MONGODB：更新子文档中的嵌套数组

Question

我可以使用$ addToSet更新文档中的数组，但我想更新文档数组中的数组。

我的架构：

const mySchema1 = new Schema({
    myId : {type:String, unique:true},
    name : String,
    entries : [{
        value : String,
        keywords:[String]
    }]
});

routes.js

app.put('/api/entity',function(req,res){
    let model = new Entity();
    console.log(req.body);
    model.collection.update({"myId":req.body.myId,"entries":req.body.entries},{$addToSet:{"entries":{$each:[req.body.entries]}}},function(err,entries){
        if(err){
            res.send(err);
        }else{
            res.send(entries);
        }
    })
});

现在我想更新（如果存在）/插入（如果不存在）， 1.价值 2.特定值的关键字

提前致谢!!!

Answer 1

var entries = req.body.entries;
// match ALL of the documents whose `entires` attribute contains ALL `req.body.entries`
var query = {"myId":req.body.myId, "entries": {$all: entries}};

// match SOME of the documents whose `entires` attribute contains SOME `req.body.entries`
// var query = {"myId":req.body.myId, "entries": {$some: entries}};

// ADD all `req.body.entries` to the matched documents
var update = {$addToSet:{"entries":{$each:[entries]}};

// Create a new matching document if one doesn't already exeist
var options = {upsert = 1};


app.put('/api/entity',function(req,res){
    let model = new Entity();

    console.log(req.body);

    model.collection.update(
      query,
      update,
      options
    },function(err,entries){
        if(err){
            res.send(err);
        }else{
            res.send(entries);
        }
    })
});

顺便说一句，您可以使用更简单的语法查询Entity db。 Entity.update()