adding episode 131

episode-131/README

@@ -0,0 +1,3 @@
+Railscasts Episode #131: Going Back
+
+http://railscasts.com/episodes/131

episode-131/store/.gitignore

@@ -0,0 +1,3 @@
+tmp/*
+log/*
+*.sqlite3

episode-131/store/README

@@ -0,0 +1,4 @@
+Railscasts Example Store App
+--
+
+To setup the app, just run `rake setup`.

episode-131/store/Rakefile

@@ -0,0 +1,10 @@
+# Add your own tasks in files placed in lib/tasks ending in .rake,
+# for example lib/tasks/capistrano.rake, and they will automatically be available to Rake.
+
+require(File.join(File.dirname(__FILE__), 'config', 'boot'))
+
+require 'rake'
+require 'rake/testtask'
+require 'rake/rdoctask'
+
+require 'tasks/rails'

episode-131/store/app/controllers/application.rb

@@ -0,0 +1,21 @@
+# Filters added to this controller apply to all controllers in the application.
+# Likewise, all the methods added will be available for all controllers.
+
+class ApplicationController < ActionController::Base
+  helper :all # include all helpers, all the time
+
+  # See ActionController::RequestForgeryProtection for details
+  # Uncomment the :secret if you're not using the cookie session store
+  protect_from_forgery # :secret => '526292d4095d0fd8135a9aa118f5956e'
+
+  # See ActionController::Base for details 
+  # Uncomment this to filter the contents of submitted sensitive data parameters
+  # from your application log (in this case, all fields with names like "password"). 
+  # filter_parameter_logging :password
+
+  private
+
+  def current_cart
+    @current_cart ||= Cart.first || Cart.create!
+  end
+end

episode-131/store/app/controllers/cart_items_controller.rb

@@ -0,0 +1,8 @@
+class CartItemsController < ApplicationController
+  def create
+    current_cart.cart_items.create!(params[:cart_item])
+    flash[:notice] = "Product added to cart"
+    session[:last_product_page] = request.env['HTTP_REFERER'] || products_url
+    redirect_to current_cart_url
+  end
+end

episode-131/store/app/controllers/carts_controller.rb

@@ -0,0 +1,5 @@
+class CartsController < ApplicationController
+  def show
+    @cart = current_cart
+  end
+end

episode-131/store/app/controllers/categories_controller.rb

@@ -0,0 +1,44 @@
+class CategoriesController < ApplicationController
+  def index
+    @categories = Category.find(:all)
+  end
+
+  def show
+    @category = Category.find(params[:id])
+  end
+
+  def new
+    @category = Category.new
+  end
+
+  def create
+    @category = Category.new(params[:category])
+    if @category.save
+      flash[:notice] = "Successfully created category."
+      redirect_to @category
+    else
+      render :action => 'new'
+    end
+  end
+
+  def edit
+    @category = Category.find(params[:id])
+  end
+
+  def update
+    @category = Category.find(params[:id])
+    if @category.update_attributes(params[:category])
+      flash[:notice] = "Successfully updated category."
+      redirect_to @category
+    else
+      render :action => 'edit'
+    end
+  end
+
+  def destroy
+    @category = Category.find(params[:id])
+    @category.destroy
+    flash[:notice] = "Successfully destroyed category."
+    redirect_to categories_url
+  end
+end

episode-131/store/app/controllers/products_controller.rb

@@ -0,0 +1,44 @@
+class ProductsController < ApplicationController
+  def index
+    @products = Product.all(:limit => 10)
+  end
+
+  def show
+    @product = Product.find(params[:id])
+  end
+
+  def new
+    @product = Product.new
+  end
+
+  def create
+    @product = Product.new(params[:product])
+    if @product.save
+      flash[:notice] = "Successfully created product."
+      redirect_to @product
+    else
+      render :action => 'new'
+    end
+  end
+
+  def edit
+    @product = Product.find(params[:id])
+  end
+
+  def update
+    @product = Product.find(params[:id])
+    if @product.update_attributes(params[:product])
+      flash[:notice] = "Successfully updated product."
+      redirect_to @product
+    else
+      render :action => 'edit'
+    end
+  end
+
+  def destroy
+    @product = Product.find(params[:id])
+    @product.destroy
+    flash[:notice] = "Successfully destroyed product."
+    redirect_to products_url
+  end
+end

episode-131/store/app/helpers/application_helper.rb

@@ -0,0 +1,3 @@
+# Methods added to this helper will be available to all templates in the application.
+module ApplicationHelper
+end

episode-131/store/app/helpers/cart_items_helper.rb

@@ -0,0 +1,2 @@
+module CartItemsHelper
+end

episode-131/store/app/helpers/carts_helper.rb

@@ -0,0 +1,2 @@
+module CartsHelper
+end

episode-131/store/app/helpers/categories_helper.rb

@@ -0,0 +1,2 @@
+module CategoriesHelper
+end

episode-131/store/app/helpers/layout_helper.rb

@@ -0,0 +1,23 @@
+# These helper methods can be called in your template to set variables to be used in the layout
+# This module should be included in all views globally,
+# to do so you may need to add this line to your ApplicationController
+#   helper :layout
+module LayoutHelper
+  def title(page_title, show_title = true)
+    @content_for_title = page_title.to_s
+    @show_title = show_title
+  end
+
+  def show_title?
+    @show_title
+  end
+
+  def stylesheet(*args)
+    content_for(:head) { stylesheet_link_tag(*args.map(&:to_s)) }
+  end
+
+  def javascript(*args)
+    args = args.map { |arg| arg == :defaults ? arg : arg.to_s }
+    content_for(:head) { javascript_include_tag(*args) }
+  end
+end

episode-131/store/app/helpers/products_helper.rb

@@ -0,0 +1,2 @@
+module ProductsHelper
+end

episode-131/store/app/models/cart.rb

@@ -0,0 +1,8 @@
+class Cart < ActiveRecord::Base
+  has_many :cart_items
+  has_many :products, :through => :cart_items
+
+  def total_price
+    cart_items.to_a.sum(&:full_price)
+  end
+end

episode-131/store/app/models/cart_item.rb

@@ -0,0 +1,20 @@
+class CartItem < ActiveRecord::Base
+  belongs_to :product
+  belongs_to :cart
+
+  before_create :default_quantity_to_one
+
+  def unit_price
+    product.price
+  end
+
+  def full_price
+    unit_price*quantity
+  end
+
+  private
+
+  def default_quantity_to_one
+    self.quantity ||= 1
+  end
+end

episode-131/store/app/models/category.rb

@@ -0,0 +1,3 @@
+class Category < ActiveRecord::Base
+  has_many :products
+end

episode-131/store/app/models/product.rb

@@ -0,0 +1,4 @@
+class Product < ActiveRecord::Base
+  belongs_to :category
+  has_many :cart_items
+end

episode-131/store/app/views/carts/show.html.erb

@@ -0,0 +1,30 @@
+<% title "Cart" %>
+
+<table id="cart_items">
+  <tr>
+    <th>Product</th>
+    <th>Qty</th>
+    <th class="price">Unit Price</th>
+    <th class="price">Full Price</th>
+  </tr>
+  <% for cart_item in @cart.cart_items %>
+    <tr class="<%= cycle :odd, :even %>">
+      <td><%=h cart_item.product.name %></td>
+      <td class="qty"><%= cart_item.quantity %></td>
+      <td class="price"><%= number_to_currency(cart_item.unit_price) %></td>
+      <td class="price"><%= number_to_currency(cart_item.full_price) %></td>
+    </tr>
+  <% end %>
+  <tr>
+    <td class="total price" colspan="4">
+      Total: <%= number_to_currency @cart.total_price %>
+    </td>
+  </tr>
+</table>
+
+<p>
+  <% if session[:last_product_page] %>
+    <%= link_to "Continue Shopping", session[:last_product_page] %> |
+  <% end %>
+  <%= link_to "Checkout" %>
+</p>

episode-131/store/app/views/categories/_form.html.erb

@@ -0,0 +1,7 @@
+<% form_for @category do |f| %>
+  <p>
+    <%= f.label :name %><br />
+    <%= f.text_field :name %>
+  </p>
+  <p><%= f.submit "Submit" %></p>
+<% end %>

episode-131/store/app/views/categories/edit.html.erb

@@ -0,0 +1,8 @@
+<% title "Edit Category" %>
+
+<%= render :partial => 'form' %>
+
+<p>
+  <%= link_to "Show", @category %> |
+  <%= link_to "View All", categories_path %>
+</p>

episode-131/store/app/views/categories/index.html.erb

@@ -0,0 +1,13 @@
+<% title "Categories" %>
+
+<% for category in @categories %>
+  <div class="category">
+    <h3><%= link_to h(category.name), category %></h3>
+    <div class="actions">
+      <%= link_to "Edit", edit_category_path(category) %> |
+      <%= link_to "Destroy", category, :confirm => 'Are you sure?', :method => :delete %>
+    </div>
+  </div>
+<% end %>
+
+<p><%= link_to "New Category", new_category_path %></p>

episode-131/store/app/views/categories/new.html.erb

@@ -0,0 +1,5 @@
+<% title "New Category" %>
+
+<%= render :partial => 'form' %>
+
+<p><%= link_to "Back to List", categories_path %></p>

episode-131/store/app/views/categories/show.html.erb

@@ -0,0 +1,13 @@
+<% title @category.name %>
+
+<ul>
+<% for product in @category.products %>
+  <li><%= link_to h(product.name), product %></li>
+<% end %>
+</ul>
+
+<p>
+  <%= link_to "Edit", edit_category_path(@category) %> |
+  <%= link_to "Destroy", @category, :confirm => 'Are you sure?', :method => :delete %> |
+  <%= link_to "View All", categories_path %>
+</p>

episode-131/store/app/views/layouts/application.html.erb

@@ -0,0 +1,22 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+  <head>
+    <title><%= h(yield(:title) || "Untitled") %></title>
+    <%= stylesheet_link_tag 'application' %>
+    <%= yield(:head) %>
+  </head>
+  <body>
+    <div id="container">
+      <%- flash.each do |name, msg| -%>
+        <%= content_tag :div, msg, :id => "flash_#{name}" %>
+      <%- end -%>
+      
+      <%- if show_title? -%>
+        <h1><%=h yield(:title) %></h1>
+      <%- end -%>
+      
+      <%= yield %>
+    </div>
+  </body>
+</html>

episode-131/store/app/views/products/_form.html.erb

@@ -0,0 +1,19 @@
+<% form_for @product do |f| %>
+  <p>
+    <%= f.label :category_id %><br />
+    <%= f.collection_select :category_id, Category.all, :id, :name %>
+  </p>
+  <p>
+    <%= f.label :name %><br />
+    <%= f.text_field :name %>
+  </p>
+  <p>
+    <%= f.label :price %><br />
+    <%= f.text_field :price %>
+  </p>
+  <p>
+    <%= f.label :description %><br />
+    <%= f.text_area :description %>
+  </p>
+  <p><%= f.submit "Submit" %></p>
+<% end %>

episode-131/store/app/views/products/edit.html.erb

@@ -0,0 +1,8 @@
+<% title "Edit Product" %>
+
+<%= render :partial => 'form' %>
+
+<p>
+  <%= link_to "Show", @product %> |
+  <%= link_to "View All", products_path %>
+</p>

episode-131/store/app/views/products/index.html.erb

@@ -0,0 +1,15 @@
+<% title "Products" %>
+
+<% for product in @products %>
+  <div class="product">
+    <h3>
+      <%= link_to h(product.name), product %>
+      <%= number_to_currency(product.price) %>
+    </h3>
+    Category: <%=h product.category.name %>
+    <% form_for product.cart_items.build do |f| %>
+      <%= f.hidden_field :product_id %>
+      <%= f.submit "Add to Cart" %>
+    <% end %>
+  </div>
+<% end %>

episode-131/store/app/views/products/new.html.erb

@@ -0,0 +1,5 @@
+<% title "New Product" %>
+
+<%= render :partial => 'form' %>
+
+<p><%= link_to "Back to List", products_path %></p>