Iterations or Chaining Requests

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1

I’ve created a variable to extract and store the “partyId” from objects within an array. This works great, and I have about 1,500 partyId’s stored within the variable.

let PartyList = [1]
_.each(pm.response.json(), (arrItem) => {
PartyList.push(arrItem.partyId)
})

pm.environment.set(‘PartyList’, JSON.stringify(PartyList))

I have a second GET in my collection I’d like to run based off the results stored in my variable.

//api/common/v1/parties/{{PartyList}}?properties=Relationships

The filter on the endpoint can only support one partyId at once and therefore when I simply insert my variable the request fails. Some how, I need to loop requests while cycling through the values store in my variable.

Hoping there’s a sensible way to approach this. Thank you in advance for any help.

2

Hey @matteu1!

You can use postman.setNextRequest to help with this.

Here’s a blog post explaining how this is done: https://ambertests.com/2019/01/28/postman-how-to-dynamic-iteration-within-a-collection/

And here’s a template you can use to try it out: https://explore.postman.com/templates/677/dynamicloop

Take a look at the pre-request and test scripts in that example template.

You can adjust variables to set the full list and the current index. Then you can use postman.setNextRequest("<name>") to continue looping. At the end of the loop, you can postman.setNextRequest(null). When you run this in the collection runner, you should see it loop.

Hope this helps.

Best,

Kevin

3

Hey Kevin,

I want to extract the orderId from the GET results and use it in a POST method.

Result from the GET function is as below

{
“message”: “20 transactions fetched”,
“transactions”: [
{
“settlementStatus”: “NA”,
“paymentMode”: “UPI”,
“txStatus”: “SUCCESS”,
“txTime”: “2020-05-13 09:26:19”,
“customerEmail”: “divyavdprabhu@gmail.com”,
“customerPhone”: “9702080035”,
“customerName”: “Divya Prabhu”,
“orderNote”: “N/A”,
“orderAmount”: “780.00”,
“orderId”: “145023161”,
“id”: “128499598”,
“referenceId”: “128499598”,
“currency”: “INR”,
“txAmount”: “780.00”,
“refundStatus”: “NA”
},
{
“settlementStatus”: “NA”,
“paymentMode”: “NET_BANKING”,
“txStatus”: “SUCCESS”,
“txTime”: “2020-05-12 22:51:19”,
“customerEmail”: “rrdalvi278@gmail.com”,
“customerPhone”: “7304621164”,
“customerName”: “Rohit Dalvi”,
“orderNote”: “N/A”,
“orderAmount”: “350.00”,
“orderId”: “145023126”,
“id”: “128391298”,
“referenceId”: “128391298”,
“currency”: “INR”,
“txAmount”: “350.00”,
“refundStatus”: “NA”
},
{
“settlementStatus”: “NA”,
“paymentMode”: “CREDIT_CARD”,
“txStatus”: “SUCCESS”,
“txTime”: “2020-05-11 12:36:11”,
“customerEmail”: “VISHWANATH.SAWANT69@YAHOO.COM”,
“customerPhone”: “09322236342”,
“customerName”: “VISHWANATH SAWANT”,
“orderNote”: “N/A”,
“orderAmount”: “750.00”,
“orderId”: “145022771”,
“id”: “127635278”,
“referenceId”: “127635278”,
“currency”: “INR”,
“txAmount”: “750.00”,
“refundStatus”: “NA”
}
],
“lastId”: “127635278”,
“status”: “OK”
}

Can you help me with the code to extract the orderId and post them in a loop.

4

I get some array of data using GET function. I want to extract all the orderId from the GET function output and want to use it in a POST function. Is this possible?

{
“message”: “20 transactions fetched”,
“transactions”: [
{
“orderNote”: “N/A”,
“orderAmount”: “350.00”,
“orderId”: “145023126”,

    },
    {
        "orderNote": "N/A",
        "orderAmount": "350.00",
        "orderId": "145023126",
        
    },{
        "orderNote": "N/A",
        "orderAmount": "350.00",
        "orderId": "145022771",
    }
],
"lastId": "127635278",
"status": "OK"

}

TIA. :slight_smile:

5

If you update my code snippet then you’ll be able to extract orderId. Then just create a POST request using the variable you declared.

6

I was trying this out but I’m getting an error at the 2nd request run. I can’t tell what causes the error. Can you please help me?

Screen Shot 2021-01-20 at 4.16.54 PM
Screen Shot 2021-01-20 at 4.16.54 PM2560×1600 417 KB

7

Hi @jechellea seems like semicolon ; is missing in the code snippet. Could you please addin the semicolon after the pm.variables and postman.setNextRequest statements in fi and else part.

1 Like
8

Was able to resolve the previous error. I have a question tho. I have multiple requests needed to be performed, is it possible in this kind of approach? In the given example it only loop through 1 request and I have more.

9

@jechellea Sure, you can use postman.setNextRequest("request_name"); in the pre-request scripts and redirect to different requests every time, for example if you want to loop over 3 requests:
postman.setNextRequest("request_A");
postman.setNextRequest("request_B");
postman.setNextRequest("request_C");
postman.setNextRequest("request_A");

Just make sure you have a condition that will stop the flow eventually (using postman.setNextRequest(null);) or you’ll end up doing an infinite loop.

You’ll find more info in the Learning Center too: https://learning.postman.com/docs/running-collections/building-workflows/

2 Likes
10

Yay! Great. Thanks so much :blush: