Question

我正在尝试更新我的MongoDB数据库上的阵列，但这显示了这一点。我试图按照官方文档中给出的每个步骤进行操作，但是它不起作用。请帮助

尝试了官方文档，没有用。

const express = require('express');
const router = express.Router();
const mongoose = require('mongoose');
const { ensureAuthenticated, forwardAuthenticated } = require('../config/auth');

// Welcome Page
router.get('/', forwardAuthenticated, (req, res) => res.render('welcome'));

//DB Config
const db = require('../config/keys').MongoURI;

// Dashboard
router.get('/dashboard', ensureAuthenticated, (req, res) => {
    mongoose
        .connect(db, {useNewUrlParser: true})
        .then(() => console.log('MongoDB Connected'))
        .catch(err => console.log(err));
    res.render('dashboard', {
        user: req.user
    })
});

router.post('/dashboard', ensureAuthenticated, (req, res) => {
    req.flash('success_msg', 'Book added, Reload to view the changes');
    res.redirect('dashboard')
});

// Add
router.post('/add', ensureAuthenticated, (req, res) => {
    const { name } = req.body;
    console.log(name);
    const newBooks = req.user.books;
    newBooks.push(name);
    console.log(newBooks);
    db.users.updateOne(
        {"email" : req.user.email},
        {$set: { "name" : "hello"}});
    res.render('dashboard', {
        user: req.user
    });
});



module.exports = router;

Answer 1

尝试一下！

const User = require('../models/users') //important (look for the user model)
const express = require('express');
const router = express.Router();
const mongoose = require('mongoose');
const { ensureAuthenticated, forwardAuthenticated } = require('../config/auth');

// OUTSIDE !!!!!!!!!!!!
mongoose
.connect(db, {useNewUrlParser: true})
.then(() => console.log('MongoDB Connected'))
.catch(err => console.log(err));

//DB Config
const db = require('../config/keys').MongoURI;

router.get('/dashboard', ensureAuthenticated, (req, res) => {

    res.render('dashboard', {
        user: req.user
    })
});

outer.post('/dashboard', ensureAuthenticated, (req, res) => {
    req.flash('success_msg', 'Book added, Reload to view the changes');
    res.redirect('dashboard')
});

// Add
router.post('/add', ensureAuthenticated, (req, res) => {
    const { name } = req.body;
    console.log(name);
    const newBooks = req.user.books;
    newBooks.push(name);
    console.log(newBooks);
    var email = req.user.email;
    User.findOneAndUpdate(
        {"email" : email},
        {$set: { "name" : "hello"}});
    res.render('dashboard', {
        user: req.user
    });
});



module.exports = router;

Answer 2

您正试图调用猫鼬模型方法，但实际上，您是在数据库URI字符串上调用它。

相反，您需要执行以下操作：

const User = mongoose.model('User');

User.updateOne({"email" : req.user.email},
        {$set: { "name" : "hello"}});

以上假设您的用户架构已定义为“用户”。

TypeError：无法读取未定义的属性“ updateOne”

2 个答案: