lib/attach_it/attachment_options.rb in mm-attach-it-0.2.0 vs lib/attach_it/attachment_options.rb in mm-attach-it-0.2.1

@@ -103,10 +103,10 @@
     end
   end
 
   private
   def interpolate(source = nil, style_name = nil)
-    result = source.gsub(/\:rails_root/, Rails.root)
+    result = source.gsub(/\:rails_root/, Rails.root.to_s)
     result.gsub!(/\:environment/, Rails.env)
     result.gsub!(/\:filename/, @filename.nil? ? '' : @filename)
     result.gsub!(/\:extension/, @extension.nil? ? '' : @extension)
     result.gsub!(/\:style/, style_name.to_s)
     result.gsub!(/\:id/, @object_id)