Question

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

我有域对象PageRic，它有IList属性PageHeaders：

    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");
        }
}

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：索引超出了数组的范围。这是我在日志文件中得到的内容：

2012-04-18 15：00：38,823 [CurrentAppDomainHost.ExecuteNodes] DEBUG NHibernate.SQL - 选择 mcddistali1_.MCD_DIST_ID为y0_， mcddistali1_.SHORT_NAME为y1_， this_.RIC为y2_， this_.THROTTLE为y3_， this_.ROWSTAMPS为y4_， this_.RIC为y5_ 从 PAGE_RICS this_ 内部联接 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。 at NHibernate.Loader.Criteria.CriteriaLoader.GetResultColumnOrRow（Object [] row，IResultTransformer resultTransformer，IDataReader rs，ISessionImplementor session） at NHibernate.Loader.Loader.GetRowFromResultSet（IDataReader resultSet，ISessionImplementor session，QueryParameters queryParameters，LockMode [] lockModeArray，EntityKey optionalObjectKey，IList hydratedObjects，EntityKey [] keys，Boolean returnProxies）在NHibernate.Loader.Loader.DoQuery（ISessionImplementor session，QueryParameters queryParameters，Boolean returnProxies）在NHibernate.Loader.Loader.DoQueryAndInitializeNonLazyCollections（ISessionImplementor session，QueryParameters queryParameters，Boolean returnProxies）在NHibernate.Loader.Loader.DoList（ISessionImplementor session，QueryParameters queryParameters）

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

你能帮我找到解决这个问题的方法吗？

Nhibernate QueryOver的带有HasMany属性的SelectList

0 个答案: