runosaari.net/lib/runosaari_web/templates/index/edit.html.eex

<section class="main">
    <h1>Muokkaa kappaletta</h1>

    <%= render "form.html", Map.put(assigns, :action, Routes.admin_index_path(@conn, :update, @index)) %>

    <span><%= link "Takaisin", to: Routes.admin_index_path(@conn, :admin) %></span>
</section>