1 """

     2 22. Using properties on models

     3 

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

     5 """

     6 

     7 from django.db import models

     8 

     9 class Person(models.Model):

    10     first_name = models.CharField(maxlength=30)

    11     last_name = models.CharField(maxlength=30)

    12 

    13     def _get_full_name(self):

    14         return "%s %s" % (self.first_name, self.last_name)

    15 

    16     def _set_full_name(self, combined_name):

    17         self.first_name, self.last_name = combined_name.split(' ', 1)

    18 

    19     full_name = property(_get_full_name)

    20 

    21     full_name_2 = property(_get_full_name, _set_full_name)

    22 

    23 __test__ = {'API_TESTS':"""

    24 >>> a = Person(first_name='John', last_name='Lennon')

    25 >>> a.save()

    26 >>> a.full_name

    27 'John Lennon'

    28 

    29 # The "full_name" property hasn't provided a "set" method.

    30 >>> a.full_name = 'Paul McCartney'

    31 Traceback (most recent call last):

    32     ...

    33 AttributeError: can't set attribute

    34 

    35 # But "full_name_2" has, and it can be used to initialise the class.

    36 >>> a2 = Person(full_name_2 = 'Paul McCartney')

    37 >>> a2.save()

    38 >>> a2.first_name

    39 'Paul'

    40 """}