Fluent NHibernate和具有单个列名的复合ID

我已经在FNH谷歌集团发布了这篇文章，但独家报道如下：

我在遗留数据库中有一个表，它有一个复合ID PK是隐含的，因为表实际上没有定义PK，但是 自然PK是WORKORDERID和IMAGEPATH的组合 栏目：

我定义了这个类映射：

   /// <summary>
   /// NHibernate mapping for workorder attachments
   /// </summary>
   public class AttachmentMap : ClassMap<Attachment>
   {
       public AttachmentMap()
       {
           SchemaIs(Resources.DatabaseSchema);
           WithTable(ObjectNames.TableWorkorderAttachment);
           UseCompositeId()
               .WithKeyProperty(x => x.ParentId, "WORKORDERID")
               .WithKeyProperty(x => x.FileLocation, "IMAGEPATH");
           Map(x => x.AttachedByUser, "ATTACHEDBY").WithLengthOf(100).Nullable();
           Map(x => x.AttachedOn, "DATETIMEATTACHED").Nullable();
           Map(x => x.Comments).Nullable().WithLengthOf(256);
           References(x => x.ParentWorkorder).FetchType.Join();
       }
   }

现在我知道我应该在 引用行的类映射。排除了它，我得到了 预期错误：

NHibernate: INSERT INTO azteca.WorkOrderImg (ATTACHEDBY,
DATETIMEATTACHED, Comments, ParentWorkorder_id, WORKORDERID,
IMAGEPATH) VALUES (@p0, @p1, @p2, @p3, @p4, @p5);@p0 = 'SYSTEM', @p1 = 3/15/2009 12:00:00 AM, @p2 = 'Some comment', @p3 = NULL, @p4 = NULL, @p5 = 'some ile\location'

System.Data.SqlClient.SqlException: Invalid column name 'ParentWorkorder_id'.

然而，当我把它包括进来时，我会很流利地尝试添加 将WORKORDERID列添加到查询中两次：

System.IndexOutOfRangeException: Invalid index 5 for this SqlParameterCollection with Count=5.

我一直在尝试我能想到的每一种组合，但都没有用。我是 使用以下代码测试映射：

       [Test]
       public void Can_persist_an_attachment()
       {
           var sf = ObjectFactory.GetNamedInstance<ISessionFactory>   (ObjectMother.Datasource);

           using (ISession session = sf.OpenSession())
           {
               new PersistenceSpecification<Attachment>(session)
                   .CheckProperty(x => x.AttachedByUser, "SYSTEM")
                   .CheckProperty(x => x.AttachedOn, new DateTime(2009, 3, 15))
                   .CheckProperty(x => x.Comments, "Some comment")
                   .CheckProperty(x => x.FileLocation, "some\file\\location")
                   .VerifyTheMappings();
           }
       }

[测试]
public void可以保存\u附件（）
{
var sf=ObjectFactory.GetNamedInstance（ObjectMother.Datasource）；
使用（ISession session=sf.OpenSession（））
{
新PersistenceSpecification（会话）
.CheckProperty（x=>x.AttachedByUser，“系统”）
.CheckProperty（x=>x.AttachedOn，新日期时间（2009,3,15））
.CheckProperty（x=>x.Comments，“一些注释”）
.CheckProperty（x=>x.FileLocation，“some\file\\location”）
.验证应用程序（）；
}
}

---

感谢您的帮助。

解决了这个问题。您不需要为父对象添加引用属性。请注意，调整后的映射中缺少多对一：

public AttachmentMap()
{
    SchemaIs(Resources.CityworksDatabaseSchema);
    WithTable(ObjectNames.TableWorkorderAttachment);
    UseCompositeId()
        .WithKeyReference(x => x.ParentWorkorder, "WORKORDERID")
        .WithKeyProperty(x => x.FileLocation, "IMAGEPATH");
    Map(x => x.AttachedByUser, "ATTACHEDBY").WithLengthOf(100).Nullable();
    Map(x => x.AttachedOn, "DATETIMEATTACHED").Nullable();
    Map(x => x.Comments).Nullable().WithLengthOf(256);
    //References(x => x.ParentWorkorder, "WORKORDERID").FetchType.Join();
}

这将生成以下HBM映射文件。修复方法是让复合id有一个键多对一行指向父类。现在我可以坚持我的附件类

<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" default-access="">
  <class name="Woolpert.Cityworks.Core.Entities.Azteca.Attachment, Woolpert.Cityworks.Core, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" table="WorkOrderImg" xmlns="urn:nhibernate-mapping-2.2" schema="azteca">
    <composite-id>
      <key-many-to-one class="Woolpert.Cityworks.Core.Entities.Azteca.Workorder, Woolpert.Cityworks.Core, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" name="ParentWorkorder" column="WORKORDERID" />
      <key-property type="String" name="FileLocation" column="IMAGEPATH" />
    </composite-id>
    <property name="AttachedByUser" type="String">
      <column name="ATTACHEDBY" length="100" not-null="false" />
    </property>
    <property name="AttachedOn" type="System.Nullable`1[[System.DateTime, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]]">
      <column name="DATETIMEATTACHED" not-null="false" />
    </property>
    <property name="Comments" type="String">
      <column name="Comments" length="256" not-null="false" />
    </property>
  </class>
</hibernate-mapping>

public AttachmentMap()
{
    SchemaIs(Resources.CityworksDatabaseSchema);
    WithTable(ObjectNames.TableWorkorderAttachment);
    UseCompositeId()
        .WithKeyReference(x => x.ParentWorkorder, "WORKORDERID")
        .WithKeyProperty(x => x.FileLocation, "IMAGEPATH");
    Map(x => x.AttachedByUser, "ATTACHEDBY").WithLengthOf(100).Nullable();
    Map(x => x.AttachedOn, "DATETIMEATTACHED").Nullable();
    Map(x => x.Comments).Nullable().WithLengthOf(256);
    //References(x => x.ParentWorkorder, "WORKORDERID").FetchType.Join();
}

<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" default-access="">
  <class name="Woolpert.Cityworks.Core.Entities.Azteca.Attachment, Woolpert.Cityworks.Core, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" table="WorkOrderImg" xmlns="urn:nhibernate-mapping-2.2" schema="azteca">
    <composite-id>
      <key-many-to-one class="Woolpert.Cityworks.Core.Entities.Azteca.Workorder, Woolpert.Cityworks.Core, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" name="ParentWorkorder" column="WORKORDERID" />
      <key-property type="String" name="FileLocation" column="IMAGEPATH" />
    </composite-id>
    <property name="AttachedByUser" type="String">
      <column name="ATTACHEDBY" length="100" not-null="false" />
    </property>
    <property name="AttachedOn" type="System.Nullable`1[[System.DateTime, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]]">
      <column name="DATETIMEATTACHED" not-null="false" />
    </property>
    <property name="Comments" type="String">
      <column name="Comments" length="256" not-null="false" />
    </property>
  </class>
</hibernate-mapping>