# CartLinesUpdateInput

Input for a cart line item

## Input Definition

```graphql
input CartLinesUpdateInput {
  id: Int!
  quantity: Int!
  customizations: [CustomizationGroupOptionInput]
}
```

## Fields

| Field | Type | Required | Description |
|-------|------|----------|-------------|
| id | Int | Yes | The ID of the cart line item to update |
| quantity | Int | Yes | The quantity of the merchandise item to update |
| customizations | [CustomizationGroupOptionInput] | No | List of customizations for the merchandise item |

## Example

```graphql
mutation {
  updateCartLines(input: {
    id: 12345
    quantity: 2
    customizations: []
  }) {
    success
  }
}
```

## Related Types

- [CustomizationGroupOptionInput](/docs/api/input-types/customization-group-option-input)