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
Working through the steps (checking that the Info,plist matches exactly), run the demo game and what appears is grey but does not fill th...
New
Title: Hands-On Rust (Chapter 11: prefab)
Just played a couple of amulet-less games. With a bit of debugging, I believe that your can_p...
New
In case this helps anyone, I’ve had issues setting up the rails source code. Here were the solutions:
In Gemfile, change
gem 'rails'
t...
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 think I might have found a problem involving SwitchCompat, thumbTint, and trackTint.
As entered, the SwitchCompat changes color to hol...
New
I found an issue in Chapter 7 regarding android:backgroundTint vs app:backgroundTint.
How to replicate:
load chapter-7 from zipfile i...
New
Is the book’s epub format available to read on Google Play Books?
New
On page 78 the following code appears:
<%= link_to ‘Destroy’, product,
class: ‘hover:underline’,
method: :delete,
data: { confirm...
New
Hi,
I am getting an error I cannot figure out on my test.
I have what I think is the exact code from the book, other than I changed “us...
New
Modern Front-End Development for Rails - application does not start after run bin/setup (page xviii)
After some hassle, I was able to finally run bin/setup, now I have started the rails server but I get this error message right when I vis...
New
Other popular topics
Instantly view the changes you make to an app with stateful hot reload, and define a declarative UI in the same language as the app logic...
New
Machine learning can be intimidating, with its reliance on math and algorithms that most programmers don't encounter in their regular wor...
New
Rust is an exciting new programming language combining the power of C with memory safety, fearless concurrency, and productivity boosters...
New
Oh just spent so much time on this to discover now that RancherOS is in end of life but Rancher is refusing to mark the Github repo as su...
New
Use WebRTC to build web applications that stream media and data in real time directly from one user to another, all in the browser.
...
New
I am trying to crate a game for the Nintendo switch, I wanted to use Java as I am comfortable with that programming language. Can you use...
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
Hello,
I’m a beginner in Android development and I’m facing an issue with my project setup. In my build.gradle.kts file, I have the foll...
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
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
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
- /nixos
- /debian
- /agda
- /deno
- /django
- /kubuntu
- /arch-linux
- /nodejs
- /spring
- /ubuntu
- /revery
- /manjaro
- /lua
- /julia
- /diversity
- /quarkus
- /markdown









