Ajax functionality for shopping cart added

Gemfile

@@ -21,6 +21,7 @@ gem 'coffee-rails', '~> 4.0.0'
 # Use jquery as the JavaScript library
 gem 'jquery-rails'
 
+
 # Turbolinks makes following links in your web application faster. Read more: https://github.com/rails/turbolinks
 gem 'turbolinks'
 

app/assets/javascripts/cart.js

@@ -0,0 +1,23 @@
+/**
+ * Created with JetBrains RubyMine.
+ * User: shaleenchugh
+ * Date: 22/11/13
+ * Time: 22:24
+ * To change this template use File | Settings | File Templates.
+ */
+$(document).ready(function () {
+    $.ajax({
+        url: "/carts/show",
+        async: true,
+        contentType: "application/json",
+        success: function(data) {
+            var rows = data;
+            if (rows && rows !== undefined){
+                $('#shopping_cart').append('<tr><td>Product name</td><td>quantity</td><td>Price</td></tr>');
+                for (var i=0;i< rows.length;i++){
+                    $('#shopping_cart').append('<tr><td>'+ rows[i].product_id +'</td><td>'+ rows[i].quantity +'</td><td>£'+ rows[i].unit_price +'</td></tr>');
+                }
+            }
+        }
+    })
+});

app/controllers/carts_controller.rb

@@ -4,12 +4,28 @@ def new
 
   end
 
+  def add
+    #if !Cart.find_by(:session_id => session[:session_id])
+      product = Product.find_by(:id => params[:product][:id])
+      product_price = product.get_product_price.first
+      Cart.create!(:session_id => session[:session_id], :product_id => params[:product][:id], :quantity => params[:product][:quantity], :unit_price => product_price[:price])
+
+
+      #render json: @cart
+      #redirect_to products_path(@cart, format: :json)
+    #  return
+    #end
+    redirect_to products_path
+
+  end
+
   def index
 
   end
 
   def show
-
+   @cart =  Cart.where(:session_id => session[:session_id])
+   render json: @cart
   end
 
   def create

app/models/product.rb

@@ -1,6 +1,10 @@
 class Product < ActiveRecord::Base
   belongs_to :category
-
+  has_many :product_prices
   validates :category_id, :presence => true
 
+  def get_product_price
+    product_prices.where("effective_start_date >= ?", Date.today)
+  end
+
 end

app/models/product_price.rb

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

app/views/products/index.html.erb

@@ -1,6 +1,14 @@
 TEST PRODUCTS
+<div id="cart">
+  <table id="shopping_cart"></table>
+</div>
+
 <%@products.each do |product|%>
+    <%=form_tag('/carts/add', method: "post") do%>
    <h1><%=product.category.name%></h1>
         <h2><%=product.name%></h2>
-        <div>Quanity to buy <%=text_field_tag("#{product.id}")%></div>
+        <%= hidden_field(:product,:id, :value => product.id)%>
+        <div>Quanity to buy <%=text_field(:product, :quantity)%></div>
+    <%= submit_tag("Add to Cart") %>
+<% end %>
 <%end%>

config/routes.rb

@@ -12,7 +12,11 @@
   #   get 'products/:id/purchase' => 'catalog#purchase', as: :purchase
 
   # Example resource route (maps HTTP verbs to controller actions automatically):
+
+  post 'carts/add' => 'carts#add'
+
   resources :carts do
+
     resources :products
   end
 

db/migrate/20131122205931_product_prices.rb

@@ -0,0 +1,9 @@
+class ProductPrices < ActiveRecord::Migration
+  def change
+    create_table :product_prices do |t|
+      t.integer :product_id
+      t.decimal :price
+      t.datetime :effective_start_date
+    end
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20131120212846) do
+ActiveRecord::Schema.define(version: 20131122205931) do
 
   create_table "carts", force: true do |t|
     t.string   "session_id"
@@ -36,6 +36,12 @@
     t.datetime "updated_at"
   end
 
+  create_table "product_prices", force: true do |t|
+    t.integer  "product_id"
+    t.decimal  "price",                precision: 10, scale: 0
+    t.datetime "effective_start_date"
+  end
+
   create_table "products", force: true do |t|
     t.string   "name"
     t.text     "description"