WCF RIA SubmitChanges不会将主属性发送回服务器端 [英] WCF RIA SubmitChanges doesn't send master properties back to the server side

问题描述

看，我有这些非常简单的模型Master-Detail:

Look, I have these pretty simple model Master-Detail:

手是手指的大师(手指是手的细节)

Hand is master of Fingers (finger is a detail of hand)

所以在客户端:

Hand hand = domainService.Hands[0];                 //  get some hand, doesn't matter
...
Finger f = new Finger() { f.Id = Guid.NewId() };
f.Hand = hand;                                      //  make connection !!
domainService.Fingers.Add(f);
domainService.SubmitChanges(OnSubmitCompleted, null);   //  error is here

在服务器端:

public void Insert<T>(T obj)
{
    try
    {
        using (ISession session = _factory.OpenSession())
        using (ITransaction transaction = session.BeginTransaction())
        {
            session.SaveOrUpdate(obj);   //  NHibernate error: not-null property references a null or transient value
            transaction.Commit();
        }
    }
    catch (Exception ex)
    {
        throw ;
    }
}

问题实际上是关于不通过WCF导线发送回关联.因此，在服务器端，Hand属性为NULL，但不应(违反)-我只想刷新一下finger.Hand属性

The problem actually is about not sending associations back via WCF wire. So On the server side the Hand property is NULL, but it shouldn't (violation) - I just want to refresh my finger.Hand property

这甚至都不是构图-我不需要这种限制的原因

It's not even a composition - I don't need this cause of its limitations

这是metaAttribute类:

here is the metaAttribute class:

    [MetadataType(typeof(Finger.FingerMetadata))]
public partial class Finger
{
    //[Required(AllowEmptyStrings = true)]
    //[Exclude]
    public virtual Guid HandID { get; set; }
    //{
    //    get { return Hand.Id; }
    //}

    internal sealed class FingerMetadata
    {
        [Key]
        public Guid Id  { get; set; }

        [Include]
        //[RoundtripOriginal]
        //[ExternalReference]
        [Association("Finger-Hand", "HandID", "Id")]
        //[ConcurrencyCheck]
        //[Composition]
        public Hand Hand { get; set; }
    }
}

[MetadataType(typeof(Hand.HandMetadata))]
public partial class Hand
{
    internal sealed class HandMetadata
    {
        [Key]
        public Guid Id  { get; set; }

        [Include]
        //[ExternalReference]
        [Association("Hand-Finger", "Id", "HandID")]
        //[Composition]
        public IList<Finger> Fingers { get; set; }
    }
}

我在这里看到了相同的问题 http://forums.silverlight.net/forums/p/205220/480824.aspx ，但没人知道. 请帮忙！

I saw the same problem here http://forums.silverlight.net/forums/p/205220/480824.aspx, but nobody knows.. Please help!

谢谢！

推荐答案

如果您仍在使用RIA服务(而非数据服务)寻求帮助

If you are still looking for help with this using RIA services (as opposed to Data services)

最近，我已经在这两种技术上进行了相当多的工作，并且在您上面发布的SL论坛链接中提供了一些信息:

I've worked quite a bit with these 2 technologies in the recent past and I provided some information on the SL forums link you posted above:

一对多关联在服务器端为空" (forums.silverlight.net)

"One to many association is null on Server side" (forums.silverlight.net)

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