13. Adding hooks before/after saving and deleting

Model source code

from django.core import meta

class Person(meta.Model):
    first_name = meta.CharField(maxlength=20)
    last_name = meta.CharField(maxlength=20)

    def __repr__(self):
        return "%s %s" % (self.first_name, self.last_name)

    def _pre_save(self):
        print "Before save"

    def _post_save(self):
        print "After save"

    def _pre_delete(self):
        print "Before deletion"

    def _post_delete(self):
        print "After deletion"

API reference

Person objects have the following methods:

• delete()
• save()

Sample API usage

This sample code assumes the above model has been saved in a file examplemodel.py.

>>> from django.models.examplemodel import persons

>>> p1 = persons.Person(first_name='John', last_name='Smith')
>>> p1.save()
Before save
After save

>>> persons.get_list()
[John Smith]

>>> p1.delete()
Before deletion
After deletion

>>> persons.get_list()
[]