How to Programmatically Retrieve Custom List Values in NetSuite SuiteScript 2.x

Even though a custom list does not behave like a standard record, its values can be retrieved programmatically using the N/search module in SuiteScript 2.x. To obtain a list of custom list values, perform a search on the custom list's internal ID and specify 'name' as a search column to retrieve the display value. The following SuiteScript 2.x code demonstrates how to retrieve and map the names and internal IDs of entries from a custom list, using customlist_ehf_category as an example:

javascript
/**
 * @NApiVersion 2.x
 * @NModuleScope SameAccount
 */
define(['N/search'], function(search) {
    // This code snippet would typically be placed within a SuiteScript 2.x script entry point (e.g., execute, onRequest)
    // or a custom module function.

    var customListId = 'customlist_ehf_category'; // Replace with your custom list's internal ID

    var results = [];
    search.create({
        type: customListId,
        columns: [
            search.createColumn({name: 'name'}),
            search.createColumn({name: 'internalid'})
        ]
    }).run().each(function(result) {
        results.push(result);
        return true; // Return true to continue the iteration
    });

    var names = results.map(function(result) {
        return result.getValue({name: 'name'});
    });

    var ids = results.map(function(result) {
        return result.getValue({name: 'internalid'});
    });

    // The 'names' and 'ids' arrays now contain the respective values from the custom list.
    // For demonstration, you might log them:
    // log.debug('Custom List Names', names);
    // log.debug('Custom List IDs', ids);
});

This script first defines the N/search module, then creates and executes a search on the specified custom list type, collecting all results. Finally, it uses the map function to extract the display names and internal IDs into separate arrays.