Basic done

Gemfile

@@ -56,6 +56,7 @@ gem 'vacuum'
 gem "breadcrumbs_on_rails"
 gem "breadcrumbs_on_rails"
 gem 'momentjs-rails', '>= 2.8.1'
 gem 'momentjs-rails', '>= 2.8.1'
 gem 'bootstrap3-datetimepicker-rails', '~> 4.7.14'
 gem 'bootstrap3-datetimepicker-rails', '~> 4.7.14'
+gem 'draper', '~> 1.3'
 group :test do
 group :test do
   # gem 'capybara'  # Integration test tool to simulate a user on a website.
   # gem 'capybara'  # Integration test tool to simulate a user on a website.
   # gem 'capybara_minitest_spec'  # MiniTest::Spec expectations for Capybara node matchers.
   # gem 'capybara_minitest_spec'  # MiniTest::Spec expectations for Capybara node matchers.

Gemfile.lock

@@ -76,6 +76,11 @@ GEM
       addressable (~> 2.3)
       addressable (~> 2.3)
       multi_json (~> 1.0)
       multi_json (~> 1.0)
       rack (>= 1.3.0)
       rack (>= 1.3.0)
+    draper (1.4.0)
+      actionpack (>= 3.0)
+      activemodel (>= 3.0)
+      activesupport (>= 3.0)
+      request_store (~> 1.0)
     email_spec (1.6.0)
     email_spec (1.6.0)
       launchy (~> 2.1)
       launchy (~> 2.1)
       mail (~> 2.2)
       mail (~> 2.2)
@@ -156,6 +161,7 @@ GEM
       thor (>= 0.18.1, < 2.0)
       thor (>= 0.18.1, < 2.0)
     rake (10.4.2)
     rake (10.4.2)
     rdoc (4.2.0)
     rdoc (4.2.0)
+    request_store (1.1.0)
     responders (2.1.0)
     responders (2.1.0)
       railties (>= 4.2.0, < 5)
       railties (>= 4.2.0, < 5)
     rspec (3.0.0)
     rspec (3.0.0)
@@ -236,6 +242,7 @@ DEPENDENCIES
   database_cleaner
   database_cleaner
   devise (~> 3.4.1)
   devise (~> 3.4.1)
   dragonfly
   dragonfly
+  draper (~> 1.3)
   email_spec
   email_spec
   factory_girl_rails (~> 4.4.1)
   factory_girl_rails (~> 4.4.1)
   faker
   faker

app/assets/javascripts/application.js

@@ -14,5 +14,6 @@
 //= require jquery_ujs
 //= require jquery_ujs
 //= require turbolinks
 //= require turbolinks
 //= require moment
 //= require moment
+//= require bootstrap-sprockets
 //= require bootstrap-datetimepicker
 //= require bootstrap-datetimepicker
 //= require_tree ./components
 //= require_tree ./components

app/assets/javascripts/components/cart.js

+var EditCart = {
+    init: function($el){
+
+      this.el = $el;
+      if(this.el.size() > 0){
+        this.initChangeQuantity();
+      }
+    },
+    initChangeQuantity: function(){
+      var $this = this;
+      this.el.find(".item-quantity").on("change", function(e){
+        var $target = $(e.target);
+        var price = parseFloat($target.parents("tr").first().find(".item-price").text());
+        $target.parents("tr").first().find(".item-total").text( ($target.val() * price).toFixed(2) );
+        $this.changeTotalCart();
+      });
+    },
+    changeTotalCart: function(){
+      var sum = 0;
+      this.el.find('.item-total').each(function() {
+        sum += parseFloat($(this).text());
+      });
+      this.el.find(".total-cart").text(sum.toFixed(2));
+    }
+};
+
+$(document).on('ready page:load', function(){
+  EditCart.init($('#edit-cart'));
+});
\ No newline at end of file

app/assets/javascripts/components/libs.js

+$(document).on('ready page:load', function(){
+  $('.datetimepicker').datetimepicker();
+});

app/assets/javascripts/components/libs.js.coffee

-$(document).on 'ready page:load', ->
-  $('.datetimepicker').datetimepicker()
\ No newline at end of file

app/assets/stylesheets/bootstrap_override.css.scss

@@ -532,9 +532,17 @@ img {
   position: absolute;
   position: absolute;
 }
 }
 //***********************************************************
 //***********************************************************
+.btn{
+  padding: 8px 12px;
+}
 
 
-
+table{
+  th, td{
+    vertical-align: middle!important;
+  }
+}
 //***********************************************************
 //***********************************************************
+
 // FOOTER
 // FOOTER
 #footer {
 #footer {
   background-color: #222222;
   background-color: #222222;

app/assets/stylesheets/components/layout.css.scss

@@ -20,7 +20,8 @@
 
 
 #search-bar{
 #search-bar{
   margin: 20px 0;
   margin: 20px 0;
-  input[type="text"]{
-    height: 35px;
-  }
+}
+
+img{
+  display: inline-block;
 }
 }
\ No newline at end of file

app/assets/stylesheets/components/products.css.scss

-.recommend{
-
+.recommends{
+  margin-bottom: 20px;
 }
 }
 
 
 .products{
 .products{
@@ -9,4 +9,19 @@
   .title{
   .title{
     padding-left: 60px;
     padding-left: 60px;
   }
   }
+}
+
+#product{
+  img{
+    float: left;
+  }
+  .content{
+    padding-left: 126px;
+  }
+  p{
+    margin-bottom: 6px;
+  }
+  .desc{
+    clear: both;
+  }
 }
 }
\ No newline at end of file

app/assets/stylesheets/components/style.css.scss

@@ -14,6 +14,10 @@
   text-align: center!important;
   text-align: center!important;
 }
 }
 
 
+.text-right{
+  text-align: right!important;
+}
+
 .mar-0{
 .mar-0{
   margin: 0!important;
   margin: 0!important;
 }
 }
@@ -22,4 +26,8 @@
 }
 }
 .mar-l-0{
 .mar-l-0{
   margin-left: 0!important;
   margin-left: 0!important;
+}
+
+.w-100{
+  width: 100px!important;
 }
 }
\ No newline at end of file

app/controllers/application_controller.rb

@@ -4,7 +4,9 @@ class ApplicationController < ActionController::Base
   protect_from_forgery with: :exception
   protect_from_forgery with: :exception
   layout :detect_layout
   layout :detect_layout
 
 
-  before_filter :configure_permitted_parameters, if: :devise_controller?
+  before_action :configure_permitted_parameters, if: :devise_controller?
+
+  include OrderHelper
 
 
   def get_categories
   def get_categories
     @categories = Category.all
     @categories = Category.all
@@ -22,4 +24,5 @@ class ApplicationController < ActionController::Base
     devise_parameter_sanitizer.for(:sign_up).push(:name)
     devise_parameter_sanitizer.for(:sign_up).push(:name)
     devise_parameter_sanitizer.for(:account_update).push(:name)
     devise_parameter_sanitizer.for(:account_update).push(:name)
   end
   end
+
 end
 end

app/controllers/categories_controller.rb

 class CategoriesController < ApplicationController
 class CategoriesController < ApplicationController
-  before_filter :get_categories
+  before_action :get_categories
 
 
-  def show
-    params[:per_page] ||= 5
-    params[:page] ||= 1
+  add_breadcrumb "Home", :root_path
 
 
+  def show
     @category = Category.find(params[:id])
     @category = Category.find(params[:id])
-    @products = @category.products.page(params[:page]).per(params[:per_page])
+    @products = @category.products.page(params[:page])
+
+    add_breadcrumb @category.name
   end
   end
 end
 end
\ No newline at end of file

app/controllers/home_controller.rb

 class HomeController < ApplicationController
 class HomeController < ApplicationController
   add_breadcrumb "Home", :root_path
   add_breadcrumb "Home", :root_path
 
 
-  before_filter :get_categories
-  before_filter :get_recommend
+  before_action :authenticate_user!, only: [:cart]
+  before_action :get_categories
+  before_action :get_recommend
 
 
   def index
   def index
     params[:per_page] ||= 5
     params[:per_page] ||= 5
@@ -15,6 +16,10 @@ class HomeController < ApplicationController
     @products = Product.search(params)
     @products = Product.search(params)
   end
   end
 
 
+  def cart
+  end
+
+
   private
   private
   def get_recommend
   def get_recommend
     @recommend_products = Product.recommend
     @recommend_products = Product.recommend

app/controllers/orders_controller.rb

+class OrdersController < ApplicationController
+  before_action :authenticate_user!
+  layout "cart"
+
+  def edit
+  end
+
+  def update
+    current_order.update_attributes(update_order_params)
+    redirect_to edit_order_path(current_order), notice: "Update cart successfully"
+  end
+
+  def add_to_cart
+    state = CartService.add_product(current_order, params)
+    if state[0] == true
+      flash[:notice] = state[1]
+    else
+      flash[:error] = state[1]
+    end
+    redirect_to product_path(params[:product_id])
+  end
+
+  def show
+    @order = current_user.orders.find_by_id(params[:id])
+    redirect_to root_path if @order.blank?
+  end
+
+  def checkout
+    order_id = current_order.id
+    state = CartService.checkout(current_order)
+    if state[0] == true
+      redirect_to order_path(order_id), notice: state[1]
+    else
+      redirect_to root_path(order_id), error: state[1]
+    end
+  end
+
+
+  private
+  def update_order_params
+    params.require(:order).permit(line_items_attributes:[:id, :quantity])
+  end
+end

app/controllers/products_controller.rb

 class ProductsController < ApplicationController
 class ProductsController < ApplicationController
-  before_filter :get_categories
+  before_action :get_categories
+
+  add_breadcrumb "Home", :root_path
+
   def show
   def show
     @product = Product.find(params[:id])
     @product = Product.find(params[:id])
+    add_breadcrumb @product.category.try(:name), category_path(@product.category.try(:id))
+    add_breadcrumb @product.title
   end
   end
 
 
   def new
   def new

app/decorators/user_decorator.rb

+class UserDecorator < Draper::Decorator
+  include Draper::LazyHelpers
+
+  def edit_profile_link
+    h.content_tag(:a, object.name || object.email, href: edit_user_registration_path)
+  end
+end
\ No newline at end of file

app/helpers/order_helper.rb

+module OrderHelper
+  def current_order
+    if current_user.present?
+      current_user.orders.where(state: Order.states[:cart]).first_or_create
+    else
+      nil
+    end
+  end
+end
+
+

app/mailers/user_mailer.rb

+class UserMailer < ActionMailer::Base
+  default from: ENV["default_send_mail"]
+  add_template_helper(ApplicationHelper)
+
+  def success_checkout(current_order)
+    @user = current_order.user
+    @order = current_order
+
+    mail to: @user.email, subject: "Venshop! Checkout successfully"
+  end
+end

app/models/line_item.rb

+class LineItem < ActiveRecord::Base
+  belongs_to :order
+  belongs_to :product
+
+  validate :check_product_stock
+  after_save :trigger_recalculate
+  before_destroy :trigger_calculate_order
+
+  def trigger_recalculate
+    order.recalculate
+    change_square = quantity - quantity_was
+    product.substract_stock(change_square)
+  end
+
+  def check_product_stock
+    change_square = quantity - quantity_was
+    if change_square > product.stock
+      self.errors.add(:quantity, "Product #{product.title} is not enough in stock")
+      return false
+    end
+  end
+end

app/models/order.rb

+class Order < ActiveRecord::Base
+  enum state: [:card, :checkout]
+
+  has_many :line_items, dependent: :destroy
+  belongs_to :user
+
+  accepts_nested_attributes_for :line_items
+
+  def recalculate
+    count = line_items.sum(:quantity)
+    total_price = 0
+    line_items.each do |item|
+      total_price += item.quantity*item.price
+    end
+    self.update_columns(item_count: count, item_total: total_price)
+  end
+
+  def checkout
+    pid = generate_token
+    self.update_columns(state: Order.states[:checkout], pid: pid)
+  end
+
+  private
+  def generate_token
+    loop do
+      random_token = SecureRandom.urlsafe_base64(nil, false)
+      break random_token unless Order.exists?(pid: random_token)
+    end
+  end
+end

app/models/product.rb

@@ -6,15 +6,23 @@ class Product < ActiveRecord::Base
     # default 'public/images/product_default.jpg'
     # default 'public/images/product_default.jpg'
   end
   end
 
 
+  paginates_per 5
+
   validates :pid, :title, :price, :category_id, :image, :stock, :release_date, :public_date, presence: true
   validates :pid, :title, :price, :category_id, :image, :stock, :release_date, :public_date, presence: true
   validates :pid, uniqueness: true
   validates :pid, uniqueness: true
 
 
-  scope :recommend, -> {where(recommend: true)}
+  scope :recommend, -> { where(recommend: true) }
 
 
   def self.search(params)
   def self.search(params)
-    params[:per_page] ||= 5
-    params[:page] ||= 1
+    Product.order("release_date DESC").page(params[:page])
+  end
+
+
+  def can_buy?(quantity)
+    stock >= quantity.to_i
+  end
 
 
-    Product.order("release_date DESC").page(params[:page]).per(params[:per_page])
+  def substract_stock(change)
+    self.update_columns(stock: stock - change)
   end
   end
 end
 end

app/models/user.rb

@@ -5,6 +5,7 @@ class User < ActiveRecord::Base
         :recoverable, :rememberable, :trackable, :validatable
         :recoverable, :rememberable, :trackable, :validatable
 
 
   has_many :products
   has_many :products
+  has_many :orders, dependent: :destroy
 
 
   validates :name, presence: true
   validates :name, presence: true
 end
 end

app/services/cart_service.rb

+class CartService
+
+  def self.add_product(current_order, params)
+    params[:quantity] ||= 1
+    product = Product.find(params[:product_id])
+    if product.can_buy?(params[:quantity])
+      line_item = current_order.line_items.where(product_id: product.id).first_or_create
+      line_item.quantity += params[:quantity].to_i
+      line_item.price = product.price
+      if line_item.save
+        return true, "Add to cart successfully"
+      else
+        return false, "Something went wrong"
+      end
+    else
+      return false, "Product is not enough in stock"
+    end
+  end
+
+  def self.checkout(current_order)
+    if current_order.line_items.blank?
+      return false, "Your cart is empty."
+    else
+      current_order.checkout
+      UserMailer.success_checkout(current_order).deliver
+      return true, "Checkout successfully"
+    end
+  end
+
+  def self.update_cart(current_order, params)
+
+    if current_order.update_attributes(params)
+      return true, "Update cart successfully"
+    else
+      return false, "Something went wrong"
+    end
+  end
+end
\ No newline at end of file

app/views/categories/show.html.slim

 #categories
 #categories
   - if @products.present?
   - if @products.present?
     .products
     .products
-      - @products.each do |product|
-        = render "products/item", product: product
+      = render partial: "products/item", collection: @products, as: :product
 
 
   .text-center
   .text-center
     = paginate @products
     = paginate @products
\ No newline at end of file

app/views/home/index.html.slim

 - if @recommend_products.present?
 - if @recommend_products.present?
+  h3 Recommend Products
   .row.recommends
   .row.recommends
-    - @recommend_products.each do |product|
-      = render "products/recommend_item", product: product
+    = render partial: "products/recommend_item", collection: @recommend_products, as: :product
+  hr
 
 
 - if @products.present?
 - if @products.present?
   .products
   .products
-    - @products.each do |product|
-      = render "products/item", product: product
+    h3 Products
+    = render partial: "products/item", collection: @products, as: :product
 
 
 .text-center
 .text-center
   = paginate @products
   = paginate @products
\ No newline at end of file

app/views/home/search.html.slim

 - if @products.present?
 - if @products.present?
   .products
   .products
-    - @products.each do |product|
-      = render "products/item", product: product
+    = render partial: "products/item", collection: @products, as: :product
 
 
 .text-center
 .text-center
   = paginate @products
   = paginate @products
\ No newline at end of file

app/views/layouts/_navigation.html.slim

@@ -18,7 +18,9 @@ nav.navbar.navbar-inverse
       ul.nav.navbar-nav.navbar-right
       ul.nav.navbar-nav.navbar-right
         - if current_user.present?
         - if current_user.present?
           li
           li
-            = link_to (current_user.name || current_user.email), edit_user_registration_path
+            = link_to "Cart (#{current_order.item_count})", edit_order_path(current_order)
+          li
+            = current_user.decorate.edit_profile_link
           li
           li
             = link_to "Logout", destroy_user_session_path, method: 'delete'
             = link_to "Logout", destroy_user_session_path, method: 'delete'
         - else
         - else

app/views/layouts/cart.html.slim

+doctype html
+html
+  head
+    meta[name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no"]
+    title
+      = @title || "Venshop"
+    = favicon_link_tag 'favicon.ico'
+    = favicon_link_tag 'apple-touch-icon.png', rel: 'apple-touch-icon', type: 'image/png'
+    = stylesheet_link_tag "application", media: "all", "data-turbolinks-track" => true
+    = javascript_include_tag "application", "data-turbolinks-track" => true
+    = csrf_meta_tags
+  body
+    #wrap
+      header
+        = render 'layouts/navigation'
+      .container
+        .row
+          .col-sm-12.text-center
+            = render 'shared/messages'
+
+        = render 'shared/search_bar'
+        = render_breadcrumbs :separator => ' / '
+        .row.mar-top-20
+          .col-sm-12
+            = yield
+      .clearfix
+    = render 'layouts/footer'

app/views/layouts/devise.html.slim

@@ -14,6 +14,12 @@ html
       header
       header
         = render 'layouts/navigation'
         = render 'layouts/navigation'
       .container
       .container
+        .row
+          .col-sm-12.text-center
+            = render 'shared/messages'
+
+        = render 'shared/search_bar'
+        = render_breadcrumbs :separator => ' / '
         .row.mar-top-20
         .row.mar-top-20
           .col-sm-12
           .col-sm-12
             = yield
             = yield

app/views/orders/edit.html.slim

+#edit-cart
+  - if current_order.line_items.blank?
+    .text-center
+      'You cart is empty.
+      = link_to "Continue shopping", root_path
+  - else
+    = form_for current_order, html:{ class: "form-horizontal" } do |f|
+      #error_explanation
+        - current_order.line_items.each do |i|
+          - if i.errors.any?
+            ul
+              - i.errors.full_messages.each do |msg|
+                li= msg
+
+
+      .table-responsive
+        table.table
+          thead
+            tr
+              th #
+              th Title
+              th.w-100 Quantity
+              th Price
+              th Total
+              th
+          tbody
+            = f.fields_for :line_items do |i|
+              tr
+                td= i.index+1
+                td= i.object.product.title
+                td= i.number_field :quantity, class: "form-control item-quantity", min: 1
+                td
+                  span.item-price= i.object.price
+                  span= i.object.product.currency
+                td
+                  span.item-total= i.object.price * i.object.quantity
+                  span= i.object.product.currency
+                td
+
+            tr
+              td(colspan=4)
+              td
+                b
+                  span.total-cart= current_order.item_total
+                  span= current_order.line_items.first.try(:product).try(:currency)
+              td
+                = f.submit "Update Cart", class: "btn btn-primary"
+            tr
+              td(colspan=5)
+              td
+
+    .text-center
+      = link_to "Checkout", checkout_orders_path, class: "btn btn-success btn-lg"
+      br
+      i
+        '(You must update change before checkout cart)
\ No newline at end of file

app/views/orders/show.html.slim

+#order
+  h1= "Order ##{@order.pid}"
+  .table-responsive
+    table.table
+      thead
+        tr
+          th #
+          th Title
+          th.w-100 Quantity
+          th Price
+          th Total
+      tbody
+        - @order.line_items.each_with_index do |item, index|
+          tr
+            td= index+1
+            td= item.product.title
+            td= item.quantity
+            td= currency_number(item.price, item.product.currency)
+            td= currency_number(item.price * item.quantity, item.product.currency)
+
+        tr
+          td(colspan=4)
+          td
+            b
+              'Total:
+              = currency_number(@order.item_total, @order.line_items.first.try(:product).try(:currency))
+        tr
+          td(colspan=5)
+          td
\ No newline at end of file

app/views/products/_recommend_item.html.slim

-.col-sm-4
-  h4= product.title
-  = image_tag product.image.thumb('71x38>')
+.col-sm-4.text-center
+  = link_to product.title, product_path(product)
+  br
\ No newline at end of file
+  = image_tag product.image.thumb('71x38>').url
\ No newline at end of file

app/views/products/show.html.slim

+#product
+  h4= @product.title
+  = image_tag @product.image.thumb("110x86#").url
+  .content
+    p= "Item ID: #{@product.pid}"
+    p= "Price #{currency_number(@product.price, @product.currency)}"
+    p= "Release Date: #{@product.release_date.strftime('%d/%m/%Y')}"
+    p= "Public Date: #{@product.public_date.strftime('%d/%m/%Y')}"
+    p= "Author: #{@product.author}"
+    p= "Publisher: #{@product.publisher}"
+    p= "Studio: #{@product.studio}"
+    p= "Stock: #{@product.stock}"
+    = form_tag add_to_cart_orders_path, class: "form-inline" do |f|
+      .form-group
+        = number_field_tag :quantity, 1, class: "form-control"
+        = hidden_field_tag :product_id, @product.id
+        = submit_tag "Add to cart", class: "btn btn-primary"
+

app/views/shared/_messages.html.slim

+- flash.each do |name, msg|
+  - if msg.is_a?(String)
+    .alert(class="alert-#{name == 'notice' ? 'success' : 'danger'}")
+      button.close(data-dismiss="alert" aria-hidden="true")×
+      = content_tag :div, msg, :id => "flash_#{name}"

app/views/user_mailer/success_checkout.html.slim

+h3 Congratulation!!! You have checkout successfully.
+b= "Your order pid: ##{@order.pid}"
+.table-responsive
+  table.table
+    thead
+      tr
+        th #
+        th Title
+        th.w-100 Quantity
+        th Price
+        th Total
+    tbody
+      - @order.line_items.each_with_index do |item, index|
+        tr
+          td= index+1
+          td= item.product.title
+          td= item.quantity
+          td= currency_number(item.price, item.product.currency)
+          td= currency_number(item.price * item.quantity, item.product.currency)
+
+      tr
+        td(colspan=4)
+        td
+          b
+            'Total:
+            = currency_number(@order.item_total, @order.line_items.first.try(:product).try(:currency))
+      tr
+        td(colspan=5)
+        td
\ No newline at end of file

config/application.yml

 aws_access_key_id: "AKIAJ77C4CTZOP7TUVWQ"
 aws_access_key_id: "AKIAJ77C4CTZOP7TUVWQ"
 aws_secret_access_key: "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"
 aws_secret_access_key: "cYJYb/MLGV0M6oi1+DjlliL1cfxmh78tKXnT6ZmX"
 associate_tag: "zigexn6400-22"
 associate_tag: "zigexn6400-22"
+
+default_send_mail: "no-reply@venshop.com"
\ No newline at end of file

config/environments/development.rb

@@ -38,4 +38,14 @@ Rails.application.configure do
 
 
   # Raises error for missing translations
   # Raises error for missing translations
   # config.action_view.raise_on_missing_translations = true
   # config.action_view.raise_on_missing_translations = true
+  config.action_mailer.default_url_options = { :host => "localhost:3000" }
+  config.action_mailer.delivery_method = :smtp
+  config.action_mailer.smtp_settings = {
+      address:              'smtp.mandrillapp.com',
+      port:                 587,
+      domain:               'localhost:3000',
+      user_name:            'debug.com.ca@gmail.com',
+      password:             'NDGwmV0ahGerm4nFUFPSxA',
+      authentication:       'plain',
+      enable_starttls_auto: true  }
 end
 end

config/routes.rb

@@ -9,7 +9,12 @@ Rails.application.routes.draw do
 
 
   resources :categories, :only => [:show]
   resources :categories, :only => [:show]
   resources :products, :only => [:new, :create, :show]
   resources :products, :only => [:new, :create, :show]
-
+  resources :orders, :only => [:edit, :update, :show] do
+    collection do
+      get "checkout" => "orders#checkout", as: :checkout
+      post "add_to_cart" => "orders#add_to_cart", as: :add_to_cart
+    end
+  end
   # Example of regular route:
   # Example of regular route:
   #   get 'products/:id' => 'catalog#view'
   #   get 'products/:id' => 'catalog#view'
 
 

db/migrate/20150715093526_create_orders.rb

+class CreateOrders < ActiveRecord::Migration
+  def change
+    create_table :orders do |t|
+      t.string :pid
+      t.integer :item_count, default: 0
+      t.float :item_total, default: 0
+      t.integer :state, default: 1
+      t.datetime :completed_at
+      t.integer :user_id
+
+      t.timestamps null: false
+    end
+  end
+end

db/migrate/20150715093529_create_line_items.rb

+class CreateLineItems < ActiveRecord::Migration
+  def change
+    create_table :line_items do |t|
+      t.integer :product_id
+      t.integer :order_id
+      t.integer :quantity, default: 0
+      t.float :price
+    end
+  end
+end

db/schema.rb

@@ -11,12 +11,30 @@
 #
 #
 # It's strongly recommended that you check this file into your version control system.
 # It's strongly recommended that you check this file into your version control system.
 
 
-ActiveRecord::Schema.define(version: 20150715091023) do
+ActiveRecord::Schema.define(version: 20150715093529) do
 
 
   create_table "categories", force: :cascade do |t|
   create_table "categories", force: :cascade do |t|
     t.string "name", limit: 255
     t.string "name", limit: 255
   end
   end
 
 
+  create_table "line_items", force: :cascade do |t|
+    t.integer "product_id", limit: 4
+    t.integer "order_id",   limit: 4
+    t.integer "quantity",   limit: 4,  default: 0
+    t.float   "price",      limit: 24
+  end
+
+  create_table "orders", force: :cascade do |t|
+    t.string   "pid",          limit: 255
+    t.integer  "item_count",   limit: 4,   default: 0
+    t.float    "item_total",   limit: 24,  default: 0.0
+    t.integer  "state",        limit: 4,   default: 1
+    t.datetime "completed_at"
+    t.integer  "user_id",      limit: 4
+    t.datetime "created_at",                             null: false
+    t.datetime "updated_at",                             null: false
+  end
+
   create_table "products", force: :cascade do |t|
   create_table "products", force: :cascade do |t|
     t.string   "pid",          limit: 255
     t.string   "pid",          limit: 255
     t.string   "title",        limit: 1024, default: "",    null: false
     t.string   "title",        limit: 1024, default: "",    null: false

[Nguyen Ngoc Lan]

@dieutb Action này liên quan đến cart mà ở đây là OrdersController. Để phân nhiệm vụ rõ ràng hơn thì nên di chuyển action này sang CartsController chẳng hạn

[Nguyen Ngoc Lan]

@dieutb Nên có 1 dòng trắng phân tách giữa vùng validations và vùng callbacks

[Nguyen Ngoc Lan]

@dieutb Hàm này có được dùng ở bên ngoài ko?

Nếu chỉ dùng bên trong class LineItem thì đặt vào vùng private để cho dễ kiểm soát

[Nguyen Ngoc Lan]

@dieutb Trong ruby có hàm tính tổng là reduce. Dùng hàm này sẽ giảm được 1 biến tạm thời total_price

http://ruby-doc.org/core-2.1.0/Enumerable.html#method-i-reduce

[Nguyen Ngoc Lan]

@dieutb Vì hàm update_columns skip validations và callbacks nên tốt hơn là dùng hàm update. Trừ khi có mục đích là skip

Có nhiều chỗ dùng hàm này

[Truong Ba Dieu]

Yes. My purpose is skip validate and callback here

[Nguyen Ngoc Lan]

@dieutb Có thể dùng kiểu param thay cho string: order(release_date: :desc)

[Nguyen Ngoc Lan]

@dieutb Liệu có thiếu Cart model trong trường hợp này ko?