JPA。 JoinTable和两个JoinColumns

我需要创建表PORTATION_MODEL_SET。 我需要从表portation创建两个键，从table phone_model创建一个键

我有代码：

@Entity @Table(name="PORTATION") @SecondaryTable(name="PORTATION") @Cache(usage=CacheConcurrencyStrategy.NONSTRICT_READ_WRITE) public class JDBCPortation implements Portation { @Id @GeneratedValue(strategy=GenerationType.AUTO) private Integer id; @ManyToOne(targetEntity=JDBCContentMetaData.class, fetch=FetchType.LAZY) @JoinColumn(name="fk_content_id",nullable=false) private JDBCContentMetaData content; @ManyToMany(cascade={CascadeType.ALL},fetch=FetchType.LAZY,targetEntity=JDBCPhoneModel.class) @JoinTable( name="PORTATION_MODEL_SET", joinColumns={ @JoinColumn(table="PORTATION", name="fk_portation_id", referencedColumnName="id"), @JoinColumn(table="PORTATION", name="fk_content_id", referencedColumnName="fk_content_id", nullable=true) }, inverseJoinColumns=@JoinColumn(table="PHONE_MODEL",name="fk_phone_model_id", referencedColumnName="id")) private List phoneModel; //more code..... } 

和这个：

 @Entity @Table(name="PHONE_MODEL") @Cache(usage=CacheConcurrencyStrategy.NONSTRICT_READ_WRITE) public class JDBCPhoneModel implements PhoneModel { @Id @GeneratedValue(strategy=GenerationType.AUTO) private Integer id; @Column(name="wurfl_id",length=255,nullable=false) private String idWurfl; @Column(name="name",length=100,nullable=false) private String modelName; } 

和这个：

 @Entity @Table(name="CONTENT_META_DATA") public class JDBCContentMetaData implements ContentMetaData { @Id @GeneratedValue(strategy=GenerationType.AUTO) private Integer id; @OneToMany(mappedBy="content",cascade={CascadeType.PERSIST,CascadeType.MERGE},targetEntity=JDBCPortation.class,fetch=FetchType.LAZY) private List portations; } 

我这样做：

  JDBCPhoneModel phoneModel = new JDBCPhoneModel(); phoneModel.setIdWurfl("nokia_c50"); phoneModel.setModelName("c50"); JDBCContentMetaData content = JDBCContentMetaData.getNewInstance(); content.getMetaData().setName("goodaaar!"); content.getMetaData().setTitle("goood win!"); content.setType(portationType.getContentType()); basicRepository.saveForce(content); System.out.println("content_id:"+content.getId()); JDBCPortation portation = JDBCPortation.getInstance(content); portation.setBinPath("/var/www/abra.jpg"); portation.setPortitionType(portationType); //EXCEPTION IN SAVE FORCE basicRepository.saveForce(portation); portation.addPhoneModel(phoneModel); basicRepository.updateForce(portation); 

但

@JoinColumn（name =“fk_content_id”，referencedColumnName =“fk_content_id”，nullable = true）

生成错误：

 org.springframework.transaction.TransactionSystemException: Could not commit JPA transaction; nested exception is javax.persistence.RollbackException: Error while committing the transaction at org.springframework.orm.jpa.JpaTransactionManager.doCommit(JpaTransactionManager.java:476) at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:754) at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:723) at org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:393) at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:120) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172) at org.springframework.aop.framework.Cglib2AopProxy$DynamicAdvisedInterceptor.intercept(Cglib2AopProxy.java:621) at ru.icb.cms.repository.db.jpa.repository.BasicRepository$$EnhancerByCGLIB$$e5fc35ad.saveForce() at ru.icb.cms.repository.db.domain.RepositoryObjectTest.testCreateContent(RepositoryObjectTest.java:62) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20) 

PS适用于：

 @ManyToMany(cascade={CascadeType.ALL},fetch=FetchType.LAZY,targetEntity=JDBCPhoneModel.class) @JoinTable( name="PORTATION_MODEL_SET", joinColumns={ @JoinColumn(table="PORTATION",name="fk_portation_id", referencedColumnName="id") }, inverseJoinColumns=@JoinColumn(table="PHONE_MODEL",name="fk_phone_model_id", referencedColumnName="id")) private List phoneModel; 

Answer 1

 @ManyToMany(targetEntity = JDBCPhoneModel.class, cascade = CascadeType.ALL, fetch = FetchType.LAZY) @JoinTable(name = "PORTATION_MODEL_SET", joinColumns = {@JoinColumn(table = "PORTATION", name = "fk_portation_id", referencedColumnName = "id"), @JoinColumn(table = "PORTATION", name = "fk_content_id", referencedColumnName = "fk_content_id", nullable = true)}, inverseJoinColumns = @JoinColumn(table = "PHONE_MODEL", name="fk_phone_model_id", referencedColumnName = "id")) private List phoneModel; 

您缺少来自inverseJoinColumns定义的referencedColumnName 。 请看看它是否适合您。