Formtastic is able to infer from ActiveRecord models which fields are required and mark them with an asterisk. It is not able to do this with DM 1.2.0. (marks all fields as required). However, the following monkeypatch makes it work in our app.
What would be the best way to contribute this, given that you're now working on 1.3.0 and 2.0?
validators[attribute.to_sym] || 
@kind ||= name.split('::').last.sub(/Validator$/, '').downcase.to_sym