cartLineItemsUpdate

Mutationin Cart

Update quantities of existing line items

Arguments

Argument	Type	Description
`id`	`ID!`
`version`	`String`
`lineItems`	`[CartLineItemUpdateInput!]!`

Returns

CartLineItemsUpdateResponse!

Field	Type	Description
`cart`	`Cart`	Cart information after line items are updated
`lineResults`	`[CartLineItemUpdateResult!]`	One result per requested change, in the order requested. The changes that can be made are, even when others are refused. Null when the request failed as a whole, which cartErrors then says, and where the engine reports no result per line.
`cartErrors`	`[CartLineItemsUpdateError!]`	Error details if line item update failed

Example

mutation CartLineItemsUpdate(
  $id: ID!
  $version: String
  $lineItems: [CartLineItemUpdateInput!]!
) {
  cartLineItemsUpdate(id: $id, version: $version, lineItems: $lineItems) {
    cart {
      id
      version
      createdAt
      lastModifiedAt
      currency
      customerEmail
      isGuest
      totalQuantity
      deliveryRemarks
      vatNumber
      purchaseOrderNumber
      deliverySplit
      requestedDeliveryDate
      earliestCompleteDeliveryDate
      name
      defaultName
      status
    }
    lineResults {
      id
      quantity
      failure
      message
    }
    cartErrors {
      __typename
      ... on ValidationError {
        message
      }
      ... on CartError {
        message
        code
      }
    }
  }
}

{
  "id": "id-1",
  "version": "Example",
  "lineItems": [
    {
      "id": "Example",
      "quantity": 1
    }
  ]
}

{
  "data": {
    "cartLineItemsUpdate": {
      "cart": {
        "id": "id-1",
        "version": "Example",
        "createdAt": "2026-10-01T09:30:00Z",
        "lastModifiedAt": "2026-10-01T09:30:00Z",
        "currency": "EUR",
        "customerEmail": "jane@example.com",
        "isGuest": true,
        "totalQuantity": 1,
        "deliveryRemarks": "Example",
        "vatNumber": "Example",
        "purchaseOrderNumber": "Example",
        "deliverySplit": "COMPLETE",
        "requestedDeliveryDate": "2026-10-01",
        "earliestCompleteDeliveryDate": "2026-10-01",
        "name": "Example",
        "defaultName": "Example",
        "status": "ACTIVE"
      },
      "lineResults": [
        {
          "id": "Example",
          "quantity": 1,
          "failure": "NOT_FOUND",
          "message": "Example"
        }
      ],
      "cartErrors": [
        {
          "__typename": "ValidationError",
          "message": "Example"
        }
      ]
    }
  }
}

The query selects the return type's fields two levels deep; pick the ones you need. The response shows its shape with placeholder values.

Served by

@evolve-framework/commercetools	Resolved
@evolve-framework/medusa	Resolved
@evolve-framework/sfcc	Resolved

Used by

The storefront packages that send it, in these GraphQL documents:

@evolve-storefront/feature-cart: CartLineItemsUpdate