我正在开发一个Web应用程序,我正在使用JSF和JPA(EclipseLink)。我有表story
和story_translate
,其分别对应如下:JPA外键为空
@Entity
@Table(name = "story")
public class Story{
@Id
@GeneratedValue(strategy = GenerationType.SEQUENCE)
private Integer id;
private String title;
private String description;
@OneToMany(mappedBy = "story", cascade=CascadeType.ALL)
private List<StoryTranslate> translateList;
//getters and setters
}
@Entity
@Table(name = "story_translate")
public class StoryTranslate{
@Id
@GeneratedValue(strategy = GenerationType.SEQUENCE)
private Integer id;
@Column(name="STORY_ID")
private Integer storyId;
@ManyToOne
@JoinColumn(name="story_id", referencedColumnName="id", updatable=false, insertable=false)
private Story story;
//some other fields, getters and setters
}
在ManagedBean
我做了以下内容:
StoryTranslate translate = new StoryTranslate(null, sessionController.getEntity().getId(), getAuthUser().getId(), language,
title, description, new Date(), false);
EntityTransaction transaction = TransactionSingleton.getActiveInstance();
Story story = storyService.read(sessionController.getEntity().getId());
if (story != null){
if (story.getTranslateList() == null){
story.setTranslateList(new ArrayList<StoryTranslate>());
}
story.getTranslateList().add(translate);
translate.setStory(story);
}
transaction.commit();
当我尝试创建一个新的StoryTranslate
,我得到一个DatabaseException
,说story_id
不能为空。
我曾经管理关系,但我从未见过这个错误。
问题在哪里?
编辑:我很抱歉,但我忘记了映射的另一部分(必须是缺乏睡眠)。