private void addBeerToPub() { System.out.print("beer: "); String name = scanner.nextLine(); Beer beer = server.find(Beer.class).where().like("name", name).findUnique(); if (beer == null) { System.out.println("does not exist"); return; } System.out.print("pub: "); name = scanner.nextLine(); Pub pub = server.find(Pub.class).where().like("name", name).findUnique(); if (pub == null) { System.out.println("does not exist"); return; } pub.addBeer(beer); server.save(pub); }