我有几个问题，你在那里Rails 3大师。你怎么能完成以下任务？
以下伪代码目前无效。谢谢大家。
@items = (@itemsA + @itemsB).order("name ASC")
@item = Item.where("type = ?" and "condition = ?", "book", "new")
@commenteditems = Item.find_all_by_type_and_condition("book", "new").include("notes").select("item[name]", "notes[note]")
@selecteditems = @items.where("select = ?", true)