mongoid/mongoid — pull request #2195 by jpmckinney (2012-07-13 02:57:34+00:00)
Title: Is it by design that saving an embedded document doesn't update timestamps on the parent?

In the spec, `#save` is called on the parent. If I change the spec (in this commit) to call `#save` on the child, `updated_at` does not change on the parent.