From a84b84efaca02a0164c32a10df59f581eef16ac8 Mon Sep 17 00:00:00 2001
From: Aaron Patterson <aaron.patterson@gmail.com>
Date: Tue, 4 Jan 2011 14:09:35 -0800
Subject: require Psych if possible, use Psych output when enabled

---
 activesupport/lib/active_support/ordered_hash.rb | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

(limited to 'activesupport/lib')

diff --git a/activesupport/lib/active_support/ordered_hash.rb b/activesupport/lib/active_support/ordered_hash.rb
index 8e157d3af4..ac20988230 100644
--- a/activesupport/lib/active_support/ordered_hash.rb
+++ b/activesupport/lib/active_support/ordered_hash.rb
@@ -1,3 +1,8 @@
+begin
+  require 'psych'
+rescue LoadError
+end
+
 require 'yaml'
 
 YAML.add_builtin_type("omap") do |type, val|
@@ -20,9 +25,17 @@ module ActiveSupport
       "!tag:yaml.org,2002:omap"
     end
 
+    def encode_with(coder)
+      coder.represent_seq '!omap', map { |k,v| { k => v } }
+    end
+
     def to_yaml(opts = {})
+      if YAML.const_defined?(:ENGINE) && !YAML::ENGINE.syck?
+        return super
+      end
+
       YAML.quick_emit(self, opts) do |out|
-        out.seq(taguri, to_yaml_style) do |seq|
+        out.seq(taguri) do |seq|
           each do |k, v|
             seq.add(k => v)
           end
-- 
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