Add request body in pre-request script based on the Environmental values

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,
1

Based on the Environment variable(conditionally) Option A, B, or C, I have to take a different request. How to achieve that?

option A:

{
    "profile": {
        "firstname": "firstname",
        "lastname": "lastname",
	    **"mobile" : "{{mobile}}"**
    }
}

option c:

{
    "profile": {
        "firstname": "firstname",
        "lastname": "lastname",
        **"email": "{{email}}",**
       **"mobile" : "{{mobile}}"**
    }
}

Option B:

{
    "profile": {
        "firstname": "firstname",
        "lastname": "lastname",
        **"email": "{{email}}"**
    }
}

Note: Just the request body is dynamic based on the Environment variable. Hader/URL/method remains the same.

Appreciated your help

2

What are the conditions that need to be met, which decide what goes into the request body?

Just as a rough example with a basic condition:

let reqBody = {
    "profile": {
        "firstname": "firstname",
        "lastname": "lastname"
    }
}

let num = 1;

if(num === 1) {
    reqBody.profile.mobile = "{{email}}"
} else {
    reqBody.profile.email = "{{email}}"
    reqBody.profile.mobile = "{{mobile}}"
}

pm.variables.set("reqBody", JSON.stringify(reqBody))

Then add the {{reqBody}} variable in the Body tab.

3

This is what i have it for pre-request:

 var testData = pm.environment.get("testData");

if (testData === 'A') {
let savedData = JSON.stringify({"iamProfile":{"firstname": "testfirst","lastname":"testlast","autoGeneratedFlag":true,"pin": "{{encryptedText}}","iamemail":"{{emailParam}}"}});
pm.environment.set("savedData", savedData);

 //   postman.setNextRequest(null);
} else 
 if (testData === 'B') {
let savedData = JSON.stringify({"iamProfile":{"firstname": "testfirst","lastname":"testlast","autoGeneratedFlag":true,"pin": "{{encryptedText}}","msisdn":"{{msisdn}}"}});
pm.environment.set("savedData", savedData);
  //  postman.setNextRequest("Second Request");
} else 
   {
let savedData = JSON.stringify({"iamProfile":{"firstname": "testfirst","lastname":"testlast","autoGeneratedFlag":true,"pin": "{{encryptedText}}"}});
pm.environment.set("savedData", savedData);
     
 }

Body:

{{savedData}}

Environmental variable:

testData: A

The above piece of code works. As an expert advice was it right or what is the alternative way?