Google Classroom add-ons are now generally available to developers! Please see the
add-ons documentation for more information.
Method: courses.announcements.addOnAttachments.create
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Creates an add-on attachment under a post.
Requires the add-on to have permission to create new attachments on the post.
This method returns the following error codes:
PERMISSION_DENIED for access errors.INVALID_ARGUMENT if the request is malformed.NOT_FOUND if one of the identified resources does not exist.
HTTP request
POST https://classroom.googleapis.com/v1/courses/{courseId}/announcements/{itemId}/addOnAttachments
The URL uses gRPC Transcoding syntax.
Path parameters
| Parameters |
courseId |
string
Required. Identifier of the course.
|
itemId |
string
Identifier of the Announcement, CourseWork, or CourseWorkMaterial under which to create the attachment. This field is required, but is not marked as such while we are migrating from postId.
|
Query parameters
| Parameters |
postId
(deprecated) |
string
Optional. Deprecated, use itemId instead.
|
addOnToken |
string
Optional. Token that authorizes the request. The token is passed as a query parameter when the user is redirected from Classroom to the add-on's URL. This authorization token is required for in-Classroom attachment creation but optional for partner-first attachment creation. Returns an error if not provided for partner-first attachment creation and the developer projects that created the attachment and its parent stream item do not match.
|
Request body
The request body contains an instance of AddOnAttachment.
Response body
If successful, the response body contains a newly created instance of AddOnAttachment.
Authorization scopes
Requires the following OAuth scope:
https://www.googleapis.com/auth/classroom.addons.teacher
For more information, see the Authorization guide.
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Last updated 2025-04-17 UTC.
[null,null,["Last updated 2025-04-17 UTC."],[],[],null,["# Method: courses.announcements.addOnAttachments.create\n\n- [HTTP request](#body.HTTP_TEMPLATE)\n- [Path parameters](#body.PATH_PARAMETERS)\n- [Query parameters](#body.QUERY_PARAMETERS)\n- [Request body](#body.request_body)\n- [Response body](#body.response_body)\n- [Authorization scopes](#body.aspect)\n\nCreates an add-on attachment under a post.\n\nRequires the add-on to have permission to create new attachments on the post.\n\nThis method returns the following error codes:\n\n- `PERMISSION_DENIED` for [access errors](/workspace/classroom/reference/Access.Errors).\n- `INVALID_ARGUMENT` if the request is malformed.\n- `NOT_FOUND` if one of the identified resources does not exist.\n\n### HTTP request\n\n`POST https://classroom.googleapis.com/v1/courses/{courseId}/announcements/{itemId}/addOnAttachments`\n\nThe URL uses [gRPC Transcoding](https://google.aip.dev/127) syntax.\n\n### Path parameters\n\n| Parameters ||\n|------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| `courseId` | `string` Required. Identifier of the course. |\n| `itemId` | `string` Identifier of the `Announcement`, `CourseWork`, or `CourseWorkMaterial` under which to create the attachment. This field is required, but is not marked as such while we are migrating from postId. |\n\n### Query parameters\n\n| Parameters ||\n|---------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| `postId` **(deprecated)** | `string` Optional. Deprecated, use `itemId` instead. |\n| `addOnToken` | `string` Optional. Token that authorizes the request. The token is passed as a query parameter when the user is redirected from Classroom to the add-on's URL. This authorization token is required for in-Classroom attachment creation but optional for partner-first attachment creation. Returns an error if not provided for partner-first attachment creation and the developer projects that created the attachment and its parent stream item do not match. |\n\n### Request body\n\nThe request body contains an instance of [AddOnAttachment](/workspace/classroom/reference/rest/v1/courses.announcements.addOnAttachments#AddOnAttachment).\n\n### Response body\n\nIf successful, the response body contains a newly created instance of [AddOnAttachment](/workspace/classroom/reference/rest/v1/courses.announcements.addOnAttachments#AddOnAttachment).\n\n### Authorization scopes\n\nRequires the following OAuth scope:\n\n- `https://www.googleapis.com/auth/classroom.addons.teacher`\n\nFor more information, see the [Authorization guide](/workspace/guides/configure-oauth-consent)."]]
