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"""
13. Adding hooks before/after saving and deleting
Django provides hooks for executing arbitrary code around ``save()`` and
``delete()``. Just add any of the following methods to your model:
* ``_pre_save()`` is called before an object is saved.
* ``_post_save()`` is called after an object is saved.
* ``_pre_delete()`` is called before an object is deleted.
* ``_post_delete()`` is called after an object is deleted.
"""
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_TESTS = """
>>> 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()
[]
"""
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