lib/mongoid/genesis.rb in mongoid-genesis-0.0.2 vs lib/mongoid/genesis.rb in mongoid-genesis-0.0.3

@@ -25,11 +25,15 @@
       self.genesis.reverse
     end
 
     def write_and_preserve_attribute(field_name, value)
       init_genesis if not self.genesis
-      self.genesis.preserve field_name
 
-      self.write_attribute(field_name, value)
+      if value and self.genesis.read_attribute(field_name) == value
+        self.restore_genesis(field_name)
+      else
+        self.genesis.preserve field_name
+        self.write_attribute(field_name, value)
+      end
     end
   end
 end