NHibernate的版本3.3.1.4000的LINQ to NHibernate的 - .GroupBy()跳過()採取()導致異常
查詢:
IQueryable<Activity> activities = _repository.GetList<Activity>();
IQueryable<ActivityStatistic> statistics = activities
.GroupBy(activity => activity.ActivityLicense.SerialNumber)
.Select(grouping => new ActivityStatistic
{
ActivityCount = grouping.Count(),
LicenseCode = grouping.Key
})
.OrderBy(stat => stat.LicenseCode);
List<ActivityStatistic> result = statistics
.Skip(request.StartIndex)
.Take(request.Count)
.ToList();
如果我的評論跳過/送代碼,它的工作原理。正常。如何在不使用LINQ to NHibernate的OrderBy之後調用ToList()來協同工作?
在此先感謝。
更新:
例外:
The method or operation is not implemented.
at NHibernate.Linq.GroupBy.AggregatingGroupByRewriter.FlattenSubQuery(SubQueryExpression subQueryExpression, QueryModel queryModel)
at NHibernate.Linq.GroupBy.AggregatingGroupByRewriter.ReWrite(QueryModel queryModel)
at NHibernate.Linq.Visitors.QueryModelVisitor.GenerateHqlQuery(QueryModel queryModel, VisitorParameters parameters, Boolean root)
at NHibernate.Linq.NhLinqExpression.Translate(ISessionFactoryImplementor sessionFactory)
at NHibernate.Hql.Ast.ANTLR.ASTQueryTranslatorFactory.CreateQueryTranslators(String queryIdentifier, IQueryExpression queryExpression, String collectionRole, Boolean shallow, IDictionary`2 filters, ISessionFactoryImplementor factory)
at NHibernate.Engine.Query.QueryPlanCache.GetHQLQueryPlan(IQueryExpression queryExpression, Boolean shallow, IDictionary`2 enabledFilters)
at NHibernate.Impl.AbstractSessionImpl.GetHQLQueryPlan(IQueryExpression queryExpression, Boolean shallow)
at NHibernate.Impl.AbstractSessionImpl.CreateQuery(IQueryExpression queryExpression)
at NHibernate.Linq.DefaultQueryProvider.PrepareQuery(Expression expression, IQuery& query, NhLinqExpression& nhQuery)
at NHibernate.Linq.DefaultQueryProvider.Execute(Expression expression)
at NHibernate.Linq.DefaultQueryProvider.Execute[TResult](Expression expression)
at Remotion.Linq.QueryableBase`1.GetEnumerator()
at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)
at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)
at MBP.AuthorizationService.Logic.LicenseService.GetActivityStatistic(CommonRequest request, Int32& recordsCount) in D:\Projects\MBP.Launcher\MBP.AuthorizationService.Logic\LicenseService.cs:line 201
您可以發佈您的異常(內部異常/堆棧跟蹤)嗎? – 2012-08-09 09:00:43
我用它更新了身體 – 2012-08-09 09:05:30
這是一個我剛剛遇到的已知問題:https://nhibernate.jira.com/browse/NH-2566 – 2012-08-22 19:56:15