I have a function which checks the dates and then calculates the arrivals and departures using the data. but there are two problems, the first one is that I need to do this an automatic function so the user doesn't need to click 'update' and I tried to solve this by using this code below:

@api.model
def fields_view_get(self, view_id=None, view_type='form', toolbar=False,
                    submenu=False):
    res = super(HotelReservation, self).fields_view_get(
        view_id=view_id, view_type=view_type, toolbar=toolbar,
        submenu=submenu)

    self.expected_arrivals_departures()

    return res

the only problem with this is that it runs 5 times when I need only 1 time to run my function.

Can someone please help me?