class Comment
include Mongoid::Document

field :content

referenced_in :post
end

class Post
include Mongoid::Document

field :title

references_many :comments, :default_order => :_id.desc
end

<pre>
post = Post.create :title => 'new post'
post.comments.create :content => 'c1'
post.comments.create :content => 'c2'
</pre>

For 2.0.0.beta.19 the following code work as expected:

> post.comments.map(&:content) => ["c2", "c1"]

But for 2.0.0.rc.6 the :default_order is ignored:

> post.comments.map(&:content) => ["c1", "c2"]