Rails Michael Hartl Tutorial + Devise current_user? - ruby-on-rails

Question

I am trying to implement the follow actions from M. Hartl's tutorial in my rails composer, devise app.
But for some reason i get this error
undefined method `current_user?' for
when using this code
<% unless current_user?(#user) %>
<div id="follow_form">
<% if current_user.following?(#user) %>
<%= render 'unfollow' %>
<% else %>
<%= render 'follow' %>
<% end %>
</div>
<% end %>
Any idea why?
Thanks

Answer 1

Devise gives you the current_user helper by default. However, it doesn't give you current_user? boolean method. You need to define this method yourself in application_helper.rb:
def current_user?(user)
user == current_user
end
Now you have current_helper? defined you can pass in your #user instance variable
<% unless current_user?(#user) %>
<div id="follow_form">
<% if current_user.following?(#user) %>
<%= render 'unfollow' %>
<% else %>
<%= render 'follow' %>
<% end %>
</div>
<% end %>
Thats all you have to do. You don't have to touch your ApplicationController or SessionsHelper in any way. You are simply using current_user which Devise gives you in order to define current_user?(user). This way is much easier to implement. Hope this helps

Answer 2

Update
Hopefully you should have the following setup:
Your ApplicationController
class ApplicationController < ActionController::Base
protect_from_forgery
include SessionsHelper
# Force signout to prevent CSRF attacks
def handle_unverified_request
sign_out
super
end
private
def current_user
#current_user ||= User.find(session[:user_id]) if session[:user_id]
end
helper_method :current_user
def authorize
redirect_to login_url, alert: "Not Autherized" if current_user.nil?
end
def track_activity(trackable, action = params[:action])
current_user.activities.create! action: action, trackable: trackable
end
end
You should also have a sessions_helper
module SessionsHelper
def sign_in(user)
cookies.permanent[:remember_token] = user.remember_token
self.current_user = user
end
def signed_in?
!current_user.nil?
end
def current_user=(user)
#current_user = user
end
def current_user
#current_user ||= User.find_by_remember_token(cookies[:remember_token])
end
def current_user?(user)
user == current_user
end
#CHECK THE ABOVE LINE!
def sign_out
self.current_user = nil
cookies.delete(:remember_token)
end
end
Then you can do in your view the following:
<% unless current_user?(#user) %>
<div id="follow_form">
<% if current_user.following?(#user) %>
<%= render 'unfollow' %>
<% else %>
<%= render 'follow' %>
<% end %>
</div>
<% end %>