id.blank?
          r = Relationship.new()
          r.related_to_id = @story.id
          r.related_to_type = 'Story'
          r.relateable_id = id
          r.relateable_type = 'Person'
          r.save!
        end
      end
      redirect_to :stories
    end
  end