<?xml version="1.0"?>
<data><div name="button_box" position="inside">
                <button name="action_view_attendee_list" type="object" class="oe_stat_button" icon="fa-users" invisible="attendee_count == 0">
                    <field name="attendee_count" widget="statinfo" string="Attendees"/>
                </button>
            </div>
            <xpath expr="//field[@name='order_line']//form//field[@name='product_id']" position="after">
                <field name="event_id" domain="[                         ('event_ticket_ids.product_id','=', product_id),                         ('date_end','&gt;=',time.strftime('%Y-%m-%d 00:00:00')),                         '|', ('company_id', '=', False), ('company_id', '=', parent.company_id)                     ]" invisible="service_tracking != 'event'" required="service_tracking == 'event'" options="{'no_open': True, 'no_create': True}"/>
                <field name="event_slot_id" domain="[('event_id','=', event_id)]" invisible="not is_multi_slots or service_tracking != 'event'" required="is_multi_slots and service_tracking == 'event'" options="{'no_open': True, 'no_create': True}"/>
                <field name="event_ticket_id" domain="[                         ('event_id', '=', event_id), ('product_id','=',product_id),                          '|', ('company_id', '=', False), ('company_id', '=', parent.company_id)                     ]" invisible="service_tracking != 'event' or not event_id" required="service_tracking == 'event' and event_id" options="{'no_open': True, 'no_create': True}"/>
            </xpath>
            <xpath expr="//field[@name='order_line']//list//field[@name='product_template_id']" position="after">
                <field name="event_id" column_invisible="True" domain="[                         ('event_ticket_ids.product_id','=', product_id),                         ('date_end','&gt;=',time.strftime('%Y-%m-%d 00:00:00')),                         '|', ('company_id', '=', False), ('company_id', '=', parent.company_id)                     ]" required="service_tracking == 'event'" options="{'no_open': True, 'no_create': True}" placeholder="All Events"/>
                <field name="event_slot_id" column_invisible="True" domain="[('event_id','=', event_id)]" required="is_multi_slots and service_tracking == 'event'" options="{'no_open': True, 'no_create': True}"/>
                <field name="event_ticket_id" column_invisible="True" domain="[                         ('event_id', '=', event_id), ('product_id','=',product_id),                          '|', ('company_id', '=', False), ('company_id', '=', parent.company_id)                     ]" required="service_tracking == 'event' and event_id" options="{'no_open': True, 'no_create': True}"/>
            </xpath>
        </data>