Agile Web Development with Rails, Edition 4

14.3 Iteration I3: Limiting Access 14.1 Iteration I1: Adding Users

14.2 Iteration I2: Authenticating Users

57 (tests|runs), 172 assertions, 0 failures, 0 errors.
<0> expected to be
>=
<1>.

Traceback:
  /home/rubys/git/awdwr/edition4/checkdepot.rb:36:in `assert_test_summary'
  /home/rubys/git/awdwr/edition4/checkdepot.rb:327:in `block in <class:DepotTest>'

Generate empty controllers for sessions and administration

rails generate controller Sessions new create destroy
      create  app/controllers/sessions_controller.rb
       route  get 'sessions/destroy'
       route  get 'sessions/create'
       route  get 'sessions/new'
      invoke  erb
      create    app/views/sessions
      create    app/views/sessions/new.html.erb
      create    app/views/sessions/create.html.erb
      create    app/views/sessions/destroy.html.erb
      invoke  test_unit
      create    test/controllers/sessions_controller_test.rb
      invoke  helper
      create    app/helpers/sessions_helper.rb
      invoke    test_unit
      invoke  assets
      invoke    coffee
      create      app/assets/javascripts/sessions.coffee
      invoke    scss
      create      app/assets/stylesheets/sessions.scss
rails generate controller Admin index
      create  app/controllers/admin_controller.rb
       route  get 'admin/index'
      invoke  erb
      create    app/views/admin
      create    app/views/admin/index.html.erb
      invoke  test_unit
      create    test/controllers/admin_controller_test.rb
      invoke  helper
      create    app/helpers/admin_helper.rb
      invoke    test_unit
      invoke  assets
      invoke    coffee
      create      app/assets/javascripts/admin.coffee
      invoke    scss
      create      app/assets/stylesheets/admin.scss

Implement login in and out by storing the user_id in the session

edit app/controllers/sessions_controller.rb
class SessionsController < ApplicationController
  def new
  end
 
  def create
    user = User.find_by(name: params[:name])
    if user and user.authenticate(params[:password])
      session[:user_id] = user.id
      redirect_to admin_url
    else
      redirect_to login_url, alert: "Invalid user/password combination"
    end
  end
 
  def destroy
    session[:user_id] = nil
    redirect_to store_url, notice: "Logged out"
  end
end

Create the view using form_for as there is no underlying model

edit app/views/sessions/new.html.erb
<div class="depot_form">
  <% if flash[:alert] %>
    <p id="notice"><%= flash[:alert] %></p>
  <% end %>
 
  <%= form_tag do %>
    <fieldset>
      <legend>Please Log In</legend>
 
      <div>
        <%= label_tag :name, 'Name:' %>
        <%= text_field_tag :name, params[:name] %>
      </div>
 
      <div>
        <%= label_tag :password, 'Password:' %>
        <%= password_field_tag :password, params[:password] %>
      </div>
  
      <div>
        <%= submit_tag "Login" %>
      </div>
    </fieldset>
  <% end %>
</div>

Create a landing page for the administrator

edit app/views/admin/index.html.erb
<h1>Welcome</h1>
 
It's <%= Time.now %>
We have <%= pluralize(@total_orders, "order") %>.

Make the orders count available to the admin page

edit app/controllers/admin_controller.rb
class AdminController < ApplicationController
  def index
    @total_orders = Order.count
  end
end

Connect the routes to the controller actions

edit config/routes.rb
Rails.application.routes.draw do
  get 'admin' => 'admin#index'
 
  controller :sessions do
    get  'login' => :new
    post 'login' => :create
    delete 'logout' => :destroy
  end
 
  resources :users
  resources :orders
  resources :line_items
  resources :carts
  get 'store/index'
 
  resources :products do
    get :download, :on => :member
    get :who_bought, on: :member
  end
 
  # The priority is based upon order of creation:
  # first created -> highest priority.
  # See how all your routes lay out with "rake routes".
 
  # You can have the root of your site routed with "root"
  root 'store#index', as: 'store'
  # ...
end

Do a login

get /login
Please Log In 
post /login
You are being redirected. 
get http://localhost:3000/admin

Welcome

It's 2016-01-21 03:42:25 -0500 We have 2 orders.

Fix the sessions controller test

edit test/controllers/sessions_controller_test.rb
require 'test_helper'
 
class SessionsControllerTest < ActionController::TestCase
  test "should get new" do
    get :new
    assert_response :success
  end
 
  test "should login" do
    dave = users(:one)
    post :create, name: dave.name, password: 'secret'
    assert_redirected_to admin_url
    assert_equal dave.id, session[:user_id]
  end
 
  test "should fail login" do
    dave = users(:one)
    post :create, name: dave.name, password: 'wrong'
    assert_redirected_to login_url
  end
 
  test "should logout" do
    delete :destroy
    assert_redirected_to store_url
  end
 
end
rake test
Run options: --seed 37884
 
# Running:
 
..........................................FF..........F..
 
Finished in 1.391107s, 40.9746 runs/s, 120.0483 assertions/s.
 
  1) Failure:
OrderNotifierTest#test_received [/home/rubys/git/awdwr/edition4/work-42/depot/test/mailers/order_notifier_test.rb:9]:
Expected: ["depot@example.com"]
  Actual: ["from@example.com"]
 
 
  2) Failure:
OrderNotifierTest#test_shipped [/home/rubys/git/awdwr/edition4/work-42/depot/test/mailers/order_notifier_test.rb:19]:
Expected: ["depot@example.com"]
  Actual: ["from@example.com"]
 
 
  3) Failure:
UserStoriesTest#test_buying_a_product [/home/rubys/git/awdwr/edition4/work-42/depot/test/integration/user_stories_test.rb:69]:
Expected: "Sam Ruby <depot@example.com>"
  Actual: "from@example.com"
 
57 runs, 167 assertions, 3 failures, 0 errors, 0 skips

14.3 Iteration I3: Limiting Access 14.1 Iteration I1: Adding Users