Using exists and does not exist with aggregates?

Using Django
1

This would be a queryset

active_event_object = VActiveEvent.objects.filter(calendar_id=date_today)

So I could do something like this to check if the queryset returned anything;

def calendar_criteria(request):
    date_today = timezone.now()
    active_event_object = VActiveEvent.objects.filter(calendar_id=date_today)
    context = {
        'vae_object': active_event_object
    }

    if active_event_object.exists():
        template = 'view2.html'
    else:
        template = 'index.html'
    return render(request, template, context)

But this would be a dict, right?

active_event_object = VActiveEvent.objects.filter(calendar_id=date_today).aggregate(Min('event_priority'))

So if I wanted to check if exists or does not exist would it truly be this simple or is there a better alternative?

if active_event_object:
    not empty ...
else:
    empty ...

EDIT
Testing in the Shell, it looks like you’d actually want to look at;

active_event_object['event_priority__min']

def calendar_criteria(request):
    date_today = timezone.now()
    active_event_object = VActiveEvent.objects.filter(calendar_id=date_today).aggregate(Min('event_priority'))
    context = {
        'vae_object': active_event_object
    }

    if not active_event_object['event_priority__min']:
        template = 'index.html'
    else:
        template = 'view2.html'
    return render(request, template, context)
2

After testing around - it looks like using an aggregate limits you to what is in the dictionary. You no longer have access to the other columns unless you add them in a second time - making this not a solution by itself. I’m going to have to dig in and do some more reading on best way to use these without limiting myself.

EDIT

This answered everything for me.

https://docs.djangoproject.com/en/3.2/topics/db/aggregation/