如何定位下面所示的authors
数组中的子文档以进行更新?
collection.update({'_id': "4f44af6a024342300e000001"}, {$set: { 'authors.?' }} )
这个文档:
{
_id: "4f44af6a024342300e000001",
title: "A book",
created: "2012-02-22T14:12:51.305Z"
authors: [{"_id":"4f44af6a024342300e000002"}]
}