I have a problem in Hibernate when updating an object which contains a collection of another object. Here's what it looks like:
@Entity
@Table(name = "Garage")
public class Garage {
@OneToMany(targetEntity = Car.class, cascade = CascadeType.ALL, fetch = FetchType.LAZY, mappedBy = "garage", orphanRemoval = true)
public Set<Car> getCars() {
return cars;
}
}
Then there is the Car class:
@Entity
@Table(name="Car", uniqueConstraints=@UniqueConstraint(columnNames={"GarageId"}))
public class Car {
private Garage garage;
@ManyToOne(optional=false)
@JoinColumn(name="GarageId")
public Garage getGarage() {
return garage;
}
}
The garage then has a service:
@Transactional
public class GarageService {
public void updateGarage(Session session, Garage garage) {
session.update(garage);
}
}
Now lets say I have in my database a garage with a white, blue and red car.
| GarageId |
| 1 |
| CarId | Color | GarageId |
| 1 | white | 1 |
| 2 | blue | 1 |
| 3 | red | 1 |
If I call my update method with the same garage but with only a blue and a red car, the update is successful. The database removed the white car from the Car table.
| CarId | Color | GarageId |
| 2 | blue | 1 |
| 3 | red | 1 |
However, if I call my update method with the same garage but with an empty collection of cars, no car gets deleted from the Car table.
Any ideas what I might be doing wrong?
