This is a beta release of documentation for Magento 2.4, published for previewing soon-to-be-released functionality. Content in this version is subject to change. Links to the v2.4 code base may not properly resolve until the code is officially released.

updateCartItems mutation

The updateCartItems mutation allows you to replace the current quantity of one or more cart items with the specified quantities. It does not perform calculations to determine the quantity of cart items.

Setting the quantity to 0 removes an item from the cart.

Syntax

mutation: {updateCartItems(input: UpdateCartItemsInput): {UpdateCartItemsOutput}}

Example usage

The following example changes the quantity of cart item 13. The new quantity is 3.

Request:

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mutation {
  updateCartItems(
    input: {
      cart_id: "IeTUiU0oCXjm0uRqGCOuhQ2AuQatogjG",
      cart_items: [
        {
          cart_item_id: 13
          quantity: 3
        }
      ]
    }
  ){
    cart {
      items {
        id
        product {
          name
        }
        quantity
      }
      prices {
        grand_total{
          value
          currency
        }
      }
    }
  }
}

Response:

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{
  "data": {
    "updateCartItems": {
      "cart": {
        "items": [
          {
            "id": "13",
            "product": {
              "name": "Strive Shoulder Pack"
            },
            "quantity": 3
          },
          {
            "id": "14",
            "product": {
              "name": "Affirm Water Bottle "
            },
            "quantity": 1
          }
        ],
        "prices": {
          "grand_total": {
            "value": 103,
            "currency": "USD"
          }
        }
      }
    }
  }
}

Input attributes

The UpdateCartItemsInput object is listed first. All child objects are listed in alphabetical order.

UpdateCartItemsInput object

The UpdateCartItemsInput object must contain the following attributes:

Attribute Data Type Description
cart_id String! The unique ID that identifies the customer’s cart
cart_items CartItemUpdateInput! Contains the cart item IDs and quantity of each item

CartItemUpdateInput object

The CartItemUpdateInput object must contain the following attributes:

Attribute Data Type Description
cart_item_id Int! The unique ID assigned when a customer places an item in the cart
customizable_options [CustomizableOptionInput!] An array that defines customizable options for the product
quantity Float The new quantity of the item. A value of 0 removes the item from the cart

CustomizableOptionInput object

The CustomizableOptionInput object must contain the following attributes:

Attribute Data Type Description
id Int! A unique ID assigned to the customizable option
value_string String! A value assigned to the customizable option

Output attributes

The UpdateCartItemsOutput object contains the Cart object.

Attribute Data Type Description
cart Cart! Describes the contents of the specified shopping cart

Cart object

Attribute Data Type Description
applied_coupon AppliedCoupon Deprecated. Use applied_coupons instead
applied_coupons [AppliedCoupon] An array of AppliedCoupon objects. Each object contains the code text attribute, which specifies the coupon code
applied_gift_cards [AppliedGiftCard] An array of AppliedGiftCard objects. An AppliedGiftCard object contains the code text attribute, which specifies the gift card code. applied_gift_cards is a Commerce-only attribute, defined in the GiftCardAccountGraphQl module
applied_store_credit AppliedStoreCredit Contains store credit information applied to the cart. applied_store_credit is a Commerce-only attribute, defined in the CustomerBalanceGraphQl module
available_payment_methods [AvailablePaymentMethod] Available payment methods
billing_address BillingCartAddress Contains the billing address specified in the customer’s cart
email String The customer’s email address
id ID! The ID of the cart
is_virtual Boolean! Indicates whether the cart contains only virtual products
items [CartItemInterface] Contains the items in the customer’s cart
prices CartPrices Contains subtotals and totals
selected_payment_method SelectedPaymentMethod Selected payment method
shipping_addresses [ShippingCartAddress]! Contains one or more shipping addresses
total_quantity Float! Total Quantity of products in the cart

Cart query output provides more information about the Cart object.

Errors

Error Description
Could not find cart item with id: XXX The specified input.cart_items.cart_item_id value does not exist in the quote_item database table.
Could not find a cart with ID "XXX" The specified cart_id value does not exist in the quote_id_mask database table.
Required parameter "cart_id" is missing. The value specified in the cart_id argument is empty.
Required parameter "cart_items" is missing. The cart_items argument is empty, or its value is specified as a non-array value.
Required parameter "quantity" for "cart_items" is missing. The required input.cart_items.quantity argument must be specified.
The current user cannot perform operations on cart "XXX" An unauthorized user (guest) tried to update a customer’s cart, or an authorized user (customer) tried to update the cart of another customer.