Embed documents

I am trying to use your project with Embed documents

If I update embed document inside parent with ```with_lock``` it is not updated while saving parent 
Parent embeds_many children. I take first of array and modify it with parent option

```
#self.with_lock do
child.status = 2
parent.option = 4
parent.save!
#end
```

I works with comment, but does not work without