猫鼬模式上的未定义字段

Question

我在尝试比较用户密码时遇到未定义的字段

这是函数

logUser = (req,res) => {
       User.findOne({ username:req.body.username}, (err,user) => {
            if(!user){
                req.flash('error','El nombre de usuario no existe');
                res.redirect('/login');
            }else if(!user.comparePassword(req.body.password)){
                req.flash('error','La contraseña no es correcta');
                res.redirect('/login');
            }else{
                res.redirect('/');
            }
       });
    }

当执行转到 else if 并使用 comparePassword 函数时，架构字段为 undefined

架构文件

const mongoose = require('mongoose');
const Schema = mongoose.Schema;
const bcrypt = require('bcrypt');

const userSchema = Schema({
    username:String,
    email:String,
    password:String,
    registrationDate: {type:Date, defaul: Date.now()}
});

userSchema.methods.encryptPassword = (password) =>{
    return bcrypt.hashSync(password, bcrypt.genSaltSync(10));
}

userSchema.methods.comparePassword = (password) =>{
    console.log('password: ',this.password);
    return bcrypt.compareSync(password, this.password);//here this.password is undefined
}

module.exports = mongoose.model('User',userSchema)

调试我看到 user 对象不是 schem class，tuis class 有什么问题？

Answer 1

简而言之，你替换就可以了

userSchema.methods.comparePassword = (password) =>{
    console.log('password: ',this.password);
    return bcrypt.compareSync(password, this.password);//here this.password is undefined
}

和

userSchema.methods.comparePassword = function(password) {
    console.log('password: ',this.password);
    return bcrypt.compareSync(password, this.password);//here this.password is undefined
}

您遇到问题是因为 arrow function 的 lexical scoping。箭头函数从父级继承其 this 作用域。

猫鼬模式上的未定义字段

undefined field on mongoose Schema

node.js

mongoose

bcrypt