Spring Boot. how to Pass Optional<> to an Entity Class

Question

i am currently making a website using spring and i stumble upon this basic scenario that i don\'t have any idea on how to solve this specific code: Entity = Optional;

Answer 1

According to your error you are getting Optional from repository's findAll method and you are casting it to RoomEntity.

Instead of RoomEntity roomEntity = roomRepository.findById(roomId); do this

Optional optinalEntity = roomRepository.findById(roomId); RoomEntity roomEntity = optionalEntity.get();