From 4379712e856d77b6f3d8551f3f904b29921db49d Mon Sep 17 00:00:00 2001
From: Matthew McEachen <matthew+github@mceachen.org>
Date: Fri, 7 Jun 2013 21:11:46 -0700
Subject: [PATCH] fix use_attr_accessible?

---
 lib/closure_tree/support.rb | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/closure_tree/support.rb b/lib/closure_tree/support.rb
index 3f6f03f7..883eb22c 100644
--- a/lib/closure_tree/support.rb
+++ b/lib/closure_tree/support.rb
@@ -23,7 +23,8 @@ def connection
     def use_attr_accessible?
       ActiveRecord::VERSION::MAJOR == 3 &&
         defined?(ActiveModel::MassAssignmentSecurity) &&
-        model_class.accessible_attributes.empty?
+        model_class.respond_to?(:accessible_attributes) &&
+        model_class.accessible_attributes.present?
     end
 
     def include_forbidden_attributes_protection?