when 'in_factory'
      current = true if params[:circulation_status_in_factory]
      string << "<strong>" if current
      c = CirculationStatus.find_by_name('In Factory')
      string << link_to("#{c.display_name.localize} (" + facet.count.to_s + ")", url_for(params.merge(:circulation_status_in_factory => true, :circulation_status_in_process => nil, :page => nil, :view => nil)))