2010-01-11 115 views
1

問題我已經有很多ClassB的元素ClassA的:NHibernate的 - 與預先加載

public abstract class ClassA: IEntity<ClassA> 
{ 
    public virtual IList<ClassB> ClassBList { get; protected set; } 
    ... 
} 

然後ClassB的引用ClassC元素:

public class ClassB 
{ 

    public ClassC CEntity { get; private set; } 

    public Percentage Percentage{ get; private set; } 
    ... 
} 

這裏是ClassA的映射(ClassB的無映射):

 HasMany(a => a.ClassBList).Component(a => 
     { 
      a.References(b => b.CEntity , "IDCEntity").ForeignKey("ID").Cascade.SaveUpdate().Not.LazyLoad(); 
      t.Map(b => b.Percentage, "Percentage"); 
      ...; 
     }).AsBag().Cascade.AllDeleteOrphan().Not.LazyLoad() 

當我從數據庫中獲取所有classA元素時,它將ClassBi中的所有ClassB st加載,但它不會加載ClassB中的ClassC元素。

我嘗試以下HQL:

   var query = session.CreateQuery("select a from ClassA as a left join fetch a.ClassBList as b left join fetch b.CEntity as c"); 

      classAList = query.List<ClassA>(); 

,但我得到這個錯誤:

Exception = {"Query specified join fetching, but the owner of the fetched association was not present in the select list [FromElement{explicit,not a collection join,fetch join,fetch non-lazy properties,classAlias=c,role=,tableName=ClassCTable,tableAlias=classc2_,or...

我想這是因爲我試圖CLASSB的渴望負荷ClassC元素,但CLASSB是不在hte選擇列表中。

什麼是替代方案,或正確的HQL?

注:我不能使用,因爲this問題的標準:如果問題通過複雜的關聯,跨越3個實體是急於負載

回答

0

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