Automations Script to verify a value output is correct based on Length

[Eddie_Kaeser]

Any assistance would be greatly appreciated! 

I have a Serial Number (SN#) that is labeled "Locker Name". I want to make sure that the SN# is 7 Characters/Digits before finishing the automation as sometimes it get typed in wrong. the SN# format is NS01234 or NS00123. People leave off the 0's from time to time. i want to create a new record with this number in a new table. Linking is not option here. Here is what i am trying to do but i am getting this error: 

TypeError: Cannot read properties of undefined (reading 'length')

at main on line 4     if (sn.length === 5) {     

i guess i am asking how to get the Length of the value to read so that i can achieve this??

let sn = input.config.LockerName;
let updatedSN = '';

if (sn.length === 5) {
updatedSN = 'NS00' + sn.slice(-3);
} else if (sn.length === 6) {
updatedSN = 'NS0' + sn.slice(-4);
} else if (sn.length === 7) {
updatedSN = sn;
} else {
updatedSN = 'Invalid SN#';
}

output.set('updatedSN', updatedSN);

[TheTimeSavingCo · Accepted solution]

Try adding a "()" to your "input.config", so:

let sn = input.config().LockerName;
let updatedSN = '';

if (sn.length === 5) {
updatedSN = 'NS00' + sn.slice(-3);
} else if (sn.length === 6) {
updatedSN = 'NS0' + sn.slice(-4);
} else if (sn.length === 7) {
updatedSN = sn;
} else {
updatedSN = 'Invalid SN#';
}

output.set('updatedSN', updatedSN);

A non scripting alternative could be asking your users to just key in the number and you can add the appropriate prefix via a formula field instead

[Eddie_Kaeser]

Test ran successfully!!!

Thank you so very much! 

~ED~