lib/spread2rdf/attributes.rb in spread2rdf-0.0.1pre.1 vs lib/spread2rdf/attributes.rb in spread2rdf-0.0.1

@@ -4,9 +4,10 @@
 
     module ClassMethods
       def attributes
         if superclass.respond_to?(:attributes) and
             (super_attributes = superclass.attributes).is_a? Hash
+          @attributes ||= {}
           @attributes.reverse_merge(super_attributes)
         else
           @attributes
         end
       end