Added AR:B#dup method for duplicationg object without frozen attributes [#2859 state:resolved]

Signed-off-by: Yehuda Katz + Carl Lerche <ykatz+clerche@engineyard.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/activerecord/lib/active_record/base.rb b/activerecord/lib/active_record/base.rb
index ff5a836b52..deab56e219 100755
--- a/activerecord/lib/active_record/base.rb
+++ b/activerecord/lib/active_record/base.rb
@@ -2870,6 +2870,13 @@ module ActiveRecord #:nodoc:
         @attributes.frozen?
       end
 
+      # Returns duplicated record with unfreezed attributes.
+      def dup
+        obj = super
+        obj.instance_variable_set('@attributes', instance_variable_get('@attributes').dup)
+        obj
+      end
+
       # Returns +true+ if the record is read only. Records loaded through joins with piggy-back
       # attributes will be marked as read only since they cannot be saved.
       def readonly?