How to set a default transaction line field to mandatory? example: Name line filed in Journal transaction?

AI generated answer (using internal Slack threads):

To set a default transaction line field to mandatory, such as the Name line field in a Journal transaction, you will need to use a client script. Unfortunately, NetSuite does not provide a built-in way to make line fields mandatory through the UI, so scripting is the only option. Here is a basic example of how you might accomplish this using SuiteScript:

javascript
/**
 * @NApiVersion 2.x
 * @NScriptType ClientScript
 */
define(['N/ui/dialog'], function(dialog) {
    function saveRecord(context) {
        var currentRecord = context.currentRecord;
        var lineCount = currentRecord.getLineCount({sublistId: 'line'});
        for (var i = 0; i < lineCount; i++) {
            var name = currentRecord.getSublistValue({sublistId: 'line', fieldId: 'name', line: i});
            if (!name) {
                dialog.alert({
                    title: 'Error',
                    message: 'Name field is mandatory on line ' + (i + 1)
                });
                return false;
            }
        }
        return true;
    }
    return {
        saveRecord: saveRecord
    };
});

This script checks each line of the transaction for a value in the 'name' field. If it finds a line where the 'name' field is empty, it shows an error message and prevents the record from being saved. Please note that you will need to deploy this script to the appropriate record type and form. ****** Disclaimer: This response was generated by an artificial intelligence assistant based on previous conversations from multiple Slack channels, and may contain inaccuracies or mistakes. ******