[Django]-Filter on prefetch_related in Django

It is very simple method which is hardly comparable with those app, but hope you will find it useful:

class Author(models.Model):
    name = models.CharField(max_length=100)

    def latest_book(self):
        return max(self.book_set.all(), key=lambda book: book.created)

authors = Author.objects.prefetch_related('book_set')
authors[0].latest_book() #  what you wanted

Yes, it can be done in this way :

authors=Author.objects.prefetch_related('book_set')

If you want to filter by an attribute(name) present in Author model you can simply filter it by writing:

authors.filter(name='your_value')

But if you want to apply filter on the Books model you have to write the following way:

authors.filter(book__created__gt='your_date')

This will filter all the books that have create date(created attribute in the Book module) greater than your date.