Question

我是node.js的新手，正在构建用户登录系统，但出现错误如注册新用户时遇到此错误

MongoDB已连接

(node:12592) UnhandledPromiseRejectionWarning: TypeError: user is not a constructor
    at User.findOne.then.user (C:\Users\AKASH TOMAR\Desktop\miniproject\routes\users.js:59:35)
    at process._tickCallback (internal/process/next_tick.js:68:7)
(node:12592) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:12592) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
(node:12592) UnhandledPromiseRejectionWarning: TypeError: user is not a constructor
    at User.findOne.then.user (C:\Users\AKASH TOMAR\Desktop\miniproject\routes\users.js:59:35)
    at process._tickCallback (internal/process/next_tick.js:68:7)
(node:12592) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 2)

我没有走错地方，请帮帮我，因为明天我必须在大学里证明自己，我也对我的代码进行了注释，以确保他们站得住脚。

const express = require('express');

const router = express.Router();
const bcrypt = require('bcryptjs');
//User model
const User = require('../models/User');


//Login page
router.get('/login',(req,res)=>res.render('login'));

//register page
router.get('/register',(req,res)=>res.render('register'));

//Register Hnadle
router.post('/register',(req,res)=>{
    const {name,email,password,password2 } = req.body;
    let errors = [];

    //check required fields
    if(!name || !email || !password || !password2){
        errors.push({msg: 'Please fill in all fields'});
    }

    //check passwords match
    if(password !== password2){
        errors.push({msg: 'Passwords do not match'});
    }
    //check password length
    if(password.length < 6){
        errors.push({msg:'Password should be at least 6 chracters'});

    }
    if(errors.length>0){
        res.render('register',{
            errors,
            name,
            email,
            password,
            password2

        });
    }else{
        //validation passed
        User.findOne({email: email})
          .then(user => {
              if(user){
                  //user exists
                  errors.push({msg: 'Email is already registered'});
                  res.render('register',{
                    errors,
                    name,
                    email,
                    password,
                    password2

                });
              }else {
                  const newUser = new user({
                      name,
                      email,
                      password
                  }); 
                  //hash password


        bcrypt.genSalt(10, (err, salt) => {

          bcrypt.hash(newUser.password, salt, (err, hash) => {

            if (err) throw err;

            newUser.password = hash;

            newUser

              .save()

              .then(user => {

                req.flash(

                  'success_msg',

                  'You are now registered and can log in'

                );

                res.redirect('/users/login');

              })

              .catch(err => console.log(err));

          });

        });

      }

    });

  }

});
module.exports = router;

Answer 1

您的代码说

   const newUser = new user({

，但是在这种情况下，user是您的承诺then中的变量。您想要User这是您的mongo类。

节点js中的登录系统

1 个答案: