Django save methods

.save() in django

>>> one_entry = Entry.objects.get(pk=1)

Source: docs.djangoproject.com

.save() in django


from __future__ import print_function
from django.db import models
from django.db.models import signals
from django.db.models.signals import pre_save, post_save
from django.dispatch import receiver

__author__ = 'sobolevn'

class CustomManager(models.Manager):
    def get_queryset(self):
        super_query = super(models.Manager, self).get_queryset()
        print('Manager is called', super_query)
        return super_query


class ExtraObject(models.Model):
    name = models.CharField(max_length=30)

    def __unicode__(self):
        return self.name


class TestModel(models.Model):

    name = models.CharField(max_length=30)
    key = models.ForeignKey('ExtraObject')
    many = models.ManyToManyField('ExtraObject', related_name='extras')

    objects = CustomManager()

    def save(self, *args, **kwargs):
        print('save() is called.')
        super(TestModel, self).save(*args, **kwargs)

    def __unicode__(self):
        # Never do such things (access by foreing key) in real life,
        # because it hits the database.
        return u'{} {} {}'.format(self.name, self.key.name, self.many.count())


@receiver(pre_save, sender=TestModel)
@receiver(post_save, sender=TestModel)
def reicever(*args, **kwargs):
    print('signal dispatched')

Source: nullorempty.org

Similar codes

0 vote202 views1 answer
Python how to get current line number
Python
3 votes215 views2 answers
Variance calculation python manually
Python
79 votes184 views6 answers
String reverse in python
Python
-1 vote201 views1 answer
How to make a variable in python 3
Python
14 votes197 views3 answers
Flask link stylesheet
Python
0 vote192 views1 answer
Change matplotlib fontsize
Python
0 vote289 views1 answer
Print the multiple data types in a single program in list data structures
Python
0 vote197 views1 answer
Rnadom number python
Python
85 votes194 views6 answers
How to create virtual environment
Python
-1 vote194 views1 answer
Django migrate not creating tables
Python