[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-5751) MappingException: using @Column in Embedded ID classes fail when also used in an @JoinColumn in the entity class
Karsten Wutzke (JIRA)
noreply at atlassian.com
Mon Nov 22 13:40:13 EST 2010
[ http://opensource.atlassian.com/projects/hibernate/browse/HHH-5751?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=39183#action_39183 ]
Karsten Wutzke commented on HHH-5751:
-------------------------------------
I've attached a standalone SSCCE using JavaSE, Hibernate 3.6, HSQLDB, and Ant. Just use "ant run" from a shell.
> MappingException: using @Column in Embedded ID classes fail when also used in an @JoinColumn in the entity class
> ----------------------------------------------------------------------------------------------------------------
>
> Key: HHH-5751
> URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-5751
> Project: Hibernate Core
> Issue Type: Bug
> Components: annotations, core, metamodel
> Affects Versions: 3.6.0
> Environment: Hibernate 3.6, JavaSE, HSQLDB, Ant
> Reporter: Karsten Wutzke
> Priority: Critical
> Attachments: zips-hib-embeddedid-column-broken.zip
>
>
> Here's the DB design (DDL):
> CREATE TABLE Countries
> (
> iso_code CHAR(2) NOT NULL,
> name VARCHAR(50) NOT NULL,
> PRIMARY KEY (iso_code)
> );
> CREATE TABLE Zips
> (
> country_code CHAR(2) NOT NULL,
> code VARCHAR(10) NOT NULL,
> PRIMARY KEY (country_code, code),
> FOREIGN KEY (country_code) REFERENCES Countries (iso_code)
> );
> Here's the Zip class + composite primary key class:
> @Entity
> @Table(name = "Zips")
> public class Zip implements Serializable
> {
> @EmbeddedId
> private ZipId embeddedId;
> @ManyToOne
> @JoinColumn(name = "country_code", referencedColumnName = "iso_code")
> private Country country = null;
> ...
> }
> @Embeddable
> public class ZipId implements Serializable
> {
> @Column(name = "country_code", insertable = false, updatable = false)
> private String countryCode;
> @Column(name = "code")
> private String code;
> ...
> }
> Hibernate stack trace:
> Exception in thread "main" javax.persistence.PersistenceException: [PersistenceUnit: zips] Unable to build EntityManagerFactory
> at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:911)
> at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:57)
> at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:48)
> at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:32)
> at tld.zips.Main.main(Main.java:27)
> Caused by: org.hibernate.MappingException: Repeated column in mapping for entity: tld.zips.model.Zip column: country_code (should be mapped with insert="false" update="false")
> at org.hibernate.mapping.PersistentClass.checkColumnDuplication(PersistentClass.java:675)
> at org.hibernate.mapping.PersistentClass.checkPropertyColumnDuplication(PersistentClass.java:697)
> at org.hibernate.mapping.PersistentClass.checkColumnDuplication(PersistentClass.java:719)
> at org.hibernate.mapping.PersistentClass.validate(PersistentClass.java:473)
> at org.hibernate.mapping.RootClass.validate(RootClass.java:235)
> at org.hibernate.cfg.Configuration.validate(Configuration.java:1332)
> at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1835)
> at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:902)
> ... 4 more
> The problem here is the @Column on the @Embeddable composite primary key class. country_code is mapped as read-only (insertable = false, updatable = false) in the composite primary key class. The above syntax is JPA-compatible. Clearly, there's no other clean way where to put the @Column annotations but into the @Embeddable class. It's incomprehensible why this doesn't work. @Embeddable classes allow @Basic, @Column, @Enumerated, @Temporal, @Lob, and @Embedded on its columns, so this should work.
> The exception vanishes when putting the insertable = false, updatable = false on the @JoinColumn, but this is not what I want. I prefer my associations to be writable...
> The above syntax works perfectly with EclipseLink!
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