Django Model Retrieve Image from URL

class Image(models.Model):
    original = models.ImageField(
        upload_to='products',
        max_length=250,
        blank=True,
        null=True
    )
    thumbnail = ImageSpecField(
        source='original',
        processors=[ResizeToFill(100, 50)],
        format='JPEG',
        options={'quality': 60}
    )
    image_url = models.URLField(blank=True, null=True, unique=True, max_length=250)
    product = models.ForeignKey(Product, related_name='images')
    created_at = models.DateTimeField(
                                      auto_now_add=True,
                                      blank=True, null=True)
    updated_at = models.DateTimeField(
                                      auto_now=True,
                                      blank=True, null=True)

    def get_remote_image(self):
        if self.image_url:
            filename = urlparse(self.image_url).path.split('/')[-1]
            full_path = os.path.abspath('storeuno')
            try:
                result = urlretrieve(self.image_url, os.path.join(full_path + '/media/products', filename))
                self.original = '/media/products/' + result[0].rsplit('/', 1)[-1]
                self.save()
            except urllib.error.HTTPError:
                pass

    def __str__(self):
        return self.image_url[:10]

    class Meta:
        verbose_name = u'Image'
        verbose_name_plural = u'Images'
        ordering = ["updated_at"]

Call the get_remote_image on the object after creation