findOneAndUpdate不是函数 [英] findOneAndUpdate is not a function

问题描述

我整个上午都在使用Google搜索，并尝试了各种修复程序，但我无法弄清楚.

I've spent all morning googling this, and trying various fixes but I cannot figure it out.

当我尝试运行此错误时，我不断收到错误"TypeError:req.user.findOneAndUpdate不是函数":

I keep getting the error "TypeError: req.user.findOneAndUpdate is not a function" when I try to run this:

req.user.findOneAndUpdate({_id: req.user._id}, { $addToSet: { flashcards : { $each: cards }}}, {upsert : true}, function(err, doc) {
        if(err) return console.log(err);
        res.send(doc);
    });

我尝试将req.user明确转换为User模型(例如var NewUser = new User(req.body)，尝试简化查询等，但似乎无济于事.

I've tried explicitly turning req.user into a User model (eg var NewUser = new User(req.body), tried simplifying the query etc but nothing seems to work.

带有模型声明

const User = require('../models/user');

var NewUser = new User(req.user);

    NewUser.findOneAndUpdate({_id: req.user._id}, { $addToSet: { flashcards : { $each: cards }}}, {upsert : true}, function(err, doc) {
        if(err) { return console.log(err); }
        else { return res.send(doc);}
    });

用户模型架构

const mongoose = require('mongoose'),
    Schema = mongoose.Schema,
    FlashcardSchema = require('./flashcardSchema'),
    bcrypt = require('bcrypt-nodejs');

var UserSchema = new Schema({
    username: {
        type: String,
        required: false
      },
      email: {
        type: String,
        required: true,
        unique: true
      },
      password: {
        type: String
      },
      created_on: {
        type: Date,
        default: Date.now
      },
        points: Number,
        flashcards: [FlashcardSchema],
        courses: [{type: Schema.Types.ObjectId, ref: 'Course'}]
});

UserSchema.methods.generateHash = function(password) {
    return bcrypt.hashSync(password, bcrypt.genSaltSync(8), null);
};

UserSchema.methods.validPassword = function(password) {
    return bcrypt.compareSync(password, this.password);
};

module.exports = UserSchema;

和模型

const mongoose = require('mongoose'),
    Schema = mongoose.Schema,
    UserSchema = require('../schemas/userSchema');

module.exports = mongoose.model('User', UserSchema);

推荐答案

解决方案是在模型上运行功能，而不是在模型实例上运行功能.因此，代替:

The solution is to run functions on a model, not on a instance of it. So instead of:

var NewUser = new User(req.user);
NewUser.findOneAndUpdate...

做:

User.findOneAndUpdate...

这篇关于findOneAndUpdate不是函数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！