异常使用播放框架JPA更新唯一约束场

Question

从一个独特的领域（MySQL的）我需要在一个事务中再次重命名 剩下的值删除1个值后： 代码：

JPA.withTransaction(new Callback0() { 
      @Override 
      public void invoke() throws Throwable { 
       obj.removeDevice(deviceID); 
      // if I put removeDevice in different transaction it works ! 
      // but can cause integrity problem i case of failure  
       obj.changeTemporalDevices(...); 
       obj.reCalcDevicesNames(...); 

       obj.saveDevices(....); 

      } 
     }); 

这似乎JPA不会“看见”的值已经在一个事务中被删除，我得到了下面的异常：

[ERROR] org.hibernate.engine.jdbc.spi.SqlExceptionHelper - Duplicate entry 'aaa2r28c011' for key 'name_device_UNIQUE' 
[ERROR] application - javax.persistence.RollbackException: Error while committing the transaction 
java.lang.RuntimeException: javax.persistence.RollbackException: Error while committing the transaction 
     at play.db.jpa.JPA.withTransaction(JPA.java:111) ~[play-java-jpa_2.10-2.3.8.jar:2.3.8] 

Answer 1

您应该删除后立即刷新您的会话，为了不让休眠选择SQL语句的EXE命令。