class Product(models.Model):
    title = models.TextField(verbose_name='Номер',blank=True)
    producte = models.TextField(verbose_name='Продукт')
    order = models.ForeignKey('orders.Order', verbose_name='Заказ')
class Order(models.Model):
    title = models.CharField(verbose_name='Название заказа', max_length=60)
    slug = models.SlugField(verbose_name='URL',unique=True)# view.py
def ViewOrder(request, slug):
    order = Order.objects.select_related().get(slug=slug)
    starts = order.start_set.all()
    id = Order.pkurl(r'^(?P<slug>[-\w]+)/$', ViewOrder, name='view_order'),class ProducteForm(ModelForm):
    class Meta:
        model = Producte
        fields = ('title','producte', 'order') 
  
  class Category(models.Model):
    name =....
class Product(models.Model):
    category = models.ForeignKey(Category)
    title = models.TextField(verbose_name='Номер',blank=True)
    producte = models.TextField(verbose_name='Продукт')
class Order(models.Model):
    products = models.ManyToMany(Product)