创建产品类型

    /**
     * id [String]
     *   Primary key for this product type.
     *
     * label [String]
     *   Label for this product type
     *
     * description [String]
     *   Description for this product.
     *
     * variationType [String] - [DEFAULT = default]
     *   Foreign key for the variation type used.
     *
     * multipleVariations [Bool] - [OPTIONAL, DEFAULTS TO TRUE]
     *   Whether products of this type can have multiple variations.
     *
     * injectVariationFields [Bool] - [OPTIONAL, DEFAULTS TO TRUE]
     *   Whether or not to inject the variation fields.
     */
    // Create the product type.
    $product_type = \Drupal\commerce_product\Entity\ProductType::create([
      'id' => 'my_custom_product_type',
      'label' => "My custom product type",
      'description' => '',
      'variationType' => 'my_custom_variation_type',
      'multipleVariations' => TRUE,
      'injectVariationFields' => TRUE,
    ]);
    $product_type->save();
    // These three functions must be called to add the appropriate fields to the type
    commerce_product_add_variations_field($product_type);
    commerce_product_add_stores_field($product_type);
    commerce_product_add_body_field($product_type);

创建产品变体类型

    /**
     * id [String]
     *   The primary key for this variation type.
     *
     * label [String]
     *   The label for this variation type.
     *
     * status [Bool] - [OPTIONAL, DEFAULTS TO TRUE]
     *   [AVAILABLE = FALSE, TRUE]
     *   Whether or not it's enabled or disabled. 1 for enabled.
     *
     * orderItemType [String] - [DEFAULT = default]
     *   Foreign key for the order item type to use.
     *
     * generateTitle [Bool] - [DEFAULT = TRUE]
     *   Whether or not it should generate the title based off of product label and attributes.
     */
    $variation_type = \Drupal\commerce_product\Entity\ProductVariationType::create([
      'id' => 'my_custom_variation_type',
      'label' => 'Variation Type With Color',
      'status' => TRUE,
      'orderItemType' => 'default',
      'generateTitle' => TRUE,
    ]);
    $variation_type->save();

创建产品属性

    /**
     * id [String]
     *   The primary key for this attribute.
     *
     * label [String]
     *   The label for this attribute.
     */
    $color_attribute = \Drupal\commerce_product\Entity\ProductAttribute::create([
      'id' => 'color',
      'label' => 'Color',
    ]);
    $color_attribute->save();
    $size_attribute = \Drupal\commerce_product\Entity\ProductAttribute::create([
      'id' => 'size',
      'label' => 'Size',
    ]);
    $size_attribute->save();
    // We load a service that adds the attributes to the variation type we made previously.
    $attribute_field_manager = \Drupal::service('commerce_product.attribute_field_manager');
    $attribute_field_manager->createField($color_attribute, 'my_custom_variation_type');
    $attribute_field_manager->createField($size_attribute, 'my_custom_variation_type');

读产品类型

    // Loading is based off of the primary key [String] that was defined when creating it.
    $product_type = \Drupal\commerce_product\Entity\ProductType::load('my_custom_product_type');

读变体类型

    // Loading is based off of the primary key [String] that was defined when creating it.
    $variation_type = \Drupal\commerce_product\Entity\ProductVariationType::load('my_custom_variation_type');

可购买实体

其实，所谓产品变体为什么能够被认定为可购买实体，是因为实现了PurchasableEntityInterface接口。反过来，任何drupal的实体，如果实现了PurchasableEntityInterface，那么它就可以被认定为购买实体。

如果您开发了实现此PurchasableEntityInterface的内容实体类型，则可以设置一个订单项目类型，以允许客户购买您的自定义实体类型，而不是标准产品变体。

      <?php
      namespace Drupal\commerce;
      use Drupal\Core\Entity\ContentEntityInterface;
      /**
       * Defines the interface for purchasable entities.
       *
       * Lives in Drupal\commerce instead of Drupal\commerce_order so that entity
       * type providing modules such as commerce_product don't need to depend
       * on commerce_order.
       */
      interface PurchasableEntityInterface extends ContentEntityInterface {
        /**
         * Gets the stores through which the purchasable entity is sold.
         *
         * @return \Drupal\commerce_store\Entity\StoreInterface[]
         *   The stores.
         */
        public function getStores();
        /**
         * Gets the purchasable entity's order item type ID.
         *
         * Used for finding/creating the appropriate order item when purchasing a
         * product (adding it to an order).
         *
         * @return string
         *   The order item type ID.
         */
        public function getOrderItemTypeId();
        /**
         * Gets the purchasable entity's order item title.
         *
         * Saved in the $order_item->title field to protect the order items of
         * completed orders against changes in the referenced purchased entity.
         *
         * @return string
         *   The order item title.
         */
        public function getOrderItemTitle();
        /**
         * Gets the purchasable entity's price.
         *
         * @return \Drupal\commerce_price\Price|null
         *   The price, or NULL.
         */
        public function getPrice();
      }