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Description

Based on core set_quantity method, but validates if an item is sold individually first.

Usage

CartController::set_cart_item_quantity( $item_id, $quantity );

Parameters

$item_id

( string ) required – Cart item id.

$quantity

( integer ) optional default: 1 – Cart quantity.

Returns

void

Source

File name: woocommerce/packages/woocommerce-blocks/src/StoreApi/Utilities/CartController.php
Lines:

  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', __( 'Cart item does not exist.', 'woocommerce' ), 404 );
    }

    $product = $cart_item['data'];

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

    if ( $product->is_sold_individually() && $quantity > 1 ) {
      throw new RouteException(
        'woocommerce_rest_cart_product_sold_individually',
        sprintf(
          /* translators: %s: product name */
          __( 'You cannot add another "%s" to your cart.', 'woocommerce' ),
          $product->get_name()
        ),
        400
      );
    }
    $cart = $this->get_cart_instance();
    $cart->set_quantity( $item_id, $quantity );
  }
 

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