Hibernate如何不生成唯一索引

Question

使用 question_id 字段生成表 question_list_sent - 此字段包含唯一索引。如何将此字段注释为正常而非唯一。

    @Entity
@Table(name = "question_list")
public class QuestionList implements Serializable {

    @Id @GeneratedValue(strategy = GenerationType.AUTO)
    private long id;

    @OneToOne(fetch = FetchType.LAZY,cascade = {CascadeType.REFRESH,CascadeType.PERSIST})
    private User owner;

    @OneToMany(fetch = FetchType.LAZY,cascade = {CascadeType.REFRESH,CascadeType.PERSIST})
    @JoinTable(name = "question_list_sent",
            joinColumns = {@JoinColumn(name = "question_list_id",unique = false)},
            inverseJoinColumns = {@JoinColumn(name = "question_id",unique = false)}
    )
    private List<Question> sent;

Answer 1

你的JoinTable是OneToMany，这意味着一个QuestionList可以有多个Question，但每个Question只有一个QuestionList。要删除唯一约束，请使用JoinTable ManyToMany。