How can I dynamically default a filtered custom list/record field only when there is one value in the flitered list?

AI generated answer (using internal Slack threads):

To dynamically default a filtered custom list/record field only when there is one value in the filtered list, you can use a client script. Here's a general idea of how you can achieve this: 1. Create a client script and attach it to the record where your custom field is located. 2. In the

pageInit

function of the client script, you can get the count of the options in the custom field. If the count is 1, you can set that value as the default value. Here's a sample code snippet:

javascript
/**
 * @NApiVersion 2.x
 * @NScriptType ClientScript
 */
define(['N/currentRecord'], function(currentRecord) {
    function pageInit(scriptContext) {
        var record = scriptContext.currentRecord;
        var field = record.getField({fieldId: 'customfield'});
        var options = field.getSelectOptions();
        if (options.length === 1) {
            record.setValue({
                fieldId: 'customfield',
                value: options[0].value
            });
        }
    }
    return {
        pageInit: pageInit
    };
});

Please replace

'customfield'

with the actual ID of your custom field. This script will check the number of options in the custom field when the page is loaded. If there is only one option, it will set that option as the default value. ****** Disclaimer: This response was generated by an artificial intelligence assistant based on previous conversations from multiple Slack channels, and may contain inaccuracies or mistakes. ******