Mongoid: Moving embedded records (recursively_embeds_many) to top-level. Not actually happy about it, as I don't have the experience with Mongoid to decide whether setting the state like this is risky. But it seems Mongoid 3.1.4 doesn't offer a more elegant way to do this. Feedback very welcome.

move_embedded_to_toplevel.rb

class Group
  include Mongoid::Document

  recursively_embeds_many
end

# remove from old parent
@group.parent_group.child_groups.delete @group

# set new state
@group.destroyed = false
@group.new_record = true
@group._parent = nil
@group.embedded = false


@group.save