如何配置@OneToMany - 获取PSQLException

时间:2014-04-05 00:54:27

标签: spring hibernate postgresql jpa-2.0

我正在尝试创建一个@OneToMany关系,虽然我在这里阅读了几个答案但我仍然得到了PSQLException。

我正在尝试创建包含许多Media对象的Track。所以我跟着this回答。

问题: 在尝试保存包含多个Track的A Medias时:

PSQLException: ERROR: insert or update on table medias violates foreign key constraint 
  Detail: Key (normmediatitle)=(SOME_MEDIA_TITLE) is not present in table tracks.

我缺少什么?

媒体:

@Entity(name = "medias")
public class Media {
    static Logger logger = LoggerFactory.getLogger(Media.class);

    @Id
    @NotNull
    @Column(name="normmediatitle")
    private String title;

    @GeneratedValue(strategy = GenerationType.AUTO, generator = "media_seq_gen")
    @SequenceGenerator(name = "media_seq_gen", sequenceName = "mediaSeq")
    private long id;


    @NotNull
    @Column(unique = true)
    private String videoId;

:跟踪:

@Entity(name = "tracks")
public class Track {
    static Logger logger = LoggerFactory.getLogger(Track.class);

    @Id
    @NotNull
    @Column(name="normtracktitle")
    private String title;

    @NotNull
    @OneToMany(cascade = CascadeType.ALL)
    @JoinColumn(name="normmediatitle", referencedColumnName="normtracktitle")
    private List<Media> medias;

更新 - Pom.xml:

<dependency>
    <groupId>org.springframework.data</groupId>
    <artifactId>spring-data-jpa</artifactId>
    <version>1.5.1.RELEASE</version>
</dependency>

<dependency>
    <groupId>org.hibernate.javax.persistence</groupId>
    <artifactId>hibernate-jpa-2.0-api</artifactId>
    <version>1.0.1.Final</version>
</dependency>

<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-entitymanager</artifactId>
    <version>4.3.4.Final</version>
</dependency>

<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-validator</artifactId>
    <version>5.1.0.Final</version>
</dependency>

1 个答案:

答案 0 :(得分:0)

我最终按照JPA 1.0标准执行了@OneToMany。这不是单向的,但对我来说更有意义:)。

我发现this网站可靠,并且已经解释了JPA 1.0和JPA 2.0实现。