nhibernate - 反转NHibernate查询的逻辑

Question

我构建了以下查询，使用NHibernate它将给我一个MenuView包含给定页面（由页面 id 引用）的项目集合。

// Only retrieve the required properties from Menu object
ProjectionList menuViewProjections = Projections.ProjectionList()
    .Add(Projections.Property("ID"), "ID")
    .Add(Projections.Property("Name"), "Name")
    .Add(Projections.Property("Description"), "Description");

var menus = session.CreateCriteria(typeof(Menu))
    // Only menu's that are editable
    .Add(Restrictions.Eq("IsEditable", true))

    // Only project required properties
    .SetProjection(menuViewProjections)

    // Only menu's that contain this page (Menu object has IList<Page> property called 'Pages')
    .CreateCriteria("Pages")
    // Restrict to menu's containing the pages with an id of the specified value
    .Add(Restrictions.Eq("ID", pageId))

    // Transform results into required, light-weight, view objects
    .SetResultTransformer(Transformers.AliasToBean(typeof(MenuView)))
    .List<MenuView>();

这很好用；但是，现在我想做相反的事情：我想查询所有不包含具有指定 ID 的页面的可编辑菜单对象。到目前为止，我还没有找到解决方案。我原以为对上述查询的 pages 部分进行简单的反转就足以导致：

// Only retrieve the required properties from Menu object
ProjectionList menuViewProjections = Projections.ProjectionList()
    .Add(Projections.Property("ID"), "ID")
    .Add(Projections.Property("Name"), "Name")
    .Add(Projections.Property("Description"), "Description");

var menus = session.CreateCriteria(typeof(Menu))
    // Only menu's that are editable
    .Add(Restrictions.Eq("IsEditable", true))

    // Only project required properties
    .SetProjection(menuViewProjections)

    // Only retrieve menus that do NOT contain this referenced page
    .CreateCriteria("Pages")
    .Add(Restrictions.Not(Restrictions.Eq("ID", pageId)))

    // Transform results into required view objects
    .SetResultTransformer(Transformers.AliasToBean(typeof(MenuView)))
    .List<MenuView>();

但是，这会导致以下 SQL：

SELECT this_.ID          as y0_,
   this_.Name        as y1_,
   this_.Description as y2_
FROM   [Menu] this_
       inner join PagesInMenu pages3_
         on this_.ID = pages3_.MenuID
       inner join [Page] page1_
         on pages3_.PageID = page1_.ID
WHERE  this_.IsEditable = 1 /* @p0 */
       and not (page1_.ID = 8 /* @p1 */)

仍然返回包含 id 为 8 的页面的菜单项的结果。为什么这种简单的逻辑反转在代码方面不那么简单？

[更新] 接受 Firo 的建议，将建议的查询更改为；

// Only retrieve menus that do NOT contain this referenced page
.CreateCriteria("Pages")
.Add(Subqueries.PropertyNotIn("Id", querymenuItemswithPage))   <--- query you have would be here

现在生成如下sql语句；

    SELECT this_.ID          as y0_,
       this_.Name        as y1_,
       this_.Description as y2_
FROM   [Menu] this_
       inner join PagesInMenu pages3_
         on this_.ID = pages3_.MenuID
       inner join [Page] page1_
         on pages3_.PageID = page1_.ID
WHERE  this_.IsEditable = 1 /* @p0 */
       and page1_.ID not in (SELECT this_0_.ID as y0_
                             FROM   [Page] this_0_
                             WHERE  this_0_.ID = 1 /* @p1 */

)

乍一看，这似乎正是我想要的，但遗憾的是（可能是由于我对连接的理解不深）仍然没有完全返回我想要的。鉴于下表

菜单

然后是PagesInMenu的连接表（带有 WHERE PageID = 1 的 WHERE 子句）

我们可以看到菜单 5 和 6 中没有引用 id 为 1 的页面。我希望有问题的查询只返回一行，这将是 ID 为 5 的菜单的 ID、名称和描述，因为这是仅包含第 1 页且可编辑的菜单

相反，新查询返回；

我已经划掉了所有返回但不应该的行。这里发生了什么 ！？

Answer 1

更新：

• 移除.CreateCriteria("Pages")

• 添加子查询

  var querymenuItemswithPage = DetachedCriteria.For<Menu>()
  .CreateCriteria("Pages")
      .Add(Restrictions.Eq("ID", pageId))
  .SetProjection(Projections.Id())
  
  // Only retrieve the required properties from Menu object
  ProjectionList menuViewProjections = Projections.ProjectionList()
      .Add(Projections.Property("ID"), "ID")
      .Add(Projections.Property("Name"), "Name")
      .Add(Projections.Property("Description"), "Description");
  
  var menus = session.CreateCriteria(typeof(Menu))
      // Only menu's that are editable
      .Add(Restrictions.Eq("IsEditable", true))
  
      // Only project required properties
      .SetProjection(menuViewProjections)
  
      // Only retrieve menus that do NOT contain this referenced page
      .Add(Subqueries.PropertyNotIn("Id", querymenuItemswithPage))
  
      // Transform results into required view objects
      .SetResultTransformer(Transformers.AliasToBean(typeof(MenuView)))
      .List<MenuView>();