用Fluent NHibernate查询属性 [英] Query-only properties with Fluent NHibernate

问题描述

我找不到如何在 Ayende的博客与Fluent NHibernate一起工作。

据我所知，我可以映射伪字段，哪个值是任何hql的结果查询。它是否正确？如何使用Fluent Nhibernate这个功能？我试过谷歌，但不成功。代码示例或链接到他们将不胜感激。

解决方案

根据这个票证它的作品：

http://code.google .com / p / fluent-nhibernate / issues / detail？id = 259

有一个示例，但是我没有测试过。 / p>

Ayende的例子的结果很可能就像下面这样。请注意，显然不能避免拥有表示集合的属性。

  public class BlogMap：ClassMap< Blog> 
 {
 public BlogMap（）
 {
 Id（p => p.Id）; 
 Map（p => p.Title 
 HasMany（p => p.Posts）.AsSet（）
 .Where（（PostedAt> =（getdate（） -  30 ）））
 .Access.NoOp（）; 
} 
} 
  

I can't find how Nhibernate feature described in Ayende's blog works with Fluent NHibernate.

As far as I understand, I can map pseudo-field which value is a result of any hql query. Is this correct? How this feature can be used with Fluent Nhibernate? I tried google, but unsuccessful. Code samples or links to them would be much appreciated.

解决方案

According to this ticket it works:

http://code.google.com/p/fluent-nhibernate/issues/detail?id=259

There is a sample there, but I haven't tested it.

The result with Ayende's example would probaly be something like below. Note that aparently it can't be avoided to have the property representing the collection.

    public class BlogMap : ClassMap<Blog>
    {
        public BlogMap()
        {
            Id(p => p.Id);
            Map(p => p.Title
            HasMany(p => p.Posts).AsSet()
                .Where("(PostedAt >= (getdate() - 30) )")
                .Access.NoOp();
        }
    }

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