javascript - 序列化 ORM - 错误 : not returning database values

Question

我尝试将密码从数据库返回到另一个 javascript 文件。该函数将正确检索数据。但是当我将值返回给另一个函数时，它将更改为未定义。我想将密码从 model.js 返回到 controller.js。

代码: 模型.js

const Sequelize = require('sequelize'); //import sequelize orm

// connect with psql db
var connection = new Sequelize('emd','postgres','test',{
  dialect : 'postgres'
});

//create a table;
var student = connection.define('student',{
  name : {
    type : Sequelize.STRING,
    allowNull : false},
  email : {
    type: Sequelize.STRING,
    unique : true,
    allowNull : false},
  password : {
    type : Sequelize.STRING,
    allowNull : false },
  mobile : {
    type: Sequelize.BIGINT(11),
    unique : true,
    allowNull : false }
});

var methods = {};
  methods.signup = function(u_name,u_email,u_password,u_mobile){
      connection.sync().then(function(){
        student.create({
          name : u_name,
          email : u_email,
          password : u_email,
          mobile : u_mobile
        });
      });
    }
  methods.login = function(email_id){

    connection.sync().then(function(){
        student.findOne({where : {email : email_id }} ).then(results =>{
          return results.dataValues.password;    
        });
      });
    }

exports.fun = methods;

代码:Controller.js

var model = require('./model.js')

var methods={}
  methods.login = function(email,password){
    let res = model.fun.login(email)
    console.log(res);
    if(password===res){
      console.log("success");
    }
    else {
      console.log("failure");
    }
  }


exports.cont = methods

Answer 1

要添加到@Sagar Jojoriya，

像这样更改你的 model.js

methods.login = function(email_id, callbackFun){
connection.sync().then(function(){
    student.findOne({where : {email : email_id }} ).then(results =>{
      console.log("debug pass => ", results.dataValues.password);
      callbackFun(results.dataValues.password);
    });
  });
}

在你的controller.js中

methods.login = function(email,password){
    model.fun.login(email, function(resPassword) {
        if(password === resPassword){
        console.log("success");
    } else {
      console.log("failure");
    }
  })
}