14.1 Iteration I1: Adding Users

Scaffold the user model

rails generate scaffold User name:string password:digest

      invoke  active_record

      create    db/migrate/20170320044352_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'

Run the migration

rails db:migrate

mv 20170320044352_create_users.rb 20170320000009_create_users.rb

== 20170320000009 CreateUsers: migrating ======================================

-- create_table(:users)

   -> 0.0006s

== 20170320000009 CreateUsers: migrated (0.0006s) =============================

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_for(user) do |f| %>

  <% 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">

    <%= f.label :name, 'Name:' %>

    <%= f.text_field :name, size: 40 %>

  </div>

  <div class="field">

    <%= f.label :password, 'Password:' %>

    <%= f.password_field :password, size: 40 %>

  </div>

  <div class="field">

    <%= f.label :password_confirmation, 'Confirm:' %>

    <%= f.password_field :password_confirmation, size: 40 %>

  </div>

  <div class="actions">

    <%= f.submit %>

  </div>

  </fieldset>

<% end %>

</div>

Demonstrate creating a new user

get /users

Your Downloads

Name

New User

get /users/new

Back

post /users

You are being redirected.

get http://localhost:3000/users

User dave was successfully created.

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$10$weS.WnIT3PCqhEBxm/U35OBUsgqbb6U.A0A1a2KVjRfv7OLMpRTGu

     created_at = 2017-03-20 04:44:04.877469

     updated_at = 2017-03-20 04:44:04.877469

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

/home/rubys/.rvm/gems/ruby-2.4.0/gems/sass-3.4.23/lib/sass/util.rb:1109: warning: constant ::Fixnum is deprecated

/home/rubys/.rvm/gems/ruby-2.4.0/gems/sass-3.4.23/lib/sass/util.rb:1109: warning: constant ::Fixnum is deprecated

Run options: --seed 13032

# Running:

...................................................

Finished in 1.812888s, 28.1319 runs/s, 81.0861 assertions/s.

51 runs, 147 assertions, 0 failures, 0 errors, 0 skips