我收到以下错误:SystemStackError: stack level too deep在执行以下代码时,rails3 beta4下ruby 1.9.2-rc1:
ruby-1.9.2-rc1 > f = Forum.all.first
=> #<Forum id: 1, title: "Forum 1", description: "Description 1", content: "Content 1", parent_id: nil, user_id: 1, forum_type: "forum", created_at: "2010-07-17 04:39:41", updated_at: "2010-07-17 04:39:41", icon_file_name: nil, icon_content_type: nil, icon_file_size: nil, icon_updated_at: nil>
ruby-1.9.2-rc1 > f.children
=> [#<Forum id: 2, title: "Thread 2", description: "Description 2", content: "Content 2", parent_id: 1, user_id: 1, forum_type: "thread", created_at: "2010-07-17 04:40:17", updated_at: "2010-07-17 04:40:17", icon_file_name: …