logout

app/controllers/sessions_controller.rb

@@ -5,11 +5,16 @@ class SessionsController < ApplicationController
   def create
     @user = User.find_by(username: params[:username])
     if @user && @user.authenticate(params[:password])
-      sessions[:user_id] = @user.id
+      session[:user_id] = @user.id
     end
     redirect_to '/welcome'
   end
 
+  def delete
+    session.delete(:user_id)
+    redirect_to '/welcome'
+  end
+
   def welcome
   end
 end

app/views/sessions/welcome.html.erb

@@ -1,6 +1,8 @@
 <h1>Welcome</h1>
 <% if logged_in? %>
   <h1>You are Logged In, <%= current_user.username %></h1>
-<%end%>
+  <%= button_to "Logout", '/logout', method: :get%>
+<%else%>
   <%= button_to "Login", '/login', method: :get%>
   <%= button_to "Sign Up", '/users/new', method: :get%>
+<%end%>

config/routes.rb

@@ -1,6 +1,7 @@
 Rails.application.routes.draw do
   resources :users, only: [:new, :create]
   get 'login', to: 'sessions#new'
+  get 'logout', to: 'sessions#delete'
   post 'login', to: 'sessions#create'
   get 'welcome', to: 'sessions#welcome'
   resources :books

spec/controllers/sessions_controller_spec.rb

@@ -14,6 +14,13 @@ RSpec.describe SessionsController do
       expect(subject).to redirect_to('/welcome')
     end
   end
+  describe 'get delete' do
+    # TODO test session status
+    subject { get 'delete' }
+    it 'redirects to /welcome' do
+      expect(subject).to redirect_to('/welcome')
+    end
+  end
   describe 'get welcome' do
     subject { get 'welcome' }
     it 'renders the sessions/welcome template' do