Primary Contact as Default on Appointments

Hi ​@bobbytherbs, to populate a Customers Primary Contact in the contact field of the settings tab on an appointment by default. Please find the attached code snippet which I used recently.
 

protected void FSAppointment_CustomerID_FieldUpdated(PXCache cache, PXFieldUpdatedEventArgs e)
{
    FSAppointment appointment = e.Row as FSAppointment;
    if (appointment == null || appointment.CustomerID == null)
        return;

    // Retrieve the Customer's Primary Contact
    BAccount baccount = PXSelect<BAccount,
        Where<BAccount.bAccountID, Equal<Required<BAccount.bAccountID>>>>
        .Select(Base, appointment.CustomerID);

    if (baccount?.PrimaryContactID != null)
    {
        // Get the related Service Order record
        FSServiceOrder serviceOrder = PXSelect<FSServiceOrder,
            Where<FSServiceOrder.srvOrdType, Equal<Required<FSServiceOrder.srvOrdType>>,
                  And<FSServiceOrder.refNbr, Equal<Required<FSServiceOrder.refNbr>>>>>
            .Select(Base, appointment.SrvOrdType, appointment.RefNbr);

        if (serviceOrder != null)
        {
            serviceOrder.ContactID = baccount.PrimaryContactID;
            Base.ServiceOrderRelated.Update(serviceOrder);
        }
    }
}

Hope, it helps!