Проверка связи между сущностями

public class PerformanceController {
 
    private final PerformanceService performanceService;
 
    public PerformanceController(PerformanceService performanceService) {
        this.performanceService = performanceService;
    }
 
 
    @DeleteMapping("/performance/{id}")
    public ResponseEntity<PerformanceResponsDto> deletePerformance(@PathVariable Long id) {
 
        //вот тут должен быть запрос
        performanceService.deleteById(id);
        return new ResponseEntity<>(HttpStatus.OK);
    }
}

OtherObject otherObject = object.getOtherObject();
if (otherObject != null) throw new SomeException();

@Entity
@Table(name = "production_studios_movies")
@Getter
@Setter
public class ProductionStudiosMovie {
 
    @Id
    @GeneratedValue(strategy = GenerationType.SEQUENCE)
    private Long id;
 
    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "performance_id", nullable = false)
    public StudiosPerformance studiosPerformance;
 
    public ProductionStudiosMovie() {
    }
 
    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || Hibernate.getClass(this) != Hibernate.getClass(o)) return false;
        ProductionStudiosMovie that = (ProductionStudiosMovie) o;
        return id != null && Objects.equals(id, that.id);
    }
 
    @Override
    public int hashCode() {
        return getClass().hashCode();
    }
}
}
 
@Entity
@Table(name = "studios_performance")
@Getter
@Setter
@ToString
public class StudiosPerformance {
    @Id
    @GeneratedValue(strategy = GenerationType.SEQUENCE)
    private Long id;
 
    @Column(name = "name")
    private String name;
 
    public StudiosPerformance() {
    }
 
    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || Hibernate.getClass(this) != Hibernate.getClass(o)) return false;
        StudiosPerformance that = (StudiosPerformance) o;
        return id != null && Objects.equals(id, that.id);
    }
 
    @Override
    public int hashCode() {
        return getClass().hashCode();
    }
}

@Entity
@Table(name = "studios_performance")
@Getter
@Setter
@ToString
public class StudiosPerformance {
    //...
    
    @OneToMany(mappedBy="studiosPerformance")
    public Set<ProductionStudiosMovie> movies;
    //...
 
}