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

0 vote330 views1 answer
Make widget span window width tkinter
Python
0 vote267 views1 answer
Dict write python csv file
Python
1 vote348 views2 answers
Create random dataframe pandas
Python
1 vote320 views1 answer
Python how to copy a 2d array leaving out last column
Python
2 votes324 views1 answer
Pandas change last row
Python
0 vote316 views4 answers
Remove french stopwords with spacy
Python
1 vote319 views3 answers
Sequencia de fibonacci python
Python
0 vote344 views1 answer
Pythagoras theorem solver python
Python
1 vote318 views1 answer
Raatatatatatatatatatatatatatatatatatatatatatatatatatatattatana
Python
-2 votes358 views1 answer
3d game in python
Python