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在我的項目中，所有的實體都有複合主鍵[systemId只要，deviceId只要，id一樣長]。在保存實體之前，手動填寫值。 我正在使用「代碼優先」的方法，並提供簡單的引用NHibernate.Mapping.Attributes擴展來定義具有屬性的模式，就像在基於Java的Hibernate中一樣。NHibernate複合標識映射問題，雙向/單向OneToMany，ManyToOne和ManyToMany
所有實體具有一個抽象基類，其提供共享屬性和功能：
[Serializable]
public abstract class EntityBase
{
[CompositeId(0, Name = "id", ClassType = typeof(EntityId))]
[KeyProperty(1, Name = "systemId", Column = "restId")]
[KeyProperty(2, Name = "deviceId", Column = "deviceId")]
[KeyProperty(3, Name = "id", Column = "id")]
private EntityId id = new EntityId(); // this is a component, see below
[Property(Column = "isDeleted", NotNull = true)]
private bool deleted = false;
public EntityId Id
{
get { return id; }
set { id = value; }
}
public bool Deleted
{
get { return deleted; }
set { deleted = value; }
}
}
複合ID後面有一個部件，它代表了複雜的主鍵：
[Serializable]
[Component]
public class EntityId
{
[Property(Column = "restId", NotNull = true)]
private long systemId = 0;
[Property(NotNull = true)]
private long deviceId = 0;
[Property(NotNull = true)]
private long id = 0;
public long SystemId
{
get { return systemId; }
set { systemId = value; }
}
public long DeviceId
{
get { return deviceId; }
set { deviceId = value; }
}
public long Id
{
get { return id; }
set { id = value; }
}
}
我definied稱爲OTMList和OTMItem的兩個實體具有彼此的雙向OneToMany和ManyToOne關聯。
[Serializable]
[Class]
public class OTMList : EntityBase
{
[List(0, Cascade = "none", Generic = true, Lazy = CollectionLazy.True)]
[Key(1, Column = "id")]
[Index(2, Column = "id")]
[OneToMany(3, NotFound = NotFoundMode.Exception, ClassType = typeof(OTMItem))]
private IList<OTMItem> otmItems = new List<OTMItem>();
public IList<OTMItem> OTMItems
{
get { return otmItems; }
set { otmItems = value; }
}
}
[Serializable]
[Class]
public class OTMItem : EntityBase
{
[ManyToOne(0, Name = "otmList", ClassType = typeof(OTMList), Column = "OTMListId", Cascade = "none", Lazy = Laziness.Proxy)]
private OTMList otmList = null;
public OTMList OTMList
{
get { return otmList; }
set { otmList = value; }
}
}
Hibernate映射XML文件包含以下信息：
<?xml version="1.0" encoding="utf-8"?>
<hibernate-mapping default-access="field" auto-import="true" assembly="NHibernateTest, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" xmlns="urn:nhibernate-mapping-2.2">
<class name="NHibernateTest.ListTest.OTM.OTMList, NHibernateTest">
<composite-id class="NHibernateTest.Domain.EntityId, NHibernateTest" name="id">
<key-property name="systemId" column="restId" />
<key-property name="deviceId" column="deviceId" />
<key-property name="id" column="id" />
</composite-id>
<property name="deleted" column="isDeleted" not-null="true" />
<list name="otmItems" lazy="true" cascade="none" generic="true">
<key column="id" />
<index column="id" />
<one-to-many class="NHibernateTest.ListTest.OTM.OTMItem, NHibernateTest" not-found="exception" />
</list>
</class>
<class name="NHibernateTest.ListTest.OTM.OTMItem, NHibernateTest">
<composite-id class="NHibernateTest.Domain.EntityId, NHibernateTest" name="id">
<key-property name="systemId" column="restId" />
<key-property name="deviceId" column="deviceId" />
<key-property name="id" column="id" />
</composite-id>
<property name="deleted" column="isDeleted" not-null="true" />
<many-to-one name="otmList" class="NHibernateTest.ListTest.OTM.OTMList, NHibernateTest" column="OTMListId" cascade="none" lazy="proxy" />
</class>
</hibernate-mapping>
當我驗證與NHibernate的，我得到以下異常的SchemaValidator模式：
Foreign key (FKF208BF0B9A2FCB3:OTMItem [OTMListId])) must have same number of columns as the referenced primary key (OTMList [restId, deviceId, id])
的問題是當我嘗試創建單向ManyToOne或雙向/單向ManyToMany關聯時也是如此。
有人可以幫我嗎？
完整的源代碼可在這裏：