Calculating_Deal_amount_with_sum_of_associated_Products_in_Zoho_CRM.js

//Replace the module name with correct API name
product_module_name = "Products";
deals_module_name = "Deals";
//Replace the field API name correctly
product_unit_price_field_name = "Unit_Price";
deals_amount_field_name = "Amount";
//Fetches all product related to a deal from its related list
product_entries = zoho.crm.getRelatedRecords(product_module_name, deals_module_name, deal_id);
//Assign initial value of variable deal_amount as 0
deal_amount = 0;
//Executes only when the product_entries is not empty
if (product_entries != null && product_entries.size() > 0)
{
    for each product in product_entries
    {
        //Executes only when product unit price is not empty
        if (product.get(product_unit_price_field_name) != null && product.get(product_unit_price_field_name) != 0)
        {
            //get the unit price of each products
            product_unit_price = product.get(product_unit_price_field_name);
        }
        //Calculate the total of products and stores the total in the variable deal_amount
        deal_amount = deal_amount + product_unit_price;
    }
}
//Create a map and add the calculated deal amount
update_deal_map = Map();
update_deal_map.put(deals_amount_field_name, deal_amount);
//Update the deal record with map update deal 
update_deal_entry = zoho.crm.updateRecord(deals_module_name, deal_id, update_deal_map);