错误：需要数据和salt参数

Question

我正在尝试使用post请求将用户保存到mongodb数据库，如下所示，但我收到错误bcrypt错误：需要数据和哈希参数。这是一个非常简单的代码设置但我无法弄清楚任何东西错了。 车型/ users.js

const mongoose = require('mongoose');
const bcrypt = require('bcrypt');
const confic = require('../models/users');

// User schema
const UserSchema = mongoose.Schema({
	name: {
		type: String,
	},
	email: {
		type: String,
		required: true
	},
	username:{
		type: String,
		required: true
	},
	password: {
		type: String,
		required: true
	}
});

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

module.exports.getUserById = function(id,callback){
	User.findById(id,callback);
}

module.exports.getUserByUsername = function(username,callback){
	const query = {username:username}
	User.findOne(query,callback);
}

module.exports.addUser= function (newUser, callback) {
   bcrypt.genSalt(10,(err,salt) => {
   	bcrypt.hash(newUser.password, salt , (err, hash) =>{
        if(err) throw (err);

        newUser.password=hash;
        newUser.save(callback);
   	});
   });
}

路由/ users.js

const jwt = require('jsonwebtoken');
User = require('../models/users')

// // Register
router.post('/register', (req, res, next) => {
  var newUser = new User({
    name: req.body.name,
    email: req.body.email,
    username: req.body.username,
    password: req.body.password
  });

  User.addUser(newUser, (err, User) => {
    if(err){
      // res.json({success: false, msg:'Failed to register user'});
    } else {
      // res.json({success: true, msg:'User registered'});
    }

  });

});

// Authenticate
router.post('/authenticate', (req, res, next) => {
  res.send('AUTHENTICATE');
});

// Profile
router.get('/profile', (req, res, next) => {
  res.send('PROFILE');
});

module.exports = router;

服务器正在运行但在使用postman chrome post请求错误后显示，服务器停止工作，因为图像中显示错误。

Answer 1

The error comes from the bcrypt.hash method. In your case, you have the following piece of code :

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

I think that your problem comes from the newUser.password that must be empty (null or undefined). The error says data and salt arguments required. It looks like your salt is correctly generated and you didn't check if newUser.password === undefined, so here's my bet : somehow newUser.password is undefined.

Also, you can check if the genSalt method works fine by adding if(err) throw (err); after calling it as you did for the bcrypt.hash method.

Hope it helps,
Best regards

Answer 2

删除bcrypt.hash（）中的箭头=>。使用老式的方法定义function() {}

Answer 3

每只猫鼬文档：https://mongoosejs.com/docs/faq.html

问：我在虚拟，中间件，getter / setter或方法中使用了箭头功能，而此值是错误的。

A。箭头函数处理此关键字的方式与常规函数大不相同。猫鼬吸气器/设置器依赖于此，以使您能够访问要写入的文档，但是此功能不适用于箭头功能。除非不想访问吸气剂/设置器中的文档，否则不要将箭头功能用于猫鼬吸气剂/设置器。

Answer 4

确保属性与提供的一样，在我的例子中，我发送了一个带有大写 Password 的 P 属性，然后用一个小 {{ 1}} 给 password 函数的信。