Iteration A1.

app/assets/javascripts/products.coffee

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+# 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/

app/assets/stylesheets/products.scss

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+// Place all the styles related to the Products controller here.
+// They will automatically be included in application.css.
+// You can use Sass (SCSS) here: http://sass-lang.com/

app/assets/stylesheets/scaffolds.scss

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+body {
+  background-color: #fff;
+  color: #333;
+  font-family: verdana, arial, helvetica, sans-serif;
+  font-size: 13px;
+  line-height: 18px;
+  margin: 33px;
+}
+
+p, ol, ul, td {
+  font-family: verdana, arial, helvetica, sans-serif;
+  font-size: 13px;
+  line-height: 18px;
+  margin: 33px;
+}
+
+pre {
+  background-color: #eee;
+  padding: 10px;
+  font-size: 11px;
+}
+
+a {
+  color: #000;
+
+  &:visited {
+    color: #666;
+  }
+
+  &:hover {
+    color: #fff;
+    background-color: #000;
+  }
+}
+
+th {
+  padding-bottom: 5px;
+}
+
+td {
+  padding-bottom: 7px;
+  padding-left: 5px;
+  padding-right: 5px;
+}
+
+div {
+  &.field, &.actions {
+    margin-bottom: 10px;
+  }
+}
+
+#notice {
+  color: green;
+}
+
+.field_with_errors {
+  padding: 2px;
+  background-color: red;
+  display: table;
+}
+
+#error_explanation {
+  width: 450px;
+  border: 2px solid red;
+  padding: 7px;
+  padding-bottom: 0;
+  margin-bottom: 20px;
+  background-color: #f0f0f0;
+
+  h2 {
+    text-align: left;
+    font-weight: bold;
+    padding: 5px 5px 5px 15px;
+    font-size: 12px;
+    margin: -7px;
+    margin-bottom: 0;
+    background-color: #c00;
+    color: #fff;
+  }
+
+  ul li {
+    font-size: 12px;
+    list-style: square;
+  }
+}
+
+label {
+  display: block;
+}

app/controllers/products_controller.rb

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+class ProductsController < ApplicationController
+  before_action :set_product, only: [:show, :edit, :update, :destroy]
+
+  # GET /products
+  # GET /products.json
+  def index
+    @products = Product.all
+  end
+
+  # GET /products/1
+  # GET /products/1.json
+  def show
+  end
+
+  # GET /products/new
+  def new
+    @product = Product.new
+  end
+
+  # GET /products/1/edit
+  def edit
+  end
+
+  # POST /products
+  # POST /products.json
+  def create
+    @product = Product.new(product_params)
+
+    respond_to do |format|
+      if @product.save
+        format.html { redirect_to @product, notice: 'Product was successfully created.' }
+        format.json { render :show, status: :created, location: @product }
+      else
+        format.html { render :new }
+        format.json { render json: @product.errors, status: :unprocessable_entity }
+      end
+    end
+  end
+
+  # PATCH/PUT /products/1
+  # PATCH/PUT /products/1.json
+  def update
+    respond_to do |format|
+      if @product.update(product_params)
+        format.html { redirect_to @product, notice: 'Product was successfully updated.' }
+        format.json { render :show, status: :ok, location: @product }
+      else
+        format.html { render :edit }
+        format.json { render json: @product.errors, status: :unprocessable_entity }
+      end
+    end
+  end
+
+  # DELETE /products/1
+  # DELETE /products/1.json
+  def destroy
+    @product.destroy
+    respond_to do |format|
+      format.html { redirect_to products_url, notice: 'Product was successfully destroyed.' }
+      format.json { head :no_content }
+    end
+  end
+
+  private
+    # Use callbacks to share common setup or constraints between actions.
+    def set_product
+      @product = Product.find(params[:id])
+    end
+
+    # Never trust parameters from the scary internet, only allow the white list through.
+    def product_params
+      params.require(:product).permit(:title, :description, :image_url, :price)
+    end
+end

app/helpers/products_helper.rb

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+module ProductsHelper
+end

app/models/product.rb

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+class Product < ApplicationRecord
+end

app/views/products/_form.html.erb

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+<%= form_for(product) do |f| %>
+  <% if product.errors.any? %>
+    <div id="error_explanation">
+      <h2><%= pluralize(product.errors.count, "error") %> prohibited this product from being saved:</h2>
+
+      <ul>
+      <% product.errors.full_messages.each do |message| %>
+        <li><%= message %></li>
+      <% end %>
+      </ul>
+    </div>
+  <% end %>
+
+  <div class="field">
+    <%= f.label :title %>
+    <%= f.text_field :title %>
+  </div>
+
+  <div class="field">
+    <%= f.label :description %>
+    <%= f.text_area :description, rows: 10, cols: 60 %>
+  </div>
+
+  <div class="field">
+    <%= f.label :image_url %>
+    <%= f.text_field :image_url %>
+  </div>
+
+  <div class="field">
+    <%= f.label :price %>
+    <%= f.text_field :price %>
+  </div>
+
+  <div class="actions">
+    <%= f.submit %>
+  </div>
+<% end %>

app/views/products/_product.json.jbuilder

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+json.extract! product, :id, :title, :description, :image_url, :price, :created_at, :updated_at
+json.url product_url(product, format: :json)

app/views/products/edit.html.erb

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+<h1>Editing Product</h1>
+
+<%= render 'form', product: @product %>
+
+<%= link_to 'Show', @product %> |
+<%= link_to 'Back', products_path %>

app/views/products/index.html.erb

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+<p id="notice"><%= notice %></p>
+
+<h1>Products</h1>
+
+<table>
+  <thead>
+    <tr>
+      <th>Title</th>
+      <th>Description</th>
+      <th>Image url</th>
+      <th>Price</th>
+      <th colspan="3"></th>
+    </tr>
+  </thead>
+
+  <tbody>
+    <% @products.each do |product| %>
+      <tr>
+        <td><%= product.title %></td>
+        <td><%= product.description %></td>
+        <td><%= product.image_url %></td>
+        <td><%= product.price %></td>
+        <td><%= link_to 'Show', product %></td>
+        <td><%= link_to 'Edit', edit_product_path(product) %></td>
+        <td><%= link_to 'Destroy', product, method: :delete, data: { confirm: 'Are you sure?' } %></td>
+      </tr>
+    <% end %>
+  </tbody>
+</table>
+
+<br>
+
+<%= link_to 'New Product', new_product_path %>

app/views/products/index.json.jbuilder

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+json.array! @products, partial: 'products/product', as: :product

app/views/products/new.html.erb

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+<h1>New Product</h1>
+
+<%= render 'form', product: @product %>
+
+<%= link_to 'Back', products_path %>

app/views/products/show.html.erb

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+<p id="notice"><%= notice %></p>
+
+<p>
+  <strong>Title:</strong>
+  <%= @product.title %>
+</p>
+
+<p>
+  <strong>Description:</strong>
+  <%= @product.description %>
+</p>
+
+<p>
+  <strong>Image url:</strong>
+  <%= @product.image_url %>
+</p>
+
+<p>
+  <strong>Price:</strong>
+  <%= @product.price %>
+</p>
+
+<%= link_to 'Edit', edit_product_path(@product) %> |
+<%= link_to 'Back', products_path %>

app/views/products/show.json.jbuilder

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+json.partial! "products/product", product: @product

config/routes.rb

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 Rails.application.routes.draw do
+  resources :products
   # For details on the DSL available within this file, see http://guides.rubyonrails.org/routing.html
 end

db/migrate/20161115133900_create_products.rb

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+class CreateProducts < ActiveRecord::Migration[5.0]
+  def change
+    create_table :products do |t|
+      t.string :title
+      t.text :description
+      t.string :image_url
+      t.decimal :price, precision: 8, scale: 2
+
+      t.timestamps
+    end
+  end
+end

db/schema.rb

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+# This file is auto-generated from the current state of the database. Instead
+# of editing this file, please use the migrations feature of Active Record to
+# incrementally modify your database, and then regenerate this schema definition.
+#
+# Note that this schema.rb definition is the authoritative source for your
+# database schema. If you need to create the application database on another
+# system, you should be using db:schema:load, not running all the migrations
+# from scratch. The latter is a flawed and unsustainable approach (the more migrations
+# you'll amass, the slower it'll run and the greater likelihood for issues).
+#
+# It's strongly recommended that you check this file into your version control system.
+
+ActiveRecord::Schema.define(version: 20161115133900) do
+
+  create_table "products", force: :cascade do |t|
+    t.string   "title"
+    t.text     "description"
+    t.string   "image_url"
+    t.decimal  "price",       precision: 8, scale: 2
+    t.datetime "created_at",                          null: false
+    t.datetime "updated_at",                          null: false
+  end
+
+end

test/controllers/products_controller_test.rb

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+require 'test_helper'
+
+class ProductsControllerTest < ActionDispatch::IntegrationTest
+  setup do
+    @product = products(:one)
+  end
+
+  test "should get index" do
+    get products_url
+    assert_response :success
+  end
+
+  test "should get new" do
+    get new_product_url
+    assert_response :success
+  end
+
+  test "should create product" do
+    assert_difference('Product.count') do
+      post products_url, params: { product: { description: @product.description, image_url: @product.image_url, price: @product.price, title: @product.title } }
+    end
+
+    assert_redirected_to product_url(Product.last)
+  end
+
+  test "should show product" do
+    get product_url(@product)
+    assert_response :success
+  end
+
+  test "should get edit" do
+    get edit_product_url(@product)
+    assert_response :success
+  end
+
+  test "should update product" do
+    patch product_url(@product), params: { product: { description: @product.description, image_url: @product.image_url, price: @product.price, title: @product.title } }
+    assert_redirected_to product_url(@product)
+  end
+
+  test "should destroy product" do
+    assert_difference('Product.count', -1) do
+      delete product_url(@product)
+    end
+
+    assert_redirected_to products_url
+  end
+end

test/fixtures/products.yml

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+# Read about fixtures at http://api.rubyonrails.org/classes/ActiveRecord/FixtureSet.html
+
+one:
+  title: MyString
+  description: MyText
+  image_url: MyString
+  price: 9.99
+
+two:
+  title: MyString
+  description: MyText
+  image_url: MyString
+  price: 9.99

test/models/product_test.rb

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+require 'test_helper'
+
+class ProductTest < ActiveSupport::TestCase
+  # test "the truth" do
+  #   assert true
+  # end
+end