docbrown/app/views/admin/shared/_nested_sidebar.html.erb

<% menu_items.each do |group_name, group| %>
  <li>
    <% if group[:children].length == 1 %>
      <a class="crayons-link crayons-link--block <%= "crayons-link--current" if deduced_controller(request) == group[:children][0][:controller] %>"
         href="/admin/<%= group[:children][0][:controller] %>"
         aria-page="<%= "page" if deduced_controller(request) == group[:children][0][:controller] %>"
      >
        <%= inline_svg_tag("#{group[:svg]}", aria: true, class: "dropdown-icon crayons-icon") %>
        <%= display_name(group_name) %>
      </a>
    <% else %>
      <button class="crayons-link crayons-link--block cursor-pointer <%= "crayons-link--current" if deduced_scope(request) == group_name.to_s %>"
        data-toggle="collapse"
        data-target="#<%= group_name %>"
        aria-expanded="<%= (deduced_scope(request) == group_name.to_s).to_s %>"
        aria-controls="<%= group_name %>"
      >
        <%= inline_svg_tag(group[:svg], aria: true, class: "dropdown-icon crayons-icon") %>
        <%= display_name(group_name) %>
      </button>
      <ul id="<%= group_name %>"
           class="<%= (deduced_scope(request) == group_name.to_s) ? "expand show" : "collapse hide" %>"
        <% group[:children].each do |item| %>
          <li>
            <a class="crayons-link crayons-link--block ml-7 <%= "fw-bold" if deduced_controller(request) == item[:controller].to_s %>"
              href="/admin/<%= group_name %>/<%= item[:controller] %>"
              aria-page="<%= "page" if deduced_controller(request) == item[:controller].to_s %>"
            >
              <%= item[:name].to_s.titleize %>
            </a>
          </li>
        <% end %>
      </ul>
    <% end %>
  </li>
<% end %>