9.4 Playtime 9.2 Iteration D2: Connecting Products to Carts

Expected at least 1 element matching "input[type=submit][value="Add to Cart"]", found 0.
<0> expected to be
>=
<1>.

Traceback:
  /home/rubys/git/awdwr/edition4/checkdepot.rb:149:in `block in <class:DepotTest>'

Now we connect the model objects we created to the controller and the view.

Add the button, connecting it to the Line Item Controller, passing the product id.

edit app/views/store/index.html.erb

<% if notice %>

<p id="notice"><%= notice %></p>

<% end %>

<h1>Your Pragmatic Catalog</h1>

<% cache ['store', Product.latest] do %>

  <% @products.each do |product| %>

    <% cache ['entry', product] do %>

      <div class="entry">

        <%= image_tag(product.image_url) %>

        <h3><%= product.title %></h3>

        <%= sanitize(product.description) %>

        <div class="price_line">

          <span class="price"><%= number_to_currency(product.price) %></span>

          <%= button_to 'Add to Cart', line_items_path(product_id: product) %>

        </div>

      </div>

    <% end %>

  <% end %>

<% end %>

Add a bit of style to make it show all on one line

edit app/assets/stylesheets/store.css.scss

    p, div.price_line {

      margin-left: 100px;

      margin-top: 0.5em; 

      margin-bottom: 0.8em; 

      form, div {

        display: inline;

      }

    }

See the button on the page

get /

Update the LineItem.new call to use set_cart and the product id. Additionally change the logic so that redirection upon success goes to the cart instead of the line item.

edit app/controllers/line_items_controller.rb

class LineItemsController < ApplicationController

  include CurrentCart

  before_action :set_cart, only: [:create]

  before_action :set_line_item, only: [:show, :edit, :update, :destroy]

  # GET /line_items

  #...

end

edit app/controllers/line_items_controller.rb

  def create

    product = Product.find(params[:product_id])

    @line_item = @cart.line_items.build(product: product)

    respond_to do |format|

      if @line_item.save

        format.html { redirect_to @line_item.cart,

          notice: 'Line item was successfully created.' }

        format.json { render :show,

          status: :created, location: @line_item }

      else

        format.html { render :new }

        format.json { render json: @line_item.errors,

          status: :unprocessable_entity }

      end

    end

  end

Try it once, and see that the output isn't very useful yet.

get /

Update the template that shows the Cart.

edit app/views/carts/show.html.erb

<% if notice %>

<p id="notice"><%= notice %></p>

<% end %>

<h2>Your Pragmatic Cart</h2>

<ul>    

  <% @cart.line_items.each do |item| %>

    <li><%= item.product.title %></li>

  <% end %>

</ul>

Try it once again, and see that the products in the cart.

get /

9.4 Playtime 9.2 Iteration D2: Connecting Products to Carts