app/views/relationable/_related_content.html.erb
<div class="related-content padding">
<h2 class="inline-block">
<%= t("related_content.title") %> <span>(<%= relationable.relationed_contents.count %>)</span>
</h2>
<% if current_user %>
<%= render "relationable/form", relationable: relationable %>
<% end %>
<%= render Relationable::RelatedListComponent.new(relationable) %>
</div>