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我使用nhibernate子類映射來處理系統對象的描述。基本的想法是有一個描述類,並通過具有特定於該對象的子類來進行多態關聯。我的代碼將描述數據正確插入數據庫;這意味着我在插入數據時正確創建了ownerid和ownertype列。Nhibernate子類映射問題
但是,當我使用nhibernate.load()加載Foo對象時,nhibernate沒有使用OwnerType列來查詢Foo的描述 - 它僅僅使用ownerId列查詢描述表,因爲可能有其他行該表具有相同的id但與不同的ownertype關聯。
你能幫我找到它爲什麼不包含ownerType的負載查詢描述,我該如何解決這個問題?謝謝!
public class Product : EntityBase
{
public virtual string Name { get; set; }
public virtual IList<ProductDescription> Descriptions { get; set; }
}
public class ProductDescription : Description
{
public virtual Product Product { get; set; }
}
public class Description : EntityBase
{
public virtual string Name { get; set; }
public virtual string ShortDescription { get; set; }
public virtual string LongDescription { get; set; }
}
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" namespace="Test.Domain" assembly="Test.Domain">
<class name="Test.Domain.Product, Test.Domain" table="Products">
<id name="ID" column="ID" type="Int32" unsaved-value="0">
<generator class="native" />
</id>
<property name="Name" />
<bag name="Descriptions" inverse="true" cascade="all">
<key column="OwnerID" />
<one-to-many class="Test.Domain.ProductDescription, Test.Domain" />
</bag>
</class>
</hibernate-mapping>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" namespace="Test.Domain" assembly="Test.Domain">
<class name="Test.Domain.Description, Test.Domain" table="Descriptions" discriminator-value="0">
<id name="ID" column="ID" type="Int32" unsaved-value="0">
<generator class="native" />
</id>
<discriminator column="OwnerType" />
<property name="Name" />
<property name="ShortDescription" />
<property name="LongDescription" />
<subclass name="Test.Domain.ProductDescription, Test.Domain" discriminator-value="1">
<many-to-one name="Product" class="Test.Domain.Product, Test.Domain" column="OwnerID" not-null="true"></many-to-one>
</subclass>
</class>
</hibernate-mapping>
這個工作。謝謝 – kaivalya 2009-11-08 14:28:22
像魅力一樣工作,謝謝! – 2012-08-10 09:01:51