class String
  def to_id
    BSON::ObjectId self
  end
end
class BSON::ObjectId
  def to_id
    self
  end
end

class String
  def to_id
    BSON::ObjectID self
  end
end
class BSON::ObjectID
  def to_id
    self
  end
end

Revert "Change ObjectID to ObjectId"
Revert "Change ObjectID to ObjectId"

This reverts commit efcc112397a8080fbfabd15dab30036bbb6c7140.
