12.4 Playtime 12.2 Iteration G2: Atom Feeds
demonstrate streaming with ActionController::Live
Switch to puma as a server
edit Gemfile
gem 'puma'
add a route for downloading a product
edit config/routes.rb
Rails.application.routes.draw do
resources :orders
resources :line_items
resources :carts
get 'store/index'
resources :products do
get :download, :on => :member
get :who_bought, on: :member
end
# The priority is based upon order of creation:
# first created -> highest priority.
# See how all your routes lay out with "rake routes".
# You can have the root of your site routed with "root"
root 'store#index', as: 'store'
# Example of regular route:
# get 'products/:id' => 'catalog#view'
# Example of named route that can be invoked with purchase_url(id: product.id)
# get 'products/:id/purchase' => 'catalog#purchase', as: :purchase
# Example resource route (maps HTTP verbs to controller actions automatically):
# resources :products
# Example resource route with options:
# resources :products do
# member do
# get 'short'
# post 'toggle'
# end
#
# collection do
# get 'sold'
# end
# end
# Example resource route with sub-resources:
# resources :products do
# resources :comments, :sales
# resource :seller
# end
# Example resource route with more complex sub-resources:
# resources :products do
# resources :comments
# resources :sales do
# get 'recent', on: :collection
# end
# end
# Example resource route with concerns:
# concern :toggleable do
# post 'toggle'
# end
# resources :posts, concerns: :toggleable
# resources :photos, concerns: :toggleable
# Example resource route within a namespace:
# namespace :admin do
# # Directs /admin/products/* to Admin::ProductsController
# # (app/controllers/admin/products_controller.rb)
# resources :products
# end
end
mock streaming implementation for download
edit app/controllers/products_controller.rb
include ActionController::Live
def download
response.headers['Content-Type'] = 'text/plain'
40.times do |i|
response.stream.write "Line #{i}\n\n"
sleep 0.10
end
response.stream.write "Fini.\n"
ensure
response.stream.close
end
add order to the session
edit app/controllers/orders_controller.rb
def create
@order = Order.new(order_params)
@order.add_line_items_from_cart(@cart)
respond_to do |format|
if @order.save
Cart.destroy(session[:cart_id])
session[:cart_id] = nil
session[:order_id] = @order.id
format.html { redirect_to store_url, notice:
'Thank you for your order.' }
format.json { render :show, status: :created,
location: @order }
else
format.html { render :new }
format.json { render json: @order.errors,
status: :unprocessable_entity }
end
end
end
render order in the side bar
edit app/views/layouts/application.html.erb
<!DOCTYPE html>
<html>
<head>
<title>Pragprog Books Online Store</title>
<%= stylesheet_link_tag "application", media: "all",
"data-turbolinks-track" => true %>
<%= javascript_include_tag "application", "data-turbolinks-track" => true %>
<%= csrf_meta_tags %>
</head>
<body class="<%= controller.controller_name %>">
<div id="banner">
<%= image_tag("logo.png") %>
<span class="title"><%= @page_title || "Pragmatic Bookshelf" %></span>
</div>
<div id="columns">
<div id="side">
<% if @cart %>
<%= hidden_div_if(@cart.line_items.empty?, id: 'cart') do %>
<%= render @cart %>
<% end %>
<% end %>
<%= render Order.find(session[:order_id]) if session[:order_id] -%>
<ul>
<li><a href="http://www....">Home</a></li>
<li><a href="http://www..../faq">Questions</a></li>
<li><a href="http://www..../news">News</a></li>
<li><a href="http://www..../contact">Contact</a></li>
</ul>
</div>
<div id="main">
<%= yield %>
</div>
</div>
</body>
</html>
implement order partial
edit app/views/orders/_order.html.erb
<div id="order">
<h2>Your Downloads</h2>
<table data-no-turbolink>
<% order.line_items.each do |item| %>
<tr>
<td><%= link_to item.product.title, download_product_path(item.product) %></td>
</tr>
<% end %>
</table>
</div>
css tweaks
edit app/assets/stylesheets/application.css.scss
#side {
padding: 1em 2em;
background: #141;
form, div {
display: inline;
}
input {
font-size: small;
}
#cart, #order {
font-size: smaller;
color: white;
a, a:hover {
color: white;
background-color: #141;
}
table {
border-top: 1px dotted #595;
border-bottom: 1px dotted #595;
margin-bottom: 10px;
}
}
ul {
padding: 0;
li {
list-style: none;
a {
color: #bfb;
font-size: small;
}
}
}
}
}
@media all and (max-width: 800px) {
#columns {
flex-direction: column-reverse;
}
}
@media all and (max-width: 500px) {
#banner {
height: 1em;
}
#banner .title {
display: none;
}
place an order
get /
Pragmatic Bookshelf
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.
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.
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.
post /line_items?product_id=2
get http://localhost:3000/
Pragmatic Bookshelf
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.
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.
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.
get /orders/new
post /orders
get http://localhost:3000/
Pragmatic Bookshelf
| CoffeeScript |
Thank you for your order.
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.
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.
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.
click download
get /products/2/download
Line 0
Line 1
Line 2
Line 3
Line 4
Line 5
Line 6
Line 7
Line 8
Line 9
Line 10
Line 11
Line 12
Line 13
Line 14
Line 15
Line 16
Line 17
Line 18
Line 19
Line 20
Line 21
Line 22
Line 23
Line 24
Line 25
Line 26
Line 27
Line 28
Line 29
Line 30
Line 31
Line 32
Line 33
Line 34
Line 35
Line 36
Line 37
Line 38
Line 39
Fini.
Switch back to WEBRick
edit Gemfile
# gem 'puma'
make sure that nothing is broken
rake test
Run options: --seed 13006
# Running:
........................................
Finished in 0.579213s, 69.0593 runs/s, 165.7422 assertions/s.
40 runs, 96 assertions, 0 failures, 0 errors, 0 skips