collectionVariables returns value by reference or by value

[danny-dainton]

Hey @vivek5080-05

Welcome to the Postman Community!

In your first request, it’s using pm.variables.set() which only lives for the duration of that single request. It’s not storing those values in a variable anywhere.

The pm.variables.get() in your second request would go pick the variable with that name, which is in the narrowest scope and use that - It wouldn’t be using anything from the first request.

Store and reuse values using variables | Postman Learning Center

I would personally just stick to using collectionVariables for it all, that way you’re not getting tripped up by the way that pm.variables.get() works in Postman.

This is from a slightly different context but uses the .shift() method in the script that @michaelderekjones shared, It might be worth taking a look at.

Asserting over a dynamic boolean

Here is a basic example of using setNextRequest. I’m running this against Postman Echo with a very basic request body. [image] With the following in the pre-request scripts… if (!pm.collectionVariables.get("booleans")) { pm.collectionVariables.set("booleans", JSON.stringify([])); } let array = JSON.parse(pm.collectionVariables.get("booleans")); if (array.length === 0) { array = [true, false]; } pm.test("boolean array is not empty", () => { pm.expect(array).to.be.an("array").th…