Issue with “Type” while Loading the Item Record

The common problem facing during the loading of item records is with the item type. Items must be qualified by type before performing conventional record operations. A quick function that illustrates the lookups needed to know the item type and the equivalent load record operation.

function loadItemRecord(id){
var CONST_ITEMTYPE = {
'Assembly' : 'assemblyitem',
'Description' : 'descriptionitem',
'Discount' : 'discountitem',
'GiftCert' : 'giftcertificateitem',
'InvtPart' : 'inventoryitem',
'Group' : 'itemgroup',
'Kit' : 'kititem',
'Markup' : 'markupitem',
'NonInvtPart' : 'noninventoryitem',
'OthCharge' : 'otherchargeitem',
'Payment' : 'paymentitem',
'Service' : 'serviceitem',
'Subtotal' : 'subtotalitem'
};    

try {
        return record.load({
            type: CONST_ITEMTYPE[search.lookupFields({
                type: "item",
                id: id,
                columns: ["type"]
            }).type[0].value],
            id: id
        });
    }
    catch(e) {
        console.log('ERROR - loadItem failed with error: id:' + id, e.message)
    };
};