Update class-root-query.php (#584)

Fix for bug #583.

includes/type/object/class-root-query.php

@@ -450,7 +450,7 @@ public static function register_fields() {
 							'description' => __( 'Type of ID being used identify product', 'wp-graphql-woocommerce' ),
 						),
 					),
-					'resolve'     => function ( $source, array $args, AppContext $context, ResolveInfo $info ) use ( $type_name ) {
+					'resolve'     => function ( $source, array $args, AppContext $context, ResolveInfo $info ) use ( $type_key ) {
 						$id = isset( $args['id'] ) ? $args['id'] : null;
 						$id_type = isset( $args['idType'] ) ? $args['idType'] : 'global_id';
 
@@ -479,9 +479,9 @@ public static function register_fields() {
 						if ( empty( $product_id ) ) {
 							/* translators: %1$s: ID type, %2$s: ID value */
 							throw new UserError( sprintf( __( 'No product ID was found corresponding to the %1$s: %2$s', 'wp-graphql-woocommerce' ), $id_type, $product_id ) );
-						} elseif ( \WC()->product_factory->get_product_type( $product_id ) !== $type_name ) {
+						} elseif ( \WC()->product_factory->get_product_type( $product_id ) !== $type_key ) {
 							/* translators: Invalid product type message %1$s: Product ID, %2$s: Product type */
-							throw new UserError( sprintf( __( 'This product of ID %1$s is not a %2$s product', 'wp-graphql-woocommerce' ), $product_id, $type_name ) );
+							throw new UserError( sprintf( __( 'This product of ID %1$s is not a %2$s product', 'wp-graphql-woocommerce' ), $product_id, $type_key ) );
 						} elseif ( get_post( $product_id )->post_type !== 'product' ) {
 							/* translators: %1$s: ID type, %2$s: ID value */
 							throw new UserError( sprintf( __( 'No product exists with the %1$s: %2$s', 'wp-graphql-woocommerce' ), $id_type, $product_id ) );