Getting the amount of guests in bookings made django

Question

If each a user goes into an event they can make an booking, but each event only has a certain amount of space open.

I would like to show in the event that there are 5 ou

Answer 1

if i correctly understand, you can try

@property
def bookings_total(self):
    return self.bookings_set.filter(bookingstatus='y').count()

@property
def bookings_left(self):
    return self.bookings_total - self.seats

Answer 2

Try:

 events = Events.objects.filter(active='a').\
 filter(Q(date__gte=today)|Q(date=today)).order_by('date')

 events = events.filter(Q(booking__bookingstatus='n')|Q(booking__bookingstatus='p'))
 events = events.annotate(num_of_seats=Count('booking'))

and now you can use, .num_of_seats to show no of seats in an event.

In html file:

{% for event in events %}
      {{event.title}}
      {{even.num_of_seats}}
{% endfor %}