Reading "created_at" from XML

Rails
1

I’m having trouble printing the “created_at” from the parent application
(I’m using ActiveResource).

I noticed the XML document replaces all underscores with dashes (i.e.
created_at is transformed to created-at).

Other data – like post.title, post.body, post.author – print out fine;
only post.created_at doesn’t.

Any idea on how to correctly print out post.created_at from the XML?