Agile Web Development with Rails, Edition 4

24.3 Active Resources

bundle exec /home/rubys/git/rails/railties/bin/rails new depot_client --skip-bundle --dev

      create

      create  README

      create  Rakefile

      create  config.ru

      create  .gitignore

      create  Gemfile

      create  app

      create  app/assets/images/rails.png

      create  app/assets/javascripts/application.js

      create  app/assets/stylesheets/application.css

      create  app/controllers/application_controller.rb

      create  app/helpers/application_helper.rb

      create  app/mailers

      create  app/models

      create  app/views/layouts/application.html.erb

      create  app/mailers/.gitkeep

      create  app/models/.gitkeep

      create  config

      create  config/routes.rb

      create  config/application.rb

      create  config/environment.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/backtrace_silencers.rb

      create  config/initializers/inflections.rb

      create  config/initializers/mime_types.rb

      create  config/initializers/secret_token.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  doc

      create  doc/README_FOR_APP

      create  lib

      create  lib/tasks

      create  lib/tasks/.gitkeep

      create  lib/assets

      create  lib/assets/.gitkeep

      create  log

      create  log/.gitkeep

      create  public

      create  public/404.html

      create  public/422.html

      create  public/500.html

      create  public/favicon.ico

      create  public/index.html

      create  public/robots.txt

      create  script

      create  script/rails

      create  test/fixtures

      create  test/fixtures/.gitkeep

      create  test/functional

      create  test/functional/.gitkeep

      create  test/integration

      create  test/integration/.gitkeep

      create  test/unit

      create  test/unit/.gitkeep

      create  test/performance/browsing_test.rb

      create  test/test_helper.rb

      create  tmp/cache

      create  tmp/cache/assets

      create  vendor/assets/javascripts

      create  vendor/assets/javascripts/.gitkeep

      create  vendor/assets/stylesheets

      create  vendor/assets/stylesheets/.gitkeep

      create  vendor/plugins

      create  vendor/plugins/.gitkeep

bundle install

Using rake (0.9.2.2)

Using i18n (0.6.0)

Using multi_json (1.0.3)

Using activesupport (3.2.0.beta)

Using builder (3.0.0)

Using activemodel (3.2.0.beta)

Using erubis (2.7.0)

Using journey (1.0.0.20111022124133)

Using rack (1.3.5)

Using rack-cache (1.1)

Using rack-test (0.6.1)

Using hike (1.2.1)

Using tilt (1.3.3)

Using sprockets (2.0.3)

Using actionpack (3.2.0.beta)

Using mime-types (1.17.2)

Using polyglot (0.3.2)

Using treetop (1.4.10)

Using mail (2.3.0)

Using actionmailer (3.2.0.beta)

Using arel (2.2.1)

Using tzinfo (0.3.30)

Using activerecord (3.2.0.beta)

Using activeresource (3.2.0.beta)

Using bundler (1.0.21)

Using coffee-script-source (1.1.2)

Using execjs (1.2.9)

Using coffee-script (2.2.0)

Using rack-ssl (1.3.2)

Using json (1.6.1)

Using rdoc (3.11)

Using thor (0.14.6)

Using railties (3.2.0.beta)

Using coffee-rails (3.2.0.beta)

Using jquery-rails (1.0.16)

Using rails (3.2.0.beta)

Using sass (3.1.10)

Using sass-rails (3.1.1.alpha.0)

Using sqlite3 (1.3.4)

Using uglifier (1.0.4)

Your bundle is complete! Use `bundle show [gemname]` to see where a bundled gem is installed.

edit app/models/product.rb

class Product < ActiveResource::Base

  self.site = 'http://dave:secret@localhost:3000/'

end

echo "Product.find(2).title" | IRBRC=tmp/irbrc rails console

Loading development environment (Rails 3.2.0.beta)

Switch to inspect mode.

>> Product.find(2).title

=> "CoffeeScript"

>>

edit app/controllers/line_items_controller.rb

  def create

    @cart = current_cart

    if params[:line_item]

      # ActiveResource

      params[:line_item][:order_id] = params[:order_id]

      @line_item = LineItem.new(params[:line_item])

    else

      # HTML forms

      product = Product.find(params[:product_id])

      @line_item = @cart.add_product(product.id)

end

    respond_to do |format|

      if @line_item.save

        format.html { redirect_to store_url }

        format.js   { @current_item = @line_item }

        format.json { render json: @line_item,

          status: :created, location: @line_item }

      else

        format.html { render action: "new" }

        format.json { render json: @line_item.errors,

          status: :unprocessable_entity }

end

end

end

edit config/routes.rb

Depot::Application.routes.draw do

  get 'admin' => 'admin#index'

  controller :sessions do

    get  'login' => :new

    post 'login' => :create

    delete 'logout' => :destroy

end

  scope '(:locale)' do

    resources :users

    resources :orders do

      resources :line_items

end

    resources :line_items

    resources :carts

    resources :products do

      get :who_bought, on: :member

end

    root to: 'store#index', as: 'store'

end

end

echo "Product.find(2).title" | IRBRC=tmp/irbrc rails console

Loading development environment (Rails 3.2.0.beta)

Switch to inspect mode.

>> Product.find(2).title

=> "CoffeeScript"

>>

echo "p = Product.find(2)\\nputs p.price\\np.price = BigDecimal.new(p.price)-5\\np.save" | IRBRC=tmp/irbrc rails console

Loading development environment (Rails 3.2.0.beta)

Switch to inspect mode.

>> p = Product.find(2)

=> #<Product:0x00000003a8b260 @attributes={"created_at"=>"2011-10-29T07:11:56Z", "description"=>"<p>\n        CoffeeScript is JavaScript done right. It provides all of JavaScript's\n\tfunctionality wrapped in a cleaner, more succinct syntax. In the first\n\tbook on this exciting new language, CoffeeScript guru Trevor Burnham\n\tshows you how to hold onto all the power and flexibility of JavaScript\n\twhile writing clearer, cleaner, and safer code.\n      </p>", "id"=>2, "image_url"=>"cs.jpg", "price"=>"36.0", "title"=>"CoffeeScript", "updated_at"=>"2011-10-29T07:11:56Z"}, @prefix_options={}, @persisted=true>

>> puts p.price

36.0

=> nil

>> p.price = BigDecimal.new(p.price)-5

=> #<BigDecimal:39034b0,'0.31E2',9(27)>

>> p.save

=> true

>>

expire cache

rm -rf /home/rubys/git/awdwr/edition4/work-192/depot/tmp/cache

fetch storefront

get /

Your Pragmatic Catalog

CoffeeScript

CoffeeScript is JavaScript done right. It provides all of JavaScript's functionality wrapped in a cleaner, more succinct syntax. In the first book on this exciting new language, CoffeeScript guru Trevor Burnham shows you how to hold onto all the power and flexibility of JavaScript while writing clearer, cleaner, and safer code.

$31.00

Programming Ruby 1.9

Ruby is the fastest growing and most exciting dynamic language out there. If you need to get working programs delivered fast, you should add Ruby to your toolbox.

$49.95

Rails Test Prescriptions

Rails Test Prescriptions is a comprehensive guide to testing Rails applications, covering Test-Driven Development from both a theoretical perspective (why to test) and from a practical perspective (how to test effectively). It covers the core Rails testing tools and procedures for Rails 2 and Rails 3, and introduces popular add-ons, including Cucumber, Shoulda, Machinist, Mocha, and Rcov.

$34.95

fetch product (fallback in case storefront is cached)

get /login

post /login?locale=en

name => dave
password => secret

You are being redirected.

get http://localhost:3000/admin?locale=en

Welcome

It's 2011-10-29 03:27:48 -0400 We have 102 orders.

get /products/2

Title: CoffeeScript

Description: <p> CoffeeScript is JavaScript done right. It provides all of JavaScript's functionality wrapped in a cleaner, more succinct syntax. In the first book on this exciting new language, CoffeeScript guru Trevor Burnham shows you how to hold onto all the power and flexibility of JavaScript while writing clearer, cleaner, and safer code. </p>

Image url: cs.jpg

Price: 31.0

Edit | Back

edit app/models/order.rb

class Order < ActiveResource::Base

  self.site = 'http://dave:secret@localhost:3000/'

end

echo "Order.find(1).name\\nOrder.find(1).line_items\\n" | IRBRC=tmp/irbrc rails console

Loading development environment (Rails 3.2.0.beta)

Switch to inspect mode.

>> Order.find(1).name

=> "Dave Thomas"

>> Order.find(1).line_items

NoMethodError: undefined method `line_items' for #<Order:0x00000004623118>

	from /home/rubys/git/rails/activeresource/lib/active_resource/base.rb:1471:in `method_missing'

	from (irb):2

	from /home/rubys/git/rails/railties/lib/rails/commands/console.rb:45:in `start'

	from /home/rubys/git/rails/railties/lib/rails/commands/console.rb:8:in `start'

	from /home/rubys/git/rails/railties/lib/rails/commands.rb:41:in `<top (required)>'

	from script/rails:6:in `require'

	from script/rails:6:in `<main>'

>>

edit app/models/line_item.rb

class LineItem < ActiveResource::Base

  self.site = 'http://dave:secret@localhost:3000/orders/:order_id'

end

post /logout?locale=en

submit => Logout