thirdparty/google_appengine/lib/django/tests/modeltests/properties/models.py
author Sverre Rabbelier <srabbelier@gmail.com>
Sat, 13 Dec 2008 12:49:11 +0000
changeset 729 7fe218e3d359
parent 109 620f9b141567
permissions -rwxr-xr-x
Make checkIsMyInvitation use Django to parse the URL Using django is more reliable and makes the code easier to read as there is no knowledge of the url layout required. Patch by: Sverre Rabbelier

"""
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'
"""}