Django manager

# First, define the Manager subclass.
class DahlBookManager(models.Manager):
    def get_queryset(self):
        return super().get_queryset().filter(author='Roald Dahl')

# Then hook it into the Book model explicitly.
class Book(models.Model):
    title = models.CharField(max_length=100)
    author = models.CharField(max_length=50)

    objects = models.Manager() # The default manager.
    dahl_objects = DahlBookManager() # The Dahl-specific manager.

Source: docs.djangoproject.com

Similar codes

1 vote234 views1 answer
Extend stack python
Python
0 vote282 views1 answer
Dataframe groupby rank by multiple column value
Python
0 vote243 views1 answer
Counter python time complexity
Python
0 vote251 views1 answer
Split a string into N equal parts.
Python
5 votes255 views3 answers
Opencv python shrink image
Python
1 vote263 views1 answer
Append attribute ofpython
Python
2 votes238 views2 answers
Django filter and condition
Python
0 vote227 views1 answer
Plt tickpad
Python
0 vote259 views1 answer
Voting classifier with different features
Python
2 votes248 views1 answer
Tensorflow reduce_sum
Python