Automattic\WooCommerce\StoreApi\Utilities

CartController::set_cart_item_quantity │ public │ WC 1.0

Based on core set_quantity method, but validates if an item is sold individually first and enforces any limits in place.

Method of the class: CartController{}

No Hooks.

Returns

null. Nothing (null).

Usage

$CartController = new CartController();
$CartController->set_cart_item_quantity( $item_id, $quantity );
$item_id(string) (required)
Cart item id.
$quantity(int|float)
Cart quantity.
Default: 1

CartController::set_cart_item_quantity() code WC 10.8.1

woocommerce/src/StoreApi/Utilities/CartController.php 
public function set_cart_item_quantity( $item_id, $quantity = 1 ) {
	$cart_item = $this->get_cart_item( $item_id );

	if ( empty( $cart_item ) ) {
		throw new RouteException( 'woocommerce_rest_cart_invalid_key', esc_html__( 'Cart item does not exist.', 'woocommerce' ), 409 );
	}

	$product = $cart_item['data'] ?? false;

	if ( ! $product instanceof \WC_Product ) {
		throw new RouteException( 'woocommerce_rest_cart_invalid_product', esc_html__( 'Cart item is invalid.', 'woocommerce' ), 404 );
	}

	$quantity_validation = ( new QuantityLimits() )->validate_cart_item_quantity( $quantity, $cart_item );

	if ( is_wp_error( $quantity_validation ) ) {
		throw new RouteException( $quantity_validation->get_error_code(), $quantity_validation->get_error_message(), 400 ); // phpcs:ignore WordPress.Security.EscapeOutput.ExceptionNotEscaped
	}

	$cart = $this->get_cart_instance();
	$cart->set_quantity( $item_id, $quantity );
}