GET objectives/…/events

Retrieves a list of historic objective evaluation events for a specific objective in a specified period of time.

In other words: the response of this endpoint indicates at which times the evaluation of the objective changed, going from OK to not OK or vice versa.

Possible objective events are:

OBJECTIVE_BECAME_OK – the user started meeting the objective
OBJECTIVE_BECAME_NOK – the user stopped meeting the objective

Note that this endpoint is meant to retrieve historic objective evaluation changes. To retrieve current objective evaluations, please see GET /api/2.1.1/group/{groupId}/objective/{objectiveId}/evaluations.

Resource URL

https://www.drillster.com/api/2.1.1/objectives/{objective_id}/events

Parameters

Field	Type	Description
`objective_id` required	String	The ID of the learning objective. Example value: `_2H7UjvE0MqJx0jYhg_H7A`
`user` optional	String	Optional filter to limit the returned records to a specific user ID. The value may be replaced with `self` to refer to the calling user.
`fromDate` optional	Date/time	Date and time from which the objective events will be returned. The value should be in ISO8601 format. Example: `2021-05-01T03:00:00Z` If omitted, a value of 7 days ago will be used.
`toDate` optional	Date/time	Date and time until which all objective events will be returned. The value should be in ISO8601 format. Example: `2021-07-01T03:00:00Z` If omitted, the current date and time is used.
`resultSize` optional	Integer	Objective events are returned in a paginated manner. The result size indicates the number of events to be returned. If omitted, a value of 100 is used. The default and maximum page sizes are subject to change!
`resultFrom` optional	String	The value of lastOnPage in the 2.1.1 Pagination object in the previous response. Use this parameter, in combination with `resultSize`, to apply pagination of the result. If it is not specified, the first page will be displayed.

Response

An 2.1.1 ObjectiveEvaluationEvents object, containing a page of objective evaluation events.

Example request

GET https://www.drillster.com/api/2.1.1/objectives/_2H7UjvE0MqJx0jYhg_H7A/events

Response

{
    "events": [
      {
        "objectiveEvaluation": {
          "objective": {
            "id": "DXDw-mzbfY73fqk0xSRJKA",
            "type": "ONEOFF",
            "reviewDate": "2021-07-21T07:56:32Z"
          },
          "user": {
            "person": {
              "id": "fikHYKc4Y2OjyE_7wrcWzQ",
              "creationUuid": "13814000-1dd2-11b2-8080-808080808080"
            },
            "id": "MDZJEJewWL0yg--2rjR10w",
            "name": "Steve Adams",
            "emailAddress": "steve@example.com",
            "type": "USER"
          },
          "met": false,
          "proficiency": 0,
          "evaluationDate": "2021-07-17T07:56:32Z",
          "okPlayablesCount": 0
        },
        "type": "OBJECTIVE_BECAME_OK"
      }
    ],
    "pagination": {
      "total": 1,
      "lastOnPage": "Mg==",
      "moreAvailable": false
    }
  }

Error responses

The following error situations are possible:

ID	Response code	Description
`invalid_time_period`	400 (Bad request)	Parameter fromDate should be before of toDate.
`invalid_result_size`	400 (Bad request)	Parameter resultSize must be a positive integer with a value smaller or equal to 1000.
`invalid_result_from`	400 (Bad request)	Parameter resultFrom must copied from the Pagination object of the previous page.
`not_permitted`	403 (Forbidden)	Account requesting the events of an objective must be a manager of the group where the objective exists.
`objective_not_found`	404 (Not found)	The objective was not found.
`account_not_found`	404 (Not found)	The account corresponding to the user parameter was not found.

Last updated on 2025-10-22