Sign in and sign out

Rails
1

Hello,

My name is Javier Molina and I am programming a simple app to manage
users
in Ruby on Rails.
I read RoR Tutorial
from http://ruby.railstutorial.org/chapters/sign-in-sign-out#top to sign
in
and sign out my app. I implemented the same configuration as it said:

sessions_helper.rb
def sign_out
self.current_user = nil
cookies.delete(:remember_token)
end

sessions_controller.rb
def destroy
sign_out
redirect_to root_url
end

application.html.erb
<%= link_to “Sign out”, signout_path, method: “delete” %>

routes.rb
match ‘/signout’, to: ‘sessions#destroy’, via: ‘delete’

I am able to sign in, but I can’t sign out. The problem is that there
are
not any log error and I don’t know what to do.

Any ideas?

Thanks!