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"""
8. get_latest_by
Models can have a ``get_latest_by`` attribute, which should be set to the name
of a ``DateField`` or ``DateTimeField``. If ``get_latest_by`` exists, the
model's manager will get a ``latest()`` method, which will return the latest
object in the database according to that field. "Latest" means "having the date
farthest into the future."
"""
from django.db import models
class Article(models.Model):
headline = models.CharField(max_length=100)
pub_date = models.DateField()
expire_date = models.DateField()
class Meta:
get_latest_by = 'pub_date'
def __unicode__(self):
return self.headline
class Person(models.Model):
name = models.CharField(max_length=30)
birthday = models.DateField()
# Note that this model doesn't have "get_latest_by" set.
def __unicode__(self):
return self.name
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