thirdparty/google_appengine/lib/django/tests/modeltests/properties/models.py
author Madhusudan.C.S <madhusudancs@gmail.com>
Mon, 24 Aug 2009 20:08:35 +0530
changeset 2789 259ce59acaf7
parent 109 620f9b141567
permissions -rwxr-xr-x
Changed GHOPComment model to inherit from base model. All the properties are specific to the GHOPComment model. The GHOPComment model is also made ID based. Changes changes property from StringProperty to StringListProperty.

"""
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'
"""}