Question

我有一个猫鼬用户文档。每个用户都有数组或单词，例如名词我希望能够更新单词的字段，例如向频率添加+1或更改状态编号。我可以访问整个数组，但不能访问数组中的单个项目。我也希望能够根据其字段显示数组中的项目，例如仅显示频率为3或更高的那些...

我尝试了很多不同的方法，但我只是不明白。当我尝试访问和更新文档时，我不断收到错误消息，指出findOneAndUpdate不是函数，或者是“未定义”。

{
    "_id" : ObjectId("5f7d8490c1842471c6bcea42"),
    "username" : "eric@mail.com",
    "nouns" : [ 
        {
            "_id" : ObjectId("5f7d849cc1842471c6bcea43"),
            "word" : "die Sonne",
            "timeStamp" : ISODate("2020-10-07T09:04:28.436Z"),
            "frequency" : 0,
            "status" : 0
        }, 
        {
            "_id" : ObjectId("5f7d84a8c1842471c6bcea45"),
            "word" : "das Wetter",
            "timeStamp" : ISODate("2020-10-07T09:04:40.940Z"),
            "frequency" : 0,
            "status" : 0
        }, 
        {
            "_id" : ObjectId("5f7d84afc1842471c6bcea47"),
            "word" : "der Apfel",
            "timeStamp" : ISODate("2020-10-07T09:04:47.403Z"),
            "frequency" : 0,
            "status" : 0
        }, 
        {
            "_id" : ObjectId("5f7d84b9c1842471c6bcea49"),
            "word" : "das Maedchen",
            "timeStamp" : ISODate("2020-10-07T09:04:57.388Z"),
            "frequency" : 0,
            "status" : 0
        }, 
        {
            "_id" : ObjectId("5f7d84c8c1842471c6bcea4b"),
            "word" : "das Auto",
            "timeStamp" : ISODate("2020-10-07T09:05:12.036Z"),
            "frequency" : 0,
            "status" : 0
        }
    ],
    "verbs" : [],
    "adjectives" : [],
    "others" : [],
    "salt" : "*****",
    "hash" : "*****",
    "__v" : 5
}

Answer 1

几个小时后将其弄清楚

const ObjectId = require('mongodb').objectID


db.collections.users.updateOne(
  {},
  {$set: {"nouns.$[element].status": 3}},
  {multi: true,
  arrayFilters: [{"element._id": 
ObjectId(req.body.inputId)}]}
);

如何访问和更新嵌套的Mongoose文档

1 个答案: