Resolved: How to filter Django Model instances based on a function defined inside the model?

class Catalogue(models.Model):<br />
    name = models.CharField(max_length=256)<br />
    owner = models.ForeignKey(User, on_delete=models.CASCADE)<br />
    end_date = models.DateTimeField()</p>
<p>    def auction_status(self):<br />
        now = timezone.now()<br />
        return now < self.end_date
[/code]

</p>



In a class view i want to filter only those instances where the auction_status is true.
Something along the lines of :<br> 


<p>[code]class AuctionOverView(ListView):<br />
    model = Catalogue<br />
    template_name = 'administration/catalogue.html'</p>
<p>    def get_queryset(self):<br />
        try:<br />
            return Catalogue.objects.filter(auction_status=False)<br />
        except:<br />
            raise Http404()

return Catalogue.objects.filter(end_date__lt=timezone.now())