Set multiple collection variables from an array

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1

Bit of newbie here , so need some help from Postman experts out there :slight_smile: ,

Trying to achieve: as part of my tear down, I’m trying to set “NULL” / BLANK for all the existing collection variables.

Problem: tried 2 logics but both of them DO NOT set any of the collection variables to NULL / BLANK.

Logic#1:

// getting all collection variables
const allCollVariables = pm.collectionVariables.values.map(function(variable) {return variable.key; });

// filtering out base_url variable
const excludeBaseURL = allCollVariables.filter(function(variable) {        
             return !variable.toLowerCase().includes("base_url"); });
 
// clearing all the remaining variables
        return excludeBaseURL.forEach(function(variableName) {
           pm.collectionVariables.set(variableName, null); });

Logic#2:

// getting all collection variables
const allCollVariables = pm.collectionVariables.values.map(function(variable) {return variable.key; });

// filtering out base_url variable
const excludeBaseURL = allCollVariables.filter(function(variable) {        
             return !variable.toLowerCase().includes("base_url"); });
 
// clearing all the remaining variables
for (var i = 0; i < excludeBaseURL.length; i++) {
                pm.collectionVariables.set(excludeBaseURL[i], null);
        }

Note: I tried using " " instead of null, but it didn’t work…

Can someone please help me out here !

2

Hey @koustubh24 :wave:

Welcome to the Postman Community! :postman:

Could you something like this to set them to a blank value?

const resetCollectionVars = (prefix) => {
    const variableKeys = Object.keys(pm.collectionVariables.toObject());
    variableKeys.forEach((arrItem) => {
        if (!arrItem.startsWith(`${prefix}`)) {
            pm.collectionVariables.set(arrItem, "");
        }
    });
}

resetCollectionVars("base_url");
3

thank you @danny-dainton for that… I copied that in the Collection > Post-response script and tried referencing in one of the request’s Post-response script but it didn’t work … is there a particular way to reference it?

4

There are a few ways but I would recommend using the Package Library to add the script.

1 Like
5

Thank you @danny-dainton

6

Unfortunately, can’t see the “Package” option in my Postman (v11.16.1).

7

Is that not here?

17289370633023457250723877415404
172893706330234572507238774154041610×522 87.4 KB

Do you have this in a Public Workspace?

8

I’m using a “shared-workspace” with just 1 other tester & this is what I see. …

image
image1499×651 68.3 KB

9

I can’t see the Workspace visibility from that image.

The package library was added for v11 so it would be part of your version.

The only way it wouldn’t be showing is if you’re working in a Public Workspace.

10

sorry about that, but here is a “private” workspace of mine & I still can’t see the package options …
Collection:

image
image1884×921 77 KB

Workspace settings:

image
image1029×246 9.46 KB

1 Like
11

That’s strange, if you’re using V11 and not in a Public Workspace, you should see that.

Could you share more details about your OS and other environment setup, please?

12

In the meantime, you could use the same method here to reuse the scripts in your Collection.

https://www.postman.com/postman/postman-answers/collection/xz5vqwi/using-global-utility-functions?action=share&source=copy-link&creator=1794236

Store as a Global Variable:

utils = {
    resetCollectionVars: (pm, prefix) => {
        const variableKeys = Object.keys(pm.collectionVariables.toObject());
        variableKeys.forEach((arrItem) => {
            if (!arrItem.startsWith(`${prefix}`)) {
                pm.collectionVariables.set(arrItem, "");
            }
        });
    }
};

In your script:

eval(pm.globals.get("utils"));

utils.resetCollectionVars(pm, 'base_url')

This is a workaround but I would recommend using the Package Library once we sort out what’s happening there.

13

Thank you @danny-dainton for that solution. As for the details, they’re as follows:

OS = Windows 10 Enterprise & I’m behind a secure firewall (Zscaler).

14

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