thirdparty/google_appengine/lib/django/tests/modeltests/properties/models.py
author Lennard de Rijk <ljvderijk@gmail.com>
Sun, 12 Jul 2009 12:50:01 +0200
changeset 2608 d97bafb60f0e
parent 109 620f9b141567
permissions -rwxr-xr-x
Renamed tag for latest version to match the app.yaml version entry. Thanks to Madhusudan C.S. for noticing this.

"""
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'
"""}