From 89e40987d8215516b97df31a551b2562d4e01493 Mon Sep 17 00:00:00 2001
From: Ryan Bates <ryan@railscasts.com>
Date: Fri, 25 Mar 2011 14:26:33 -0700
Subject: [PATCH] make sure ActiveRecord::Relation is defined before checking
 conditions against it so Rails 2 is supported again - closes #312

---
 lib/cancan/model_adapters/active_record_adapter.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/cancan/model_adapters/active_record_adapter.rb b/lib/cancan/model_adapters/active_record_adapter.rb
index 22fb669..4110847 100644
--- a/lib/cancan/model_adapters/active_record_adapter.rb
+++ b/lib/cancan/model_adapters/active_record_adapter.rb
@@ -99,7 +99,7 @@ module CanCan
 
       def override_scope
         conditions = @rules.map(&:conditions).compact
-        if conditions.any? { |c| c.kind_of?(ActiveRecord::Relation) }
+        if defined?(ActiveRecord::Relation) && conditions.any? { |c| c.kind_of?(ActiveRecord::Relation) }
           if conditions.size == 1
             conditions.first
           else