# Method: advertisers.lineItems.generateDefault

> [!WARNING]
> Display \& Video 360 API v3 has sunset. Use [v4](https://developers.google.com/display-video/api/reference/rest/v4) instead.

- [HTTP request](https://developers.google.com/display-video/api/reference/rest/v3/advertisers.lineItems/generateDefault#body.HTTP_TEMPLATE)
- [Path parameters](https://developers.google.com/display-video/api/reference/rest/v3/advertisers.lineItems/generateDefault#body.PATH_PARAMETERS)
- [Request body](https://developers.google.com/display-video/api/reference/rest/v3/advertisers.lineItems/generateDefault#body.request_body)
  - [JSON representation](https://developers.google.com/display-video/api/reference/rest/v3/advertisers.lineItems/generateDefault#body.request_body.SCHEMA_REPRESENTATION)
- [Response body](https://developers.google.com/display-video/api/reference/rest/v3/advertisers.lineItems/generateDefault#body.response_body)
- [Authorization scopes](https://developers.google.com/display-video/api/reference/rest/v3/advertisers.lineItems/generateDefault#body.aspect)
- [Try it!](https://developers.google.com/display-video/api/reference/rest/v3/advertisers.lineItems/generateDefault#try-it)

Creates a new line item with settings (including targeting) inherited from the insertion order and an `ENTITY_STATUS_DRAFT` `https://developers.google.com/display-video/api/reference/rest/v3/advertisers.lineItems#LineItem.FIELDS.entity_status`. Returns the newly created line item if successful. There are default values based on the three fields:

- The insertion order's `https://developers.google.com/display-video/api/reference/rest/v3/advertisers.insertionOrders#InsertionOrder.FIELDS.insertion_order_type`
- The insertion order's `https://developers.google.com/display-video/api/reference/rest/v3/advertisers.insertionOrders#InsertionOrderBudget.FIELDS.automation_type`
- The given `https://developers.google.com/display-video/api/reference/rest/v3/advertisers.lineItems/generateDefault#body.request_body.FIELDS.line_item_type`

YouTube \& Partners line items cannot be created or updated using the API.

### HTTP request

`POST https://displayvideo.googleapis.com/v3/advertisers/{advertiserId}/lineItems:generateDefault`

The URL uses [gRPC Transcoding](https://google.aip.dev/127) syntax.

### Path parameters

| Parameters ||
|---|---|
| `advertiserId` | `string (https://developers.google.com/discovery/v1/type-format format)` Required. The ID of the advertiser this line item belongs to. |

### Request body

The request body contains data with the following structure:

| JSON representation |
|---|
| ``` { "insertionOrderId": string, "displayName": string, "lineItemType": enum (`https://developers.google.com/display-video/api/reference/rest/v3/advertisers.lineItems#LineItemType`), "mobileApp": { object (`https://developers.google.com/display-video/api/reference/rest/v3/advertisers.lineItems#MobileApp`) }, "containsEuPoliticalAds": enum (`https://developers.google.com/display-video/api/reference/rest/v3/EuPoliticalAdvertisingStatus`) } ``` |

| Fields ||
|---|---|
| `insertionOrderId` | `string (https://developers.google.com/discovery/v1/type-format format)` Required. The unique ID of the insertion order that the line item belongs to. |
| `displayName` | `string` Required. The display name of the line item. Must be UTF-8 encoded with a maximum size of 240 bytes. |
| `lineItemType` | ``enum (`https://developers.google.com/display-video/api/reference/rest/v3/advertisers.lineItems#LineItemType`)`` Required. The type of the line item. |
| `mobileApp` | ``object (`https://developers.google.com/display-video/api/reference/rest/v3/advertisers.lineItems#MobileApp`)`` The mobile app promoted by the line item. This is applicable only when `https://developers.google.com/display-video/api/reference/rest/v3/advertisers.lineItems/generateDefault#body.request_body.FIELDS.line_item_type` is either `LINE_ITEM_TYPE_DISPLAY_MOBILE_APP_INSTALL` or `LINE_ITEM_TYPE_VIDEO_MOBILE_APP_INSTALL`. |
| `containsEuPoliticalAds` | ``enum (`https://developers.google.com/display-video/api/reference/rest/v3/EuPoliticalAdvertisingStatus`)`` Whether this line item will serve European Union political ads. If `https://developers.google.com/display-video/api/reference/rest/v3/advertisers#Advertiser.FIELDS.contains_eu_political_ads` has been set to `DOES_NOT_CONTAIN_EU_POLITICAL_ADVERTISING` in the parent advertiser, then this field will be assigned `DOES_NOT_CONTAIN_EU_POLITICAL_ADVERTISING` if not otherwise specified. This field can then be updated using the UI, API, or Structured Data Files. This field must be assigned when creating a new line item. Otherwise, **the `advertisers.lineItems.create` request will fail**. |

### Response body

If successful, the response body contains an instance of `https://developers.google.com/display-video/api/reference/rest/v3/advertisers.lineItems#LineItem`.

### Authorization scopes

Requires the following OAuth scope:

- `https://www.googleapis.com/auth/display-video`

For more information, see the [OAuth 2.0 Overview](https://developers.google.com/identity/protocols/OAuth2).