猫鼬删除具有ID的双嵌套对象

Question

我的猫鼬结构如下：

{
    "_id": "5ea1a61c68b82c3a844e0a36",
    "decks": [
        {
            "cards": [
                {
                    "_id": "5ea1a61c68b82c3a844e0a38",
                    "countryname": "France",
                    "language": "French"
                },
                {
                    "_id": "5ea1a61c68b82c3a844e0a39",
                    "countryname": "Mexico",
                    "language": "Spanish"
                }
            ],
            "_id": "5ea1a61c68b82c3a844e0a37",
            "name": "Countries"
        }
    ]
    "__v": 0
}

让我说我想删除法国卡，我该怎么做？香港专业教育学院看了很多例子，但我似乎无法弄清楚。 这是我现在的猫鼬查询：

Decks.update({'_id': req.body.globalid},{$pull: {'decks.cards': {'_id': req.params.cardid}}}, function(err) {

    })

提前谢谢

更新！：

我终于明白了，解决方法：

Decks.update({"_id": req.body.globalid, "decks._id": req.params.deckid},{$pull: {"decks.$.cards": {"_id": req.params.cardid}}}, function(err) {

    })