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<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title>The Rails Default Application Layout</title>
<link rel="stylesheet" href="/css/screen.css" type="text/css" charset="utf-8" />
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<a href="http://railsapps.github.com/">Rails Apps</a>
<a href="https://github.com/RailsApps">GitHub Repository</a>
</div><!-- class="actions" -->
<h1>The Rails Default Application Layout</h1>
<div class="content wikistyle gollum textile">
<h1>The Rails Default Application Layout</h1>
<p>This is a guide for developers using the example apps from the <a href="http://railsapps.github.com/">Rails Apps</a> repository. Others may find it helpful as well.</p>
<blockquote>
<p><ins>If you are creating an application template, this step uses the <a href="https://github.com/RailsApps/rails_apps_composer/raw/master/recipes/application_layout.rb">application_layout</a> recipe from the <a href="https://github.com/RailsApps/rails_apps_composer">rails_apps_composer</a> repository.</ins></p>
</blockquote>
<h2>Background</h2>
<p>Rails will use the layout defined in the file <strong>app/views/layouts/application.html.erb</strong> or <strong>app/views/layouts/application.html.haml</strong> as a default for rendering any page.</p>
<p>You’ll want to include flash messages for errors and notifications. Set up your application layout by modifying the default as described below.</p>
<h2>Include Flash Messages</h2>
<h4>
<span class="caps">ERB</span>
</h4>
<p>Include flash messages in <strong>app/views/layouts/application.html.erb</strong> like this:</p>
<pre>
<body>
<%- flash.each do |name, msg| -%>
<%= content_tag :div, msg, :id => "flash_#{name}" if msg.is_a?(String) %>
<%- end -%>
<%= yield %>
</pre>
<h4>Haml</h4>
<p>For Haml, modify <strong>app/views/layouts/application.html.haml</strong> like this:</p>
<pre>
%body
- flash.each do |name, msg|
= content_tag :div, msg, :id => "flash_#{name}" if msg.is_a?(String)
= yield
</pre>
<h2><span class="caps">ERB</span> for Rails 3.1</h2>
<p>The <strong>Rails 3.1</strong> modified application layout <strong>app/views/layouts/application.html.erb</strong> will look like this:</p>
<pre>
<!DOCTYPE html>
<html>
<head>
<title>My App</title>
<%= stylesheet_link_tag "application" %>
<%= javascript_include_tag "application" %>
<%= csrf_meta_tags %>
</head>
<body>
<%- flash.each do |name, msg| -%>
<%= content_tag :div, msg, :id => "flash_#{name}" if msg.is_a?(String) %>
<%- end -%>
<%= yield %>
</body>
</html>
</pre>
<h2>Haml for Rails 3.1</h2>
<p>If you are using Haml, remove <strong>app/views/layouts/application.html.erb</strong> and replace it with <strong>app/views/layouts/application.html.haml</strong>:</p>
<p>
<code>$ rm public/index.html</code>
</p>
<p>For Haml, the <strong>Rails 3.1</strong> modified application layout <strong>app/views/layouts/application.html.haml</strong> will look like this:</p>
<pre>
!!!
%html
%head
%title My App
= stylesheet_link_tag :application
= javascript_include_tag :application
= csrf_meta_tags
%body
- flash.each do |name, msg|
= content_tag :div, msg, :id => "flash_#{name}" if msg.is_a?(String)
= yield
</pre>
<h2><span class="caps">ERB</span> for Rails 3.0</h2>
<p>The <strong>Rails 3.0</strong> modified application layout <strong>app/views/layouts/application.html.erb</strong> will look like this:</p>
<pre>
<!DOCTYPE html>
<html>
<head>
<title>My App</title>
<%= stylesheet_link_tag :all %>
<%= javascript_include_tag :defaults %>
<%= csrf_meta_tag %>
</head>
<body>
<%- flash.each do |name, msg| -%>
<%= content_tag :div, msg, :id => "flash_#{name}" if msg.is_a?(String) %>
<%- end -%>
<%= yield %>
</body>
</html>
</pre>
<h2>Haml for Rails 3.0</h2>
<p>If you are using Haml, remove <strong>app/views/layouts/application.html.erb</strong> and replace it with <strong>app/views/layouts/application.html.haml</strong>:</p>
<p>
<code>$ rm public/index.html</code>
</p>
<p>For Haml, the <strong>Rails 3.0</strong> modified application layout <strong>app/views/layouts/application.html.haml</strong> will look like this:</p>
<pre>
!!!
%html
%head
%title My App
= stylesheet_link_tag :all
= javascript_include_tag :defaults
= csrf_meta_tag
%body
- flash.each do |name, msg|
= content_tag :div, msg, :id => "flash_#{name}" if msg.is_a?(String)
= yield
</pre>
</div><!-- class="content" -->
<div class="comments">
<div class="content wikistyle gollum">
<h2>Comments</h2>
</div>
<p>Is this helpful? Please "like" below. Question or suggestion? Please add a comment below. Got a correction or addition? You can edit this page <a href="https://github.com/railsapps/railsapps.github.com/wiki/_pages">on the wiki</a> or create a <a href="https://github.com/RailsApps/railsapps.github.com/issues">GitHub issue</a> to alert me.</p>
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<br />
<br />
<div class="credits">
<div class="content wikistyle gollum">
<h2>Credits</h2>
</div>
<p>Daniel Kehoe (<a href="http://danielkehoe.com/">http://danielkehoe.com/</a>) initiated the project and wrote some examples and tutorials.</p>
<p>Your contributions are welcome!</p>
</div><!-- class="credits" -->
<div class="admin">
<small>Corrections? Additions? You can edit this page <a href="https://github.com/railsapps/railsapps.github.com/wiki/_pages">on the wiki</a>.</small>
<div style="float: right;">
<small>Last edited by <b>Daniel Kehoe</b>, 2011-09-01 12:24:10</small>
</div>
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