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is there a way to make the DB create the ID property in an automatic way?
I want to generate something that looks like this:
Entity entity = schema.addEntity("MyEntity");
entity.addIdProperty().autoIncrement().primaryKey();
is this possible?
Yes, that looks just fine. Depending on your needs entity.addIdProperty() or entity.addIdProperty().autoIncrement() should be fine. addIdProperty will already call primaryKey().