lib/kasket/write_mixin.rb in kasket-0.5.4 vs lib/kasket/write_mixin.rb in kasket-0.5.5

@@ -26,10 +26,10 @@
 
       def kasket_keys
         attribute_sets = [attributes.symbolize_keys]
 
         if changed?
-          old_attributes = Hash[changes.map {|attribute, values| [attribute, values[0]]}].symbolize_keys
+          old_attributes = Hash[*changes.map {|attribute, values| [attribute, values[0]]}.flatten].symbolize_keys
           attribute_sets << old_attributes.reverse_merge(attribute_sets[0])
         end
 
         keys = []
         self.class.kasket_indices.each do |index|