How to create a filter for objects displayed through the ListView?

Question

Django

The ListView displays all objects in the University model.
The University model has a city field.
How to output only university with a specific city value with help?

Answer 1

class UniversityListView(ListView):
    ...
    def get_queryset(self):
        university = University.objects.filter(city='London')
        return university

If a:

class University(models.Model):
    ...
    city = models.ForeignKey('City')
    ...

then

class UniversityListView(ListView):
    ...
    def get_queryset(self):
        city = City.objects.get(name='London')
        university = University.objects.filter(city=city)
        return university

Answer 2

Look at QSortFilterProxyModel.