sale.basketitem.updateCatalogProduct

curl -X POST \
-H "Content-Type: application/json" \
-H "Accept: application/json" \
-d '{"id":6783,"fields":{"quantity":4},"auth":"**put_access_token_here**"}' \
https://**put_your_bitrix24_address**/rest/sale.basketitem.updateCatalogProduct

// This snippet is an ES module: top-level await requires type="module" or a bundler.
// $b24 is an already-initialized SDK instance (see the SDK "Get started" guide).
import { Text } from '@bitrix24/b24jssdk'
import type { B24Frame, ISODate } from '@bitrix24/b24jssdk'

declare const $b24: B24Frame

// Shape of the payload returned in result (match the "response handling" section of the page)
type BasketItemUpdateResult = {
  basketItem: {
    basePrice: number,
    canBuy: string,
    catalogXmlId: string,
    currency: string,
    customPrice: string,
    dateInsert: ISODate | null,
    dateUpdate: ISODate | null,
    dimensions: string,
    discountPrice: number,
    id: number,
    measureCode: string,
    measureName: string,
    name: string,
    orderId: number,
    price: number,
    productXmlId: string,
    quantity: number,
    sort: number,
    type: number,
    vatIncluded: string,
    vatRate: number | null,
    weight: number,
    xmlId: string,
  },
}

try {
  const response = await $b24.actions.v2.call.make<BasketItemUpdateResult>({
    method: 'sale.basketitem.updateCatalogProduct',
    params: {
      id: 6783,
      fields: {
        quantity: 4,
      },
    },
    requestId: Text.getUuidRfc4122()
  })

  // The payload is available only on a successful response
  if (!response.isSuccess) {
    console.error(response.getErrorMessages().join('; '))
  } else {
    const result = response.getData()!.result
    console.info(result.basketItem.id, result.basketItem.name, result.basketItem.quantity)
  }
} catch (error) {
  // Thrown on transport or SDK failures (AjaxError, SdkError, etc.)
  console.error(error)
}

<!-- Load the SDK (UMD build); it is exposed as the global B24Js -->
<script src="https://unpkg.com/@bitrix24/b24jssdk@1/dist/umd/index.min.js"></script>
<script>
  async function updateCatalogProduct() {
    try {
      // Initialize the SDK inside a Bitrix24 frame
      const $b24 = await B24Js.initializeB24Frame()

      const response = await $b24.actions.v2.call.make({
        method: 'sale.basketitem.updateCatalogProduct',
        params: {
          id: 6783,
          fields: {
            quantity: 4,
          },
        },
        requestId: B24Js.Text.getUuidRfc4122()
      })

      // The payload is available only on a successful response
      if (!response.isSuccess) {
        console.error(response.getErrorMessages().join('; '))
        return
      }

      const result = response.getData().result
      console.info(result.basketItem.id, result.basketItem.name, result.basketItem.quantity)
    } catch (error) {
      // Thrown on transport or SDK failures (AjaxError, SdkError, etc.)
      console.error(error)
    }
  }

  document.addEventListener('DOMContentLoaded', updateCatalogProduct)
</script>

from b24pysdk.errors import BitrixAPIError, BitrixSDKException

fields = {
    "quantity": 4,
}

try:
    bitrix_response = client.sale.basketitem.update_catalog_product(
        bitrix_id=6783,
        fields=fields,
    ).response
    result = bitrix_response.result
    print(result)
except BitrixAPIError as error:
    print(
        "Ошибка Bitrix API",
        f"error: {error.error}",
        f"error_description: {error.error_description}",
        sep="\n",
    )
except BitrixSDKException as error:
    print(f"Ошибка Bitrix SDK: {error.message}")
except Exception as error:
    print(f"Непредвиденная ошибка: {error}")

try {
    $response = $b24Service
        ->core
        ->call(
            'sale.basketitem.updateCatalogProduct',
            [
                'id'     => 6783,
                'fields' => [
                    'quantity' => 4,
                ],
            ]
        );

    $result = $response
        ->getResponseData()
        ->getResult();

    echo 'Success: ' . print_r($result, true);
    // Нужная вам логика обработки данных
    processData($result);

} catch (Throwable $e) {
    error_log($e->getMessage());
    echo 'Error updating catalog product: ' . $e->getMessage();
}

BX24.callMethod(
    "sale.basketitem.updateCatalogProduct",
    {
        id: 6783,
        fields: {
            quantity: 4,
        }
    },
)
    .then(
        function(result)
        {
            if (result.error())
            {
                console.error(result.error());
            }
            else
            {
                console.log(result.data());
            }
        },
        function(error)
        {
            console.info(error);
        }
    );

require_once('crest.php');

$result = CRest::call(
    'sale.basketitem.updateCatalogProduct',
    [
        'id' => 6783,
        'fields' => [
            'quantity' => 4,
        ]
    ]
);

echo '<PRE>';
print_r($result);
echo '</PRE>';

// client и ctx уже созданы — см. раздел «SDK для Go»
res, err := client.Core().Call(ctx, "sale.basketitem.updateCatalogProduct", b24.Params{
	"id": 6783,
	"fields": b24.Params{
		"quantity": 4,
	},
})
if err != nil {
	return fmt.Errorf("sale.basketitem.updateCatalogProduct: %w", err)
}

// Метод заворачивает ответ в объект с ключом "basketItem".
raw, ok := b24.Unwrap(res.Result, "basketItem")
if !ok {
	return fmt.Errorf("в ответе нет ключа basketItem")
}

var item struct {
	BasePrice    int    `json:"basePrice"`
	CanBuy       string `json:"canBuy"`
	CatalogXmlID string `json:"catalogXmlId"`
	Currency     string `json:"currency"`
	CustomPrice  string `json:"customPrice"`
	DateInsert   string `json:"dateInsert"`
}
if err := json.Unmarshal(raw, &item); err != nil {
	return fmt.Errorf("разбор ответа: %w", err)
}
fmt.Println(item.BasePrice, item.CanBuy)