Friendship create action

I am trying to create a friendship system. There is a post at

Which seem great but the create action doesn't work. How can it work here what I have

Controller   #Send a friendship request   def create     Friendships.request(@customer, @friend)   end

Model   # Record a pending friend request.   def self.request(customer, friend)     unless customer == friend or Friendship.exists?(customer, friend)       transaction do   create(:customer => customer, :friend => friend, :status => 'pending')   create(:customer => friend, :friend => customer, :status => 'requested')       end     end   end

Here how I call it in my view and i think this is where the issue is       <%= link_to "Request friendship with #{customer.first_name}",     { :controller => "friendships", :action => "create",   :id => customer.id },   :confirm =>   "Send friend request to #{customer.incomplete_name}?" %>       <% end %>

Now the tutorial is old an i am wondering if the way i am calling it his the proper way. Thanks in advance