How and where to add a Devise view helper method current_user boolean?

Question

This is the method I would like to access in my views:

def current_user?(user)
  user == current_user
end

I essentially need to check that the current user can not friend and unfriend themselves in the view.

<% unless current_user?(@user) %>
  <% if current_user.friendly?(@user)
    <%= render 'unfriend' %>
  <% else %>
    <%= render 'friend' %>
  <% end %>
<% end %>

The current_user helper method is already provided by Devise. How and where do I add this method in my Rails project?

Thanks for your help

Answer 1

To use application helper method in devise views. Place your class_eval code at the bottom of Devise initializer, Just after the Devise.setup block.

config/initializers/devise.rb

Devise.setup do |config|
  # ... existing Devise configuration, no modification necessary to include helper(s) ...
end

EDIT:

Devise::Mailer.class_eval do
  helper :application # include "ApplicationHelper", adjust to suit your needs
end

Answer 2

In my opinion you could simple add the comparison on the view like this:

<% if current_user != @user %>
  <% if current_user.friendly?(@user)
    <%= render 'unfriend' %>
  <% else %>
    <%= render 'friend' %>
  <% end %>
<% end %>

Anyway if you still want to use the method you could create a method in User.rb

def equal_user?(another_user)
  another_user == self
end

and in the view

<% if @user.equal_user?(current_user) %>

Answer 3

I made a mistake initially in the application_helper.rb file.

I used an instance variable current_user?(@user) instead of the local variable current_user?(user) .

If I was not using Devise I would have put the helper method in the sessions helper. So i figured it would work in the appication helper but was not positive.

Thanks @JesseWolgamott