ActiveRecord 3 RC 1与NHibernate 3.2一起导致意外异常

Question

因为前几天我觉得很冒险，所以我决定用ActiveRecord 3 RC 1编译NHibernate 3.2，看看会发生什么。

除了我修复的中断更改之外，我还遇到了一个关于SessionScopes和Linq查询的非常奇怪的行为。

通常，在使用Linq查询时，我不必使用会话范围，但是在用ActiveRecord 3 RC 1编译NHibernate 3.2之后，我得到了以下错误：

Could not found a registered Scope. Linq queries needs a underlying a scope to be functional.
Stack Trace:    at Castle.ActiveRecord.Framework.ActiveRecordLinqBase`1.get_Queryable()
   at Castle.ActiveRecord.Framework.ActiveRecordLinq.AsQueryable[T]()
   at Danel.Nursing.Scheduling.Actions.DataServices.BranchDataService.GetBranches() in D:\Work\Default\Scheduling\Danel.Nursing.Scheduling.Actions\DataServices\BranchDataService.cs:line 21
   at Danel.Nursing.Scheduling.Controllers.SmallHoursAmountController.<>c__DisplayClassb.<SetBranches>b__a() in D:\Work\Default\Scheduling\Danel.Nursing.Scheduling\Controllers\SmallHoursAmountController.cs:line 275
   at Danel.Nursing.Scheduling.Viewlets.WaitForAction.Worker_DoWork(Object sender
DoWorkEventArgs e) in D:\Work\Default\Scheduling\Danel.Nursing.Scheduling\Viewlets\WaitForAction.cs:line 40

似乎这个错误是从这里来的：

public class ActiveRecordLinqBase<T> : ActiveRecordBase<T>
{
        public static IOrderedQueryable<T> Queryable
        {
            get
            {
                var activeScope = holder.ThreadScopeInfo.GetRegisteredScope(); // The registered scope is null...

                if (activeScope == null)
                    throw new ActiveRecordException("Could not found a registered Scope. Linq queries needs a underlying a scope to be functional.");

                var key = holder.GetSessionFactory(typeof(T));

                var session = activeScope.IsKeyKnown(key) ? activeScope.GetSession(key) : SessionFactoryHolder.OpenSessionWithScope(activeScope, key);

                return session.AsQueryable<T>();
            }
        }
    }

现在我必须打开一个新的SessionScope

Answer 1

我在Queryable函数上也遇到了麻烦。虽然我没有会话范围问题，但我无法将更新保存到IQueryable检索的对象。新的会议似乎从未在活动范围内登记过。我还更改了范围检索，因此这可能对您也有帮助：

   public new IOrderedQueryable<T> Queryable
    {
        get
        {
            ISessionFactory key = ActiveRecordMediator<T>.GetSessionFactoryHolder().GetSessionFactory(typeof(T));
            ISessionScope activeScope = SessionScope.Current;

            if (activeScope == null)
                throw new ActiveRecordException("Could not found a registered Scope. Linq queries needs a underlying a scope to be functional.");

            var session = activeScope.IsKeyKnown(key) ? activeScope.GetSession(key) : OpenSessionWithScope(activeScope, key);

            if (!activeScope.IsKeyKnown(key))
            {
                activeScope.RegisterSession(key,session);
            }
            return session.AsQueryable<T>();
        }
    }