lib/hydra/datastream/rights_metadata.rb in hydra-access-controls-6.4.1 vs lib/hydra/datastream/rights_metadata.rb in hydra-access-controls-6.4.2

@@ -168,10 +168,10 @@
 
       attr_reader :embargo_release_date
       def embargo_release_date=(release_date)
         release_date = release_date.to_s if release_date.is_a? Date
         begin
-          Date.parse(release_date)
+          release_date.nil? || Date.parse(release_date)
         rescue 
           return "INVALID DATE"
         end
         self.update_values({[:embargo,:machine,:date]=>release_date})
       end