Question

[Test]
public void Artist_gets_stored_properly()
{
    using (ISession session = NHHelper.GetSession())
    {
        Artist artist = new Artist() { Name = "Somathilaka Jayamaha" };

        artist.Songs = new List<Song>()
        {
            new Song(){Artist = artist, Name = "Manamaala girawu"},
            new Song(){Artist = artist, Name = "Sende andura"},
            new Song(){Artist = artist, Name = "Sunilwan nuwan"}
        };

        foreach (var s in artist.Songs)
        {
            session.Save(s);
        }
        session.Save(artist);
    }

    using (ISession session = NHHelper.GetSession())
    {
        Artist artist = session.Query<Artist>().Single(x => x.Name == "Somathilaka Jayamaha");
        Assert.AreEqual(3, artist.Songs.Count);
        Assert.AreEqual("Sende andura", artist.Songs[1].Name);
    }
}

public class Artist
    {
        public virtual int Id { get; set; }
        public virtual string Name { get; set; }
        public virtual IList<Song> Songs { get; set; }
    }

    public class Song
    {
        public virtual int Id { get; set; }
        public virtual string Name { get; set; }
        public virtual string WebPath { get; set; }
        public virtual string FilePath { get; set; }
        public virtual bool Downloaded { get; set; }
        public virtual Artist Artist { get; set; }

        void Download(IDownloader downloader)
        {
        }
    }

我有上述测试用例，但在此行失败：Assert.AreEqual(3, artist.Songs.Count);。这些歌似乎没有得到保存。我使用自动化并在映射覆盖的集合字段中使用Cascade.All()并关闭延迟。我无法理解为什么这个测试失败了。正如您所看到的，我手动保存了3首歌曲，但据我所知，当Cascade.All() Artist.Songs字段为{{1}}时，我不需要这样做。有人能告诉我我做错了什么吗？谢谢。

MS SQLServer 2005，.NET 3.5，FluentNHibernate 1.2.0.712

Answer 1

您没有使用交易，而且您永远不会刷新您的会话。

获取插入的唯一原因是因为您使用的是identity生成器，当您调用Save时会插入该生成器（这是一个限制，而不是一个功能））。

正确的方法：

using (ISession session = NHHelper.GetSession())
using (var transaction = session.BeginTransaction())
{
    Artist artist = new Artist { Name = "Somathilaka Jayamaha" };

    artist.Songs = new List<Song>()
    {
        new Song{Artist = artist, Name = "Manamaala girawu"},
        new Song{Artist = artist, Name = "Sende andura"},
        new Song{Artist = artist, Name = "Sunilwan nuwan"}
    };

    session.Save(artist);
    transaction.Commit();
}

对象未在数据库中正确保存

1 个答案: