Parsing a JSON inside DMN using FEEL script

Camunda 7 Topics Discussion & Questions
1

Iam trying to fetch the data from json object directly using the feel script, but it throws an error
no variable found for name ‘eventId’"

payload:

{
“eventId”:“test”,
“postEventState”:“submitted”,
“state”:{
“nested”:“yes”
}
}

FEEL script:

image
image355×763 17.7 KB

Can someone help me on what iam doing wrong

2

Hi @harish1,

Below post might be of help to you

3

But Iam not using any java code inside my bpmn. Iam directly sending data in api body and then fetching it inside the DMN for processing.

4

Hi @harish1,

What is matter is to have a valid json variable regardless of the way it is created.

Could you please share the REST endpoint you call and the sent payload.

5

endpoint:
http://localhost:8080/engine-rest/process-definition/key/first-project-process/start
RequestBody:
{
“eventId”:“test”,
“postEventState”:“submitted”,
“state”:{
“nested”:“yes”
}
}

image

process.bpmn (2.2 KB)
test-dmn.dmn (2.3 KB)

6

Your request body should be as follow (Notice: variable name is called: jsonData)

{
    "variables": {
        "jsonData": {
            "value": "{\"eventId\":\"test\",\"postEventState\":\"submitted\",\"state\":{\"nested\":\"yes\"}}",
            "type": "Json"
        }
    }
}
7

It says Json is invalid
{
“type”: “InvalidRequestException”,
“message”: “Cannot instantiate process definition camunda-process:4:cce21c39-c98f-11ed-b628-00505691718c: Unsupported value type ‘Json’”,
“code”: null
}

8

Hi @harish1,

Please have a look at below docs

9

Thanks it worked.

10