Andrei
Agile Web Development with Rails 7: Missing instructions on building an Atom feed (page 181)
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
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
1
Popular Pragmatic Bookshelf topics
Following the steps described in Chapter 6 of the book, I’m stuck with running the migration as described on page 84:
bundle exec sequel...
New
I’m new to Rust and am using this book to learn more as well as to feed my interest in game dev. I’ve just finished the flappy dragon exa...
New
I’m under the impression that when the reader gets to page 136 (“View Data with the Database Inspector”), the code SHOULD be able to buil...
New
Hi,
I completed chapter 6 but am getting the following error when running:
thread 'main' panicked at 'Failed to load texture: IoError(O...
New
The markup used to display the uploaded image results in a Phoenix.LiveView.HTMLTokenizer.ParseError error.
lib/pento_web/live/product_l...
New
It seems the second code snippet is missing the code to set the current_user:
current_user: Accounts.get_user_by_session_token(session["...
New
AWDWR 7, page 152, page 153:
Hello everyone,
I’m a little bit lost on the hotwire part. I didn’t fully understand it.
On page 152 @rub...
New
Docker-Machine became part of the Docker Toolbox, which was deprecated in 2020, long after Docker Desktop supported Docker Engine nativel...
New
@mfazio23
I’ve applied the changes from Chapter 5 of the book and everything builds correctly and runs. But, when I try to start a game,...
New
Is there any plan for volume 2? :slight_smile:
New
Other popular topics
Hello Devtalk World!
Please let us know a little about who you are and where you’re from :nerd_face:
New
Algorithms and data structures are much more than abstract concepts. Mastering them enables you to write code that runs faster and more e...
New
Brace yourself for a fun challenge: build a photorealistic 3D renderer from scratch! In just a couple of weeks, build a ray tracer that r...
New
New
poll
poll
Be sure to check out @Dusty’s article posted here: An Introduction to Alternative Keyboard Layouts It’s one of the best write-...
New
Create efficient, elegant software tests in pytest, Python's most powerful testing framework.
Brian Okken @brianokken
Edited by Kat...
New
If you want a quick and easy way to block any website on your Mac using Little Snitch simply…
File > New Rule:
And select Deny, O...
New
Develop, deploy, and debug BEAM applications using BEAMOps: a new paradigm that focuses on scalability, fault tolerance, and owning each ...
New
I’m able to do the “artistic” part of game-development; character designing/modeling, music, environment modeling, etc.
However, I don’t...
New
Escape callback hell and ship fast, clean code that reads as smoothly as it runs. Squash bugs and stamp out memory leaks with an intuitiv...
New
Latest in Agile Web Development with Rails 7
Categories:
Sub Categories:
Popular Portals
- /elixir
- /rust
- /wasm
- /ruby
- /erlang
- /phoenix
- /keyboards
- /python
- /js
- /rails
- /security
- /go
- /swift
- /vim
- /java
- /clojure
- /emacs
- /haskell
- /typescript
- /svelte
- /onivim
- /kotlin
- /c-plus-plus
- /crystal
- /tailwind
- /react
- /gleam
- /ocaml
- /elm
- /vscode
- /flutter
- /html
- /ash
- /deepseek
- /zig
- /opensuse
- /centos
- /php
- /scala
- /react-native
- /lisp
- /textmate
- /sublime-text
- /debian
- /nixos
- /agda
- /deno
- /django
- /kubuntu
- /arch-linux
- /nodejs
- /spring
- /ubuntu
- /revery
- /manjaro
- /diversity
- /lua
- /julia
- /quarkus
- /markdown









