JPA CascadeType.REMOVE inverse

Question

我有一個客戶和預訂分貝。每個預訂有1個客戶，並且客戶可以有很多預訂。所以我在客戶成員上註明了@ManyToOne關係。我想如果我刪除了客戶，預訂也會被刪除。但我只能以其他方式做到這一點，如果預訂是刪除，客戶被刪除，我不想這樣做。這裏是我的代碼：

@Entity 
@NamedQueries({ 
    @NamedQuery(name = Customer.FIND_ALL, query = "SELECT c FROM Customer c ORDER BY c.name ASC"), 
    @NamedQuery(name = Customer.FIND_BY_EMAIL, query = "SELECT c FROM Customer c WHERE c.email = :email") 
}) 
@XmlRootElement 
@Table(name = "customer", uniqueConstraints = @UniqueConstraint(columnNames = "email")) 
public class Customer implements Serializable { 

private static final long serialVersionUID = 1L; 

public static final String FIND_ALL = "Customer.findAll"; 
public static final String FIND_BY_EMAIL = "Customer.findByEmail"; 

@Id 
@GeneratedValue(strategy = GenerationType.TABLE) 
private Long id; 

@NotNull 
@NotEmpty 
@Size(min = 1, max = 50) 
@Pattern(regexp = "[A-Za-z\\s]+") 
@Column(name = "name") 
private String name; 



@Entity 
@NamedQueries({ 
    @NamedQuery(name = Booking.FIND_ALL, query = "SELECT b FROM Booking b ORDER BY b.bookingDate ASC") 
}) 
@XmlRootElement 
@Table(name = "booking", uniqueConstraints = @UniqueConstraint(columnNames = {"customer", "booking_date"})) 
public class Booking implements Serializable { 


private static final long serialVersionUID = -1L; 

public static final String FIND_ALL = "Booking.findAll"; 


@Id 
@GeneratedValue(strategy = GenerationType.TABLE) 
private Long id; 


@NotNull 
@ManyToOne(cascade = {CascadeType.REMOVE}) 
@JoinColumn(name = "customer") 
private Customer customer; 

@NotNull 
@Future(message = "Bookings must be in future") 
@Column(name = "booking_date") 
@Temporal(value = TemporalType.DATE) 
private Date bookingDate; 

所以，如果我刪除客戶，預訂也應該刪除。有任何想法嗎？

謝謝

Answer 1

感謝Nizet的提示。它現在正在處理下面的代碼。

/* Booking class */ 
@NotNull 
@ManyToOne 
@JoinColumn(name = "customer") 
private Customer customer; 


/* Customer class */ 
@OneToMany(cascade = CascadeType.REMOVE, mappedBy = "taxi") 
private Set<Booking> bookings = new HashSet<Booking>();;