nsmockup/lib/nsfunc/sublist-api/get-line-item-value.js

Test your Suitescripts before deploying to NetSuite

'use strict';
var $metadata = require('../../db-utils/metadata'),
    $sublist = require('../../ctx-utils/sublist');

exports.$$hook = true;

exports.nlapiGetLineItemValue = (ctx) => {

    /**
     * Return the value of a sublist field on the current record on a page.
     * @restriction supported in client and user event scripts only.
     * @param {string}    type sublist name
     * @param {string}    fldnam sublist field name
     * @param {int}    linenum line number (1-based)
     * @return {string}
     *
     * @since 2005.0
     */
    return (type, fldnam, linenum) => {
        let $this = ctx.$$THIS_RECORD || {},
            recType = $this.recordType;
        $metadata.existsSubList(recType, type);

        let recSubType = $sublist.dbName($this, type),
            query = {_index: linenum},
            record = $db(recSubType).chain().where(query).value(),
            line = Array.isArray(record) ? record[0] : record;

        if (line && line[fldnam]) {
            let value = line[fldnam];
            return '' + value;
        } else {
            return null;
        }
    };
};