How do i get a specific data from responseBody on postman - json

Question

I'm trying to set an environment variable using the following:
var data = JSON.parse(responseBody);
pm.environment.set("petId", data.id);
And this is what is in my response:
{
"id": 9222999990497629102,
"category": {
"id": 0,
"name": "dog"
},
"name": "Brutus",
"photoUrls": [
"http://placeimg.com/640/480"
],
"tags": [
{
"id": 0,
"name": "string"
}
],
"status": "available"
}
But somehow my environment looks like this:
"petId": "9222999990497629000"
I don't where from where I'm getting these last zeros on my variable.

Answer 1

pm.environment.set("petId", JSON.parse(pm.response.text().replace(/"id":[\s]*([\d]+),/,'"id":"$1",')).id);
As the id is a big int greator than MAX_SAFE_Integer , the response will be rounded when parsed as JSON. It is a javascript behavior.
You can enclose it with double quotes. After that extract that id.
now if you want to convert id to number use BigInt
let id = JSON.parse(pm.response.text().replace(/"id":[\s]*([\d]+),/,'"id":"$1",')).id
id = BigInt(id)
console.log(id)
Reference: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/MAX_SAFE_INTEGER
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/BigInt