What happens when you scaffold in Rails 5.02

 rails g scaffold Todo title:string notes:text

C:\PRJ4RAILS\boots4rails>rails g scaffold Todo title:string notes:text
      invoke  active_record
      create    db/migrate/20170326123016_create_todos.rb
      create    app/models/todo.rb
      invoke    test_unit
      create      test/models/todo_test.rb
      create      test/fixtures/todos.yml
      invoke  resource_route
       route    resources :todos
      invoke  scaffold_controller
      create    app/controllers/todos_controller.rb
      invoke    erb
      create      app/views/todos
      create      app/views/todos/index.html.erb
      create      app/views/todos/edit.html.erb
      create      app/views/todos/show.html.erb
      create      app/views/todos/new.html.erb
      create      app/views/todos/_form.html.erb
      invoke    test_unit
      create      test/controllers/todos_controller_test.rb
      invoke    helper
      create      app/helpers/todos_helper.rb
      invoke      test_unit
      invoke    jbuilder
      create      app/views/todos/index.json.jbuilder
      create      app/views/todos/show.json.jbuilder
      create      app/views/todos/_todo.json.jbuilder
      invoke  assets
      invoke    coffee
      create      app/assets/javascripts/todos.coffee
      invoke    scss
      create      app/assets/stylesheets/todos.scss
      invoke  scss
      create    app/assets/stylesheets/scaffolds.scss

What happpens when you rails new in Rails 5.02

1. rails new boots4rails -d mysql

C:\PRJ4RAILS>rails new boots4rails -d mysql
      create
      create  README.md
      create  Rakefile
      create  config.ru
      create  .gitignore
      create  Gemfile
      create  app
      create  app/assets/config/manifest.js
      create  app/assets/javascripts/application.js
      create  app/assets/javascripts/cable.js
      create  app/assets/stylesheets/application.css
      create  app/channels/application_cable/channel.rb
      create  app/channels/application_cable/connection.rb
      create  app/controllers/application_controller.rb
      create  app/helpers/application_helper.rb
      create  app/jobs/application_job.rb
      create  app/mailers/application_mailer.rb
      create  app/models/application_record.rb
      create  app/views/layouts/application.html.erb
      create  app/views/layouts/mailer.html.erb
      create  app/views/layouts/mailer.text.erb
      create  app/assets/images/.keep
      create  app/assets/javascripts/channels
      create  app/assets/javascripts/channels/.keep
      create  app/controllers/concerns/.keep
      create  app/models/concerns/.keep
      create  bin
      create  bin/bundle
      create  bin/rails
      create  bin/rake
      create  bin/setup
      create  bin/update
      create  config
      create  config/routes.rb
      create  config/application.rb
      create  config/environment.rb
      create  config/secrets.yml
      create  config/cable.yml
      create  config/puma.rb
      create  config/environments
      create  config/environments/development.rb
      create  config/environments/production.rb
      create  config/environments/test.rb
      create  config/initializers
      create  config/initializers/application_controller_renderer.rb
      create  config/initializers/assets.rb
      create  config/initializers/backtrace_silencers.rb
      create  config/initializers/cookies_serializer.rb
      create  config/initializers/cors.rb
      create  config/initializers/filter_parameter_logging.rb
      create  config/initializers/inflections.rb
      create  config/initializers/mime_types.rb
      create  config/initializers/new_framework_defaults.rb
      create  config/initializers/session_store.rb
      create  config/initializers/wrap_parameters.rb
      create  config/locales
      create  config/locales/en.yml
      create  config/boot.rb
      create  config/database.yml
      create  db
      create  db/seeds.rb
      create  lib
      create  lib/tasks
      create  lib/tasks/.keep
      create  lib/assets
      create  lib/assets/.keep
      create  log
      create  log/.keep
      create  public
      create  public/404.html
      create  public/422.html
      create  public/500.html
      create  public/apple-touch-icon-precomposed.png
      create  public/apple-touch-icon.png
      create  public/favicon.ico
      create  public/robots.txt
      create  test/fixtures
      create  test/fixtures/.keep
      create  test/fixtures/files
      create  test/fixtures/files/.keep
      create  test/controllers
      create  test/controllers/.keep
      create  test/mailers
      create  test/mailers/.keep
      create  test/models
      create  test/models/.keep
      create  test/helpers
      create  test/helpers/.keep
      create  test/integration
      create  test/integration/.keep
      create  test/test_helper.rb
      create  tmp
      create  tmp/.keep
      create  tmp/cache
      create  tmp/cache/assets
      create  vendor/assets/javascripts
      create  vendor/assets/javascripts/.keep
      create  vendor/assets/stylesheets
      create  vendor/assets/stylesheets/.keep
      remove  config/initializers/cors.rb
         run  bundle install
Fetching gem metadata from https://rubygems.org/..........
Fetching version metadata from https://rubygems.org/..
Fetching dependency metadata from https://rubygems.org/.
Resolving dependencies...
Using rake 12.0.0
Using concurrent-ruby 1.0.5
Using i18n 0.8.1
Using minitest 5.10.1
Using thread_safe 0.3.6
Using builder 3.2.3
Using erubis 2.7.0
Using mini_portile2 2.1.0
Using rack 2.0.1
Using nio4r 2.0.0
Using websocket-extensions 0.1.2
Using mime-types-data 3.2016.0521
Using arel 7.1.4
Using bundler 1.13.6
Using coffee-script-source 1.12.2
Using execjs 2.7.0
Using method_source 0.8.2
Using thor 0.19.4
Using debug_inspector 0.0.2
Using multi_json 1.12.1
Using mysql2 0.4.5
Using puma 3.8.2
Using sass 3.4.23
Using tilt 2.0.7
Using turbolinks-source 5.0.0
Installing tzinfo 1.2.3
Using nokogiri 1.7.1
Using rack-test 0.6.3
Using sprockets 3.7.1
Using websocket-driver 0.6.5
Using mime-types 3.1
Using coffee-script 2.4.1
Installing uglifier 3.1.10
Using turbolinks 5.0.1
Using activesupport 5.0.2
Installing tzinfo-data 1.2017.2
Using loofah 2.0.3
Using mail 2.6.4
Using rails-dom-testing 2.0.2
Using globalid 0.3.7
Using activemodel 5.0.2
Using jbuilder 2.6.3
Using rails-html-sanitizer 1.0.3
Using activejob 5.0.2
Using activerecord 5.0.2
Using actionview 5.0.2
Using actionpack 5.0.2
Using actioncable 5.0.2
Using actionmailer 5.0.2
Using railties 5.0.2
Using sprockets-rails 3.2.0
Using coffee-rails 4.2.1
Using jquery-rails 4.3.1
Using web-console 3.4.0
Using rails 5.0.2
Using sass-rails 5.0.6
Bundle complete! 12 Gemfile dependencies, 56 gems now installed.
Use `bundle show [gemname]` to see where a bundled gem is installed.

Let's Code - How to setup Bootstrap 4 on Ruby on Rails 5

Let's Code a quick and easy responsive website using Bootstrap 4 on Ruby on Rails 5! In this episode we setup Bootstrap 4 on a Rails application for some of that responsive and mobile first goodness.

For this Rails 5 app we use the following built-in Rails features:

- Generators (controller)
- Rubygems (Bootstrap 4, Tether)
- Asset Pipeline
- Layouts and views

Using Notepad++ for writing Ruby Programs

Let us first configure Notepad++ for editing Ruby programs.

From the Notepad++ menu, click on Settings => Preferences. Click on Language Menu/Tab settings. Under the tab settings for [Default] modify the tab size and Replace by space options as shown below. We set the tab size to 2 and we set Replace by space option to use spaces instead of tab character.

Now we will add a custom menu in the Run menu for running Ruby programs. This way you can run Ruby programs directly from the Notepad++ editor. From the Notepad++ menu, click on Run => Run. This opens up the following window.

In the text field, enter the following command. In order for this to work, you need to have Ruby 1.9.x installed and the Ruby bin folder must be on the PATH environment variable. See this tutorial for step by step instructions on installing Ruby in Windows.

cmd /K ruby "$(FULL_CURRENT_PATH)"

Click on the Save… button to save this as a custom command.

Enter a name for the shortcut (Run Ruby Program) and then select a keyboard shortcut for running the command (F6). Click on OK.

Now from the Notepad++ menu, Click on Run. You will see the additional "Run Ruby Program" menu as shown below.

In order for this shortcut to work, you need to ensure that your Ruby program is saved in a file. To test Notepad++, type in the following program,

1	def fact(n)

2

if n==1

3

1

4

else

5	n * fact(n-1)

6

end

7

end

8	puts fact(5)

Save the file as factorial.rb. Now press F6 key or select the "Run Ruby Program" submenu from the Run menu. You should see the output of the Ruby program in a command window as shown below,

More at http://www.rubytips.org/2011/12/22/using-notepad-for-writing-ruby-programs-in-windows/

Rails 5 - has_secure_password

has_secure_password(options = {})Link

Adds methods to set and authenticate against a BCrypt password. This mechanism requires you to have a password_digest attribute.

The following validations are added automatically:

• Password must be present on creation
• Password length should be less than or equal to 72 characters
• Confirmation of password (using a password_confirmation attribute)

If password confirmation validation is not needed, simply leave out the value for password_confirmation (i.e. don't provide a form field for it). When this attribute has a nilvalue, the  validation will not be triggered.

For further customizability, it is possible to suppress the default validations by passing validations: false as an argument.

Add bcrypt (~> 3.1.7) to Gemfile to use has_secure_password:

gem 'bcrypt', '~> 3.1.7'

Example using Active Record (which automatically includes ActiveModel::SecurePassword):

# Schema: User(name:string, password_digest:string)
class User < ActiveRecord::Base
  has_secure_password
end

user = User.new(name: 'david', password: '', password_confirmation: 'nomatch')
user.save                                                       # => false, password required
user.password = 'mUc3m00RsqyRe'
user.save                                                       # => false, confirmation doesn't match
user.password_confirmation = 'mUc3m00RsqyRe'
user.save                                                       # => true
user.authenticate('notright')                                   # => false
user.authenticate('mUc3m00RsqyRe')                              # => user
User.find_by(name: 'david').try(:authenticate, 'notright')      # => false
User.find_by(name: 'david').try(:authenticate, 'mUc3m00RsqyRe') # => user

More at http://api.rubyonrails.org/classes/ActiveModel/SecurePassword/ClassMethods.html

https://rubyplus.com/episodes/311-Authentication-from-Scratch-in-Rails-5

https://rubyplus.com/articles/4171-Authentication-from-Scratch-in-Rails-5