14.1 Iteration I1: Adding Users

Scaffold the user model

rails generate scaffold User name:string password:digest

      invoke  active_record

      create    db/migrate/20160306174156_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

      create        test/helpers/users_helper_test.rb

      invoke    jbuilder

      create      app/views/users/index.json.jbuilder

      create      app/views/users/show.json.jbuilder

      invoke  assets

      invoke    coffee

      create      app/assets/javascripts/users.js.coffee

      invoke    scss

      create      app/assets/stylesheets/users.css.scss

      invoke  scss

   identical    app/assets/stylesheets/scaffolds.css.scss

uncomment out bcrypt

edit Gemfile

# Use ActiveModel has_secure_password

gem 'bcrypt', '~> 3.1.7'

Run the migration

rake db:migrate

mv 20160306174156_create_users.rb 20160306000009_create_users.rb

== 20160306000009 CreateUsers: migrating ======================================

-- create_table(:users)

   -> 0.0022s

== 20160306000009 CreateUsers: migrated (0.0022s) =============================

Add validation, has_secure_password

edit app/models/user.rb

class User < ActiveRecord::Base

  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

Add Notice

edit app/views/users/index.html.erb

<h1>Listing users</h1>

<p id="notice"><%= notice %></p>

<table>

  <thead>

    <tr>

      <th>Name</th>

      <th colspan="3"></th>

    </tr>

  </thead>

  <tbody>

    <% @users.each do |user| %>

      <tr>

        <td><%= user.name %></td>

        <td><%= link_to 'Show', user %></td>

        <td><%= link_to 'Edit', edit_user_path(user) %></td>

        <td><%= link_to 'Destroy', user, method: :delete,

        data: { confirm: 'Are you sure?' } %></td>

      </tr>

    <% end %>

  </tbody>

</table>

<br>

<%= link_to 'New User', new_user_path %>

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 |msg| %>

        <li><%= msg %></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$4MJhksoDIw/VcmqfWmSjvuzY4S7IjgRDLNpXSzTTGbEh0uIrS8HdW

     created_at = 2016-03-06 17:41:59.697750

     updated_at = 2016-03-06 17:41:59.697750

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 :create, user: { name: 'sam', password: 'secret',

        password_confirmation: 'secret' }

end

    assert_redirected_to users_path

end

edit test/controllers/users_controller_test.rb

  test "should create user" do

    assert_difference('User.count') do

      post :create, user: { name: 'sam', password: 'secret',

        password_confirmation: 'secret' }

end

    assert_redirected_to users_path

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') %>

rake test

Run options: --seed 23378

# Running:

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

Finished in 1.089698s, 47.7196 runs/s, 152.3358 assertions/s.

52 runs, 166 assertions, 0 failures, 0 errors, 0 skips