lib/repeatable/expression/date.rb in repeatable-0.4.0 vs lib/repeatable/expression/date.rb in repeatable-0.5.0

@@ -17,10 +17,22 @@
       end
 
       protected
 
       def attributes
-        Hash[instance_variables.map { |name| [name[1..-1].to_sym, instance_variable_get(name)] }]
+        instance_variables.each_with_object({}) do |name, hash|
+          key = name.to_s.gsub(/^@/, '').to_sym
+          hash[key] = normalize_attribute_value(instance_variable_get(name))
+        end
+      end
+
+      def normalize_attribute_value(value)
+        case value
+        when ::Date
+          value.to_s
+        else
+          value
+        end
       end
     end
   end
 end