Django manger

# 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 vote111 views1 answer
Example 1: Reset Index & Drop Old Index pandas
Python
0 vote131 views1 answer
"DjangoJSONEncoder" is not defined
Python Django
1 vote124 views1 answer
Error urllib request no attribute
Python
-1 vote127 views1 answer
John cabot
Python
1 vote110 views2 answers
Add item to tuple
Python
0 vote121 views2 answers
Remove element from a list python
Python
11 votes110 views6 answers
Write list to csv python
Python
0 vote112 views1 answer
Free wifi connection disconnects frequently windows 10
Python
2 votes115 views1 answer
Remove a file or dir in linux or mac or ubuntu
Python
0 vote113 views1 answer
File "demo_indentation_test.py", line 2 print("Five is greater than two!") ^ IndentationError: expected an indented block
Python