mixin snippet

gistfile1.txt

width = models.PositiveIntegerField(_("height"), db_index=True)
height = models.PositiveIntegerField(_("width"), db_index=True)

def is_horizontal(self):
    if float(self.height) / self.width <= 0.7:
        return True

def is_vertical(self):
    if float(self.height) / self.width > 0.7:
        return True

def is_square(self):
    if self.width == self.height:
        return True

def save(self):
    if not self.image:
        self.delete()
    else:
        image = Image.open(cStringIO.StringIO(urllib.urlopen(self.image.url).read()))
        self.width, self.height = image.size
        super(Poster, self).save()