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我在使用 QueryOver 的 JoinAlias 和 List 属性的 SelectList 在 Nhibernate 中构建投影时遇到问题。

我有具有 IList 属性 PageHeaders 的域对象 PageRic：

    public class PageRic: AuditableLegacy
{
    public virtual string Ric { get; set; }
    public virtual McdDistId McdDistId {get; set; }
    public virtual IList<PageHeader> PageHeaders { get; set; }
    public virtual string Pointer { get; set; }
    public virtual bool Dup { get; set; }
    public virtual int Throttle { get; set; }
}

PageHeaders 属性映射为 HasMany：

        public class PageRicMapping : ClassMap<PageRic>
{
    public PageRicMapping()
    {
        Table("PAGE_RICS");
        Id(x => x.Ric, "RIC").Not.Nullable();

        References(x => x.McdDistId, "MCD_DIST_ID")
            .Not.LazyLoad()
            .Nullable();

        HasMany(x => x.PageHeaders)
            .KeyColumn("RIC")
            .Fetch.Subselect()
            .Inverse()
            .Cascade.AllDeleteOrphan()
            .Not.LazyLoad();

        Map(x => x.Pointer, "POINTER");
        Map(x => x.Dup, "DUP").Not.Nullable().CustomType<YesNoType>();
        Map(x => x.Throttle, "THROTTLE");
        }
}

当我执行此查询时：

            PageRicDTO pageRicDTO = null;
        McdDistId McdDistAlias = null;

        var results = Session.QueryOver<PageRic>()
            .JoinAlias(x => x.McdDistId, () => McdDistAlias)
            .SelectList(list => list
                                    .Select(x => McdDistAlias.Id).WithAlias(() => pageRicDTO.McdDistId)
                                    .Select(x => McdDistAlias.ShortName).WithAlias(() => pageRicDTO.McdDistName)
                                    .Select(x => x.Ric).WithAlias(() => pageRicDTO.Ric)
                                    .Select(x => x.Throttle).WithAlias(() => pageRicDTO.Throttle)                                        
                                    .Select(x => x.Rowstamps).WithAlias(() => pageRicDTO.Rowstamps)                                        
                                    .Select(x => x.PageHeaders).WithAlias(() => pageRicDTO.PageHeaders)
            )
            .TransformUsing(Transformers.AliasToBean<PageRicDTO>())
            .List<PageRicDTO>();

我得到 IndexOutOfRangeException: Index was outside the bounds of the array。这是我在日志文件中得到的内容：

2012-04-18 15:00:38,823 [CurrentAppDomainHost.ExecuteNodes] 调试 NHibernate.SQL - 选择 mcddistali1_.MCD_DIST_ID 作为 y0_，mcddistali1_.SHORT_NAME 作为 y1_，this_.RIC 作为 y2_，this_.THROTTLE 作为 y3_，this_.ROWSTAMPS 作为 y4_ , this_.RIC as y5_ FROM PAGE_RICS this_ inner join MCD_DIST_IDS mcddistali1_ on this_.MCD_DIST_ID=mcddistali1_.MCD_DIST_ID

2012-04-18 15:00:39,306 [CurrentAppDomainHost.ExecuteNodes] WARN NHibernate.Util.ADOExceptionReporter - System.IndexOutOfRangeException：索引超出了数组的范围。在 NHibernate.Loader.Criteria.CriteriaLoader.GetResultColumnOrRow(Object[] row, IResultTransformer resultTransformer, IDataReader rs, ISessionImplementor session) 在 NHibernate.Loader.Loader.GetRowFromResultSet(IDataReader resultSet, ISessionImplementor session, QueryParameters queryParameters, LockMode[] lockModeArray, EntityKey optionalObjectKey , IList hydradObjects, EntityKey[] 键, Boolean returnProxies) 在 NHibernate.Loader.Loader.DoQuery(ISessionImplementor session, QueryParameters queryParameters, Boolean returnProxies) 在 NHibernate.Loader.Loader.DoQueryAndInitializeNonLazyCollections(ISessionImplementor session, QueryParameters queryParameters,

当我注释掉 .Select(x => x.PageHeaders).WithAlias(() => pageRicDTO.PageHeaders) 时，我得到了 DTO 对象。

你能帮我找到这个问题的解决方案吗？

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