MetamodelX::Red::OnDB

method is-on-db

method is-on-db(
    \instance
) returns Mu

Checks if the instance of model has a record in the database or not. For example, Person.^create(...).^is-on-db returns True, because ^create was called, but Person.new(...).^is-on-db will return False, because the created object does not have a representation in the database without calls to ^create or ^save done.

method saved-on-db

method saved-on-db(
    \instance
) returns Mu

Sets that that object is on DB