ENV["RAILS_ENV"] ||= "development"
require "./config/environment"

class Comment
  include Mongoid::Document

  default_scope asc(:_id)
  scope :pre, where(:video_timestamp => nil)
  scope :timestamped, where(:video_timestamp.ne => nil)

end

p Comment.pre.selector # => {}
p Comment.unscoped.pre.selector # => {}
p Comment.where(:video_timestamp => nil).selector # => {"video_timestamp"=>nil}
p Comment.timestamped.selector # => {"video_timestamp"=>{"$ne"=>nil}}