[SOLVED] Fragment caching is not working in rails 3

Fragment caching is not working in rails 3

I am using rails 3 and fragment cache. Here is my controller code(show method):

if request.format == 'pdf'
      render pdf: @design.slug, layout: 'application'
    else
      **expire_fragment('design_printed_by')**
      @design.add_evaluation(:viewed_count, 1, current_user) if current_user && !current_user.evaluated?(@design, :viewed_count)
      respond_with @design
    end

And here is my view file code(show.html.slim) :

- cache ['design_printed_by', @design], skip_digest: true do
          = render partial: 'printed_by', locals: { design: @design }

But when i add new record, this record is not display on page. I don't know what i am missing.

Is there anything wrong with this code?

Solution