How to autopopulate choice if there is single value in reference field

[Samiksha2]

Hi All,

I have created two fields,
Account- Reference
Platform- Reference

Based on Account Platform is giving user to select the record.
But if there is a single record in the Platform then it should be autopopulate.

I tried the below client script on change of Account

function onChange(control, oldValue, newValue, isLoading, isTemplate) {
    if (isLoading || newValue === '') {
        return;
    }
    var custReq = g_form.getElement('u_platform');
    alert(custReq);
    if (custReq.options.length == 1) {
        g_form.setValue('u_platform', custReq.options[0].value);

    }

}

But it is throwing error "onChange script error: TypeError: Cannot read properties of undefined (reading 'length') function () { [native code] } "

Please help in this.

Thanks,
Sam

[Mark Roethof]

@Yashsvi Don't forget to apply best practices and with that the second parameter on reference fields/variables!

[Yashsvi]

@Mark Roethof, 

yes, will remember this from now on.👍 

Thank you.

[Samiksha2]

Hi @Yashsvi ,

I tried it is not working.

Thanks,
Sam