How to fetch process-variable of a "Completed" Process-Instance from History?

Camunda 7 Topics Discussion & Questions
1

Hi,

I want to get the values of all the “process-variable” of a Completed process-instance but as the process has moved to History…I am not able to fetch them.

Example:
Request:

http://ip:port/engine-rest/process-instance/fad617fd-fb5b-11e7-a56f-0242ac110003/variables

Response:

{
“type”: “NullValueException”,
“message”: “execution fad617fd-fb5b-11e7-a56f-0242ac110003 doesn’t exist: execution is null”
}

Note: As the process has move to completed status i.e. in History

If I use below API:
Request:

http://ip:port/engine-rest/history/process-instance/fad617fd-fb5b-11e7-a56f-0242ac110003

Response:

{
    "id": "fad617fd-fb5b-11e7-a56f-0242ac110003",
    "businessKey": null,
    "processDefinitionId": "abc:2:bdaa4db9-fb5b-11e7-a56f-0242ac110003",
    "processDefinitionKey": "abc",
    "processDefinitionName": "abc",
    "startTime": "2018-01-17T13:26:52",
    "endTime": "2018-01-19T16:32:59",
    "durationInMillis": 183966330,
    "startUserId": null,
    "startActivityId": "StartEvent_1",
    "deleteReason": null,
    "superProcessInstanceId": null,
    "superCaseInstanceId": null,
    "caseInstanceId": null,
    "tenantId": null,
    "state": "COMPLETED"
}

How do I fetch the process-variable of a Process-instance in Completed status??

Regards,
Tushar

2

I think you need to look at this call:
https://docs.camunda.org/manual/7.8/reference/rest/history/variable-instance/get-variable-instance-query/

This will let you query for historic variable instances - you can use the process instance id as a query parameter