1

在我更新 GWT 中的一些实体后，我想保存它们。但是，当我尝试保留它们时，当我查看 AppEngine 管理界面时它不会保存。布尔值没有改变。

代码

    EntityManager em = EMF.get().createEntityManager();
    for (OnixUser s: admin) {
        log.info(s.email + ", " + s.isAdmin);
        em.merge(s);  
    }
    em.close();

更新交易

    EntityManager em = EMF.get().createEntityManager();
    em.getTransaction().begin();
    for (OnixUser s: admin) {
        log.info(s.email + ", " + s.isAdmin);
        OnixUser merged = em.merge(s);
        em.persist(merged);
//          em.persist(s);
    }
    em.getTransaction().commit();
    em.close();

还是没有保存。没有抛出异常。

日志

 Oct 16, 2013 3:19:10 PM com.example.sdm.server.SDMServiceImpl setAdmin
 INFO: chloe@example.com, true

OnixUser 实体的 App Engine 管理界面

伊姆古尔

以 FINEST 级别登录

FINE: Created ManagedConnection using DatastoreService = com.google.appengine.api.datastore.DatastoreServiceImpl@2fd9270d
Oct 16, 2013 4:03:14 PM org.datanucleus.store.connection.ConnectionManagerImpl allocateConnection
FINE: Connection added to the pool : com.google.appengine.datanucleus.DatastoreConnectionFactoryImpl$DatastoreManagedConnection@31c1f89d for key=org.datanucleus.ObjectManagerImpl@6977c57b in factory=ConnectionFactory:tx[com.google.appengine.datanucleus.DatastoreConnectionFactoryImpl@2b1f5f6b]
Oct 16, 2013 4:03:14 PM com.example.sdm.server.SDMServiceImpl setAdmin
INFO: chloe@example.com, true
Oct 16, 2013 4:03:14 PM org.datanucleus.state.LifeCycleState changeState
FINE: Object "com.example.sdm.shared.OnixUser@48ef6e99" (id="com.example.sdm.shared.OnixUser:6456332278300672") has a lifecycle change : "P_CLEAN"->"P_NONTRANS"
Oct 16, 2013 4:03:14 PM org.datanucleus.store.connection.ConnectionManagerImpl$1 managedConnectionPostClose
FINE: Connection removed from the pool : com.google.appengine.datanucleus.DatastoreConnectionFactoryImpl$DatastoreManagedConnection@31c1f89d for key=org.datanucleus.ObjectManagerImpl@6977c57b in factory=ConnectionFactory:tx[com.google.appengine.datanucleus.DatastoreConnectionFactoryImpl@2b1f5f6b]
Oct 16, 2013 4:03:14 PM org.datanucleus.state.LifeCycleState changeState
FINE: Object "com.example.sdm.shared.OnixUser@48ef6e99" (id="com.example.sdm.shared.OnixUser:6456332278300672") has a lifecycle change : "P_NONTRANS"->"DETACHED_CLEAN"
Oct 16, 2013 4:03:14 PM com.google.apphosting.utils.jetty.AppEngineAuthentication$AppEngineUserRealm disassociate
FINE: Ignoring disassociate call for: chloe@example.com
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1 回答 1

0

如果尽管使用了事务，但您的数据没有持久化，那么最好的方法是尝试记录以查看下面发生的情况。当您使用 DataNucleus 作为持久性提供程序时，您可以参考此链接来配置 SQL 日志记录。与您相关的信息在页面末尾附近提供。

于 2013-10-16T19:41:58.950 回答