I am busy creating a project which allows the user to enter "Email" & "Password" to register to the site,

我正忙着创建一个项目，允许用户输入“电子邮件”和“密码”注册到网站，

When I try to enter a user using the "Email" & "Password" to enter this site, I get the following error:

当我尝试使用“Email”和“Password”输入用户以进入此站点时，我收到以下错误：

MongooseError: Operation users.insertOne() buffering timed out after
10000ms

Unhandled rejection MongooseError: Operation users.findOne() buffering
timed out after 10000ms

I have tried all the proposed solutions I found here which have a similar problem, delete the node_modules folder and reinstall mongoose.

我已经尝试了我在这里找到的所有建议的解决方案，它们都有类似的问题，删除NODE_MODULES文件夹并重新安装Mongoose。

Please see my code below, thanks!

请看我下面的代码，谢谢！

const express = require("express");
const bodyParser = require("body-parser");
const ejs = require("ejs");
const mongoose = require("mongoose");

const app = express();

app.use(express.static("public"));
app.set('view engine', 'ejs');

app.use( bodyParser.urlencoded ({extended: true}));

mongoose.connect = ("mongodb://localhost:27017/userDB", {useNewUrlParser: true, useUnifiedTopology: true});

const userSchema = {
  email: String,
  password: String
};

const User = new mongoose.model("User", userSchema);

app.get("/", function(req, res){
res.render("home")
});

app.get("/login", function(req, res){
res.render("login")
});

app.get("/register", function(req, res){
res.render("register")
});

app.post("/register", function(req, res){
const newUser = new User({
  email: req.body.username,
  password: req.body.password
  });
  newUser.save(function(err){
    if (err) {
      console.log(err);
    } else {
      res.render("secrets");
   }
 });
});

Can anyone help me out?

有谁能帮帮我吗？

Atom images - Project SecretsCode

Atom图像-项目秘书代码

try adding one more line under mongoose.connect curly braces:-

尝试在mongoos下再添加一行。连接花括号：-

mongoose.connect("monogodb://localhost....,{useNewUrlParser:true,
    useUnifiedTopology:true,
    useCreateIndex:true}).then(()=>{
console.log(`successfully connected`);
}).catch((e)=>{
console.log(`not connected`);
})

you can check the error in console if not connected by replacing "not connected" with 'e'

如果未连接，您可以通过将“未连接”替换为“e”来检查控制台中的错误

I was having the same issue, Make sure that your mongoDB database username and password is alphanumeric with no special symbols. And dont add this:

我也遇到了同样的问题，请确保您的MongoDB数据库用户名和密码是由字母数字组成的，没有特殊符号。并且不要添加以下内容：

{useNewUrlParser:true,
    useUnifiedTopology:true,
    useCreateIndex:true}) 

simply write this:

简单地写一下：

mongoose.connect(process.env.MONGO_URL,).then(()=>{
    console.log(`successfully connected`);
    }).catch((e)=>{
    console.log(`not connected`);
    }); 

This worked for me.

这对我很管用。

const mongoose = require('mongoose');

mongoose.set('strictQuery', false);

mongoose.connect('mongodb://127.0.0.1:27017/student-reg').then(() => {
  console.log(`successfully connected`);
}).catch((e) => {
  console.log(`not connected`);
}); 

According to Mongoose documentation, if the connection fails on your machine, try replacing localhost with 127.0.0.1 in this line of code:

根据Mongoose文档，如果您的计算机上的连接失败，请尝试在以下代码行中将本地主机替换为127.0.0.1：

mongoose.connect('mongodb://localhost:27017/dbname', { useNewUrlParser: true, useUnifiedTopology: true });

For a reason my IP address changed, so I had to update it inside Mongo DB - NetworkAccess - Edit - Use the new IP address, maybe you'll see a button to update with current Ip or something like that, click it

由于某种原因，我的IP地址改变了，所以我不得不在Mongo DB-NetworkAccess-编辑-使用新的IP地址中更新它，也许你会看到一个按钮，用当前的IP或类似的东西更新，点击它

try this one :

试试这个：

    const userSchema = new mongoose.Schema({
          email: String,
          password: String
    });
    
    mongoose.model("User", userSchema);
    
    const User = mongoose.model("User");

///////

app.post("/register", function(req, res){
const newUser = new User({
  email: req.body.username,
  password: req.body.password
  });
  newUser.save(function(err){
    if (err) {
      console.log(err);
    } else {
      res.render("secrets");
   }
 });
});