mirror of
https://github.com/django/django.git
synced 2024-12-25 18:46:22 +00:00
b26f1d4664
git-svn-id: http://code.djangoproject.com/svn/django/trunk@13775 bcc190cf-cafb-0310-a4f2-bffc1f526a37
37 lines
1.1 KiB
Python
37 lines
1.1 KiB
Python
"""
|
|
3. Giving models custom methods
|
|
|
|
Any method you add to a model will be available to instances.
|
|
"""
|
|
|
|
from django.db import models
|
|
import datetime
|
|
|
|
class Article(models.Model):
|
|
headline = models.CharField(max_length=100)
|
|
pub_date = models.DateField()
|
|
|
|
def __unicode__(self):
|
|
return self.headline
|
|
|
|
def was_published_today(self):
|
|
return self.pub_date == datetime.date.today()
|
|
|
|
def articles_from_same_day_1(self):
|
|
return Article.objects.filter(pub_date=self.pub_date).exclude(id=self.id)
|
|
|
|
def articles_from_same_day_2(self):
|
|
"""
|
|
Verbose version of get_articles_from_same_day_1, which does a custom
|
|
database query for the sake of demonstration.
|
|
"""
|
|
from django.db import connection
|
|
cursor = connection.cursor()
|
|
cursor.execute("""
|
|
SELECT id, headline, pub_date
|
|
FROM custom_methods_article
|
|
WHERE pub_date = %s
|
|
AND id != %s""", [connection.ops.value_to_db_date(self.pub_date),
|
|
self.id])
|
|
return [self.__class__(*row) for row in cursor.fetchall()]
|