NHibernate:非法尝试将一个集合与两个打开的会话相关联 [英] NHibernate: Illegal attempt to associate a collection with two open sessions

问题描述

我在使用NHibernate时遇到了麻烦，首先让我说我不是母语为英语的人，好吧，让我们指出一下.

I'm having trouble with NHibernate, First let me say I'm not native English talker, OK, let get to point.

当我遇到此错误时，我在互联网上进行搜索，看到很多人在谈论它，但是其中大多数人都具有级联属性的问题，如果我想说的话，完全不符合我的情况，甚至我无法通过.

As i face this error, i searched over the internet, and saw lot of people talking about it, but most of them had issue with cascade attribute, and totally if i wanna say, non matched my case, or even if it did i couldn't get through.

我的数据库很小，但是有点复杂. 我的模型文件是使用Entity Developer生成的.

My Database is so small, but a bit complex. My model files generated using Entity Developer.

如您所见，存在继承关系，一对多关系和多对多关系船，

As you can see there is inheritance, one-to-many and many-to-many relation ships,

由于我是NHibernate的新手，所以我编写了一个测试代码，我的常规测试成功了，直到我添加了这个多对多关系.

As I am new to NHibernate, i write a test code, my normal test worked, till i add this many-to-many relation ship.

所以我写这段代码:

//Owner o = new Owner
        //{
        //    //OwnerId = Guid.NewGuid(),
        //    CellPhone1 = null,
        //    CellPhone2 = "09132198895",
        //    Phone = "03114335502",
        //    Firstname = "Hassan",
        //    Lastname = "Faghihi",
        //    OwnerTitle = PersonTitle.Mr
        //};

        //OwnerFactory ownerFactory = new OwnerFactory();
        //ownerFactory.SaveOwner(o);

        //SellHouse sh = new SellHouse
        //{
        //    //ItemId = Guid.NewGuid(),
        //    Owner = o,
        //    Address = "dsasd",
        //    BuildYear = 1393,
        //    City = "Isfahan",
        //    Code = "A-512",
        //    Country = "Iran",
        //    Description = "Nothing",
        //    Dimensions = "4X5",
        //    Directions = Directions.North | Directions.South,
        //    Document = "dasd",
        //    Exchange = true,
        //    Facilities = Facilities.Elevator | Facilities.KichenMdfService | Facilities.Parking | Facilities.Warehouse,
        //    Floor = 4,
        //    HasYard = false,
        //    HouseType = HouseType.Apartment,
        //    IssueDate = DateTime.Now,
        //    Loan = 3124,
        //    Meter = 130,
        //    NumberOfBlocks = 4,
        //    NumberOfFloors = 0,
        //    OtherFacilities = "Nothing",
        //    Rooms = 2,
        //    ShareOfSixPart = 4.2f,
        //    State = "Isfahan",
        //    District = "kaveh",
        //    ExchangeDescription = "",
        //    Images = null,
        //    IsRented = false,
        //    Maps = null,
        //    MortgagePayed = 0,
        //    Price = 2222222,
        //    RentAmount = 0,
        //    Substructure = 4,
        //};

        GalleryFactory galleryFactory = new GalleryFactory();

        Gallery g = new Gallery
        {
            Image = Properties.Resources.jeans_texture03.ToByte()
        };

        galleryFactory.SaveGallery(g);

        SellHouseFactory sellHouseFactory = new SellHouseFactory();
        //factory.SaveSellHouse(sh);

        HashSet<Gallery> galleries = new HashSet<Gallery>();
        galleries.Add(g);

        SellHouse sellHouse = sellHouseFactory.GetSellHouses().FirstOrDefault();
        if (sellHouse != null)
        {
            comboBox1.SelectedIndex = (int)sellHouse.Owner.OwnerTitle;
            textBox1.Text = sellHouse.Owner.Firstname+sellHouse.Owner.Lastname;
            //sellHouse.Images = galleries;

            sellHouseFactory.SaveSellHouse(sellHouse);
        }

我创建了一个Owner对象，然后保存它，并将其传递给sellHouse，并将Images and Maps(这是我的多对多关系)设置为null. 因此，sellHouse已创建. 然后我想知道如何在我的SellHouse中添加图片或地图， 因此，我将包含一个图库元素的列表传递给sellHouse Maps属性. 并生成非法尝试将一个收藏与两个打开的会话相关联"，首先，尽管我的原因是因为我的图库没有通过保存才被卖出，所以我按照代码上的说明做了，并且做了手动操作. 但是它仍然继续产生该错误...

i create an object of Owner, then save it, and pass it to sellHouse, and set Images and Maps (which are my many-to-many relation) to null. so the sellHouse Created. then i was wonder how to add image or map to my sellHouse, So i pass a list containing one gallery element to sellHouse Maps property. And it generate "Illegal attempt to associate a collection with two open sessions", first i though the reason is because my Gallery didn't saved before i pass it to sell house, so i did as you can see on my code, and did it manually. But it still keep on generating that error...

我提供了必需的文件，因此，您可以设置示例并更好地理解我的代码.

I provide required file so, you can set up an example and understand my code better.

我非常渴望听到您的回答，因为我的双手与我对Hibernate和NHibernate的一点了解联系在一起.

I'm very eager to hear your answer,cause my hands are tied do to my little knowledge over Hibernate and NHibernate.

DropBox中的来源:

Sources in DropBox:

在此处输入链接描述

推荐答案

可能在您所有的工厂方法中都打开了一个新会话. 但是您只需要在每个线程(或事务)中打开一个会话即可.

Probably in all of your factory method you open a new session. But you have to open just one session in every thread (or transaction).

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