app/controllers/store_controller.rb

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