Creating a url encoded request using post script

[satellite-participa8 (SArthak Verma)]

Hi Everyone,
I just started using Postman some time ago. I have encountered an issue that I need some help with.

My question: I have defined an environment variable by the name of “form” whose value is
{“MD”:“someValue”,“PaReq”:“someValue”,“TermUrl”:“someUrlHere”}

I’m trying to set the three values in a new request so that it looks something like this:

I need to do this using the pre-request script as the fields in “form” are not static. I also have to post these details on a URL that I got from a previous request and declared as a variable “url”.
I’ve already tried:
const forms = JSON.parse(pm.environment.get(“form”));
pm.request.body.mode = “urlencoded”;
pm.request.body.urlencoded = forms;

But unable to define any value in the request body. Please suggest.

[michaelderekjones (Mike Jones)]

If you console log the body, you will see that urlencoded is an array of objects and it has a particular format.

console.log(pm.request.body.urlencoded);

You can replace that entire array using the following.

const form = JSON.parse(pm.environment.get("form"));
let MD = form.MD;
let PaReq = form.PaReq;
let TermUrl = form.TermUrl;

let body = [
    {
        "key": "MD",
        "value": MD
    },
    {
        "key": "PaReq",
        "value": PaReq
    },
    {
        "key": "TermUrl",
        "value": TermUrl
    }
]

pm.request.body.urlencoded = body
console.log(pm.request.body.urlencoded) 

[satellite-participa8 (SArthak Verma)]

@michaelderekjones Is there a way of handling this dynamically? As mentioned, the key-value pair in the form is not static.

[michaelderekjones (Mike Jones)]

You will need to save the object in the environment variable in the correct format.

The same as the body I posted.

[{"key":"MD","value":"someValue"},{"key":"PaReq","value":"someValue"},{"key":"TermUrl","value":"someUrlHere"}]