I have added a field to the sign-up form that is based on a different model, see http://stackoverflow.com/questions/3544265/how-do-i-use-nested-attributes-with-the-devise-model for the gory details. This part is working fine.
The problem now is when I save, it is failing in the create action of the registrations controller that is supplied by devise with an Activerecord::UnknownAttributeError on this field (company).
I am assuming I need to override the registrations controller, or is there a better/easier way I should be approaching this?