将对象推入mongoDB中的数组 [英] pushing an object to an array in mongoDB

问题描述

我正在尝试将对象发送到模型中的数组，但是每次执行此操作时，该数组仍然为空.

I'm trying to send an object to an array in my model, but every time I do, the array is still empty.

我将对象传递到后端，然后到达此处:

I pass the object to the backend and it arrives here:

var addFavoriteRecipe = function(req, res){
    if(req.user){
        console.log(req.body);
        userModel.User.find({_id: req.user._id}, {$push :{favoriteRecipes: {name: req.body.alias, _id: req.body._id}}}, function(err){
            if(err){
                res.send(err);
            }else{
                res.send("success!");
            }
        });
    }else{
        var sendBackError = {err: true, message: "You are not logged in."}
        res.send(sendBackError);
    }
}

req.body 上的控制台日志显示了我传递回的所有数据，并包含了我要推送到数组中的两个字段.

The console log on req.body shows all the data I passed back, and has the two fields I'm trying to push into the array.

这是我的模特:

var userSchema = mongoose.Schema({
  username: {
      type: String,
    required: true,
    unique: true
  },
  email: {
    type: String,
    required: true,
    unique: true
  },
  password: {
    type: String,
    required: true
  },
  friendsList: {
    type: Array,
  },
  favoriteRecipes: {
    type: Array,
  }
});

我一直在弄弄代码，但是我真的不知道该从哪里去.我想认为这是我模型中的东西，但我不确定.

I've toyed around with the code, but I really am lost as to where I should go from here. I want to think it's something on my model, but I'm not entirely sure.

推荐答案

您可以通过以下方式为对象数组定义模型:

You can define your model for an array of objects, either this way:

favoriteRecipes: [{
    _id: ObjectId,
    name: String
}]

或

favoriteRecipes: { type : Array , "default" : [] }

但是，问题似乎在这里:

but, The problem seems to be here:

 userModel.User.find(
   {_id: req.user._id}, 
   { $push : {favoriteRecipes: {name: req.body.alias, _id: req.body._id}}},
   function(err){
            if(err){
                res.send(err);
            }else{
                res.send("success!");
            }
 });

您正在使用 find ，需要将其更改为 update :

You are using find you need to change it to update:

 userModel.User.update(
     {_id: req.user._id}, 
     { $push : { favoriteRecipes: {name: req.body.alias, _id: req.body._id}}},
     function(err){
            if(err){
                res.send(err);
            }else{
                res.send("success!");
            }
 });

这篇关于将对象推入mongoDB中的数组的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！