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我有两个问题entityes在我的项目领域: 第一:Hibernate映射减排问题
public class User implements UserDetails {
private static final long serialVersionUID = -8442780593066407492L;
@Id
@Column(name = "id")
@GeneratedValue(strategy = GenerationType.IDENTITY)
private long id;
@ManyToMany(fetch = FetchType.EAGER, cascade = CascadeType.ALL)
@JoinTable(name = "user_role",
joinColumns = {@JoinColumn(name = "user_id")},
inverseJoinColumns = {@JoinColumn(name = "role_id")})
private Set<UserRole> userRoles = new HashSet<UserRole>();
@OneToMany(mappedBy = "user", cascade = CascadeType.REMOVE)
private Set<CommentReserv> comments = new HashSet<CommentReserv>();
public Collection<? extends GrantedAuthority> getAuthorities() {
List<SimpleGrantedAuthority> result = new
ArrayList<SimpleGrantedAuthority>();
for (UserRole userRole: userRoles) {
result.add(new
SimpleGrantedAuthority(userRole.getListRole().name()));
}
return result;
}
...
}
二:
public class CommentReserv implements Serializable {
private static final long serialVersionUID = 1579363480188238317L;
@Id
@Column(name = "id")
@GeneratedValue(strategy = GenerationType.IDENTITY)
private long id;
@ManyToOne
@JoinColumn(name = "reservation_id")
private Reservation reservation;
@ManyToOne(fetch = FetchType.EAGER, cascade = CascadeType.ALL)
@JoinColumn(name = "user_id")
private User user;
...
}
三:
public class Reservation implements Serializable{
private static final long serialVersionUID = -9007238193656173229L;
@Id
@Column(name = "id")
private String id = generateId();
...
@OneToMany(mappedBy = "reservation", cascade = CascadeType.REMOVE)
private Set<CommentReserv> comments = new HashSet<CommentReserv>();
...
然后我得到保留和用户从DB ...
Reservation reservation = this.reservationRepository.getReservationById(params.get("reservationId").toString());
User currentUser = this.userRepository.getUser(principal.getName());
(我检查了它。用户正确加载。) 并将其设置为新的CommentReserv实例。
commentReserv.setReservation(reservation);
commentReserv.setComment(params.get("comment").toString());
commentReserv.setUser(currentUser);
当我试图挽救新CommentReserv,我得到用户拷贝在我的数据库。 我尝试从CommentReserv中删除cascadetype,但它产生TransientObjectException。 我的代码有什么问题?第二晚没有睡觉...
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