Virtual field to hold constant value and not persist

I’m trying to implement a STAC specification using Ash. As part of the spec for a STAC Item the field type must be the string Feature and since that is constant, would that be a read change? I don’t want to waste space in a database with a static field that can’t have other values, but I still want that to be an attribute on the resource.

You can have a calculation that evaluates to a static value. Have you looked into calculations yet?

I think that would work. Thanks