what is the devise_mapping variable and how can I include it?

Question

I\'m trying to implement authentication with Devise in my Rails application (Rails 2.3.8, Devise 1.0.7, mongrel running on Windows Vista). But I\'m getting the following error:<

Answer 1

You can add helper methods to ApplicationHelper. Make sure to use the proper model name (in my case it's :user representing the User model).

def devise_mapping
  Devise.mappings[:user]
end

def resource_name
  devise_mapping.name
end

def resource_class
  devise_mapping.to
end

Update 1/28/2014

The master branch of Devise shows that devise_mapping is now stored in the request:

# Attempt to find the mapped route for devise based on request path
def devise_mapping
  @devise_mapping ||= request.env["devise.mapping"]
end

And resource_name is aliased as scope_name as well. See devise_controller.rb for more info.