How do I save information to a model on Devise.sessions#destroy?

Question

I'm using Devise and Piggybak for a Rails project and Piggybak uses a cookie named cart to store the user cart. The problem is that Piggybak doesn't destroy the cookie on user sign_out so, if I sign_in with another user, it uses the same cookie and therefore, the same cart.

I want to solve that storing that cookie value into my user model, enabling it to get back his cart on another sign_in. What I did was overriding the Devise.sessions#destroy method to save the cookie value on user and destroy the cookie:

# app/controllers/users/sessions_controller.rb

class Users::SessionsController < Devise::SessionsController

  def destroy
    current_user.add_cart_cookie(cookies['cart']['value'])
    cookies['cart'] = { value: '', path: '/' }
    super
  end
end

Routing it right in the routes:

# config/routes.rb

...

devise_for :users, controllers: { sessions: 'users/sessions' }

...

And creating the method add_cart_cookie to my user model:

# app/models/user.rb

class User < ActiveRecord::Base

...

  def add_cart_cookie(value)
    self.cart_cookie = value
  end

...

end

But this is not working, it destroy the cookie but don't save it on the user model. Why is this happening?

you gotta save the user instance (in your `add_cart_cookie` method. — Marian Theisen, Apr 25 '13 at 15:35
Do I have tu use `self.save!`? How can I pass the password and the password_confirmation for the authentication before save? — Vinicius Spader, Apr 25 '13 at 16:53

score 0 · Accepted Answer · answered Apr 25 '13 at 18:11

Did it, thank you @Marian.

What I did was change my add_cookie_cart method to accept another parameter:

# app/models/user.rb

class User < ActiveRecord::Base

...

  def add_cart_cookie(value, password)
    self.cart_cookie = value
    self.password = password
    self.password_confirmation = password
    self.save
  end

...

end

And changed my session#destroy accordingly:

class Users::SessionsController < Devise::SessionsController

  def destroy
    current_user.add_cart_cookie(cookies['cart']['value'], current_user.password)
    cookies['cart'] = { value: '', path: '/' }
    super
  end
end

How do I save information to a model on Devise.sessions#destroy?

1 Answers1