app/views/labs/_breadcrumbs.html.haml
%ol.breadcrumb
%li.breadcrumb-item
= link_to Lab.to_s.pluralize, labs_path
%li.breadcrumb-item
= link_to labs_path(q: {country_code_eq: lab.country_code}) do
%span.flag{class: "flag-#{lab.country_code.downcase}"}
= lab.country&.common_name
%span.microdata{itemprop: "country"}= lab.country_code
%li.breadcrumb-item
= link_to lab, lab