1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
|
"""
13. Adding hooks before/after saving and deleting
To execute arbitrary code around ``save()`` and ``delete()``, just subclass
the methods.
"""
from django.db import models
class Person(models.Model):
first_name = models.CharField(max_length=20)
last_name = models.CharField(max_length=20)
def __unicode__(self):
return u"%s %s" % (self.first_name, self.last_name)
def save(self, force_insert=False, force_update=False):
print "Before save"
# Call the "real" save() method
super(Person, self).save(force_insert, force_update)
print "After save"
def delete(self):
print "Before deletion"
super(Person, self).delete() # Call the "real" delete() method
print "After deletion"
__test__ = {'API_TESTS':"""
>>> p1 = Person(first_name='John', last_name='Smith')
>>> p1.save()
Before save
After save
>>> Person.objects.all()
[<Person: John Smith>]
>>> p1.delete()
Before deletion
After deletion
>>> Person.objects.all()
[]
"""}
|
