添加使用节点JS归档的MongoDB数据值

adding mongodb data value filed using node js

本文关键字：MongoDB 数据 节点 JS 添加      更新时间：2023-09-26

你好，我只需要使用节点js从MongoDB添加一个集合的两个字段值{type：Number}并将结果存储在MongoDB的同一集合中

第一个节点 js 查询从我的控制器内的 MongoDB 获取数据值。第二次尝试添加提取的值。3rd使用节点js将结果存储在MongoDB的同一集合中。

1）. 节点 js

var levelScoreQuiz = require('../models/levelscoreSchema.js');
try{

         var queryObj = {};
         var projection = '-id child.quiz_level.score_pre';
         var projection2 = '-id child.quiz_level.score_curr'; 

         var a = levelScoreQuiz.findOne(queryObj,projection);
         var b = levelScoreQuiz.findOne(queryObj,projection2);
         //console.log(a);
         //console.log(b);
         var add = a + b;
         //console.log(add);
         res.send(add);

        var userObj = {
        level_pre:req.params.add

        };
        var user = new levelScoreQuiz(userObj);
        user.save(function(err, result){
            if (err) {
                console.log('Error While Saving the reuslt ' +err)}
        else{
            //console.log("User score saved successfully");
            console.log("User Previous score saved successfully");
            res.json(result);
        }
      });
    }catch(err){
        console.log('Error While Saving the reuslt ' +err);
        return next(err);
    }

2）. MongoDB模式

var userScore = new Schema({
child: {
    quiz_level:{
        current_level:{type:Number},
            score_pre:{type:Number},
            score_curr:{type:Number}
    }
  }
});

结果：它在我的浏览器中显示对象

 "[object Object][object Object]"

    var levelScoreQuiz = require('../models/levelscoreSchema.js');
try{

         var queryObj = {};
         var projection = {id: 0, 'child.quiz_level.score_pre': 1};
         var projection2 = {id: 0, 'child.quiz_level.score_curr': 1}; 

         var a = levelScoreQuiz.findOne(queryObj,projection);
         var b = levelScoreQuiz.findOne(queryObj,projection2);
         //console.log(a);
         //console.log(b);
         var add = a.child.quiz_level.score_pre + 
                   b.child.quiz_level.score_curr;
         //console.log(add);
         res.send(add);

        var userObj = {
        child: {quiz_level: { score_pre: req.params.add}}

        };
        var user = new levelScoreQuiz(userObj);
        user.save(function(err, result){
            if (err) {
                console.log('Error While Saving the reuslt ' +err)}
        else{
            //console.log("User score saved successfully");
            console.log("User Previous score saved successfully");
            res.json(result);
        }
      });
    }catch(err){
        console.log('Error While Saving the reuslt ' +err);
        return next(err);
    }
相关文章：