Phoenix.View.render_layout

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render_layout(module, template, assigns, list)

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Renders the given layout passing the given do/end block as @inner_content.

This can be useful to implement nested layouts. For example, imagine you have an application layout like this:

# layout/app.html.eex
<html>
<head>
  <title>Title</title>
</head>
<body>
  <div class="menu">...</div>
  <%= @inner_content %>
</body>

This layout is used by many parts of your application. However, there is a subsection of your application that wants to also add a sidebar. Let's call it "blog.html". You can build on top of the existing layout in two steps. First, define the blog layout:

# layout/blog.html.eex
<%= render_layout LayoutView, "app.html", assigns do %>
  <div class="sidebar">...</div>
  <%= @inner_content %>
<% end %>

And now you can simply use it from your controller:

plug :put_layout, "blog.html"