0
我在JPA關係中遇到了很多問題。我一直在通過互聯網搜索,發現了很多類似於我的案例,但提出的解決方案並不適合我。讓我告訴你的java類映射Oracle表:關聯到這些行動休眠與主鍵作爲外鍵的雙向關聯
@Entity
@Table(name="CONFIGURATIONS")
public class Configuration implements Serializable {
@Id
@Column(name="EAC_ID")
private int id;
@OneToMany
@Cascade({CascadeType.ALL})
@JoinColumn(name="ACT_EAC_ID", nullable=false)
private List<Actions> actions;
...
}
@Entity
@Table(name="ACTIONS")
public class Actions implements Serializable {
@Id
@Column(name="ACT_ID")
private int id;
@ManyToOne
@JoinColumn(name="ACT_EAC_ID", updatable=false, insertable=false)
private Configuration configuration;
@OneToMany
@Cascade({CascadeType.ALL})
@JoinColumn(name="ECF_ACT_ID", nullable=false)
private List<Filter> filters;
...
}
@Entity
@Table(name="FILTERS")
public class Filter implements Serializable {
@EmbeddedId
private FilterPK id = new FilterPK();
@ManyToOne
@JoinColumn(name = "ECF_ACT_ID", insertable = false, updatable = false)
private Actions action = null;
...
}
@Embeddable
public class FilterPK implements Serializable {
@Column(name="ECF_KEY", nullable=false, length=100)
private String key;
@Column(name="ECF_ACT_ID", insertable = false, updatable = false)
private int actionId;
}
的事情,存儲新配置到數據庫時,其所有相關的動作應該自動存儲的,還有過濾器。
當前,配置及其動作會自動存儲(不含篩選器)。這是我如何實現這一點:
public int createConfiguration(Configuration conf) {
for(Actions act : conf.getActions()) {
act.setConfiguration(conf);
}
em.persist(conf);
return conf.getId();
}
的問題是,當我添加了過濾器映射,我總是得到這樣的例外:
ERROR [org.jboss.msc.service.fail] (ServerService Thread Pool -- 21) MSC000001: Failed to start service jboss.persistenceunit.ame: org.jboss.msc.service.StartException in service jboss.persistenceunit."ame": javax.persistence.PersistenceException: [PersistenceUnit: ame] Unable to build EntityManagerFactory
at org.jboss.as.jpa.service.PersistenceUnitServiceImpl$1.run(PersistenceUnitServiceImpl.java:103)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [rt.jar:1.7.0_71]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [rt.jar:1.7.0_71]
at java.lang.Thread.run(Thread.java:745) [rt.jar:1.7.0_71]
at org.jboss.threads.JBossThread.run(JBossThread.java:122) [jboss-threads-2.1.0.Final-redhat-1.jar:2.1.0.Final-redhat-1]
Caused by: javax.persistence.PersistenceException: [PersistenceUnit:ame] Unable to build EntityManagerFactory
at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:930)
at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:904)
at org.hibernate.ejb.HibernatePersistence.createContainerEntityManagerFactory(HibernatePersistence.java:92)
at org.jboss.as.jpa.service.PersistenceUnitServiceImpl.createContainerEntityManagerFactory(PersistenceUnitServiceImpl.java:200)
at org.jboss.as.jpa.service.PersistenceUnitServiceImpl.access$600(PersistenceUnitServiceImpl.java:57)
at org.jboss.as.jpa.service.PersistenceUnitServiceImpl$1.run(PersistenceUnitServiceImpl.java:99)
... 4 more
**Caused by: org.hibernate.MappingException: Repeated column in mapping for entity: Filter column: ECF_ACT_ID (should be mapped with insert="false" update="false")**
at org.hibernate.mapping.PersistentClass.checkColumnDuplication(PersistentClass.java:682)
at org.hibernate.mapping.PersistentClass.checkPropertyColumnDuplication(PersistentClass.java:704)
at org.hibernate.mapping.PersistentClass.checkColumnDuplication(PersistentClass.java:726)
at org.hibernate.mapping.PersistentClass.validate(PersistentClass.java:479)
at org.hibernate.mapping.RootClass.validate(RootClass.java:270)
at org.hibernate.cfg.Configuration.validate(Configuration.java:1284)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1742)
at org.hibernate.ejb.EntityManagerFactoryImpl.<init>(EntityManagerFactoryImpl.java:94)
at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:920)
... 9 more
有沒有人經歷了同樣的問題的種類?我怎麼能解決這個問題?
在此先感謝您的幫助!
配置和操作之間的關係已經正常工作。問題在於操作 - 過濾器關係。 – 2015-02-24 07:54:25
抱歉不清楚。同樣使用相同的註釋模板對您的操作進行過濾,它就是同一種關係 – Zielu 2015-02-24 11:19:54