ok, another dumb question

how do I transact something with a lookup ref?

given this schema:

(def ^:private schema
  {::node-id {:db/unique :db.unique/identity}})

(ds/db-with (ds/empty-db schema)
            [{::node-id "root"}
             {::node-id "seg-asdf"
              ::node-type ::segment/v3
              ::parent [::node-id "root"]}])

ah ok, I needed to add {:db/valueType :db.type/ref} to the schema for ::parent