关于 Nhinernate 的one to one(转载)

public class Document {
    public virtual  int Id { get; set; }
    public virtual  string Name { get; set; }
    public virtual  DocumentFile DocumentFile { get; set; }   
}
 public class DocumentFile {
    public virtual int Id { get; set; }
    public virtual Document Document { get; set; }
    public virtual byte[] Data { get; set; }    
}


//配置文件。
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2">
  <class name="NHibernateDocumentTest.Document, NHibernateDocumentTest" table="Documents" lazy="false">
    <id name="Id" column="Id" type="integer">
      <generator class="native" />
    </id>
    <property name="Name" column="Name" type="string" />
    <many-to-one name="DocumentFile" cascade="all-delete-orphan" 
                 lazy="proxy" column="DocumentFileId" unique="true" />
  </class>
</hibernate-mapping>
 
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2">
  <class name="NHibernateDocumentTest.DocumentFile, NHibernateDocumentTest" table="DocumentFiles" lazy="true">
    <id name="Id" column="Id" type="integer">
      <generator class="native" />
    </id>   
    <property name="Data" column="Data" type="Byte[]" />
    <one-to-one name="Document" constrained="true" property-ref="DocumentFile" />
  </class>
</hibernate-mapping>
 
//终于搞定。