thirdparty/google_appengine/lib/django/tests/modeltests/properties/models.py
author Todd Larsen <tlarsen@google.com>
Wed, 01 Oct 2008 00:45:30 +0000
changeset 224 35bf48c27eb6
parent 109 620f9b141567
permissions -rwxr-xr-x
Hide PolyModel inheritance_line bookkeeping property from the User Profile form.

"""
22. Using properties on models

Use properties on models just like on any other Python object.
"""

from django.db import models

class Person(models.Model):
    first_name = models.CharField(maxlength=30)
    last_name = models.CharField(maxlength=30)

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

    def _set_full_name(self, combined_name):
        self.first_name, self.last_name = combined_name.split(' ', 1)

    full_name = property(_get_full_name)

    full_name_2 = property(_get_full_name, _set_full_name)

__test__ = {'API_TESTS':"""
>>> a = Person(first_name='John', last_name='Lennon')
>>> a.save()
>>> a.full_name
'John Lennon'

# The "full_name" property hasn't provided a "set" method.
>>> a.full_name = 'Paul McCartney'
Traceback (most recent call last):
    ...
AttributeError: can't set attribute

# But "full_name_2" has, and it can be used to initialise the class.
>>> a2 = Person(full_name_2 = 'Paul McCartney')
>>> a2.save()
>>> a2.first_name
'Paul'
"""}