lib/mongoid/fields.rb in mongoid-2.4.7 vs lib/mongoid/fields.rb in mongoid-2.4.8

@@ -90,11 +90,13 @@
     # @since 2.4.0
     def apply_default(name)
       unless attributes.has_key?(name)
         if field = fields[name]
           default = field.eval_default(self)
-          attribute_will_change!(name)
-          attributes[name] = default
+          unless default.nil?
+            attribute_will_change!(name)
+            attributes[name] = default
+          end
         end
       end
     end
 
     # Apply all the defaults at once.