From 78788ad72390806803adf38d8847fd0c858154f6 Mon Sep 17 00:00:00 2001
From: Gaurish Sharma <contact@gaurishsharma.com>
Date: Sat, 19 Jul 2014 20:06:59 +0530
Subject: Performed Returns true if redirect/render has happened

---
 actionpack/lib/action_controller/metal.rb | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/actionpack/lib/action_controller/metal.rb b/actionpack/lib/action_controller/metal.rb
index 9a427ebfdb..0fa0357bae 100644
--- a/actionpack/lib/action_controller/metal.rb
+++ b/actionpack/lib/action_controller/metal.rb
@@ -182,7 +182,10 @@ module ActionController
       body = [body] unless body.nil? || body.respond_to?(:each)
       super
     end
-
+    
+    # Tests if render or redirect already happended. Could be useful when used as a 
+    # conditional to <tt>return</tt> early out a controller action to avoid <tt>AbstractController::DoubleRenderError</tt>
+    # example in case of multiple render/redirects in single controller action
     def performed?
       response_body || (response && response.committed?)
     end
-- 
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