Agile Web Development with Rails, Edition 4

12.1 Iteration H1: Capturing an Order 11.4 Iteration F4: Hide an Empty Cart

11.5 Iteration F5: Making Images Clickable

Review our current storefront markup

edit app/views/store/index.html.erb
<p id="notice"><%= notice %></p>
 
<h1>Your Pragmatic Catalog</h1>
 
<% cache @products do %>
  <% @products.each do |product| %>
    <% cache product do %>
      <div class="entry">
        <%= image_tag(product.image_url) %>
        <h3><%= product.title %></h3>
        <%= sanitize(product.description) %>
        <div class="price_line">
          <span class="price"><%= number_to_currency(product.price) %></span>
          <%= button_to 'Add to Cart', line_items_path(product_id: product),
            remote: true %>
        </div>
      </div>
    <% end %>
  <% end %>
<% end %>

Associate image clicks with submit button clicks

edit app/assets/javascripts/store.coffee
# Place all the behaviors and hooks related to the matching controller here.
# All this logic will automatically be available in application.js.
# You can use CoffeeScript in this file: http://coffeescript.org/
 
$(document).on "ready page:change", ->
  $('.store .entry > img').click ->
    $(this).parent().find(':submit').click()

The page looks no different

get /

Your Cart

Rails, Angular, Postgres, and Bootstrap $45.00
Total $45.00

Your Pragmatic Catalog

Dcbang

Rails, Angular, Postgres, and Bootstrap

Powerful, Effective, and Efficient Full-Stack Web Development As a Rails developer, you care about user experience and performance, but you also want simple and maintainable code. Achieve all that by embracing the full stack of web development, from styling with Bootstrap, building an interactive user interface with AngularJS, to storing data quickly and reliably in PostgreSQL. Take a holistic view of full-stack development to create usable, high-performing applications, and learn to use these technologies effectively in a Ruby on Rails environment.

$45.00
Adrpo

Ruby Performance Optimization

Why Ruby Is Slow, and How to Fix It You don’t have to accept slow Ruby or Rails performance. In this comprehensive guide to Ruby optimization, you’ll learn how to write faster Ruby code—but that’s just the beginning. See exactly what makes Ruby and Rails code slow, and how to fix it. Alex Dymo will guide you through perils of memory and CPU optimization, profiling, measuring, performance testing, garbage collection, and tuning. You’ll find that all those “hard” things aren’t so difficult after all, and your code will run orders of magnitude faster.

$46.00
7apps

Seven Mobile Apps in Seven Weeks

Native Apps, Multiple Platforms Answer the question “Can we build this for ALL the devices?” with a resounding YES. This book will help you get there with a real-world introduction to seven platforms, whether you’re new to mobile or an experienced developer needing to expand your options. Plus, you’ll find out which cross-platform solution makes the most sense for your needs.

$26.00

Run tests

rake test
Run options: --seed 58803
 
# Running:
 
...............................
 
Finished in 0.595158s, 52.0870 runs/s, 131.0576 assertions/s.
 
31 runs, 78 assertions, 0 failures, 0 errors, 0 skips

12.1 Iteration H1: Capturing an Order 11.4 Iteration F4: Hide an Empty Cart