Question

我有三个与一对多相关的实体：

订单（一）：

@Entity
@Table(name="order")
public class Order implements Serializable {
    [...]
    @OneToMany(cascade = CascadeType.ALL, mappedBy = "order", fetch = FetchType.LAZY, orphanRemoval = true)
    private List <OrderDetail> orderDetail;
    [...]
}

订单明细（很多）：

@Entity
@Table(name="orderDetail")
public class OrderDetail implements Serializable {
    [...]
    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "order_id", nullable = false)
    private Order order;

@OneToMany(cascade = CascadeType.ALL, mappedBy = "order", fetch = FetchType.LAZY, orphanRemoval = true)
    private List <OrderDetailRow> orderDetailRow;
    [...]
}

订单明细行（很多）：

@Entity
@Table(name="orderDetailRow")
public class OrderDetailRow implements Serializable {
    [...]
    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "order_detail_id", nullable = false)
    private OrderDetail order;
    [...]
}

我生成了分离对象树，假设订单带有一个OrderDetail，其中订单的ID和OrderDetail的ID 与数据库中存在的ID匹配和一些OrderDetailRows（我希望这些对象是在OrderDetail下创建了它们的id == null，因此它是由序列生成的。

然后我发出entityManager.merge（order），Hibernate试图将OrderDetail id设置为0，这导致数据完整性违规异常。

注意：在issung entityManager.merge之后，我看到生成的托管对象树非常好 - OrderDetailRows对象正确生成了它们的ID。我看到Hibernate尝试刷新时出错，因此事务可以完成

我做错了什么？

发布了“更新orderDetail set id =？where ID =？;”的Stacktrace：

"http-apr-4086-exec-3@10191" daemon prio=5 tid=0x52 nid=NA runnable
  java.lang.Thread.State: RUNNABLE
      at org.hibernate.engine.jdbc.batch.internal.NonBatchingBatch.addToBatch(NonBatchingBatch.java:61)
      at org.hibernate.persister.collection.OneToManyPersister.writeIndex(OneToManyPersister.java:251)
      at org.hibernate.persister.collection.OneToManyPersister.insertRows(OneToManyPersister.java:192)
      at org.hibernate.action.internal.CollectionUpdateAction.execute(CollectionUpdateAction.java:102)
      at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:465)
      at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:351)
      at org.hibernate.event.internal.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:350)
      at org.hibernate.event.internal.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:56)
      at org.hibernate.internal.SessionImpl.flush(SessionImpl.java:1258)
      at org.hibernate.internal.SessionImpl.managedFlush(SessionImpl.java:425)
      at org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction.beforeTransactionCommit(JdbcTransaction.java:101)
      at org.hibernate.engine.transaction.spi.AbstractTransactionImpl.commit(AbstractTransactionImpl.java:177)
      at org.hibernate.jpa.internal.TransactionImpl.commit(TransactionImpl.java:77)
      at org.springframework.orm.jpa.JpaTransactionManager.doCommit(JpaTransactionManager.java:517)
      at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:761)
      at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:730)
      at org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:485)
      at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:291)
      at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)
      at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
      at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:208)
      at com.sun.proxy.$Proxy141.save(Unknown Source:-1)

Hibernate spring-data-jpa存储库保存分离的实体树@OneToMany

0 个答案: