休眠條件查詢爲多對多枚舉

Question

我有一個類註釋：

@Entity 
@Table(name = Constants.COMMENTS_TABLE) 
@Audited 
public class Comment { 


@Column(name = "comment", nullable = false) 
private String comment; 

@ElementCollection(targetClass = CommentTopic.class) 
@Enumerated(EnumType.STRING) 
@Fetch(value = FetchMode.JOIN) 
@CollectionTable(name = Constants.COMMENTS_TOPIC_JOIN_TABLE, joinColumns = @JoinColumn(name = "comment_id")) 
@Column(name = "topic") 
private Set<CommentTopic> commentTopics; 

@Id 
@GeneratedValue(strategy = GenerationType.IDENTITY) 
@Column(name = "comment_id", nullable = false) 
private Long commentId; 
} 

堅持的評論類作品，但下列條件查詢：

Criteria criteria = session.createCriteria(Comment.class) 
     .add(Restrictions.eq("commentTopics", topic)); 

List<Comment> entries = criteria.list(); 

拋出org.hibernate.exception.DataException ：沒有爲參數1指定值。

這是查詢內置的：

se將this_.comment_id作爲comment1_0_0_，this_.comment作爲comment0_0_，commenttop2_.comment_id作爲comment1_0_2_，commenttop2_.topic作爲topic2_從評論this_ left外部連接comments_topic commenttop2_在this_.comment_id = commenttop2_.comment_id其中this_.comment_id =？

我使用不正確的註釋嗎？

標準查詢是否未正確構建？

Answer 1

我將CommentTopic枚舉放置在CommentTopicWrapper類中。

我的commentTopicsSet註釋更新爲：

@OneToMany(targetEntity = CommentTopicWrapper.class, cascade = CascadeType.ALL, fetch = FetchType.EAGER) 
@JoinTable(name = Constants.COMMENTS_TOPIC_JOIN_TABLE, joinColumns = @JoinColumn(name = "comment_id"), inverseJoinColumns = @JoinColumn(name = "topic")) 
private Set<CommentTopicWrapper> commentTopics;