Agile Web Development with Rails, Edition 5

15.2 Iteration J2: Authenticating Users 14.4 Playtime

15.1 Iteration J1: Adding Users

51 (tests|runs), 147 assertions, 0 failures, 0 errors.
<0> was expected to be
>=
<1>.

Traceback:
  /home/rubys/git/awdwr/edition4/checkdepot.rb:38:in `assert_test_summary'
  /home/rubys/git/awdwr/edition4/checkdepot.rb:389:in `block in <class:DepotTest>'

Scaffold the user model

rails generate scaffold User name:string password:digest
      invoke  active_record
      create    db/migrate/20170614120704_create_users.rb
      create    app/models/user.rb
      invoke    test_unit
      create      test/models/user_test.rb
      create      test/fixtures/users.yml
      invoke  resource_route
       route    resources :users
      invoke  scaffold_controller
      create    app/controllers/users_controller.rb
      invoke    erb
      create      app/views/users
      create      app/views/users/index.html.erb
      create      app/views/users/edit.html.erb
      create      app/views/users/show.html.erb
      create      app/views/users/new.html.erb
      create      app/views/users/_form.html.erb
      invoke    test_unit
      create      test/controllers/users_controller_test.rb
      invoke    helper
      create      app/helpers/users_helper.rb
      invoke      test_unit
      invoke    jbuilder
      create      app/views/users/index.json.jbuilder
      create      app/views/users/show.json.jbuilder
      create      app/views/users/_user.json.jbuilder
      invoke  test_unit
      create    test/system/users_test.rb
      invoke  assets
      invoke    coffee
      create      app/assets/javascripts/users.coffee
      invoke    scss
      create      app/assets/stylesheets/users.scss
      invoke  scss
   identical    app/assets/stylesheets/scaffolds.scss

uncomment out bcrypt

edit Gemfile
# Use ActiveModel has_secure_password
gem 'bcrypt', '~> 3.1.7'

Restart the server.

Run the migration

rails db:migrate
mv 20170614120704_create_users.rb 20170614000009_create_users.rb
== 20170614000009 CreateUsers: migrating ======================================
-- create_table(:users)
   -> 0.0006s
== 20170614000009 CreateUsers: migrated (0.0007s) =============================
 

Add validation, has_secure_password

edit app/models/user.rb
class User < ApplicationRecord
  validates :name, presence: true, uniqueness: true
  has_secure_password
end

Avoid redirect after create, update operations

edit app/controllers/users_controller.rb
  def create
    @user = User.new(user_params)
 
    respond_to do |format|
      if @user.save
        format.html { redirect_to users_url,
          notice: "User #{@user.name} was successfully created." }
        format.json { render :show, status: :created, location: @user }
      else
        format.html { render :new }
        format.json { render json: @user.errors,
          status: :unprocessable_entity }
      end
    end
  end
edit app/controllers/users_controller.rb
  def update
    respond_to do |format|
      if @user.update(user_params)
        format.html { redirect_to users_url,
          notice: "User #{@user.name} was successfully updated." }
        format.json { render :show, status: :ok, location: @user }
      else
        format.html { render :edit }
        format.json { render json: @user.errors,
          status: :unprocessable_entity }
      end
    end
  end

Display users sorted by name

edit app/controllers/users_controller.rb
  def index
    @users = User.order(:name)
  end

Update form used to both create and update users

edit app/views/users/_form.html.erb
<div class="depot_form">
 
<%= form_with(model: user, local: true) do |form| %>
  <% if user.errors.any? %>
    <div id="error_explanation">
      <h2><%= pluralize(user.errors.count, "error") %>
        prohibited this user from being saved:</h2>
 
      <ul>
      <% user.errors.full_messages.each do |message| %>
        <li><%= message %></li>
      <% end %>
      </ul>
    </div>
  <% end %>
 
  <fieldset>
  <legend>Enter User Details</legend>
 
  <div class="field">
    <%= form.label :name, 'Name:' %>
    <%= form.text_field :name, id: :user_name, size: 40 %>
  </div>
 
  <div class="field">
    <%= form.label :password, 'Password:' %>
    <%= form.password_field :password, id: :user_password, size: 40 %>
  </div>
 
  <div class="field">
    <%= form.label :password_confirmation, 'Confirm:' %>
    <%= form.password_field :password_confirmation, id: :user_password_confirmation, size: 40 %>
  </div>
 
  <div class="actions">
    <%= form.submit %>
  </div>
 
  </fieldset>
<% end %>
 
</div>

Demonstrate creating a new user

get /users

Users

Name

New User
get /users/new

New User

Enter User Details
Back
post /users
You are being redirected.
get http://localhost:3000/users

User dave was successfully created.

Users

Name
dave Show Edit Destroy

New User

Show how this is stored in the database

sqlite3> select * from users
             id = 1
           name = dave
password_digest = $2a$10$u.PdElftrOMdOC9.ZgEVjOn.Q8qfAOs33t29ue1mWOhsvPOyGBVXe
     created_at = 2017-06-14 12:07:22.857714
     updated_at = 2017-06-14 12:07:22.857714

Update tests to reflect the changes in redirection and uniqueness

edit test/controllers/users_controller_test.rb
  test "should create user" do
    assert_difference('User.count') do
      post users_url, params: { user: { name: 'sam',
      password: 'secret', password_confirmation: 'secret' } }
    end
 
    assert_redirected_to users_url
  end
edit test/controllers/users_controller_test.rb
  test "should create user" do
    assert_difference('User.count') do
      post users_url, params: { user: { name: 'sam',
      password: 'secret', password_confirmation: 'secret' } }
    end
 
    assert_redirected_to users_url
  end

Make sure that all test names are unique

edit test/fixtures/users.yml
# Read about fixtures at
# http://api.rubyonrails.org/classes/ActiveRecord/FixtureSet.html
 
one:
  name: dave
  password_digest: <%= BCrypt::Password.create('secret') %>
 
two:
  name: susannah
  password_digest: <%= BCrypt::Password.create('secret') %>
rails test
Run options: --seed 35528
 
# Running:
 
..................................................E
 
Error:
DslUserStoriesTest#test_two_people_buying:
NoMethodError: undefined method `split' for nil:NilClass
    app/models/order.rb:36:in `charge!'
    app/jobs/charge_order_job.rb:7:in `perform'
    app/controllers/orders_controller.rb:42:in `block in create'
    app/controllers/orders_controller.rb:36:in `create'
    test/integration/dsl_user_stories_test.rb:95:in `checks_out'
    test/integration/dsl_user_stories_test.rb:63:in `block in test_two_people_buying'
    test/integration/dsl_user_stories_test.rb:54:in `test_two_people_buying'
 
bin/rails test test/integration/dsl_user_stories_test.rb:53
 
 
 
Finished in 1.980746s, 25.7479 runs/s, 69.1659 assertions/s.
 
51 runs, 137 assertions, 0 failures, 1 errors, 0 skips

15.2 Iteration J2: Authenticating Users 14.4 Playtime