How to define recursive Property in Castle ActiveRecord?

Suppose you have a class named MyClas开发者_如何学Cs. MyClass should have a property named Parent, Parent must be of type MyClass itself. It is necessary because MyClass wants to hold a tree structure.

How can it be done?

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It's pretty straightforward:

[ActiveRecord(Lazy = true)]
public class MyClass {
  [BelongsTo]
  public virtual MyClass Parent { get;set; }
}

You might also want to map the collection of children.

See these articles for more information on how to run recursive queries over this:

• http://ayende.com/Blog/archive/2006/11/22/ComplexQueriesWithActiveRecord.aspx
• http://web.archive.org/web/20090806071731/http://blogs.hibernatingrhinos.com/nhibernate/archive/2008/05/14/how-to-map-a-tree-in-nhibernate.aspx
• http://ayende.com/Blog/archive/2009/08/28/nhibernate-tips-amp-tricks-efficiently-selecting-a-tree.aspx