Rails - Sep 2010 - Action Controller Error: undefined local variable or method `current_user'

Newbie learning Rails. I''m currently on Chp9 here:
http://railstutorial.org/chapters/sign-in-sign-out#top

At the end of the tutorial, rails is erroring (see below). being new
to Rails and after having checked the tutorial... How do you resolve
this kind of error. It''s saying current_user is not defined, and it is
supposed to be defined  with/Sites/sample_app/app/helpers/
sessions_helper.rb


NameError in Pages#home

Showing /Users/iamme/Sites/sample_app/app/views/layouts/
_header.html.erb where line #6 raised:

undefined local variable or method `current_user'' for #<#<Class:
0x103371258>:0x10336be70>
Extracted source (around line #6):

3:   <nav class="round">
4:     <ul>
5:       <li><%= link_to "Home", root_path %></li>
6:       <% if signed_in? %>
7:       <li><%= link_to "Profile", current_user
%></li>
8:       <% end %>
9:       <li><%= link_to "Help", help_path %></li>
Trace of template inclusion: app/views/layouts/application.html.erb

Rails.root: /Users/iamme/Sites/sample_app

Application Trace | Framework Trace | Full Trace
app/helpers/sessions_helper.rb:13:in `signed_in?''
app/views/layouts/_header.html.erb:6:in
`_app_views_layouts__header_html_erb___1701013666_2174344740_524030''
app/views/layouts/application.html.erb:10:in
`_app_views_layouts_application_html_erb__1439570095_2174436720_0''


---- END

sessions_helper.rb CODE:

module SessionsHelper

  def sign_in(user)
    cookies.permanent.signed[:remember_token] = [user.id, user.salt]
    current_user = user
  end

  def current_user=(user)
    @current_user = user
  end

  def signed_in?
    !current_user.nil?
  end

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

	private

		def user_from_remember_token
		  User.authenticate_with_salt(*remember_token)
		end

		def remember_token
		  cookies.signed[:remember_token] || [nil, nil]
		end

end


--- END

thanks

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Ok figured it out, the sessions_helper.rb needs to look like this:


module SessionsHelper

	def sign_in(user)
		cookies.permanent.signed[:remember_token] = [user.id, user.salt]
		current_user = user
	end

  def current_user=(user)
    @current_user = user
  end

	def current_user
		@current_user ||= user_from_remember_token
	end

  def signed_in?
    !current_user.nil?
  end

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

	private

		def user_from_remember_token
		  User.authenticate_with_salt(*remember_token)
		end

		def remember_token
		  cookies.signed[:remember_token] || [nil, nil]
		end

end



On Sep 3, 4:19 pm, nobosh
<bhellm...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> Newbie learning Rails. I''m currently on Chp9
here:http://railstutorial.org/chapters/sign-in-sign-out#top
>
> At the end of the tutorial, rails is erroring (see below). being new
> to Rails and after having checked the tutorial... How do you resolve
> this kind of error. It''s saying current_user is not defined, and
it is
> supposed to be defined  with/Sites/sample_app/app/helpers/
> sessions_helper.rb
>
> NameError in Pages#home
>
> Showing /Users/iamme/Sites/sample_app/app/views/layouts/
> _header.html.erb where line #6 raised:
>
> undefined local variable or method `current_user'' for
#<#<Class:
> 0x103371258>:0x10336be70>
> Extracted source (around line #6):
>
> 3:   <nav class="round">
> 4:     <ul>
> 5:       <li><%= link_to "Home", root_path
%></li>
> 6:       <% if signed_in? %>
> 7:       <li><%= link_to "Profile", current_user
%></li>
> 8:       <% end %>
> 9:       <li><%= link_to "Help", help_path
%></li>
> Trace of template inclusion: app/views/layouts/application.html.erb
>
> Rails.root: /Users/iamme/Sites/sample_app
>
> Application Trace | Framework Trace | Full Trace
> app/helpers/sessions_helper.rb:13:in `signed_in?''
> app/views/layouts/_header.html.erb:6:in
>
`_app_views_layouts__header_html_erb___1701013666_2174344740_524030''
> app/views/layouts/application.html.erb:10:in
> `_app_views_layouts_application_html_erb__1439570095_2174436720_0''
>
> ---- END
>
> sessions_helper.rb CODE:
>
> module SessionsHelper
>
>   def sign_in(user)
>     cookies.permanent.signed[:remember_token] = [user.id, user.salt]
>     current_user = user
>   end
>
>   def current_user=(user)
>     @current_user = user
>   end
>
>   def signed_in?
>     !current_user.nil?
>   end
>
>   def sign_out
>     cookies.delete(:remember_token)
>     self.current_user = nil
>   end
>
>         private
>
>                 def user_from_remember_token
>                   User.authenticate_with_salt(*remember_token)
>                 end
>
>                 def remember_token
>                   cookies.signed[:remember_token] || [nil, nil]
>                 end
>
> end
>
> --- END
>
> thanks
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