Add value of an MRV field

[jkelvynsant]

Hello, community! I'm trying to sum variables (Value) within MRV and send that sum to a variable (Sum) outside of MRV. 

I developed this client script within the record producer, but it's not working:

function onChange(control, oldValue, newValue, isLoading) {
    if (isLoading) {
        return;
    }

    var mrvsRows = g_form.getValue("nota_fiscal");
    if (!mrvsRows) {
        g_form.setValue("sum", 0);
        return;
    }

    var rows = JSON.parse(mrvsRows);
    var sum = 0;

    for (var i = 0; i < rows.length; i++) {
        var cost = rows[i]["value"];
        if (cost) {
            sum += parseFloat(cost) || 0;
        }
    }


    g_form.setValue("sum", sum);
}

[Ankur Bawiskar · Accepted solution]

@jkelvynsant 

this link has approach and you can enhance

Populate field outside MRVS with a total sum of fields inside MRVS 

If my response helped please mark it correct and close the thread so that it benefits future readers.