Postman: Is it possible to update url of postman request in the pre-requisite script

Question

Is it possible to update url of postman request in the pre-requisite script. I want to edit the url based on dynamic environment input.

For example:

if (environment.someValue) {
    request.url = request.url + "\" + environment.someValue
    if (environment.anotherValue) {
        request.url = request.url + "\" + environment.anotherValue
    }
}

console.log(request.url);

The above code gives me prefect console log:

e.g. if url is https://someServer/someRequest, environment.someVar is x and environment.anotherVar is y the console.log(request.url) above prints:

https://someServer/someRequest/x/y

But the problem is (say if i am requesting a Get), even after logging the overridden request url, it only calls https://someServer/someRequest and does not override to https://someServer/someRequest/x/y.

Any ideas how to modify the url as asked above.

Answer 1

if your url in your request is set as a global, it should work. ie. I have a get request :

GET http://{{myurl}}/etc. with myurl set as a global variable

In my prerequest script I do pm.globals.set("myurl", <new url>);

when I launch my request, it tries to do the GET request on my new url.

So it is possible to do it but you have to use global or environment variables to dynamically update your request:

set your 'someRequest' as a global that you can update in your prescript (instead of request.url), then it will be interpreted when you launch your request

https://someServer/{{someRequest}}