[null,null,["上次更新時間：2025-08-21 (世界標準時間)。"],[],["The Display & Video 360 API v4 (beta) allows line item duplication via a POST request to `https://displayvideo.googleapis.com/v4/advertisers/{advertiserId}/lineItems/{lineItemId}:duplicate`. It requires `advertiserId` and `lineItemId` path parameters. The request body must include a `targetDisplayName` for the new item. The successful response provides a `duplicateLineItemId`. YouTube & Partners line items cannot be managed and high latency is common. The authorization scope needed is `https://www.googleapis.com/auth/display-video`.\n"],null,["# Method: advertisers.lineItems.duplicate\n\n- [HTTP request](#body.HTTP_TEMPLATE)\n- [Path parameters](#body.PATH_PARAMETERS)\n- [Request body](#body.request_body)\n - [JSON representation](#body.request_body.SCHEMA_REPRESENTATION)\n- [Response body](#body.response_body)\n - [JSON representation](#body.DuplicateLineItemResponse.SCHEMA_REPRESENTATION)\n- [Authorization scopes](#body.aspect)\n- [Try it!](#try-it)\n\nDuplicates a line item. Returns the ID of the created line item if successful.\n\nYouTube \\& Partners line items cannot be created or updated using the API.\n\n**This method regularly experiences high latency.** We recommend [increasing your default timeout](/display-video/api/guides/best-practices/timeouts#client_library_timeout) to avoid errors.\n\n### HTTP request\n\n`POST https://displayvideo.googleapis.com/v4/advertisers/{advertiserId}/lineItems/{lineItemId}:duplicate`\n\nThe URL uses [gRPC Transcoding](https://google.aip.dev/127) syntax.\n\n### Path parameters\n\n| Parameters ||\n|----------------|---------------------------------------------------------------------------------------------------------------------------------------------------|\n| `advertiserId` | `string (`[int64](https://developers.google.com/discovery/v1/type-format)` format)` Required. The ID of the advertiser this line item belongs to. |\n| `lineItemId` | `string (`[int64](https://developers.google.com/discovery/v1/type-format)` format)` Required. The ID of the line item to duplicate. |\n\n### Request body\n\nThe request body contains data with the following structure:\n\n| JSON representation |\n|---------------------------------------------------------------------------------------------------------------------------------------------|\n| ``` { \"targetDisplayName\": string, \"containsEuPoliticalAds\": enum (/display-video/api/reference/rest/v4/EuPoliticalAdvertisingStatus) } ``` |\n\n| Fields ||\n|--------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| `targetDisplayName` | `string` The display name of the new line item. Must be UTF-8 encoded with a maximum size of 240 bytes. |\n| `containsEuPoliticalAds` | `enum (`[EuPoliticalAdvertisingStatus](/display-video/api/reference/rest/v4/EuPoliticalAdvertisingStatus)`)` Whether this line item will serve European Union political ads. If [containsEuPoliticalAds](/display-video/api/reference/rest/v4/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. \u003cbr /\u003e | **Warning** : Starting **September 8, 2025** , this field must be set. If not, either the value `DOES_NOT_CONTAIN_EU_POLITICAL_ADVERTISING` will be assigned to the line item if the parent advertiser has declared that it does not serve EU political ads, or **the request will fail**. \u003cbr /\u003e |\n\n### Response body\n\nIf successful, the response body contains data with the following structure:\n\n| JSON representation |\n|-------------------------------------------|\n| ``` { \"duplicateLineItemId\": string } ``` |\n\n| Fields ||\n|-----------------------|----------------------------------------------------------------------------------------------------------------------|\n| `duplicateLineItemId` | `string (`[int64](https://developers.google.com/discovery/v1/type-format)` format)` The ID of the created line item. |\n\n### Authorization scopes\n\nRequires the following OAuth scope:\n\n- `https://www.googleapis.com/auth/display-video`\n\nFor more information, see the [OAuth 2.0 Overview](/identity/protocols/OAuth2)."]]
