How To: Use Devise generated method and filters for controllers

$ rails generate devise User

• authenticate_user! – Signs user in or redirect
• user_signed_in? – Checks whether there is an user signed in or not
• current_user – Current signed in user (e.g. current_user.email would give you the e-mail of the current signed in user)
• user_session – Session data available only to the user scope
• before_filter :authenticate_user! # Tell devise to use :user map

$ rails generate devise Admin

• authenticate_admin! – Signs admin in or redirect
• admin_signed_in? – Checks whether there is an admin signed in or not
• current_admin – Current signed in admin
• admin_session – Session data available only to the admin scope
• before_filter :authenticate_admin! # Tell devise to use :admin map

Also, you may want to use:

• anybody_signed_in? signed_in? – Check if the any scope is signed in session. The default argument for this helper is scope=nil, you can pass other scopes to check if admin, user, etc. is signed in. (see this line of code)