app/controllers/store_controller.rb

   1 class StoreController < ApplicationController
   2   def index
   3     @products = Product.find_products_for_sale
   4     @cart = find_cart
   5   end
   6
   7   def add_to_cart
   8     product = Product.find(params[:id])
   9     @cart = find_cart
  10     @current_item = @cart.add_product(product)
  11       respond_to do |format|
  12         format.js
  13       end
  14   rescue ActiveRecord::RecordNotFound
  15     logger.error("Attempt to access invalid product #{params[:id]}" )
  16     redirect_to_index('Invalid product')
  17   end
  18
  19   def empty_cart
  20     session[:cart] = nil
  21     redirect_to_index('Your cart has been emptied')
  22   end
  23
  24  private
  25
  26   def find_cart
  27     session[:cart] ||= Cart.new
  28   end
  29
  30   def redirect_to_index(msg = nil)
  31     flash[:notice] = msg if msg
  32     redirect_to :action => 'index'
  33   end
  34
  35 end