how can I set my custom transaction line field to mandatory?

AI generated answer (using internal Slack threads):

To set a custom transaction line field to mandatory, you will need to use a client script. Unfortunately, NetSuite does not provide a built-in way to make line level fields mandatory. Here is a general outline of how you can accomplish this: 1. Create a client script record in NetSuite (Customization > Scripting > Scripts > New > Client Script). 2. In the script file, you will need to use the

validateLine

or

validateInsert

function. These functions are triggered when a line is added or edited in a sublist. 3. In the function, you can check if your custom field is filled. If it's not, you can display an error message and return false to prevent the line from being added or saved. Here is a simple example of how the script might look:

javascript
/**
 * @NApiVersion 2.x
 * @NScriptType ClientScript
 */
define([], function() {
    function validateLine(context) {
        var currentRecord = context.currentRecord;
        var sublistName = context.sublistId;

        if (sublistName === 'item') { // replace 'item' with your sublist id
            var customFieldValue = currentRecord.getCurrentSublistValue({
                sublistId: sublistName,
                fieldId: 'custcol_your_custom_field' // replace with your custom field id
            });

            if (!customFieldValue) {
                alert('Please fill in the custom field.');
                return false;
            }
        }

        return true;
    }

    return {
        validateLine: validateLine
    };
});

Remember to replace

'custcol_your_custom_field'

with the actual ID of your custom field and

'item'

with the ID of your sublist. After you've created and deployed the script, it will check the custom field every time a line is added or edited, and prevent the action if the field is not filled. ****** Disclaimer: This response was generated by an artificial intelligence assistant based on previous conversations from multiple Slack channels, and may contain inaccuracies or mistakes. ******