c# - 是否有必要在交易中包装 nHibernate future ？

Question

是否有必要在事务中包装 nHibernate future ？

如:

using (var s = sf.OpenSession())
using (var tx = s.BeginTransaction())
{
    var blogs = s.CreateCriteria<Blog>()
        .SetMaxResults(30)
        .List<Blog>();
    var countOfBlogs = s.CreateCriteria<Blog>()
        .SetProjection(Projections.Count(Projections.Id()))
        .UniqueResult<int>();

    Console.WriteLine("Number of blogs: {0}", countOfBlogs);
    foreach (var blog in blogs)
    {
        Console.WriteLine(blog.Title);
    }

    tx.Commit();
}

从这里开始:

https://ayende.com/blog/3979/nhibernate-futures

我看不出这样做的理由。它是选择而不是插入或更新等。

Answer 1

当 NHibernate 查询未显式包装在事务中时，它被称为“隐式事务”，这是不鼓励的，并且具有各种含义，包括使二级缓存无效。这一切都在这里解释:

https://hibernatingrhinos.com/Products/nhprof/learn#DoNotUseImplicitTransactions

节选:

Even if we are only reading data, we should use a transaction, because using transactions ensures that we get consistent results from the database. NHibernate assumes that all access to the database is done under a transaction, and strongly discourages any use of the session without a transaction.