How to add or remove a record in database based on user login/logout, I am using Devise gem for Ruby on Rails?

Question

I have certain user settings which I need to load when user logs in & destroy his custom settings after he logs out. I am using Devise gem. Also I intend to keep this settings record id in Rails session for easy access through out the application.

when the user logs out, I want to do something like this:

Setting.delete(session[:settings_id])

where Setting is my Model class, and I am holding the currently loaded settings_id in session as session[:settings_id] = Settings.where(:conditions => hash).id

then when the user logs out, I will have to delete the record from my settings table using

    Setting.delete(session[:settings_id]),

since I already have currently loaded settings_id kept in session. How can I do it alongside Devise ?

Answer 1

Devise is build upon warden which provides some callbacks you may use:

Warden::Manager.before_logout do |user, auth, opts|
  Setting.delete(auth.session[:settings_id])
end