Inline master

[Roberto Russi]

I have 3 models:

class Products(models.Model):

        brand = models.ForeignKey(

            Brands,

            verbose_name = "Brand",

        )

        code = models.CharField("Code",

            max_length=25, 

        )

        descr = models.CharField("Description",

            max_length=50, 

        )

class Orders(models.Model):

        brand = models.ForeignKey(

            Brands,

            verbose_name = "Brand",

            null=True,

            blank=True,

            related_name="ord_brand"

        )

        ord_date = models.DateField("Date")

        ord_numb = models.CharField("Number",

            max_length=20,

            unique_for_year="ord_date", 

        )

class OrderRows(models.Model):

        order = models.ForeignKey(

            Orders,

            verbose_name = "Order",

        )

        product = models.ForeignKey(

            Products,

            verbose_name = "Product",

        )

        price = models.DecimalField("Price",

            max_digits = 11,

            decimal_places=2,

        )

In my Admins.py I have a ModelAdmin for Orders whit a Inline for OrderRows.

How can I filter the product queryset in OrderRows where brand=orders.brand?