From 2cef2d411a20b89b71fb76876c33b331f94d0cc5 Mon Sep 17 00:00:00 2001
From: Joshua Wehner <joshua.wehner@gmail.com>
Date: Thu, 3 Mar 2011 15:43:42 -0500
Subject: Methods that return nil should not be considered YAML

---
 activemodel/lib/active_model/serializers/xml.rb | 1 +
 1 file changed, 1 insertion(+)

(limited to 'activemodel/lib')

diff --git a/activemodel/lib/active_model/serializers/xml.rb b/activemodel/lib/active_model/serializers/xml.rb
index d4295e6afe..19639b1363 100644
--- a/activemodel/lib/active_model/serializers/xml.rb
+++ b/activemodel/lib/active_model/serializers/xml.rb
@@ -33,6 +33,7 @@ module ActiveModel
         protected
 
           def compute_type
+            return if value.nil?
             type = ActiveSupport::XmlMini::TYPE_NAMES[value.class.name]
             type ||= :string if value.respond_to?(:to_str)
             type ||= :yaml
-- 
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