How to Show and Make a Variable Mandatory Based on a Yes/No Selection in a Variable Set?

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JGuerrero0323
Tera Expert

‎03-03-2025 09:55 PM

Hi ServiceNow Community,

I'm trying to achieve the following behaviour in my catalog item:

I have a variable required_by_date, and I want it to be displayed only if the Yes/No variable inside my variable set ("Required Accessories") is selected as YES. Additionally, when it is displayed, it should also be mandatory.

I couldn't find a direct way to achieve this since UI Policies don’t seem to work in this case. I suspect this is because the data is inside a variable set.

Has anyone faced a similar issue? I'd really appreciate a different approach or a workaround to make this work.

I've attached some images for better reference.

Thanks in advance!

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JGuerrero0323
Tera Expert

‎03-19-2025 11:15 PM

I created two catalog client scripts to achieve the desired behaviour. It’s a simple approach, but it works for what I need.

function onChange(control, oldValue, newValue, isLoading) { 
    if (isLoading || newValue == '') {
        return;
    }

    if (newValue == 'Yes') {
        if (this) {
            this.cat_g_form.setVisible('required_by_date', true);
            this.cat_g_form.setMandatory('required_by_date', true);
        }
    }
    if (newValue == 'No') {
        if (this) {
            this.cat_g_form.setVisible('required_by_date', false);
            this.cat_g_form.setMandatory('required_by_date', false);
        }
    }
}

Catalog Client Script (onLoad):

function onLoad() {
    this.cat_g_form = g_form;
}

By using this.cat_g_form = g_form in the onLoad script, I ensured that the g_form object is accessible within the Variable Set script. This is necessary because scripts inside a Multi-Row Variable Set don’t have direct access to g_form by default. Assigning it to this.cat_g_form allows the onChange script to properly reference and manipulate the catalog item fields.

 

 

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PrashantLearnIT
Giga Sage

‎03-03-2025 10:13 PM

Hi @JGuerrero0323 

 

Create UI Policy on catalog item level.

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JGuerrero0323
Tera Expert
In response to PrashantLearnIT

‎03-19-2025 10:55 PM

Hi Prashant,

Creating a UI Policy at the catalog item level wasn’t sufficient. I tried, but it didn’t work as expected. Instead, I used a Client Script to achieve the desired outcome

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Najmuddin Mohd
Mega Sage

‎03-03-2025 10:17 PM

Hello @JGuerrero0323 ,

Why not add the field in the Variable set itself? 


If the above information helps you, Kindly mark it as Helpful and Accept the solution.
Regards,
Najmuddin.


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JGuerrero0323
Tera Expert
In response to Najmuddin Mohd

‎03-19-2025 10:57 PM

If you add the variable inside as you suggest, you would need to select the date for each new row individually. However, the goal is for the required_by_date to be the same for all items within

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