Accessing Collection Variables in Postman

Question

Feature

Postman added support for variables, authorization, pre-request and test scripts to collections. (as of version 5.4.1 this exists at both the collection AND folder level)

Use case

Let's say I want to store a refresh token when the login endpoint is hit. My test script needs to create/update a COLLECTION variable, NOT a global or environment variable.

Once that refresh_token is available to the collection, other tests and pre-request scripts, I would think there is a way to access them through an API similar to pm.environment or pm.globals. (pm.collection, for instance)

Question

I cannot find any documentation on how to access or modify those via pre-request scripts, or tests... does anyone know how to do this? Maybe this hasn't been thought out completely, or not fully implemented, but I thought I would check with others for some help.

Temporary Solution

As a complete hack, I am storing the things I need as namespaced environment variables. It's not ideal (makes things kind of messy when working in other collections) but it works just fine.

Answer 1

Collection variables

You can access collection variables (and all variables) in the pre-request and test script sections using pm.variables.get("variableName").

However, you can only define and update collection variables by editing the collection details via modal.

Note: For your current solution using environment variables getting messy, remember you can always use pm.environment.set() to reset the value or pm.environment.unset() to clear it.