nhibernate - nhibernate映射一个类别包含前n个产品

Question

我有一个问题，那就是“品类类”包含了很多产品类。但是现在，我有一个 CategoryService 类，它将在相同的情况下实现 find IList 每个类别只包含前 n 个产品，而不是所有产品，我该怎么办？给我一个选择，谢谢！

代码清单：

 public class category
 {
    public int Id{get;set;}
    public int Categoryname{get;set;}
    public IList<Product> Products{get;set;}
 }

public class Product
{
   public int Id{get;set;}
   public string ProductName{get;set;}
   public Category Category{get;set;}
   etc...
}

然后有一个域服务：

public class CategoryService
{
   private ICategoryRepository categoryRepository;

   public CategoryService(ICategoryRepository categoryRepository)
   {
     this.categoryRepository=categoryRepository;
   }

   public IList<Category> FindAll()
   {
     IList<Category> categories;
     categories=categoryRepository.FindAll();

     //and now i need categoryRepository find all category ,and every category contains top n product, what should i do;

   return categories;
   }
 }

Answer 1

var count = // it's your top
session.QueryOver<Category>
.Fetch(category => category.Product).Eager
.Take(count)
.TransformUsing(Transformers.DistinctRootEntity)
.List();