ListView queryset issue

[Dmitrij Strelnikov]

Hi guys,
is this intentional behaviour or not?

class SomeQuerySet(models.QuerySet):
    def active(self):
        print('active')
        data = cache.get(CACHE_KEY)
        if data is None:
            print('no cache')
            data = self.select_related('related').filter(date_expired__gte=timezone.localtime().now()).filter(
                some__is_active=True).order_by('-date_activated')
            cache.set(CACHE_KEY, data, 30)
        return data

class QSSomeListView(ListView):
    queryset = Some.objects.active()

class GetQSSomeListView(ListView):
    def get_queryset(self): 
        return Some.objects.active()

QSSomeListView never print anything from active() method on page access, and actually never hit cache. It print only active once at project startup.

GetQSSomeListView works as expected.

If its intentional, could you please explain / point me why so?
Thank you.

[Carlton Gibson]

Please don't use the issue tracker as a secondary support channel. See TicketClosingReasons/UseSupportChannels.

[Dmitrij Strelnikov]

Carlton, so you are telling this behaviour is not a bug?
It's not support question, if so I would use stack overflow instead.
Thanks

[Claude Paroz]

No, it's not a bug in Django. It's related to your active() method not being lazily evaluated. Please follow Carlton's advice.

[Dmitrij Strelnikov]

thank you Claude, this was the thing I need to hear
have a great day