NHibernate：延遲加載IUserType

假設我們有一個存儲客戶細節的系統和一個存儲員工細節的系統（假設情況！）。當EmployeeSystem訪問員工，客戶信息是從使用WCF的ClientSystem訪問，在IUserType實施：NHibernate：延遲加載IUserType

NHibernate的映射：

<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" 
    assembly="EmployeeSystem" namespace="EmployeeSystem.Entities"> 
    <class name="Employee" table="`Employee`" > 
     <id name="Id" column="`Id`" type="long"> 
     <generator class="native" /> 
     </id> 
     <property name="Name"/> 
     <property 
     name="Client" column="`ClientId`" 
     lazy="true" 
     type="EmployeeSystem.UserTypes.ClientUserType, EmployeeSystem" /> 
    </class> 
</hibernate-mapping>

IUserType實現：

public class ClientUserType : IUserType 
{ 
    ... 

    public object NullSafeGet(IDataReader rs, string[] names, object owner) 
    { 
     object obj = NHibernateUtil.Int32.NullSafeGet(rs, names[0]); 

     IClientService clientService = new ClientServiceClient(); 
     ClientDto clientDto = null; 

     if (null != obj) 
     { 
      clientDto = clientService.GetClientById(Convert.ToInt64(obj)); 
     } 

     Client client = new Client 
     { 
      Id = clientDto.Id, 
      Name = clientDto.Name 
     }; 

     return client; 
    } 

    ... 

}

即使我在該屬性上具有lazy =「true」，只要Employee被加載，它就會加載客戶端。這是正確的行爲？我是否必須在NullSafeGet中實現惰性加載，還是我錯過了某些東西？

來源

2011-09-02 Paul T Davies

向我們展示如何加載員工。 – Dmitry