How to skip first/current request in newman through data file? - postman

Question

I have a column called 'value' in my data.csv file. When its value is 1, I want to run only the request with ID "1" (and skip request ID "2") and when it is 2, request ID "2" should run (and skip request ID "1").
I tried the following already:
Collection pre-request script:
var valueFromData = pm.iterationData.get("value");
if(valueFromData === 1) {
postman.setNextRequest("1");
}
if(valueFromData === 2) {
postman.setNextRequest("2");
}
Request "1" pre-request script:
var valueFromData = pm.iterationData.get("value");
if(valueFromData === 1) {
postman.setNextRequest(null);
}
if(valueFromData === 2) {
postman.setNextRequest("2");
}
Request "2" pre-request script:
var valueFromData = pm.iterationData.get("value");
if(valueFromData === 1) {
postman.setNextRequest(null);
}
if(valueFromData === 2) {
postman.setNextRequest(null);
}
Actual result:
When value = 1, RequestId "1" is called. RequestId "2" is skipped due to the next request being set as null. This is fine.
When value = 2, RequestId "1" is not expected to be called. But it is called! RequestId "2" is called after that.
Expected result:
When value = 1, only RequestId "1" should be called. RequestId "2" should be skipped
When value = 2, only RequestId "2" should be called. RequestId "1" should be skipped
In short, the first request of collection is always called irrespective of setting next requests. May I know how to skip the first/current request conditionally please?

Answer 1

Method name is setNextRequest()
I allways use it in test segment to set next request, not current in pre-request segment.
My proposition:
delete collection script as pointless
add empty/neutral request "0"
set next request here:
if(valueFromData === 1) {
postman.setNextRequest("1");
}
if(valueFromData === 2) {
postman.setNextRequest("2");
}
in test script in "1" set:
if(valueFromData === 1) {
postman.setNextRequest(null); }
delete script inside "2" as pointless
This solution isn't elegnt but should work.