Django chained foreign key forms

Question

What I am trying to do should be fairly simple.

At a high level, here is what I want:

If we have a store with multiple items, I want to categorize each item on two levels

Upper_Category:
name

Sub_Category:
name
parent -- foreign key: Upper_Category

So, each item would look like:

Item:
name
description
...etc...
category -- foreign key: Sub_Category

Filled in, they might be:
Upper_Categories:
Food
Drink
Dishes

Sub_Categories:
Meat: parent=Food
...
Beer: parent=Drink

It seems to me that I should be able to wrap this all into an editable formset based on 'Item' where each item includes a reference to what Upper_Category it belongs to

Category | Sub-Category | Name | Description
...
"Drink" | "Beer" | "Something IPA" | "beer description.."
...etc

I don't need to edit the categories and upper categories themselves, but it seems like there should be a straightforward way to reference the parent of a foreign key.