NHibernate 3.0：TransactionScope 和自动刷新

发布于 2024-10-20 05:34:12 字数 970 浏览 0 评论 0原文

在 NHibernate 3.0 中，FlushMode.Auto 仅在环境事务下运行时（即不启动 NHibernate 事务）不起作用。应该吗？

using (TransactionScope scope = new TransactionScope()) 
{
    ISession session = sessionFactory.OpenSession();
    MappedEntity entity = new MappedEntity() { Name = "Entity", Value = 20 };
    session.Save(entity);

    entity.Value = 30;
    session.SaveOrUpdate(entity);

    // This returns one entity, when it should return none
    var list = session.
               CreateQuery("from MappedEntity where Value = 20").
               List<MappedEntity>();
}

（示例无耻地从这个相关问题窃取）

在NHibernate源代码中我可以看到它正在检查是否有正在进行的事务（在 SessionImpl.AutoFlushIfRequired 中），但相关方法 (SessionImpl.TransactionInProgress) 不考虑环境事务 - 与它的同类不同ConnectionManager.IsInActiveTransaction，它确实考虑环境事务。

原文

In NHibernate 3.0, FlushMode.Auto does not work when running under an ambient transaction only (that is, without starting an NHibernate transaction). Should it?

using (TransactionScope scope = new TransactionScope()) 
{
    ISession session = sessionFactory.OpenSession();
    MappedEntity entity = new MappedEntity() { Name = "Entity", Value = 20 };
    session.Save(entity);

    entity.Value = 30;
    session.SaveOrUpdate(entity);

    // This returns one entity, when it should return none
    var list = session.
               CreateQuery("from MappedEntity where Value = 20").
               List<MappedEntity>();
}

(Example shamelessly stolen from this related question)

In the NHibernate source I can see that's it's checking whether there's a transaction in progress (in SessionImpl.AutoFlushIfRequired), but the relevant method ( SessionImpl.TransactionInProgress) does not consider ambient transactions - unlike its cousin ConnectionManager.IsInActiveTransaction, which does consider ambient transactions.

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蛮可爱 2024-10-27 05:34:12

好消息。感谢 Jeff Sternal（他很好地识别了问题），我更新了 https://nhibernate.jira.com/browse/NH-3583 感谢 NH 工作人员的帮助，已经有了修复程序和拉取请求，因此在即将发布的 4.1.xx 版本中，此问题将得到修复.

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故人的歌 2024-10-27 05:34:12

您应该始终使用显式 NHibernate 事务。

using (TransactionScope scope = new TransactionScope()) 
using (ISession session = sessionFactory.OpenSession())
using (ITransaction transaction = session.BeginTransaction())
{
    //Do work here
    transaction.Commit();
    scope.Complete();
}

我看到你也在 NH 开发列表中写道 - 虽然这将来可能会改变，但这就是现在的运作方式。

You should use an explicit NHibernate transaction always.

using (TransactionScope scope = new TransactionScope()) 
using (ISession session = sessionFactory.OpenSession())
using (ITransaction transaction = session.BeginTransaction())
{
    //Do work here
    transaction.Commit();
    scope.Complete();
}

I see you also wrote in the NH dev list - while this can change in the future, that's how it works now.

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