Question

I’m using Devise to handle users in a shopping application. What I want to do is create a new cart each time a user signs in (and ideally, destroy the same cart each time a user signs out, but I’ll just stick to that first part for this question).

So far, I’ve looked at this question: Devise call backs

And I came up with this:

class ApplicationController < ActionController::Base
  helper :all
  protect_from_forgery

  before_filter :fetch_categories

  .
  .
  .

  Warden::Manager.after_authentication do
    session[:cart_id] ||= Cart.create!.id
  end
end

…But clearly this isn’t correct, because I’m getting this error:

NameError in Devise::SessionsController#create

undefined local variable or method `session' for ApplicationController:Class

Is there some other way I can tell the application controller to respond to a user sign in, or should I be putting this code elsewhere (other than the application controller)? Thanks for any help.

Answer 1

Glancing at the docs, it looks like you can do something like this:

Warden::Manager.after_authentication do |user, auth, opts|
  auth.session[:cart_id] ||= Cart.create!.id
end