Ruby on Rails: gem devise session logged in

I have two tables, company and employee, so I would like when I register an employee, his registration was also for the company that was already logged, that is, without having to have to choose which company of that employee. How would I do this in ruby on rails? I'm using gem devise to login.

I wish to help but I can't figure out what you want to do. Use short and simple sentences to describe:

• Your current setup
• Your desired user flow
• What you're having a problem with
• Show code if you have any