ruby - Can I execute custom actions after successful sign in with Devise?

Question

I have an app that has basic Devise authentication. After sign in, I would like to look up the user account (user belongs_to account, account has_many users), and store that in the session so that it is available like the @current_user.

What is the rails way of storing session in formation like this? Is there a hook I can use with Devise to execute code after successful sign-in?

Answer 1

Actually, the accepted answer does not work properly in case of combined Omniauth and Database login modules in Devise.

The native hook that is executed after every successfull sign in action in Devise (disregarding the user authentication channel) is warden.set_user (called by devise sign_in helper: http://www.rubydoc.info/github/plataformatec/devise/Devise/Controllers/SignInOut#sign_in-instance_method).

In order to execute custom action after successfull user sign in (according to Warden Docs: https://github.com/hassox/warden/wiki/Callbacks), put this into initializer (eg. after_sign_in.rb in config/initializers)

Warden::Manager.after_set_user except: :fetch do |user, auth, opts|
  #your custom code
end

Update 2015-04-30: Thanks to @seanlinsley suggestion (see comments below), I have corrected the answer to include except: :fetch in order to trigger the callback only when user is authenticated and not every time it is set.

Update 2018-12-27 Thanks to @thesecretmaster for pointing out that Warden now has built-in callbacks for executing your own code on after_authentication https://github.com/wardencommunity/warden/wiki/Callbacks#after_authentication