Fix Product Variation Shipping Class

Author: robbiebel

includes/model/class-product-variation.php

@@ -231,6 +231,19 @@ protected function init() {
 				'shipping_class_id' => function () {
 					return ! empty( $this->wc_data->get_shipping_class_id() ) ? $this->wc_data->get_shipping_class_id() : null;
 				},
+				'shippingClassId' => function () {
+					return ! empty( $this->wc_data->get_shipping_class_id() ) ? $this->wc_data->get_shipping_class_id() : null;
+				},
+				'shippingClass'   => function () {
+					$shipping_class_id   = $this->wc_data->get_shipping_class_id();
+					$shipping_class_term = get_term( $shipping_class_id, 'product_shipping_class' );
+
+					if ( ! is_wp_error( $shipping_class_term ) && is_a( $shipping_class_term, 'WP_Term' ) ) {
+						$shipping_class = $shipping_class_term;
+					}
+
+					return $shipping_class ?? null;
+				},
 				'image_id'          => function () {
 					return ! empty( $this->wc_data->get_image_id() ) ? $this->wc_data->get_image_id() : null;
 				},

includes/model/class-product.php

@@ -413,7 +413,7 @@ protected function init() {
 						return ! empty( $this->wc_data->get_height() ) ? $this->wc_data->get_height() : null;
 					},
 					'shippingClassId'   => function () {
-						return ! empty( $this->wc_data->get_image_id() ) ? $this->wc_data->get_shipping_class_id() : null;
+						return ! empty( $this->wc_data->get_shipping_class_id() ) ? $this->wc_data->get_shipping_class_id() : null;
 					},
 					'shippingRequired'  => function () {
 						return $this->wc_data->needs_shipping();

includes/type/interface/class-product-variation.php

@@ -242,7 +242,7 @@ public static function get_fields() {
 				'description' => __( 'Product variation purchase_note', 'wp-graphql-woocommerce' ),
 			],
 			'shippingClass'     => [
-				'type'        => 'String',
+				'type'        => 'ShippingClass',
 				'description' => __( 'Product variation shipping class', 'wp-graphql-woocommerce' ),
 			],
 			'catalogVisibility' => [