How to detect if Rails / Devise current_user is a guest user - ruby-on-rails

Question

I've got a Rails app running with "real" users and "guest" users via devise (https://github.com/plataformatec/devise/wiki/How-To:-Create-a-guest-user).
Most of the time they can be used indistinguishably, but occasionally I want to be able to tell a "real" logged in user from a "guest" user who didn't log in or create an account yet.
Is there a standard way to do this? (There must be, right?)
Here's a sample of what I'm seeing in current_user:
=> #<User:0x007fb011620c78
id: 30,
email: "guest_143829190430#example.com",
encrypted_password:
"$2a$10$MJr8M3JA6/wYCoOz0oBTseoA3zVnLUceY7BeJLRnLgeXfKNMW/k/S",
reset_password_token: nil,
reset_password_sent_at: nil,
remember_created_at: nil,
sign_in_count: 1,
current_sign_in_at: Thu, 30 Jul 2015 16:31:44 CDT -05:00,
last_sign_in_at: Thu, 30 Jul 2015 16:31:44 CDT -05:00,
current_sign_in_ip: "127.0.0.1",
last_sign_in_ip: "127.0.0.1",
created_at: Thu, 30 Jul 2015 16:31:44 CDT -05:00,
updated_at: Thu, 30 Jul 2015 16:31:44 CDT -05:00,
first_name: "guest",
last_name: "guest",
I could look at first_name / last_name / email, but that feels flimsy, and I could look for session[:guest_user_id] in the session, and that seems like perhaps the way to go, but it just feels like there should be a built in .is_guest? or something, and I'd rather use that than write my own.
(My Google-ing and exploration of their codebase has not yet turned up anything... Might have more once I can pull their repo and grep...)
Thanks all!
Best I've got so far would be something like:
def is_guest?
current_user.id == session[:guest_user_id] if current_user && session[:guest_user_id]
end

Answer 1

Without delving into all of the available code, I would suggest that the beginnings of thecurrent_or_guest_user method describe the checks that are required. I would create a method from these along the lines of:
def is_guest_user?
# Someone is logged in AND (we have a guest id AND that id matches the current user)
current_user && (session[:guest_user_id] && session[:guest_user_id] == current_user.id)
end
I would add this to the User model. Based on that current_or_guest_user method I don't expect you'll find anything else built in (as surely they would have used it in that method).