has_many association based on Views

Article = Meta.new do
  has_many :comments
end

BlogPost = Meta.new do
  has_many :comments
end

produces =>

View.define(:name => "has_many_comments") do |v|
  def v.map(uuid, doc)
    [ [ [doc['belongs_to'], doc['created_at']], doc ] ] if doc.is_a? Comment
  end
end

Comment.new(... :belongs_to => some_article )
some_article.comments # => list of all comments

This view is compatible with all the comment containers, defined at any time.