Steven,
You wrote:
> I've tried creating a method to fetch this value, as the manual suggests.
> But I don't see how to bind it to the table column.
>
It sounds like you may not have set an "extra-key" on your display group.
If you have already written a method on FOOD_EATEN which returns the value
from FOOD_TYPE_NAME, then you must add that method name to your display group
as an extra key.
Select the FOOD_EATEN display group in your .nib, then select the Attributes
inspector, that should allow you to see the methods, or keys, that you can
"wire-up" to your table view.
Type your new extra key method there, and after pressing add, it shows in
the list and allows you to wire to it. Your application will need to be
running for the extra key to show the derived value, so it won't work in IB
test mode, but will when you compile and run.
Good luck,
jesse
