bson_ruby: Temporary patch for generating object_id in ascending order.

bson_ruby_oid_fix.rb

require 'bson'

# Undefine 'next' method which is define by c ext. 
BSON::ObjectId::Generator.send :undef_method, :next

# Redefine next method. 
module BSON
  class ObjectId
    class Generator
      def next(time = nil)
        @mutex.lock
        begin
          count = @counter = (@counter + 1) % 0xFFFFFF
        ensure
          @mutex.unlock rescue nil
        end
        generate(time || ::Time.new.to_i, count)
      end
    end
  end
end