如何从行表中的库存明细列中获取批号(在Netsuite中)？

var search = search.create({
    type: "inventoryitem",
    columns: ["internalid", "title", "location", "binnumber", "lotnumber"],
    filters: [
        ["isinactive", "is", "F"]
    ]
});

var searchResultCount = search.runPaged().count;
for (var i = 1; i <= searchResultCount; i++) {
    var searchResult = search.run().getRange({
        start: i,
        end: i
    })[0];
    log.debug("Search Result", JSON.stringify(searchResult));
}

/**
 * @NApiVersion 2.x
 * @NScriptType UserEventScript
 */
define(["N/record"], function (record) {
    function beforeSubmit(context) {
        if (context.type === context.UserEventType.CREATE || context.type === context.UserEventType.EDIT) {
            var newRecord = context.newRecord;
            var inventorySublist = newRecord.getSublist({ fieldId: "inventory" });
            for (var i = 0; i < inventorySublist.getLineCount({ sublistId: "inventory" }); i++) {
                var lotNumber = inventorySublist.getCurrentSublistValue({
                    sublistId: "inventory",
                    fieldId: "lotnumber"
                });
                log.debug("Lot Number", lotNumber);
            }
        }
    }

    return {
        beforeSubmit: beforeSubmit
    };
});