class Format(models.Model):
length = models.IntegerField("Длина(мм)")
amount = models.IntegerFiel("Количество")
class Order(models.Model):
reels = models.ManyToManyField(ReelsGroup)
cutter_len = models.IntegerField("Длина тамбура")
created = models.DateTimeField(auto_now_add=True)