# CartLineInput

Input for a cart line item. Used when adding or updating items in a shopping cart with optional customization options.

## Input Definition

```graphql
input CartLineInput {
  merchandiseId: Int!
  quantity: Int!
  customizations: [CustomizationGroupOptionInput]
}
```

## Fields

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

## Example

```graphql
mutation AddCartLine {
  addToCart(input: {
    merchandiseId: 54321
    quantity: 2
    customizations: [
      {
        groupId: 1
        optionId: 101
      }
    ]
  }) {
    cart {
      id
      lineItems {
        merchandiseId
        quantity
      }
    }
  }
}
```

## Related Types

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