lib/scoped_id/concern.rb in scoped_id-0.0.1 vs lib/scoped_id/concern.rb in scoped_id-0.0.2

@@ -21,10 +21,10 @@
 
         scoped_ids_definitions << ScopedIdDefinition.new(attr_name, scope)
 
         attr_readonly attr_name
 
-        validates_uniqueness_of attr_name, scope: scope
+        validates_uniqueness_of attr_name, scope: scope, allow_nil: true
       end
 
       def scoped_ids_definitions
         @scoped_ids_definitions ||= []
       end