class Image(models.Model):    user = models.ForeignKey(settings.AUTH_USER_MODEL,                             related_name='images_created')    title = models.CharField(max_length=200)    slug = models.SlugField(max_length=200, blank=True)    url = models.URLField()    image = models.ImageField(upload_to='images/%Y/%m/%d')    description = models.TextField(blank=True)    users_like = models.ManyToManyField(settings.AUTH_USER_MODEL,                                        related_name='images_liked',                                        blank=True)    created = models.DateField(auto_now_add=True, db_index=True)    def get_absolute_url(self):        return reverse('images:detail', args=[self.id, self.slug])    def save(self, *args, **kwargs):        if not self.slug:            self.slug = slugify(self.title)            super(Image, self).save(*args, **kwargs)    def __unicode__(self):        return self.title

ABSOLUTE_URL_OVERRIDES = {    'auth.user': lambda u: reverse_lazy('user_detail',                                        args=[u.username])}