gistfile1.txt

- devise_for module_name
- Devise::Mapping
  - @scoped_path = options[:as] ? "#{options[:as]}/#{name}" : name.to_s
  - @class_name = (options[:class_name] || name.to_s.classify).to_s

```ruby
# Devise::ConfirmationsController#show
def show
  self.resource = resource_class.confirm_by_token(params[:confirmation_token])

  if resource.errors.empty?
    set_flash_message(:notice, :confirmed) if is_navigational_format?
    sign_in(resource_name, resource)
    respond_with_navigational(resource){ redirect_to after_confirmation_path_for(resource_name, resource) }
  else
    respond_with_navigational(resource.errors, :status => :unprocessable_entity){ render :new }
  end
end
`