NHibernate的QueryOver多個訂單通過與別名

Question

這是我的情景：

public IEnumerable<ISuperMerc> getSuperMercTree(string IDLanguage) 
{ 

     SuperMercModel SMer = null; 
     SuperMercDescriptionModel descrSMer = null; 
     MercModel Merc = null; 
     MercDescriptionModel descrMerc = null; 

     var qOver = _HibSession.QueryOver<SuperMercModel>(() => SMer)      
       .JoinAlias(() => SMer.DescriptionsSM,() => descrSMer,JoinType.LeftOuterJoin) 
        .Where(() => descrSMer.IDLanguage == IDLanguage) 
       .JoinAlias(() => SMer.Merc,() => Merc,JoinType.LeftOuterJoin) 
        .JoinAlias(() => Merc.DescriptionsMer,() => descrMerc,JoinType.LeftOuterJoin) 
         .Where(() => descrMerc.IDLanguage == IDLanguage)  
       .OrderByAlias(() => SMer.ID).Asc 
       .ThenByAlias(() => descrMerc.Description).Asc 
       .Future<SuperMercModel>(); 

     return qOver; 

} 

我遇到了以下錯誤

無法解析屬性：說明：SuperMercModel

奇怪的是，Description字段位於MercDescriptionModel類中，不在SuperMercModel類中。

我正在使用別名來創建多聯接和多訂單查詢。

Answer 1

我使用HQL 下面的代碼

public IEnumerable<ISuperMerc> getSuperMercTree(string IDLanguage) 
{ 
    string hql = string.Empty; 

    hql = "select SM from SuperMercModel SM" 
       + " left join fetch SM.DescriptionsSM DSM" 
       + " left join fetch SM.Merc ME" 
       + " left join fetch ME.DescriptionsMer DME" 
       + " where DSM.IDLanguage = :IDLanguage " 
       + " and DME.IDLanguage = :IDLanguage " 
       + " order by SM.ID asc, DME.Description asc"; 

      IQuery query = _HibSession 
       .CreateQuery(hql) 
       .SetString("IDLanguage ", IDLanguage); 

      IList<SuperMercModel> result = query.List<SuperMercModel>(); 


      return result; 
} 

我希望這是對別人有幫助的解決了這個問題。

Answer 2

如果您將OrderByAlias和ThenByAlias更改爲常規OrderBy和ThenBy子句，則您的原始代碼應該不使用SQL。我有同樣的問題，併爲我解決它。