1 """

     2 8. get_latest_by

     3 

     4 Models can have a ``get_latest_by`` attribute, which should be set to the name

     5 of a ``DateField`` or ``DateTimeField``. If ``get_latest_by`` exists, the

     6 model's manager will get a ``latest()`` method, which will return the latest

     7 object in the database according to that field. "Latest" means "having the date

     8 farthest into the future."

     9 """

    10 

    11 from django.db import models

    12 

    13 class Article(models.Model):

    14     headline = models.CharField(max_length=100)

    15     pub_date = models.DateField()

    16     expire_date = models.DateField()

    17     class Meta:

    18         get_latest_by = 'pub_date'

    19 

    20     def __unicode__(self):

    21         return self.headline

    22 

    23 class Person(models.Model):

    24     name = models.CharField(max_length=30)

    25     birthday = models.DateField()

    26 

    27     # Note that this model doesn't have "get_latest_by" set.

    28 

    29     def __unicode__(self):

    30         return self.name