The generic function update-slot-from-record updates the value in the slot slot of the View Class instance instance using the records in the database.
instance must be associated with a database.
The argument slot is the CLOS slot name; the corresponding column names are derived from the View Class definition.
The update is not recursive on joins. Join slots (that is, slots with
:db-kind
:join
) are updated, but the joined objects are not updated.