render view not in controller

render.rb

# http://makandracards.com/makandra/17751-render-a-view-from-a-model-in-rails
# https://github.com/yappbox/render_anywhere
# http://stackoverflow.com/questions/18263220/rendering-partials-view-in-a-rake-task-background-job-model-in-rails-4
# http://ruby-china.org/topics/12193
# http://alphahydrae.com/2013/06/rails-3-rendering-views-outside-a-controller/

  def render_to_string(options = {})
    av = ActionView::Base.new(ActionController::Base.view_paths)
    av.extend TranslationHelper
    av.render(:template => "contacts/index.pdf.erb",
              :locals => {:setting => school.setting,
                          :@school => school
                         })
  end