Setting field to null based on true/false field

[carlocsa]

Hi ServiceNow Gurus,

In have 2 fields:

u_field_a is a text field, u_field_b is a true/false field

by default, u_field_a contains a value (ex. "string") and u_field_b is true

what i want to achieve is to clear u_field_a when u_field_b is set to false.

please help.

thank you very much.

Carlo

[Jon Barnes]

You can create a new Business rule for this. You can do it without scripting.

Set the Filter Condition in your BR to u_field_b Changes to false

In the Actions tab, use set Field Values to set u_field_a to blank.

Tick the insert and update boxes and save your BR. this should give you what you want.

[Ujjawal Vishnoi · Accepted solution]

Hi Carlo,

You can also use onChange client script for field u_field_b if you want to clear the field a as soon as we change the field b to true.Please refer screenshot below.

script-----

function onChange(control, oldValue, newValue, isLoading, isTemplate) {
if (isLoading || newValue === '') {
return;
}
if(newValue=='false')
g_form.setValue('u_field_a','');

}

Hope this helps.

Regards

Ujjawal

[carlocsa]

thanks! this is exactly my code except my "false" was not inside ''.

[Jon Barnes]

Doing an onchange client script is fine, but I would also recommend creating the business rule as well. The reason is because sometimes people will update that field outside a form, and in those cases, your client script won’t fire. So my best practice is to put logic like this in a BR, and then “back it up” with a client script if you want immediate feedback