how to lock addition of a line in an existing transaction

AI generated answer (using internal Slack threads):

To lock the addition of a line in an existing transaction, you can use a client script or a user event script in NetSuite. In a client script, you can use the

validateLine

function to check if the transaction is approved. If it is, then return false to prevent the addition of a new line. Here is a sample code:

javascript
function validateLine(type) {
    if (nlapiGetFieldValue('status') == 'Approved') {
        return false;
    }
    return true;
}

In a user event script, you can use the

beforeSubmit

function to check if the transaction is approved. If it is, then throw an error when a new line is added. Here is a sample code:

javascript
function beforeSubmit(type) {
    if (type == 'edit' || type == 'create') {
        var record = nlapiGetNewRecord();
        if (record.getFieldValue('status') == 'Approved') {
            var lineCount = record.getLineItemCount('item');
            if (lineCount > nlapiGetOldRecord().getLineItemCount('item')) {
                throw nlapiCreateError('ADD_LINE_ERROR', 'Cannot add a line to an approved transaction', true);
            }
        }
    }
}

Please note that these scripts are just examples and may need to be adjusted to fit your specific needs. Also, the 'status' field and its value 'Approved' are just placeholders. You will need to replace them with the actual field id and value that represent an approved transaction in your NetSuite account. ****** Disclaimer: This response was generated by an artificial intelligence assistant based on previous conversations from multiple Slack channels, and may contain inaccuracies or mistakes. ******