JPA - Get values from fields in other entities in a Controller class - spring

Question

I have two entities: Room and Service. I also have a method in Logic class that i want to use in ServiceController class. Other classes are irrelevant.
room.getBeds() always returns 0, default int value.
Room entity:
#Entity
public class Room {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private int room_id;
private int beds;
private int number;
public Room() {
}
public Room(int beds, int number) {
this.beds = beds;
this.number = number;
}
public int getRoom_id() {
return room_id;
}
public void setRoom_id(int room_id) {
this.room_id = room_id;
}
public int getBeds() {
return beds;
}
public void setBeds(int beds) {
this.beds = beds;
}
public int getNumber() {
return number;
}
public void setNumber(int number) {
this.number = number;
}
}
Service entity:
#Entity
public class Service {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private int service_id;
#JsonFormat(pattern = "dd/MM/yyyy", timezone = "Europe/Berlin")
private Date arrival_at;
#JsonFormat(pattern = "dd/MM/yyyy", timezone = "Europe/Berlin")
private Date departure_at;
private int meals;
private int guest_id;
private double price;
public int getService_id() {
return service_id;
}
public void setService_id(int service_id) {
this.service_id = service_id;
}
public Date getArrival_at() {
return arrival_at;
}
public void setArrival_at(Date arrival_at) {
this.arrival_at = arrival_at;
}
public Date getDeparture_at() {
return departure_at;
}
public void setDeparture_at(Date departure_at) {
this.departure_at = departure_at;
}
public int getMeals() {
return meals;
}
public void setMeals(int meals) {
this.meals = meals;
}
public int getGuest_id() {
return guest_id;
}
public void setGuest_id(int guest_id) {
this.guest_id = guest_id;
}
public double getPrice() {
return price;
}
public void setPrice(double price) {
this.price = price;
}
}
Service controller:
#RestController
public class ServiceController {
#Autowired
ServiceRepository serviceRepository;
private Logic logic = new Logic();
private Room room = new Room();
//CREATE
#PostMapping("/services")
public int createService(#RequestBody Service service) {
service.setPrice(logic.calculatePrice(service.getArrival_at(), service.getDeparture_at(), room.getBeds(), service.getMeals()));
return serviceRepository.save(service);
}
}
How to get the correct value from room.getBeds() getter?

Answer 1

Lerius you are just making a new object of Room Entity and are not populating any values from your Database to that object
that is the reason why it is taking room.getBeds(); as 0(i.e default value for int)
Try Populating DB values to your object after that you will be able to get the value of getBeds();