将用户重定向到controllers方法中的登录页面（如果否则阻止）-Rails 4，Ruby

Question

I want to be able to redirect a guest user to a Devise signin/login page after he/she clicked some links for 5 times. I counted clicks and I have else block where I am supposed to redirect guest to a sign up page but nothing happens. Log says:

Started GET "/users/sign_in" for 127.0.0.1 at 2014-02-21 14:06:58 +0100
Processing by Devise::SessionsController#new as */*
Rendered /home/.rvm/gems/ruby-2.0.0-preview2/gems/devise-3.2.2/app/views/devise/shared/_links.erb (3.6ms)
Rendered /home/.rvm/gems/ruby-2.0.0-preview2/gems/devise-3.2.2/app/views/devise/sessions/new.html.erb within layouts/application (18.3ms)
Completed 200 OK in 49ms

But I don't get redirected anywhere. Is there a way to do this?

Controller method count:

def count
 user = guest_user
  if ( params[:first_link] || params[:second_link] )
    user.increment!(:counter)
  else
   redirect_to new_user_session_url # this is the problem
  end
end

Any help would be appreciated.

Update:

function count(link_id) {
  $.ajax({
   type: 'GET',
   format: 'json',
   url: '/count/' + link_id,
   success: function(data) { 
    if (data.counter == 5) {
      document.location.href = 'new_user_session_path';
    }
   }
  });
  return false;
}

And the error I get is: No route matches [GET] "/new_user_session_path" but the route is actually there: new_user_session_path GET /users/sign_in(.:format) devise/sessions#new

Answer 1

You are not checking the counter anywhere, you could do something like this:

def count
 user = guest_user
  if user.counter == 5                 # Assuming that you have counter property on User   
    user.counter = 0                   # reset the counter  
    redirect_to new_user_session_url **#this is the problem**
  else
    if ( params[:first_link] || params[:second_link] )
      user.increment!(:counter)
    end
  end
end

BUT As Marek suggested, you should think about resolving this on client side using JavaScript rather than making server calls.

Answer 2

Instead of

document.location.href = 'new_user_session_path';

You should have:

document.location.href = '<%= new_user_session_path -%>';

This way, Rails will automatically generate proper URL for you using new_user_session_path helper.