NetSuite / Suitescript - Why does this Validate Field script enter an infinite loop? - validation

Question

My script is entering into an infinite loop and I have no idea why. I am running this on validate field and I am preventing a change to the field if another vendor bill exists with the same reference number, forcing the user to change the "Reference Number" to be unique. Here is my code:
function validateField(type, name) {
if (uniqueReferenceNum(type, name) === false) {
return false;
}
return true;
}
function uniqueReferenceNum(type, name) {
if (name !== 'tranid') {
return true;
}
var tranID = nlapiGetFieldValue('tranid');
var vendor = nlapiGetFieldValue('entity');
var vendorName = nlapiGetFieldText('entity');
var filters = new Array();
var columns = new Array();
filters[0] = new nlobjSearchFilter('entity', null, 'is', vendor);
filters[1] = new nlobjSearchFilter('tranid', null, 'is', tranID);
filters[2] = new nlobjSearchFilter('mainline', null, 'is', 'T');
columns[0] = new nlobjSearchColumn('internalid');
results = nlapiSearchRecord('vendorbill', null, filters, columns);
if (!results) {
return true;
}
alert("There is already a vendor bill with reference # " + tranID + " for " + vendorName + ". Please verify and change the reference number before continuing.");
return false;
}

Answer 1

For those still facing this issue, you can set the field in question - in this case, Reference Number - to a 'falsy' value such as an empty string. Only return false after checking that the field contains a 'truthy' value. Then display the alert or dialog to the user. This should break the validation loop.