From 139609355f0b2e87a547f6520f2bd5d5c2702545 Mon Sep 17 00:00:00 2001
From: Tema Bolshakov <abolshakov@spbtv.com>
Date: Fri, 29 Aug 2014 13:01:01 +0400
Subject: [PATCH] Object.const_get differs on 2.0 and 2.1.2. So rescue from
 NameError

---
 lib/active_model/serializer.rb | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/active_model/serializer.rb b/lib/active_model/serializer.rb
index 00d10767..373e9078 100644
--- a/lib/active_model/serializer.rb
+++ b/lib/active_model/serializer.rb
@@ -80,8 +80,10 @@ module ActiveModel
       adapter_class = case config.adapter
                       when Symbol
                         class_name = "ActiveModel::Serializer::Adapter::#{config.adapter.to_s.classify}"
-                        if Object.const_defined?(class_name)
+                        begin
                           Object.const_get(class_name)
+                        rescue NameError
+                          nil
                         end
                       when Class
                         config.adapter