bhgames/_cart.html.erb

## _cart.html.erb
<% unless cart.line_items.empty? %>

<div class = "cart_title">Your Cart</div>
<table>
	<%= render(cart.line_items)%>

	<tr class="total_line">
	<td colspan="2">Total</td>
	<td class="total_cell"><%= number_to_currency(cart.total_price) %></td>
	</tr>

</table>
<%= button_to 'Empty cart', cart, :method => :delete,
:confirm => 'Are you sure?' %>
<%end%>

## application.html.erb
<!DOCTYPE html>
<html>
<head>
  <title> Pragprog Books Online Store</title>
  <%= stylesheet_link_tag "scaffold" %>
  <%= stylesheet_link_tag "depot", :media => "all"%>
  <%javascript_include_tag :defaults %>
  <% csrf_meta_tag %>

</head>
<body id = "store">
	<div id="banner">
		<%= image_tag("logo.png") %>
		<%= @page_title || "Pragmatic Bookshelf" %>
	</div>
	<div id="columns">
		<div id ="side">
			<div id="cart">
				<%= render @cart%>
			</div>
			<%=@time%><br />
			<a href = "http://www....">Home</a><br />
			<a href = "http://www....">Questions</a><br />
			<a href = "http://www....">News</a><br />
			<a href = "http://www....">Contact</a><br />
		</div>
	<div id ="main">
		<%= yield %>
	</div>
	</div>
</body>
</html>

## create.js.rjs
page.replace_html('cart',render(@cart))
page[:cart].visual_effect :blind_down if @cart.total_items==1
page[:current_item].visual_effect :highlight,
:startcolor => "#88ff88",
:endcolor => "#114411"

## line_items_controller.rb
class LineItemsController < ApplicationController
  # GET /line_items
  # GET /line_items.xml
  def index
    @line_items = LineItem.all

    respond_to do |format|
      format.html # index.html.erb
      format.xml  { render :xml => @line_items }
    end
  end

  # GET /line_items/1
  # GET /line_items/1.xml
  def show
    @line_item = LineItem.find(params[:id])

    respond_to do |format|
      format.html # show.html.erb
      format.xml  { render :xml => @line_item }
    end
  end

  # GET /line_items/new
  # GET /line_items/new.xml
  def new
    @line_item = LineItem.new

    respond_to do |format|
      format.html # new.html.erb
      format.xml  { render :xml => @line_item }
    end
  end

  # GET /line_items/1/edit
  def edit
    @line_item = LineItem.find(params[:id])
  end

  # POST /line_items
  # POST /line_items.xml
  def create
    @cart = find_or_create_cart
    session[:counter]=0
    product = Product.find(params[:product_id])
    @line_item = @cart.add_product(product.id)


    respond_to do |format|
      if @line_item.save #redirect to sends you to cart page, not line_item again!
        format.html { redirect_to(store_url) }
        format.js { @current_item = @line_item }
        format.xml  { render :xml => @line_item, :status => :created, :location => @line_item }
      else
        format.html { render :action => "new" }
        format.xml  { render :xml => @line_item.errors, :status => :unprocessable_entity }
      end
    end
  end

  # PUT /line_items/1
  # PUT /line_items/1.xml
  def update
    @line_item = LineItem.find(params[:id])

    respond_to do |format|
      if @line_item.update_attributes(params[:line_item])
        format.html { redirect_to(@line_item, :notice => 'Line item was successfully updated.') }
        format.xml  { head :ok }
      else
        format.html { render :action => "edit" }
        format.xml  { render :xml => @line_item.errors, :status => :unprocessable_entity }
      end
    end
  end

  # DELETE /line_items/1
  # DELETE /line_items/1.xml
  def destroy
    @line_item = LineItem.find(params[:id])
    @line_item.destroy

    respond_to do |format|
      format.html { redirect_to(@line_item.cart, :notice => 'Line item was successfully deleted.') }
      format.xml  { head :ok }
    end
  end
end
	<% unless cart.line_items.empty? %>

	<div class = "cart_title">Your Cart</div>
	<table>
	<%= render(cart.line_items)%>

	<tr class="total_line">
	<td colspan="2">Total</td>
	<td class="total_cell"><%= number_to_currency(cart.total_price) %></td>
	</tr>

	</table>
	<%= button_to 'Empty cart', cart, :method => :delete,
	:confirm => 'Are you sure?' %>
	<%end%>
	<!DOCTYPE html>
	<html>
	<head>
	<title> Pragprog Books Online Store</title>
	<%= stylesheet_link_tag "scaffold" %>
	<%= stylesheet_link_tag "depot", :media => "all"%>
	<%javascript_include_tag :defaults %>
	<% csrf_meta_tag %>

	</head>
	<body id = "store">
	<div id="banner">
	<%= image_tag("logo.png") %>
	<%= @page_title \|\| "Pragmatic Bookshelf" %>
	</div>
	<div id="columns">
	<div id ="side">
	<div id="cart">
	<%= render @cart%>
	</div>
	<%=@time%><br />
	<a href = "http://www....">Home</a><br />
	<a href = "http://www....">Questions</a><br />
	<a href = "http://www....">News</a><br />
	<a href = "http://www....">Contact</a><br />
	</div>
	<div id ="main">
	<%= yield %>
	</div>
	</div>
	</body>
	</html>
	page.replace_html('cart',render(@cart))
	page[:cart].visual_effect :blind_down if @cart.total_items==1
	page[:current_item].visual_effect :highlight,
	:startcolor => "#88ff88",
	:endcolor => "#114411"
	class LineItemsController < ApplicationController
	# GET /line_items
	# GET /line_items.xml
	def index
	@line_items = LineItem.all

	respond_to do \|format\|
	format.html # index.html.erb
	format.xml { render :xml => @line_items }
	end
	end

	# GET /line_items/1
	# GET /line_items/1.xml
	def show
	@line_item = LineItem.find(params[:id])

	respond_to do \|format\|
	format.html # show.html.erb
	format.xml { render :xml => @line_item }
	end
	end

	# GET /line_items/new
	# GET /line_items/new.xml
	def new
	@line_item = LineItem.new

	respond_to do \|format\|
	format.html # new.html.erb
	format.xml { render :xml => @line_item }
	end
	end

	# GET /line_items/1/edit
	def edit
	@line_item = LineItem.find(params[:id])
	end

	# POST /line_items
	# POST /line_items.xml
	def create
	@cart = find_or_create_cart
	session[:counter]=0
	product = Product.find(params[:product_id])
	@line_item = @cart.add_product(product.id)


	respond_to do \|format\|
	if @line_item.save #redirect to sends you to cart page, not line_item again!
	format.html { redirect_to(store_url) }
	format.js { @current_item = @line_item }
	format.xml { render :xml => @line_item, :status => :created, :location => @line_item }
	else
	format.html { render :action => "new" }
	format.xml { render :xml => @line_item.errors, :status => :unprocessable_entity }
	end
	end
	end

	# PUT /line_items/1
	# PUT /line_items/1.xml
	def update
	@line_item = LineItem.find(params[:id])

	respond_to do \|format\|
	if @line_item.update_attributes(params[:line_item])
	format.html { redirect_to(@line_item, :notice => 'Line item was successfully updated.') }
	format.xml { head :ok }
	else
	format.html { render :action => "edit" }
	format.xml { render :xml => @line_item.errors, :status => :unprocessable_entity }
	end
	end
	end

	# DELETE /line_items/1
	# DELETE /line_items/1.xml
	def destroy
	@line_item = LineItem.find(params[:id])
	@line_item.destroy

	respond_to do \|format\|
	format.html { redirect_to(@line_item.cart, :notice => 'Line item was successfully deleted.') }
	format.xml { head :ok }
	end
	end
	end