猫鼬更新MongoDB中的字段不起作用 [英] mongoose updating a field in a MongoDB not working

问题描述

我有此代码

var UserSchema = new Schema({
    Username: {type: String, index: true},
    Password: String,
    Email: String,
    Points: {type: Number, default: 0}
});

[...]

    var User = db.model('User');
   /*
    * Function to save the points in the user's account
    */
    function savePoints(name, points){
        if(name != "unregistered user"){
        User.find({Username: name}, function(err, users){

            var oldPoints = users[0].Points;
            var newPoints = oldPoints + points;

            User.update({name: name}, { $inc: {Points: newPoints}}, function(err){
                if(err){
                    console.log("some error happened when update");
                }
                else{
                    console.log("update successfull! with name = " + name);
                    User.find({Username: name}, function(err, users) { 
                        console.log("updated : " + users[0].Points);
                    });
                }
            });

        });
    }
}

savePoints("Masiar", 666);

我想通过以下方式更新我的用户(通过查找其名称): 更新他/她的观点.我确定oldPoints和points包含一个 值，但我的用户仍然保持零.控制台打印 更新成功".

I would like to update my user (by finding it with its name) by updating his/her points. I'm sure oldPoints and points contain a value, but still my user keep being at zero points. The console prints "update successful".

我做错了什么?很抱歉这个愚蠢的/noob问题.

What am I doing wrong? Sorry for the stupid / noob question.

Masiar

推荐答案

似乎您在做一些不规范的事情:

It seems you are doing a few unstandard things:

• 如果只想加载一个用户，请使用findOne代替find
• 应该调用Model.update来更新尚未加载的记录
• $inc正在添加oldPoints，因此新值将为2 * oldPoints + newPoints
• 您正在使用name作为条件查询，而不是Username

• Use findOne instead of find if you want to load just one user
• Calling Model.update should be done to update records that you have not loaded
• $inc is adding oldPoints, so the new value will be 2*oldPoints + newPoints
• You are using name as the conditional query instead of Username

我会将代码重写为如下形式:

I would rewrite the code into something like this:

User.findOne({Username: name}, function(err, user){
  if (err) { return next(err); }
  user.Points += points;
  user.save(function(err) {
    if (err) { return next(err); }
  });
});

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