how to filter queryset with foreign key in django

1# *********** how to filter queryset with django foreign keys **********
2
3# in models.py file
4class BookedEvent(models.Model):
5    user = models.ForeignKey(User, on_delete=models.CASCADE)
6    event = models.ForeignKey(Events, on_delete=models.CASCADE)
7
8    
9# in filters.py file
10import django_filters
11class BookedEventFilter(django_filters.FilterSet):
12    class Meta:
13        model = BookedEvent
14        #use __ (double underscore) to target foreign key values
15        fields = ['event__eventName', 'event__startDate','event__endDate','event__address']   
16
17        
18# in views.py file 
19def booked_event_page_view(request):
20   # getting queryset
21    currentUser = request.user
22    bookedEvents = models.BookedEvent.objects.filter(user=currentUser)
23    # adding event filter
24    filter = BookedEventFilter(request.GET, queryset=bookedEvents)
25    bookedEvents = filter.qs
26    context = {'bookedEvents': bookedEvents, 'filter':filter}
27    return render(request, 'booked_events.html', context)