Method: courses.posts.addOnAttachments.create

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}/posts/{postId}/addOnAttachments

The URL uses gRPC Transcoding syntax.

Path parameters

Parameters
courseId

string

Required. Identifier of the course.
postId
(deprecated)

string

Optional. Deprecated, use itemId instead.

Query parameters

Parameters
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.
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.