OwnerOf

Which field of a model records its owner: the name storage knows it by, and the way to read it off a row.

Two things because two modules need different halves of the same fact. db renders name into the owner condition of four statements, and http calls get to compare a row's owner with the current user, which is what decides whether a show page offers an edit link. Deriving one from the other is not possible in either direction: a getter cannot be read for a column name at runtime, and a name cannot be turned into a typed getter without a mirror.

It is built at compile time, from a field selector, so the name is the model's own field and not a string somebody typed. See io.eezo.auth.Guard's owning.