From a16fa9abfd0b34026b04f4ceeb0b75e63609a74a Mon Sep 17 00:00:00 2001
From: David Heinemeier Hansson <david@loudthinking.com>
Date: Sat, 7 Dec 2013 15:00:35 -0800
Subject: [PATCH] Allow code execution in case no variant has been set with
 variant.none

---
 .../lib/action_controller/metal/mime_responds.rb |  9 +++++----
 .../test/controller/mime/respond_to_test.rb      | 16 ++++++++++++++++
 2 files changed, 21 insertions(+), 4 deletions(-)

diff --git a/actionpack/lib/action_controller/metal/mime_responds.rb b/actionpack/lib/action_controller/metal/mime_responds.rb
index 54d3be68f0..4993583c29 100644
--- a/actionpack/lib/action_controller/metal/mime_responds.rb
+++ b/actionpack/lib/action_controller/metal/mime_responds.rb
@@ -196,9 +196,10 @@ module ActionController #:nodoc:
     # Respond to variants in the action just like you respond to formats:
     #
     #   respond_to do |format|
-    #     format.html do |html|
-    #       html.tablet # renders app/views/projects/show.html+tablet.erb
-    #       html.phone { extra_setup; render ... }
+    #     format.html do |variant|
+    #       variant.tablet # renders app/views/projects/show.html+tablet.erb
+    #       variant.phone { extra_setup; render ... }
+    #       variant.none  { special_setup } # executed only if there is no variant set
     #     end
     #   end
     #
@@ -465,7 +466,7 @@ module ActionController #:nodoc:
         end
 
         def method_missing(name)
-          yield if name == @variant
+          yield if name == @variant || (name == :none && @variant.nil?)
         end
       end
     end
diff --git a/actionpack/test/controller/mime/respond_to_test.rb b/actionpack/test/controller/mime/respond_to_test.rb
index 2b6c8739af..cd93043360 100644
--- a/actionpack/test/controller/mime/respond_to_test.rb
+++ b/actionpack/test/controller/mime/respond_to_test.rb
@@ -166,6 +166,15 @@ class RespondToController < ActionController::Base
     end
   end
 
+  def variant_plus_none_for_format
+    respond_to do |format|
+      format.html do |variant|
+        variant.phone { render text: "phone" }
+        variant.none  { render text: "none" }
+      end
+    end
+  end
+
   protected
     def set_layout
       case action_name
@@ -544,4 +553,11 @@ class RespondToControllerTest < ActionController::TestCase
     assert_equal "text/html", @response.content_type
     assert_equal "tablet", @response.body
   end
+
+
+  def test_no_variant_in_variant_setup
+    get :variant_plus_none_for_format
+    assert_equal "text/html", @response.content_type
+    assert_equal "none", @response.body
+  end
 end