24.3 Active Resources

<36.0> expected but was
<Using rake (10.0.2) >.
<0> expected to be
>=
<1>.

Traceback:
  /home/rubys/git/awdwr/edition4/checkdepot.rb:361:in `block in <class:DepotTest>'

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

      create

      create  README.rdoc

      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/views/layouts/application.html.erb

      create  app/mailers/.keep

      create  app/models/.keep

      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/locale.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/.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/favicon.ico

      create  public/index.html

      create  public/robots.txt

      create  script

      create  script/rails

      create  test/fixtures

      create  test/fixtures/.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/performance/browsing_test.rb

      create  test/test_helper.rb

      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

bundle install

Using rake (10.0.2)

Using i18n (0.6.1)

Using minitest (4.3.3)

Using multi_json (1.4.0)

Using tzinfo (0.3.35)

Using activesupport (4.0.0.beta)

Using builder (3.1.4)

Using erubis (2.7.0)

Using journey (2.0.0.20120723141804)

Using rack (1.4.1)

Using rack-test (0.6.2)

Using actionpack (4.0.0.beta)

Using mime-types (1.19)

Using polyglot (0.3.3)

Using treetop (1.4.12)

Using mail (2.5.3)

Using actionmailer (4.0.0.beta)

Using activemodel (4.0.0.beta)

Using activerecord-deprecated_finders (0.0.1)

Using arel (3.0.2.20120819075748)

Using activerecord (4.0.0.beta)

Using activeresource (4.0.0.beta)

Using bundler (1.2.3)

Using coffee-script-source (1.4.0)

Using execjs (1.4.0)

Using coffee-script (2.2.0)

Using json (1.7.5)

Using rdoc (3.12)

Using thor (0.16.0)

Using railties (4.0.0.beta)

Using coffee-rails (4.0.0.beta)

Using hike (1.2.1)

Using jquery-rails (2.1.4)

Using tilt (1.3.3)

Using sprockets (2.8.1)

Using sprockets-rails (2.0.0.rc1)

Using rails (4.0.0.beta)

Using sass (3.2.3)

Using sass-rails (4.0.0.beta)

Using sqlite3 (1.3.6)

Using turbolinks (0.6.1)

Using uglifier (1.3.0)

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

Add in the activeresource gem

edit Gemfile

# source 'https://rubygems.org'

# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'

gem "activeresource", :require => 'active_resource', :path => "/home/rubys/git/activeresource"

gem "activerecord-deprecated_finders", :path => "/home/rubys/git/activerecord-deprecated_finders"

gem "arel", :path => "/home/rubys/git/arel"

gem "journey", :path => "/home/rubys/git/journey"

gem 'rails', :path => "/home/rubys/git/rails" # '4.0.0.beta'

gem 'sqlite3'

# Gems used only for assets and not required

# in production environments by default.

group :assets do

  gem 'sprockets-rails', :path => "/home/rubys/git/sprockets-rails" # '~> 2.0.0.rc1'

  gem 'sass-rails',   :path => "/home/rubys/git/sass-rails" # '~> 4.0.0.beta'

  gem 'coffee-rails', :path => "/home/rubys/git/coffee-rails" # '~> 4.0.0.beta'

  # See https://github.com/sstephenson/execjs#readme for more supported runtimes

  # gem 'therubyracer', platforms: :ruby

  gem 'uglifier', '>= 1.0.3'

end

gem 'jquery-rails'

# Turbolinks makes following links in your web application faster. Read more: https://github.com/rails/turbolinks

gem 'turbolinks'

# To use ActiveModel has_secure_password

# gem 'bcrypt-ruby', '~> 3.0.0'

# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder

# gem 'jbuilder'

# Use unicorn as the app server

# gem 'unicorn'

# Deploy with Capistrano

# gem 'capistrano', group: :development

# To use debugger

# gem 'debugger'

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 4.0.0.beta)

Switch to inspect mode.

>> Product.find(2).title

LoadError: cannot load such file -- rails/observers/active_model/observing

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:227:in `require'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:227:in `block in require'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:210:in `block in load_dependency'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:614:in `new_constants_in'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:210:in `load_dependency'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:227:in `require'

	from /home/rubys/git/activeresource/lib/active_resource/observing.rb:1:in `<top (required)>'

	from /home/rubys/git/activeresource/lib/active_resource/base.rb:1541:in `<class:Base>'

	from /home/rubys/git/activeresource/lib/active_resource/base.rb:1537:in `<module:ActiveResource>'

	from /home/rubys/git/activeresource/lib/active_resource/base.rb:22:in `<top (required)>'

	from /home/rubys/git/awdwr/edition4/work-200/depot_client/app/models/product.rb:1:in `<top (required)>'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:422:in `load'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:422:in `block in load_file'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:614:in `new_constants_in'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:421:in `load_file'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:322:in `require_or_load'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:461:in `load_missing_constant'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:182:in `const_missing'

	from (irb):1

	from /home/rubys/git/rails/railties/lib/rails/commands/console.rb:78:in `start'

	from /home/rubys/git/rails/railties/lib/rails/commands/console.rb:9:in `start'

	from /home/rubys/git/rails/railties/lib/rails/commands.rb:71:in `<top (required)>'

	from script/rails:6:in `require'

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

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

    @line_item.product = product

    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

  get "sessions/create"

  get "sessions/destroy"

  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', via: :all

end

end

Disable CSRF checking

edit app/controllers/application_controller.rb

class ApplicationController < ActionController::Base

  before_filter :set_i18n_locale_from_params

  # ...

  before_filter :authorize

  # Prevent CSRF attacks by raising an exception.

  # For APIs, you may want to use :null_session instead.

  protect_from_forgery with: :reset_session

  private

    def current_cart

      Cart.find(session[:cart_id])

    rescue ActiveRecord::RecordNotFound

      cart = Cart.create

      session[:cart_id] = cart.id

      cart

end

    # ...

  protected

    def authorize

      if request.format == Mime::HTML

        unless User.find_by_id(session[:user_id])

          redirect_to login_url, notice: "Please log in"

end

      else

        authenticate_or_request_with_http_basic do |username, password|

          user = User.find_by_name(username)

          user && user.authenticate(password)

end

end

end

    def set_i18n_locale_from_params

      if params[:locale]

        if I18n.available_locales.include?(params[:locale].to_sym)

          I18n.locale = params[:locale]

        else

          flash.now[:notice] =

            "#{params[:locale]} translation not available"

          logger.error flash.now[:notice]

end

end

end

    def default_url_options

      { locale: I18n.locale }

end

end

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

Loading development environment (Rails 4.0.0.beta)

Switch to inspect mode.

>> Product.find(2).title

LoadError: cannot load such file -- rails/observers/active_model/observing

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:227:in `require'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:227:in `block in require'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:210:in `block in load_dependency'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:614:in `new_constants_in'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:210:in `load_dependency'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:227:in `require'

	from /home/rubys/git/activeresource/lib/active_resource/observing.rb:1:in `<top (required)>'

	from /home/rubys/git/activeresource/lib/active_resource/base.rb:1541:in `<class:Base>'

	from /home/rubys/git/activeresource/lib/active_resource/base.rb:1537:in `<module:ActiveResource>'

	from /home/rubys/git/activeresource/lib/active_resource/base.rb:22:in `<top (required)>'

	from /home/rubys/git/awdwr/edition4/work-200/depot_client/app/models/product.rb:1:in `<top (required)>'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:422:in `load'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:422:in `block in load_file'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:614:in `new_constants_in'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:421:in `load_file'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:322:in `require_or_load'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:461:in `load_missing_constant'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:182:in `const_missing'

	from (irb):1

	from /home/rubys/git/rails/railties/lib/rails/commands/console.rb:78:in `start'

	from /home/rubys/git/rails/railties/lib/rails/commands/console.rb:9:in `start'

	from /home/rubys/git/rails/railties/lib/rails/commands.rb:71:in `<top (required)>'

	from script/rails:6:in `require'

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

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 4.0.0.beta)

Switch to inspect mode.

>> p = Product.find(2)

LoadError: cannot load such file -- rails/observers/active_model/observing

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:227:in `require'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:227:in `block in require'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:210:in `block in load_dependency'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:614:in `new_constants_in'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:210:in `load_dependency'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:227:in `require'

	from /home/rubys/git/activeresource/lib/active_resource/observing.rb:1:in `<top (required)>'

	from /home/rubys/git/activeresource/lib/active_resource/base.rb:1541:in `<class:Base>'

	from /home/rubys/git/activeresource/lib/active_resource/base.rb:1537:in `<module:ActiveResource>'

	from /home/rubys/git/activeresource/lib/active_resource/base.rb:22:in `<top (required)>'

	from /home/rubys/git/awdwr/edition4/work-200/depot_client/app/models/product.rb:1:in `<top (required)>'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:422:in `load'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:422:in `block in load_file'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:614:in `new_constants_in'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:421:in `load_file'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:322:in `require_or_load'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:461:in `load_missing_constant'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:182:in `const_missing'

	from (irb):1

	from /home/rubys/git/rails/railties/lib/rails/commands/console.rb:78:in `start'

	from /home/rubys/git/rails/railties/lib/rails/commands/console.rb:9:in `start'

	from /home/rubys/git/rails/railties/lib/rails/commands.rb:71:in `<top (required)>'

	from script/rails:6:in `require'

	from script/rails:6:in `<main>'>> puts p.price

NoMethodError: undefined method `price' for nil:NilClass

	from (irb):2

	from /home/rubys/git/rails/railties/lib/rails/commands/console.rb:78:in `start'

	from /home/rubys/git/rails/railties/lib/rails/commands/console.rb:9:in `start'

	from /home/rubys/git/rails/railties/lib/rails/commands.rb:71:in `<top (required)>'

	from script/rails:6:in `require'

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

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

NoMethodError: undefined method `price' for nil:NilClass

	from (irb):3

	from /home/rubys/git/rails/railties/lib/rails/commands/console.rb:78:in `start'

	from /home/rubys/git/rails/railties/lib/rails/commands/console.rb:9:in `start'

	from /home/rubys/git/rails/railties/lib/rails/commands.rb:71:in `<top (required)>'

	from script/rails:6:in `require'

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

>> p.save

NoMethodError: undefined method `save' for nil:NilClass

	from (irb):4

	from /home/rubys/git/rails/railties/lib/rails/commands/console.rb:78:in `start'

	from /home/rubys/git/rails/railties/lib/rails/commands/console.rb:9:in `start'

	from /home/rubys/git/rails/railties/lib/rails/commands.rb:71:in `<top (required)>'

	from script/rails:6:in `require'

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

>>

expire cache

rm -rf /home/rubys/git/awdwr/edition4/work-200/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.

$36.00

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 2012-12-08 09:32:39 -0500 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: 36.0

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 4.0.0.beta)

Switch to inspect mode.

>> Order.find(1).name

LoadError: cannot load such file -- rails/observers/active_model/observing

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:227:in `require'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:227:in `block in require'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:210:in `block in load_dependency'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:614:in `new_constants_in'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:210:in `load_dependency'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:227:in `require'

	from /home/rubys/git/activeresource/lib/active_resource/observing.rb:1:in `<top (required)>'

	from /home/rubys/git/activeresource/lib/active_resource/base.rb:1541:in `<class:Base>'

	from /home/rubys/git/activeresource/lib/active_resource/base.rb:1537:in `<module:ActiveResource>'

	from /home/rubys/git/activeresource/lib/active_resource/base.rb:22:in `<top (required)>'

	from /home/rubys/git/awdwr/edition4/work-200/depot_client/app/models/order.rb:1:in `<top (required)>'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:422:in `load'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:422:in `block in load_file'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:614:in `new_constants_in'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:421:in `load_file'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:322:in `require_or_load'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:461:in `load_missing_constant'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:182:in `const_missing'

	from (irb):1

	from /home/rubys/git/rails/railties/lib/rails/commands/console.rb:78:in `start'

	from /home/rubys/git/rails/railties/lib/rails/commands/console.rb:9:in `start'

	from /home/rubys/git/rails/railties/lib/rails/commands.rb:71:in `<top (required)>'

	from script/rails:6:in `require'

	from script/rails:6:in `<main>'>> Order.find(1).line_items

LoadError: cannot load such file -- rails/observers/active_model/observing

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:227:in `require'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:227:in `block in require'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:210:in `block in load_dependency'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:614:in `new_constants_in'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:210:in `load_dependency'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:227:in `require'

	from /home/rubys/git/activeresource/lib/active_resource/observing.rb:1:in `<top (required)>'

	from /home/rubys/git/activeresource/lib/active_resource/base.rb:1541:in `<class:Base>'

	from /home/rubys/git/activeresource/lib/active_resource/base.rb:1537:in `<module:ActiveResource>'

	from /home/rubys/git/activeresource/lib/active_resource/base.rb:22:in `<top (required)>'

	from /home/rubys/git/awdwr/edition4/work-200/depot_client/app/models/order.rb:1:in `<top (required)>'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:422:in `load'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:422:in `block in load_file'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:614:in `new_constants_in'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:421:in `load_file'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:322:in `require_or_load'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:461:in `load_missing_constant'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:182:in `const_missing'

	from (irb):2

	from /home/rubys/git/rails/railties/lib/rails/commands/console.rb:78:in `start'

	from /home/rubys/git/rails/railties/lib/rails/commands/console.rb:9:in `start'

	from /home/rubys/git/rails/railties/lib/rails/commands.rb:71: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

You are being redirected.

get http://localhost:3000/en

Logged out

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echo "LineItem.find(:all, :params => {:order_id=>1})" | IRBRC=tmp/irbrc rails console

Loading development environment (Rails 4.0.0.beta)

Switch to inspect mode.

>> LineItem.find(:all, :params => {:order_id=>1})

LoadError: cannot load such file -- rails/observers/active_model/observing

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:227:in `require'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:227:in `block in require'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:210:in `block in load_dependency'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:614:in `new_constants_in'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:210:in `load_dependency'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:227:in `require'

	from /home/rubys/git/activeresource/lib/active_resource/observing.rb:1:in `<top (required)>'

	from /home/rubys/git/activeresource/lib/active_resource/base.rb:1541:in `<class:Base>'

	from /home/rubys/git/activeresource/lib/active_resource/base.rb:1537:in `<module:ActiveResource>'

	from /home/rubys/git/activeresource/lib/active_resource/base.rb:22:in `<top (required)>'

	from /home/rubys/git/awdwr/edition4/work-200/depot_client/app/models/line_item.rb:1:in `<top (required)>'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:422:in `load'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:422:in `block in load_file'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:614:in `new_constants_in'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:421:in `load_file'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:322:in `require_or_load'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:461:in `load_missing_constant'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:182:in `const_missing'

	from (irb):1

	from /home/rubys/git/rails/railties/lib/rails/commands/console.rb:78:in `start'

	from /home/rubys/git/rails/railties/lib/rails/commands/console.rb:9:in `start'

	from /home/rubys/git/rails/railties/lib/rails/commands.rb:71:in `<top (required)>'

	from script/rails:6:in `require'

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

get /orders/1/line_items.json

[{"line_item":{"id":10,"product_id":2,"cart_id":null,"created_at":"2012-12-08T14:26:44Z","updated_at":"2012-12-08T14:27:21Z","quantity":1,"price":"36.0","order_id":1}},{"line_item":{"id":11,"product_id":2,"cart_id":null,"created_at":"2012-12-08T14:30:46Z","updated_at":"2012-12-08T14:30:56Z","quantity":2,"price":"36.0","order_id":102}}]

edit app/controllers/line_items_controller.rb

  def index

    @line_items = LineItem.all

    respond_to do |format|

      format.html # index.html.erb

      format.json { render json: @line_items }

      format.xml { render xml: @line_items }

end

end

get /orders/1/line_items.xml

<?xml version="1.0" encoding="UTF-8"?>

<line-items type="array">

  <line-item>

    <id type="integer">10</id>

    <product-id type="integer">2</product-id>

    <cart-id type="integer" nil="true"/>

    <created-at type="dateTime">2012-12-08T14:26:44Z</created-at>

    <updated-at type="dateTime">2012-12-08T14:27:21Z</updated-at>

    <quantity type="integer">1</quantity>

    <price type="decimal">36.0</price>

    <order-id type="integer">1</order-id>

  </line-item>

  <line-item>

    <id type="integer">11</id>

    <product-id type="integer">2</product-id>

    <cart-id type="integer" nil="true"/>

    <created-at type="dateTime">2012-12-08T14:30:46Z</created-at>

    <updated-at type="dateTime">2012-12-08T14:30:56Z</updated-at>

    <quantity type="integer">2</quantity>

    <price type="decimal">36.0</price>

    <order-id type="integer">102</order-id>

  </line-item>

</line-items>

echo "LineItem.format = :xml\\nli = LineItem.find(:all, :params => {:order_id=>1}).first\\nputs li.price\\nli.price *= 0.8\\nli.save" | IRBRC=tmp/irbrc rails console

Loading development environment (Rails 4.0.0.beta)

Switch to inspect mode.

>> LineItem.format = :xml

LoadError: cannot load such file -- rails/observers/active_model/observing

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:227:in `require'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:227:in `block in require'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:210:in `block in load_dependency'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:614:in `new_constants_in'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:210:in `load_dependency'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:227:in `require'

	from /home/rubys/git/activeresource/lib/active_resource/observing.rb:1:in `<top (required)>'

	from /home/rubys/git/activeresource/lib/active_resource/base.rb:1541:in `<class:Base>'

	from /home/rubys/git/activeresource/lib/active_resource/base.rb:1537:in `<module:ActiveResource>'

	from /home/rubys/git/activeresource/lib/active_resource/base.rb:22:in `<top (required)>'

	from /home/rubys/git/awdwr/edition4/work-200/depot_client/app/models/line_item.rb:1:in `<top (required)>'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:422:in `load'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:422:in `block in load_file'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:614:in `new_constants_in'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:421:in `load_file'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:322:in `require_or_load'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:461:in `load_missing_constant'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:182:in `const_missing'

	from (irb):1

	from /home/rubys/git/rails/railties/lib/rails/commands/console.rb:78:in `start'

	from /home/rubys/git/rails/railties/lib/rails/commands/console.rb:9:in `start'

	from /home/rubys/git/rails/railties/lib/rails/commands.rb:71:in `<top (required)>'

	from script/rails:6:in `require'

	from script/rails:6:in `<main>'>> li = LineItem.find(:all, :params => {:order_id=>1}).first

LoadError: cannot load such file -- rails/observers/active_model/observing

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:227:in `require'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:227:in `block in require'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:210:in `block in load_dependency'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:614:in `new_constants_in'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:210:in `load_dependency'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:227:in `require'

	from /home/rubys/git/activeresource/lib/active_resource/observing.rb:1:in `<top (required)>'

	from /home/rubys/git/activeresource/lib/active_resource/base.rb:1541:in `<class:Base>'

	from /home/rubys/git/activeresource/lib/active_resource/base.rb:1537:in `<module:ActiveResource>'

	from /home/rubys/git/activeresource/lib/active_resource/base.rb:22:in `<top (required)>'

	from /home/rubys/git/awdwr/edition4/work-200/depot_client/app/models/line_item.rb:1:in `<top (required)>'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:422:in `load'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:422:in `block in load_file'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:614:in `new_constants_in'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:421:in `load_file'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:322:in `require_or_load'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:461:in `load_missing_constant'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:182:in `const_missing'

	from (irb):2

	from /home/rubys/git/rails/railties/lib/rails/commands/console.rb:78:in `start'

	from /home/rubys/git/rails/railties/lib/rails/commands/console.rb:9:in `start'

	from /home/rubys/git/rails/railties/lib/rails/commands.rb:71:in `<top (required)>'

	from script/rails:6:in `require'

	from script/rails:6:in `<main>'>> puts li.price

NoMethodError: undefined method `price' for nil:NilClass

	from (irb):3

	from /home/rubys/git/rails/railties/lib/rails/commands/console.rb:78:in `start'

	from /home/rubys/git/rails/railties/lib/rails/commands/console.rb:9:in `start'

	from /home/rubys/git/rails/railties/lib/rails/commands.rb:71:in `<top (required)>'

	from script/rails:6:in `require'

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

>> li.price *= 0.8

NoMethodError: undefined method `price' for nil:NilClass

	from (irb):4

	from /home/rubys/git/rails/railties/lib/rails/commands/console.rb:78:in `start'

	from /home/rubys/git/rails/railties/lib/rails/commands/console.rb:9:in `start'

	from /home/rubys/git/rails/railties/lib/rails/commands.rb:71:in `<top (required)>'

	from script/rails:6:in `require'

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

>> li.save

NoMethodError: undefined method `save' for nil:NilClass

	from (irb):5

	from /home/rubys/git/rails/railties/lib/rails/commands/console.rb:78:in `start'

	from /home/rubys/git/rails/railties/lib/rails/commands/console.rb:9:in `start'

	from /home/rubys/git/rails/railties/lib/rails/commands.rb:71:in `<top (required)>'

	from script/rails:6:in `require'

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

>>

echo "li2 = LineItem.new(:order_id=>1, :product_id=>2, :quantity=>1, :price=>0.0)\\nli2.save" | IRBRC=tmp/irbrc rails console

Loading development environment (Rails 4.0.0.beta)

Switch to inspect mode.

>> li2 = LineItem.new(:order_id=>1, :product_id=>2, :quantity=>1, :price=>0.0)

LoadError: cannot load such file -- rails/observers/active_model/observing

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:227:in `require'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:227:in `block in require'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:210:in `block in load_dependency'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:614:in `new_constants_in'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:210:in `load_dependency'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:227:in `require'

	from /home/rubys/git/activeresource/lib/active_resource/observing.rb:1:in `<top (required)>'

	from /home/rubys/git/activeresource/lib/active_resource/base.rb:1541:in `<class:Base>'

	from /home/rubys/git/activeresource/lib/active_resource/base.rb:1537:in `<module:ActiveResource>'

	from /home/rubys/git/activeresource/lib/active_resource/base.rb:22:in `<top (required)>'

	from /home/rubys/git/awdwr/edition4/work-200/depot_client/app/models/line_item.rb:1:in `<top (required)>'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:422:in `load'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:422:in `block in load_file'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:614:in `new_constants_in'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:421:in `load_file'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:322:in `require_or_load'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:461:in `load_missing_constant'

	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:182:in `const_missing'

	from (irb):1

	from /home/rubys/git/rails/railties/lib/rails/commands/console.rb:78:in `start'

	from /home/rubys/git/rails/railties/lib/rails/commands/console.rb:9:in `start'

	from /home/rubys/git/rails/railties/lib/rails/commands.rb:71:in `<top (required)>'

	from script/rails:6:in `require'

	from script/rails:6:in `<main>'>> li2.save

NoMethodError: undefined method `save' for nil:NilClass

	from (irb):2

	from /home/rubys/git/rails/railties/lib/rails/commands/console.rb:78:in `start'

	from /home/rubys/git/rails/railties/lib/rails/commands/console.rb:9:in `start'

	from /home/rubys/git/rails/railties/lib/rails/commands.rb:71:in `<top (required)>'

	from script/rails:6:in `require'

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

>>

25.1 rack 22 Caching

Agile Web Development with Rails, Edition 4

24.3 Active Resources

Your Cart

Your Pragmatic Catalog

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Welcome

Your Cart

Your Pragmatic Catalog

CoffeeScript

Programming Ruby 1.9

Rails Test Prescriptions