terraform/website/source/layouts/postgresql.erb

<% wrap_layout :inner do %>
  <% content_for :sidebar do %>
    <div class="docs-sidebar hidden-print affix-top" role="complementary">
      <ul class="nav docs-sidenav">
        <li<%= sidebar_current("docs-home") %>>
        <a href="/docs/providers/index.html">&laquo; Documentation Home</a>
                </li>

        <li<%= sidebar_current("docs-postgresql-index") %>>
        <a href="/docs/providers/postgresql/index.html">PostgreSQL Provider</a>
                </li>

        <li<%= sidebar_current(/^docs-postgresql-resource/) %>>
        <a href="#">Resources</a>
                <ul class="nav nav-visible">
                    <li<%= sidebar_current("docs-postgresql-resource-postgresql_database") %>>
                        <a href="/docs/providers/postgresql/r/postgresql_database.html">postgresql_database</a>
                    </li>
                    <li<%= sidebar_current("docs-postgresql-resource-postgresql_extension") %>>
                        <a href="/docs/providers/postgresql/r/postgresql_extension.html">postgresql_extensions</a>
                    </li>
                    <li<%= sidebar_current("docs-postgresql-resource-postgresql_role") %>>
                        <a href="/docs/providers/postgresql/r/postgresql_role.html">postgresql_role</a>
                    </li>
                    <li<%= sidebar_current("docs-postgresql-resource-postgresql_schema") %>>
                        <a href="/docs/providers/postgresql/r/postgresql_schema.html">postgresql_schema</a>
                    </li>
                </ul>
        </li>
      </ul>
    </div>
  <% end %>

  <%= yield %>
  <% end %>