From dd5924d8ca06334898831ffede11efe2c264b5f0 Mon Sep 17 00:00:00 2001
From: Neeraj Singh <neerajdotname@gmail.com>
Date: Fri, 25 Jun 2010 14:13:47 -0400
Subject: added to_xml section for controller

---
 .../guides/source/action_controller_overview.textile  | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

(limited to 'railties')

diff --git a/railties/guides/source/action_controller_overview.textile b/railties/guides/source/action_controller_overview.textile
index 9d8426b5de..038ca903c1 100644
--- a/railties/guides/source/action_controller_overview.textile
+++ b/railties/guides/source/action_controller_overview.textile
@@ -338,6 +338,25 @@ end
 
 Note that while for session values you set the key to +nil+, to delete a cookie value you should use +cookies.delete(:key)+.
 
+h3. Rendering xml and json data
+
+ActionController makes it extremely easy to render +xml+ or +json+ data. If you generate a controller using scaffold then your controller would look something like this.
+
+<ruby>
+class UsersController < ApplicationController
+  def index
+    @users = User.all
+    respond_to do |format|
+      format.html # index.html.erb
+      format.xml  { render :xml => @users}
+    end
+  end
+end
+</ruby>
+
+Notice that in the above case code is <tt>render :xml => @users</tt> and not <tt>render :xml => @users.to_xml</tt>. That is because if the input is not string then rails automatically invokes +to_xml+ . 
+
+
 h3. Filters
 
 Filters are methods that are run before, after or "around" a controller action. 
-- 
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