Andrei

Andrei

Agile Web Development with Rails 7: Missing instructions on building an Atom feed (page 181)

@rubys

On the page 181 it’s said:

We also don’t have time to build a full-fledged admin user interface right now, so we’ll take advantage of the various Atom feed readers that exist and have our app export all the orders as an Atom feed so the customer can quickly see what’s been purchased.

Looks like instructions on creating an Atom feed should follow right there, but they are missing. On the page 182 it’s said:

What We Just Did:

  • We provided a feed so the administrator can monitor incoming orders.

And on the page 183:

Playtime
Here’s some stuff to try on your own:

  • Get HTML- and JSON-formatted views working for who_bought requests. Experiment with including the order information in the JSON view by rendering @product.to_json(include: :orders). Do the same thing for XML using ActiveModel::Serializers::Xml.2

Looks like this task is related to the Atom feed that should have been built above.

Most Liked

rubys

rubys

Author of Agile Web Development With Rails

XML seems to be increasingly de-emphasized these days, but here is the essence of what was in that section:

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 < ApplicationRecord
  has_many :line_items
  has_many :orders, through: :line_items
  #...
end

Where Next?

Popular Pragmatic Bookshelf topics Top

brianokken
Many tasks_proj/tests directories exist in chapters 2, 3, 5 that have tests that use the custom markers smoke and get, which are not decl...
New
rmurray10127
Title: Intuitive Python: docker run… denied error (page 2) Attempted to run the docker command in both CLI and Powershell PS C:\Users\r...
New
brian-m-ops
#book-python-testing-with-pytest-second-edition Hi. Thanks for writing the book. I am just learning so this might just of been an issue ...
New
fynn
This is as much a suggestion as a question, as a note for others. Locally the SGP30 wasn’t available, so I ordered a SGP40. On page 53, ...
New
s2k
Hi all, currently I wonder how the Tailwind colours work (or don’t work). For example, in app/views/layouts/application.html.erb I have...
New
Henrai
Hi, I’m working on the Chapter 8 of the book. After I add add the point_offset, I’m still able to see acne: In the image above, I re...
New
EdBorn
Title: Agile Web Development with Rails 7: (page 70) I am running windows 11 pro with rails 7.0.3 and ruby 3.1.2p20 (2022-04-12 revision...
New
andreheijstek
After running /bin/setup, the first error was: The foreman' command exists in these Ruby versions: That was easy to fix: gem install fore...
New
dtonhofer
@parrt In the context of Chapter 4.3, the grammar Java.g4, meant to parse Java 6 compilation units, no longer passes ANTLR (currently 4....
New
dachristenson
@mfazio23 Android Studio will not accept anything I do when trying to use the Transformations class, as described on pp. 140-141. Googl...
New

Other popular topics Top

New
PragmaticBookshelf
Andy and Dave wrote this influential, classic book to help their clients create better software and rediscover the joy of coding. Almost ...
New
DevotionGeo
I know that -t flag is used along with -i flag for getting an interactive shell. But I cannot digest what the man page for docker run com...
New
AstonJ
You might be thinking we should just ask who’s not using VSCode :joy: however there are some new additions in the space that might give V...
New
AstonJ
We have a thread about the keyboards we have, but what about nice keyboards we come across that we want? If you have seen any that look n...
New
New
AstonJ
This looks like a stunning keycap set :orange_heart: A LEGENDARY KEYBOARD LIVES ON When you bought an Apple Macintosh computer in the e...
New
husaindevelop
Inside our android webview app, we are trying to paste the copied content from another app eg (notes) using navigator.clipboard.readtext ...
New
PragmaticBookshelf
Programming Ruby is the most complete book on Ruby, covering both the language itself and the standard library as well as commonly used t...
New
Fl4m3Ph03n1x
Background Lately I am in a quest to find a good quality TTS ai generation tool to run locally in order to create audio for some videos I...
New

Latest in Agile Web Development with Rails 7

Agile Web Development with Rails 7 Portal

Sub Categories: