}
						break;
					case 'meta_data':
						if ( is_array( $value ) ) {
							foreach ( $value as $meta ) {
								$order->update_meta_data( $meta['key'], $meta['value'], isset( $meta['id'] ) ? $meta['id'] : '' );
							}
						}
						break;
					default:
						if ( is_callable( array( $order, "set_{$key}" ) ) ) {
							$order->{"set_{$key}"}( $value );
						}
						break;
				}
			}
		}

		/**
		 * Filters an object before it is inserted via the REST API.
		 *
		 * The dynamic portion of the hook name, `$this->post_type`,
		 * refers to the object type slug.
		 *
		 * @param WC_Data         $order    Object object.
		 * @param WP_REST_Request $request  Request object.
		 * @param bool            $creating If is creating a new object.
		 */
		return apply_filters( "woocommerce_rest_pre_insert_{$this->post_type}_object", $order, $request, $creating );
	}

	/**
	 * Save an object data.
	 *
	 * @since  3.0.0
	 * @throws WC_REST_Exception But all errors are validated before returning any data.
	 * @param  WP_REST_Request $request  Full details about the request.
	 * @param  bool            $creating If is creating a new object.
	 * @return WC_Data|WP_Error
	 */
	protected function save_object( $request, $creating = false ) {
		try {
			$object = $this->prepare_object_for_database( $request, $creating );

			if ( is_wp_error( $object ) ) {
				return $object;
			}

			// Make sure gateways are loaded so hooks from gateways fire on save/create.
			WC()->payment_gateways();

			if ( ! is_null( $request['customer_id'] ) && 0 !== $request['customer_id'] ) {
				// Make sure customer exists.
				if ( false === get_user_by( 'id', $request['customer_id'] ) ) {
					throw new WC_REST_Exception( 'woocommerce_rest_invalid_customer_id', __( 'Customer ID is invalid.', 'woocommerce' ), 400 );
				}

				// Make sure customer is part of blog.
				if ( is_multisite() && ! is_user_member_of_blog( $request['customer_id'] ) ) {
					add_user_to_blog( get_current_blog_id(), $request['customer_id'], 'customer' );
				}
			}

			if ( $creating ) {
				$object->set_created_via( 'rest-api' );
				$object->set_prices_include_tax( 'yes' === get_option( 'woocommerce_prices_include_tax' ) );
				$object->calculate_totals();
			} else {
				// If items have changed, recalculate order totals.
				if ( isset( $request['billing'] ) || isset( $request['shipping'] ) || isset( $request['line_items'] ) || isset( $request['shipping_lines'] ) || isset( $request['fee_lines'] ) || isset( $request['coupon_lines'] ) ) {
					$object->calculate_totals( true );
				}
			}

			// Set coupons.
			$this->calculate_coupons( $request, $object );

			// Set status.
			if ( ! empty( $request['status'] ) ) {
				$object->set_status( $request['status'] );
			}

			$object->save();

			// Actions for after the order is saved.
			if ( true === $request['set_paid'] ) {
				if ( $creating || $object->needs_payment() ) {
					$object->payment_complete( $request['transaction_id'] );
				}
			}

			return $this->get_object( $object->get_id() );
		} catch ( WC_Data_Exception $e ) {
			return new WP_Error( $e->getErrorCode(), $e->getMessage(), $e->getErrorData() );
		} catch ( WC_REST_Exception $e ) {
			return new WP_Error( $e->getErrorCode(), $e->getMessage(), array( 'status' => $e->getCode() ) );
		}
	}

	/**
	 * Prepare objects query.
	 *
	 * @since  3.0.0
	 * @param  WP_REST_Request $request Full details about the request.
	 * @return array
	 */
	protected function prepare_objects_query( $request ) {
		// This is needed to get around an array to string notice in WC_REST_Orders_V2_Controller::prepare_objects_query.
		$statuses = $request['status'];
		unset( $request['status'] );
		$args = parent::prepare_objects_query( $request );

		$args['post_status'] = array();
		foreach ( $statuses as $status ) {
			if ( in_array( $status, $this->get_order_statuses(), true ) ) {
				$args['post_status'][] = 'wc-' . $status;
			} elseif ( 'any' === $status ) {
				// Set status to "any" and short-circuit out.
				$args['post_status'] = 'any';
				break;
			} else {
				$args['post_status'][] = $status;
			}
		}

		// Put the statuses back for further processing (next/prev links, etc).
		$request['status'] = $statuses;

		return $args;
	}

	/**
	 * Get the Order's schema, conforming to JSON Schema.
	 *
	 * @return array
	 */
	public function get_item_schema() {
		$schema = parent::get_item_schema();

		$schema['properties']['coupon_lines']['items']['properties']['discount']['readonly'] = true;

		return $schema;
	}

	/**
	 * Get the query params for collections.
	 *
	 * @return array
	 */
	public function get_collection_params() {
		$params = parent::get_collection_params();

		$params['status'] = array(
			'default'           => 'any',
			'description'       => __( 'Limit result set to orders which have specific statuses.', 'woocommerce' ),
			'type'              => 'array',
			'items'             => array(
				'type' => 'string',
				'enum' => array_merge( array( 'any', 'trash' ), $this->get_order_statuses() ),
			),
			'validate_callback' => 'rest_validate_request_arg',
		);

		return $params;
	}
}