django manger

1# First, define the Manager subclass.
2class DahlBookManager(models.Manager):
3    def get_queryset(self):
4        return super().get_queryset().filter(author='Roald Dahl')
5
6# Then hook it into the Book model explicitly.
7class Book(models.Model):
8    title = models.CharField(max_length=100)
9    author = models.CharField(max_length=50)
10
11    objects = models.Manager() # The default manager.
12    dahl_objects = DahlBookManager() # The Dahl-specific manager.
13