Mongoose.findOneAndUpdate() 没有创建新文档答案

【问题标题】：Mongoose.findOneAndUpdate() is not creating new documentMongoose.findOneAndUpdate() 没有创建新文档
【发布时间】：2017-05-06 14:56:55
【问题描述】：

当客户端提供新的 WEEKNUM 时，mongoose.findOneAndUpdate() 方法不会创建新对象。相反，它只是更新集合中已经存在的 WEEKNUM 和 WEEKDATA。我该如何解决？我在这里错过了什么？

架构：

{
    ageGroup:String,
    monthData: [{
    month:String,
    circleTimeWordsList:[String],
    circleTimeTips:[String],

    weekData : [{
        weekNum : String,
        theme   : String,

        dayData: [{
            day:String,
            circleTimeSong: String,
            circleTimeBook: String,
            circleTimeActivity: String,

            learningCenter: [{
                learningCenterName:String,
                learningCenterActivity:String 
            }]
        }]
    }]
}]
}

这是我的架构。我正在使用 mongoose.findOneAndUpdate() 插入/更新集合中的数据。

例如。

如果我们在集合中没有任何内容。数据将被插入。

如果我们的集合中已经有以下数据。

{
    ageGroup:"2",
    monthData: {
    month:"January",
    circleTimeWordsList:["word 1", "word 2"],
    circleTimeTips:["teaching tips", "teaching tips 2"],

    weekData : {
        weekNum : "1",
        theme   : "circleTime theme weekly 1",

        dayData: [{
            day:"Monday",
            circleTimeSong: "circleTimeSong 1", 
            circleTimeBook: "english 1", 
            circleTimeActivity: "circleTimeActivity 1", 

            learningCenter: [{
                learningCenterName:"Art Center",
                learningCenterActivity:"learningCenterActivity 1" 
            },
            {
                learningCenterName:"Language Center",
                learningCenterActivity:"learningCenterActivity 1"
            }]
        }]
    }
}

}

如果客户端将以下 JSON 发送到服务器，

{
        ageGroup:"2",
        monthData: {
        month:"January",
        circleTimeWordsList:["word 1", "word 2"],
        circleTimeTips:["teaching tips", "teaching tips 2"],

        weekData : {
            weekNum : "2",
            theme   : "circleTime theme weekly 2",

            dayData: [{
                day:"Monday",
                circleTimeSong: "circleTimeSong 2", 
                circleTimeBook: "english 2", 
                circleTimeActivity: "circleTimeActivity 2", 

                learningCenter: [{
                    learningCenterName:"Art Center",
                    learningCenterActivity:"learningCenterActivity 2" 
                },
                {
                    learningCenterName:"Language Center",
                    learningCenterActivity:"learningCenterActivity 2"
                }]
            }]
        }
    }
}

mongodb 集合将如下所示：

{
        ageGroup:"2",
        monthData: {
        month:"January",
        circleTimeWordsList:["word 1", "word 2"],
        circleTimeTips:["teaching tips", "teaching tips 2"],

        weekData : [
                {
                    weekNum : "1",
                    theme   : "circleTime theme weekly 1",

                    dayData: [{
                        day:"Monday",
                        circleTimeSong: "circleTimeSong 1", 
                        circleTimeBook: "english 1", 
                        circleTimeActivity: "circleTimeActivity 1", 

                        learningCenter: [{
                            learningCenterName:"Art Center",
                            learningCenterActivity:"learningCenterActivity 1" 
                        },
                        {
                            learningCenterName:"Language Center",
                            learningCenterActivity:"learningCenterActivity 1"
                    }]
                },

                {
                    weekNum : "2",
                    theme   : "circleTime theme weekly 2",

                    dayData: [{
                        day:"Monday",
                        circleTimeSong: "circleTimeSong 2", 
                        circleTimeBook: "english 2", 
                        circleTimeActivity: "circleTimeActivity 2", 

                        learningCenter: [{
                            learningCenterName:"Art Center",
                            learningCenterActivity:"learningCenterActivity 2" 
                        },
                        {
                            learningCenterName:"Language Center",
                            learningCenterActivity:"learningCenterActivity 2"
                        }]
                    }]
                }
            ]
        }
    }
}

但是当前代码只是更新旧数据，而不是在 WEEKDATA 数组中为第 2 周创建单独的对象

这是我正在使用的代码：

MyData.getMyDataModelObject().findOneAndUpdate({ageGroup:data.ageGroup, month:data.monthData.month/*, weekNum:data.monthData.weekData.weekNum*/}, data, {upsert:true}, function(err, foundData){});

【问题讨论】：

findOneAndUpdate 更新整个文档。您显然想要的是添加或更新一个 sub 文档。在这里阅读：mongoosejs.com/docs/subdocs.html。如果您需要经常执行此类更新，可能值得重新设计您的架构。

标签： javascript node.js mongodb mean-stack

【解决方案1】：

假设请求进入正文

var data=req.body;
delete data.weekData;
findOneAndUpdate(query,data,function(err,model){
  if(err){
// handle here
    }
 model.monthData.weekData.push(req.body.weekData);
 model.save();
});

或

var data=req.body;
    findOneAndUpdate(query,{$push:{"weekData":data.weekData},function(err,model){
      if(err){
    // handle here
        }      
    });
     delete data.weekData;
     findOneAndUpdate(query,data,function(err,model){

      });

或

在此使用 mongoose 中的子文档，您必须更改您的架构，但如果您执行 CRUD 操作，这是更好的选择
链接subdocuments

【讨论】：