Extract data from the json response body

Question

I'm making a postman call to an endpoint and i want to save in a variable only a number from my response body's field.

POST {{baseURL}}/{{version}}/{{customersEndpoint}}

response:
{
    "firstName": "te",
    "lastName": "test",
    "customerUrl": "/api/v1/customers/172"
}

var response = JSON.parse(responseBody)
console.log(response)
console.log(response.customerUrl)

I want to save in a variable only the number 172.

var customerID = response.customerUrl(something) ???

Thanks!

Answer 1

If this is representative of the expected format of customerUrl, you can do:

const customerUrlPieces = response.customerUrl.split('/');
const customerID = customerUrlPieces[customerUrlPieces.length - 1];

Answer 2

You could split the customerUrl string, and get just the number.

response= {
    "firstName": "te",
    "lastName": "test",
    "customerUrl": "/api/v1/customers/172"
}

const customerId = response.customerUrl.split("/")[4]

console.log(customerId)

Answer 3

you can get those numbers by matching them with a RegExp;

response.customerUrl.match(/\d{2,}/)[0]

\d{2,} will check for 2 or more digits in a row