Agile Web Development with Rails, Edition 4

12.3 Iteration G3: Downloading an eBook 12.1 Iteration G1: Capturing an Order

Missing <summary type="xhtml">.
<0> expected to be
>=
<1>.

Traceback:
  /home/rubys/git/awdwr/edition4/checkdepot.rb:239:in `block in <class:DepotTest>'

Demonstrate various respond_to/format options, as well as "through" relations and basic authentication.

Define a "who_bought" member action

edit app/controllers/products_controller.rb

  def who_bought

    @product = Product.find(params[:id])

    @latest_order = @product.orders.order(:updated_at).last

    if stale?(@latest_order)

      respond_to do |format|

        format.atom

      end

    end

  end

Define an Atom view (using the Atom builder)

edit app/views/products/who_bought.atom.builder

atom_feed do |feed|

  feed.title "Who bought #{@product.title}"

  feed.updated @latest_order.try(:updated_at) 

  @product.orders.each do |order|

    feed.entry(order) do |entry|

      entry.title "Order #{order.id}"

      entry.summary type: 'xhtml' do |xhtml|

        xhtml.p "Shipped to #{order.address}"

        xhtml.table do

          xhtml.tr do

            xhtml.th 'Product'

            xhtml.th 'Quantity'

            xhtml.th 'Total Price'

          end

          order.line_items.each do |item|

            xhtml.tr do

              xhtml.td item.product.title

              xhtml.td item.quantity

              xhtml.td number_to_currency item.total_price

            end

          end

          xhtml.tr do

            xhtml.th 'total', colspan: 2

            xhtml.th number_to_currency \

              order.line_items.map(&:total_price).sum

          end

        end

        xhtml.p "Paid by #{order.pay_type}"

      end

      entry.author do |author|

        author.name order.name

        author.email order.email

      end

    end

  end

end

Add "orders" to the Product class

edit app/models/product.rb

class Product < ActiveRecord::Base

  has_many :line_items

  has_many :orders, through: :line_items

  #...

end

Add to the routes

edit config/routes.rb

Rails.application.routes.draw do

  resources :orders

  resources :line_items

  resources :carts

  get 'store/index'

  resources :products do

    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'

  # ...

end

Fetch the Atom feed

curl --max-time 15 --silent --user dave:secret http://localhost:3000/products/2/who_bought.atom

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

<feed xml:lang="en-US" xmlns="http://www.w3.org/2005/Atom">

  <id>tag:localhost,2005:/products/2/who_bought</id>

  <link rel="alternate" type="text/html" href="http://localhost:3000"/>

  <link rel="self" type="application/atom+xml" href="http://localhost:3000/products/2/who_bought.atom"/>

  <title>Who bought CoffeeScript</title>

  <updated>2015-03-30T10:45:55Z</updated>

</feed>

Look at the headers

curl --max-time 15 --silent --dump - --output /dev/null --user dave:secret http://localhost:3000/products/2/who_bought.atom

HTTP/1.1 200 OK 

X-Frame-Options: SAMEORIGIN

X-Xss-Protection: 1; mode=block

X-Content-Type-Options: nosniff

Content-Type: application/atom+xml; charset=utf-8

Etag: W/"2546f102cf1a26e3d203e890ec5cdd06"

Cache-Control: max-age=0, private, must-revalidate

X-Request-Id: 44564ec5-9a8b-45fe-92bc-8533ebad8c1a

X-Runtime: 0.005402

Server: WEBrick/1.3.1 (Ruby/2.3.0/2015-03-30)

Date: Mon, 30 Mar 2015 10:45:55 GMT

Content-Length: 420

Connection: Keep-Alive

curl --max-time 15 --silent --dump - --output /dev/null --user dave:secret http://localhost:3000/products/2/who_bought.atom -H 'If-None-Match: W/"2546f102cf1a26e3d203e890ec5cdd06"'

HTTP/1.1 304 Not Modified 

X-Frame-Options: SAMEORIGIN

X-Xss-Protection: 1; mode=block

X-Content-Type-Options: nosniff

Etag: W/"2546f102cf1a26e3d203e890ec5cdd06"

Cache-Control: max-age=0, private, must-revalidate

X-Request-Id: 81e10997-877e-4f53-9b8e-489baa501465

X-Runtime: 0.005150

Server: WEBrick/1.3.1 (Ruby/2.3.0/2015-03-30)

Date: Mon, 30 Mar 2015 10:45:55 GMT

Connection: Keep-Alive

curl --max-time 15 --silent --dump - --output /dev/null --user dave:secret http://localhost:3000/products/2/who_bought.atom -H 'If-Modified-Since: '

HTTP/1.1 200 OK 

X-Frame-Options: SAMEORIGIN

X-Xss-Protection: 1; mode=block

X-Content-Type-Options: nosniff

Content-Type: application/atom+xml; charset=utf-8

Etag: W/"2546f102cf1a26e3d203e890ec5cdd06"

Cache-Control: max-age=0, private, must-revalidate

X-Request-Id: ab674664-eda8-4c3f-a9f9-0cce6a8924a8

X-Runtime: 0.006826

Server: WEBrick/1.3.1 (Ruby/2.3.0/2015-03-30)

Date: Mon, 30 Mar 2015 10:45:55 GMT

Content-Length: 420

Connection: Keep-Alive

12.3 Iteration G3: Downloading an eBook 12.1 Iteration G1: Capturing an Order