NHibernate的如何將SQL查詢從多個表中獲取轉換爲QueryOver

Question

你好任何NHibernate的天才，

一些幫助/指導將真正意識到，我有點卡住了！

我有以下的SQL查詢，我想轉換爲QueryOver，我不知道天氣它可以完成？任何幫助將不勝感激。

SQL：

Insert Into #categoryAndItems 
Select GlobalRateCategoryId,null,[Description],null, null,null, GlobalRateCategoryId, 2 From [GlobalRateCategory] 

Insert Into #categoryAndItems 
Select Id,Name, gr.[Description],un.[Description],null,gr.Formula,gr.GlobalRateCategoryId, 1 From dbo.[GlobalRateCategoryVariable] gr JOIN 
dbo.UnitOfMeasure un on gr.UnitOfMeasureId = un.UnitOfMeasureId 
JOIN [GlobalRateCategory] grc on grc.GlobalRateCategoryId = gr.GlobalRateCategoryId 

Insert Into #categoryAndItems 
Select gr.GlobalResourceId,null, gr.[Description], um.[Description], gr.Rate,grr.Formula, c.id, 0 From #categoryAndItems c JOIN 
GlobalRateResource grr on c.id = grr.GlobalRateCategoryId JOIN 
GlobalResource gr on grr.GlobalResourceId = gr.GlobalResourceId JOIN 
UnitOfMeasure um on gr.UnitOfMeasureId = um.UnitOfMeasureId 

Select * From #categoryAndItems 
order by groupid,id 
drop table #categoryAndItems 

Answer 1

這不能被轉換爲QueryOver，但爲什麼不使用命名查詢和XML嵌入的資源，然後投射到一個DTO？

var results = Session 
    .GetNamedQuery("GetCategoriesAndItems") 
    .SetResultTransformer(
    new AliasToBeanResultTransformer(typeof(CategoryAndItemsDto))); 
return results.List<CategoryAndItemsDto>(); 

和你的DTO： -

public class CategoryAndItemsDto{ 
    public virtual int Id { get; set; } 
    public virtual string Description{ get; set; } 
... 
} 

這是嵌入式XML文件....

<?xml version="1.0" encoding="utf-8" ?> 
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2"> 
    <sql-query name="GetCategoriesAndItems"> 
    Insert Into #categoryAndItems 
    Select ... 

    Insert Into #categoryAndItems 
    Select ... 

    Insert Into #categoryAndItems 
    Select ... 

    Select * From #categoryAndItems 
    order by groupid,id 

    drop table #categoryAndItems 
    </sql-query> 
</hibernate-mapping> 

確保你選擇*匹配返回的所有列名完全DTO中的列（請記住它是區分大小寫的）

並且拼圖告訴你流利的最後一點一個XML文件： -

sessionFactory = Fluently.Configure() 
.Mappings(m => 
{ 
    ... 
    m.HbmMappings.AddFromAssemblyOf<SomeEntityMap>(); 
}) 
.BuildSessionFactory(); 

注：SomeEntityMap是在包含XML嵌入的資源組裝一類。