3

我有一个与 VesselDetail 对象具有一对多关系的 Vessel 对象。当我将 VesselDetail 对象添加到 Vessel 对象并尝试保存 Vessel 对象时，似乎 NHibernate 在插入 VesselDetail 对象时没有添加外键。

我在哪里错了？我就是想不通。

错误消息：BDN.FindVessel.Tests.Integration.NhibernateRepositoryTests.SaveVessel_ShouldAddDetailsToDb_WhenAddedToEntity：NHibernate.Exceptions.GenericADOException：无法插入：[BDN.FindVessel.Domain.VesselDetail][SQL：INSERT INTO BoatsDetails（SaftyGear、OtherMachineryAndGear、材料、尺寸、各种, TranslatorId, SpeenAndConsumption, MainMachinery, Created, Class, Capasities, Culture, Interior, Electronics, DeckGear) 值 (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ? , ?); 选择 SCOPE_IDENTITY()] ----> System.Data.SqlClient.SqlException：无法将值 NULL 插入到列“BoatId”、表“FindVesselTest.dbo.BoatsDetails”中；列不允许空值。插入失败。该语句已终止。

public class Vessel
{
        public virtual int BoatId { get; set; }
        public virtual IList<VesselDetail> Details { get; set; }
        //...
}

public class VesselDetail
{
        public virtual int VesselDetailId { get; set; }
        //some other properties
        //..
}

public class VesselMap: ClassMap<Vessel>
{
    public VesselMap()
    {
        WithTable("Boats");

        Id(x => x.BoatId, "Id");

        //..

        HasMany(x => x.Details)
            .WithKeyColumn("BoatId") //foreign key in the BoatsDetails table
            .Cascade.All();
    }
}

public class VesselDetailMap:ClassMap<VesselDetail>
{
  public VesselDetailMap()
  {
      WithTable("BoatsDetails");

      Id(x => x.VesselDetailId, "Id");

      //...
  }
}
4

1 回答 1

10

看来我缺少一些基本的 NHibernate 技能。稍微阅读一下，似乎您需要让子对象负责一对多关系。

这解决了我的问题：

public class VesselMap: ClassMap<Vessel>
{
    public VesselMap()
    {
        //...

        HasMany(x => x.Details)
                .Inverse()
                .WithKeyColumn("BoatId");
    }
}

public class VesselDetailMap:ClassMap<VesselDetail>
{
  public VesselDetailMap()
  {
      //..

       References(x => x.Vessel, "BoatId")
                .Cascade
                .SaveUpdate();
  }
}
于 2009-02-17T13:21:53.583 回答