From 4ae9a26d41f3d8006b5eb7930911c634670e28e2 Mon Sep 17 00:00:00 2001
From: Josh McArthur <joshua.mcarthur@gmail.com>
Date: Tue, 2 Jul 2013 14:18:20 +1200
Subject: [PATCH] Restrict changed attributes to attributes that have a
 corresponding database column

---
 lib/paper_trail/has_paper_trail.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/paper_trail/has_paper_trail.rb b/lib/paper_trail/has_paper_trail.rb
index 57f86970f..84ba280da 100644
--- a/lib/paper_trail/has_paper_trail.rb
+++ b/lib/paper_trail/has_paper_trail.rb
@@ -262,7 +262,7 @@ def item_before_change
         end
         previous.tap do |prev|
           prev.id = id
-          changed_attributes.except(*self.class.paper_trail_options[:skip]).each { |attr, before| prev[attr] = before }
+          changed_attributes.select { |k,v| self.class.column_names.include?(k) }.each { |attr, before| prev[attr] = before }
         end
       end