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 vote282 views1 answer
Semicircle
Python
0 vote305 views1 answer
Raising a new style class which doesn't inherit from baseexception python
Python
1 vote313 views1 answer
Remove the Unnamed column in pandas
Python
0 vote314 views1 answer
How to download a project from pythonanywhere
Python
0 vote311 views1 answer
Calling function whose name is in a variable
Python
12 votes322 views1 answer
Append a line to a text file python
Python
0 vote309 views1 answer
How i dynamically populate to CORS_ALLOWED_ORIGINS in django rest framework
Python
0 vote308 views1 answer
Number of spaes pythopn
Python
0 vote284 views2 answers
What is the tracing output of the code below x=10 y=50 if(x**2> 100 and y <100): print(x,y)
Python
29 votes335 views5 answers
List comprehension python if else
Python