Nested layouts in Phoenix

web-controllers-doc_controller.ex

defmodule Asciinema.DocController do
  use Asciinema.Web, :controller

  def show(conn, _params) do
    conn
    |> put_layout(:docs)
    |> render("show.html")
  end
  
end

web-templates-doc-wrapper.html.eex

<div class="container">
  <div class="row">
    <div class="col-md-3">
      ...
    </div>
    <div class="col-md-9">
      <%= render @view_module, @tpl %>
    </div>
  </div>
</div>

web-templates-layout-docs.html.eex

<%= render @view_module, "wrapper.html", Map.merge(assigns, %{layout: {Asciinema.LayoutView, "app.html"}, tpl: @view_template}) %>