I have a question about the customization of a product detail item.

I created an item (API name: field) in the item details and called the item details with a custom function, but the above item (API name: field) could not be called.

Please let me know how to call the item created in the product details item.

《Custom Functions》

resp = zoho.crm.getRecordById("Sales_Orders",Sales_Orderid);

lineitems = ifnull(resp.get("Product_Details"),"");

maeukesubtotal = 0.0;

normalsubtotal = 0.0;

for each  item in lineitems

{

ProductCode = ifnull(item.get("product").get("Product_Code"),"");

info ProductCode;

info item;

if(ProductCode == "MP01" || ProductCode == "MP02")

{

maeukesubtotal = maeukesubtotal + item.get("field");

info maeukesubtotal;

}

else

{

normalsubtotal = normalsubtotal + item.get("field");

info normalsubtotal;

}

}

mp = Map();

mp.put("maeuke_subtotal",maeukesubtotal);

mp.put("normal_subtotal",normalsubtotal);

update = zoho.crm.updateRecord("Sales_Orders",Sales_Orderid,mp);

《message in the console》

情報

R800

{"product":{"Product_Code":"R800","Currency":"JPY","name":"RIKCAD10","id":"3745067000002656873"},"quantity":1,"Discount":0,"total_after_discount":1080000,"net_total":1188000,"book":null,"Tax":108000,"list_price":1080000,"unit_price":1080000,"quantity_in_stock":-71,"total":1080000,"id":"3745067000004716267","product_description":null,"line_tax":[{"percentage":10,"name":"消費税","id":"3745067000002625888","value":108000}]}

関数を実行できませんでした

Null value occurred while performing Addition operation. Line Number:19