# CartLineInput

Input for a cart line item. This input type is used to specify the merchandise and quantity to add to a cart, along with any customizations.

## 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(input: {
    merchandiseId: 12345
    quantity: 2
    customizations: [
      {
        groupId: 1
        optionId: 5
      }
    ]
  }) {
    cart {
      id
      lines {
        merchandiseId
        quantity
      }
    }
  }
}
```

## Related Types

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