Spree - how to add multiple products to cart

问题

I have created a semi-custom Addon function for products. I created a new relationship table in the backend which connects one product to another product (through a checkbox and an ajax request in the backend).

What I am having trouble with is how to manipulate the populate_orders_path so that I can pass various variant/product id's to the cart at the same time.

Currently in my cart form partial I have this:

  <div id="product-addons" class="col-md-6">
    <h3 class="product-section-title">Add Ons</h3>
    <%= image_tag('short-line-2.png', class: 'hundy') %>
    <% addons = Addon.where(product_id: @product.id) %>
    <% addons.each_with_index do |a, index| %>
        <%= a.inspect %>
        <% product_addon = Spree::Product.where(id: a.product_addon_id).first %>
        <% addon_variant = Spree::Variant.where(product_id: a.product_addon_id).first %>
        <% addon_image = Spree::Asset.where(viewable_id: addon_variant.id).first %>
        <div class="col-lg-12">
          <%= image_tag('/spree/products/' + addon_image.id.to_s + '/mini/' + product_addon.images[0].attachment_file_name) %>
          <%= check_box_tag "products[#{a.id}][]", addon_variant.id, index == 0 %>

          <span style="margin-left: 6px;"><%= product_addon.name %></span>
          <br/>
        </div>
    <% end %>
  </div>

But I am not sure what to do with <%= hidden_field_tag "variant_id", @product.master.id %> in order for it to use multiple ID's. Any help would be much appreciated.

回答1:

You can get above functionality by Spree promotion. Configure the item added to cart rule and add another item to cart by action in promotion section.

it will work like this if Variant A is added to cart then Variant B will be added to cart automatically.

来源：https://stackoverflow.com/questions/33202564/spree-how-to-add-multiple-products-to-cart