在nhibernate会话中获取集合

一个属性有很多照片。一张照片属于一个属性。

在我的mvc控制器，我得到作为参数数组的整数。这些整数表示我要删除的照片的id。

我正在使用nhibernate会话和事务与数据库交互。

public ActionResult DeleteImgs(int[] data)
{
   Property p = null;
   using (ISession session = ....)
   {
      using(ITransaction transaction session.BeginTransaction())
      {            
         Photo photo = session.Get<Photo>(data[0]);
         p = session.Get<Property>(photo.Id);
         // found images and delete them
         foreach(int id in data)
         {
            Photo ph = session.Get<Photo>(id);
            //remove property from association so I can delete photo
            ph.Property = null;
            session.Delete(ph);
            session.SaveOrUpdate(ph);
         }
         //load property now with collection of remaining photos
         // here IS THE PROBLEM, Even there is photos inside collection
         // in debug I'm getting empty collection
         p = session.Query<Property>().
             .Fetch(x=>x.Photos).ToList() //empty?
             .FirstOrDefault;
         transaction.Commit();
      }
   }
   return View();

}

IEnumerable<Photo>photos = session.Query<Photo>().Where(x => x.Property == p).ToList();