Scope to not list self in users list

app/controllers/users_controller.rb

@@ -1,6 +1,6 @@
 class UsersController < ApplicationController
   def index
-    @users = User.all
+    @users = User.all_except(current_user)
   end
 
   def show

app/models/user.rb

@@ -2,6 +2,8 @@ class User < ActiveRecord::Base
   has_many :friendships
   has_many :friends, through: :friendships
 
+  scope :all_except, ->(user) { where.not(id: user) }
+
   def self.from_omniauth(auth)
     where(provider: auth[:provider], uid: auth[:uid]).first_or_create do |user|
       user.provider = auth[:provider]