7.1 Iteration B1: Create the Catalog Listing 6.5 Iteration A4: Making Prettier Listings

ruby script/generate controller store index

      exists  app/controllers/

      exists  app/helpers/

      create  app/views/store

      exists  test/functional/

      exists  test/unit/helpers/

      create  app/controllers/store_controller.rb

      create  test/functional/store_controller_test.rb

      create  app/helpers/store_helper.rb

      create  test/unit/helpers/store_helper_test.rb

      create  app/views/store/index.html.erb

Restart the server.

get /store

edit app/controllers/store_controller.rb

class StoreController < ApplicationController

  def index

    @products = Product.find_products_for_sale

  end

end

edit app/models/product.rb

class Product < ActiveRecord::Base

  def self.find_products_for_sale

    find(:all, :order => "title")

  end

  # validation stuff...

  validates_presence_of :title, :description, :image_url

  validates_numericality_of :price

  validate :price_must_be_at_least_a_cent

  validates_uniqueness_of :title

  validates_format_of :image_url,

                      :with    => %r{\.(gif|jpg|png)$}i,

                      :message => 'must be a URL for GIF, JPG ' +

                                  'or PNG image.'

protected

  def price_must_be_at_least_a_cent

    errors.add(:price, 'should be at least 0.01') if price.nil? ||

                       price < 0.01

  end

end

edit app/views/store/index.html.erb

<h1>Your Pragmatic Catalog</h1>

<% @products.each do |product| -%>

  <div class="entry">

    <%= image_tag(product.image_url) %>

    <h3><%=h product.title %></h3>

    <%= product.description %>

    <div class="price-line">

    <span class="price"><%= product.price %></span>

    </div>

  </div>

<% end %>

get /store

Your Pragmatic Catalog

Pragmatic Project Automation

Pragmatic Project Automation shows you how to improve the consistency and repeatability of your project's procedures using automation to reduce risk and errors.

Simply put, we're going to put this thing called a computer to work for you doing the mundane (but important) project stuff. That means you'll have more time and energy to do the really exciting---and difficult---stuff, like writing quality code.

29.95

Pragmatic Unit Testing (C#)

Pragmatic programmers use feedback to drive their development and personal processes. The most valuable feedback you can get while coding comes from unit testing.

Without good tests in place, coding can become a frustrating game of "whack-a-mole." That's the carnival game where the player strikes at a mechanical mole; it retreats and another mole pops up on the opposite side of the field. The moles pop up and down so fast that you end up flailing your mallet helplessly as the moles continue to pop up where you least expect them.

27.75

Pragmatic Version Control

This book is a recipe-based approach to using Subversion that will get you up and running quickly---and correctly. All projects need version control: it's a foundational piece of any project's infrastructure. Yet half of all project teams in the U.S. don't use any version control at all. Many others don't use it well, and end up experiencing time-consuming problems.

28.5

7.1 Iteration B1: Create the Catalog Listing 6.5 Iteration A4: Making Prettier Listings