Ruby on Rails - Heroku problems & User sign-in - ruby-on-rails

Question

First post here on SO. I am relatively new to Ruby on Rails and I have been reading through Michael Hartl's book, "Ruby on Rails Tutorial - Learn by Example". However, I have the following problems when running my application that I would be gracious to get solved.
1) When trying to run my application in 'production' mode, I have updated the file 'config/environments.rb' as follows:
# force Rails into production mode when
# you don't control web/app server and can't set it the proper way
ENV['RAILS_ENV'] ||= 'production'
However, when I run the application, I can still see the debugger facility present from the file 'app/views/layouts/application.html.erb'
<!-- Debug applies only to 'development' environment -->
<%= debug(params) if Rails.env.development? -%>
<!-- as determined by "if Rails.env.development?" -->
This leads me to believe that I am still running the application in development mode.
2) For those that have already asked questions about the signin_path problem, I still cannot see a solution that fixes it for me. I am able to sign up users, then automatically redirect them to their profile space. However, the navigation menu does not change accordingly:
<nav class="round">
<ul>
<li><%= link_to "Home", root_path -%></li>
<li><%= link_to "Support", support_path -%></li>
<% if signed_in? %>
<li><%= link_to "Users", users_path -%></li>
<li><%= link_to "Profile", current_user -%></li>
<li><%= link_to "Settings", edit_user_path(current_user) -%></li>
<li><%= link_to "Sign out", signout_path, :method => :delete -%></li>
<% else %>
<li><%= link_to "Sign in", signin_path -%></li>
<% end %>
Here is the code from the 'app/helpers/sessions_helper.rb' file:
def current_user # GET current_user
#current_user ||= user_from_remember_token
end
def signed_in?
!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
Any help with this is most welcome. I am currently trying to host my application Heroku, but not getting the support I need unfortunately.
Cheers.

Answer 1

check the link if the question is related to heroku server . And if you want to run on local , rails s -p3001 -e production may work

Answer 2

It seems like your signed_in? helper returns not what you want. So at first debug what signed_in? returns like this:
<%= signed_in? %>
or you can raise error with signed_in? as a message.
Also it seems like you forget current_user setter method, which should be called after session is created. You need to have three methods like these:
def current_user
#current_user ||= User.find_by_id(session[:user_id])
end
def user_signed_in?
!!current_user
end
def current_user=(user)
#current_user = user
session[:user_id] = if #current_user ? current_user.id : nil
end
I recommend you to move this methods to ApplicationController as protected methods.
And one last advice:
!self.current_user.nil?
looks really bad. Try to avoid using bang!, this should work for you:
self.current_user