类型错误：无法读取的未定义的属性“的authenticateUser”

Question

我想打电话叫authenticationService.authenticateUser另一个类的内部函数，它只是返回的属性未定义，我不明白为什么。也许我OOP的知识欠缺，但我找不到任何地方这样的解释。这是我的路由器的NodeJS工作正常。

import * as express from "express";
import { Router, Request, Response, NextFunction } from 'express';
import * as shell from 'shelljs';
import { MongoClient } from'mongodb';
import * as bcrypt from 'bcryptjs';

import { DNSController, IpDataInterface } from '../../controllers/dns.controller';

const dnsController: DNSController = new DNSController()


export const MainRouter = (app: express.Application, authenticationService: any) => {


    app.get('/', (req: Request, res: Response, next: NextFunction) => {

    });

    app.get('/ip-info', (req: Request, res: Response, next: NextFunction) => {
        new Promise((resolve, reject) => {
            dnsController.getIpData(resolve, req);
        })
        .then(
            (data: IpDataInterface) => { res.status(200).send(data); }
        )
        .catch((err) => { res.status(500).send(); })

    });

    app.post('/login', (req: Request, res: Response, next: NextFunction) => {
        console.log(req.body);
        console.log(authenticationService);
        authenticationService.authenticateUser(res, req.body);
    })

}

这是我想达到的服务。

import * as bcrypt from 'bcryptjs';
import * as jwt from 'jsonwebtoken';

import { LocatorService } from '../database/locator.service';
import { UserInterface } from "../../dependencies/index";

// BcryptJS Salt
const salt = bcrypt.genSaltSync(10);
const tokenExp = 60 * 60;

export class AuthenticationService {

    constructor(
        private locatorService: LocatorService
    ) {

    }

    authenticateUser = (res: any, loginData: UserInterface) => {
        console.log('running');
        new Promise((resolve, reject) => {
            this.locatorService.findThisOne(resolve, 'users', 'email', loginData.userName)
        })
        .then(
            (userData: UserInterface) => {
                if( userData.userName === loginData.userName && bcrypt.compareSync(loginData.password, userData.password)) { 
                    //then send a jwt to the user that will be saved locally
                    const token = jwt.sign({ 'id': userData._id, 'role': userData.role }, 'shhhhh', { expiresIn: 60*60 });
                    res.statusMessage = "Login Successful";
                    res.status(200).send({ 'token': token, 'role': userData.role });
                    console.log("User: " + loginData.userName + "\nAuthenticated ; Status: " + res.statusCode + "\nToken Issued");
                } else{ res.statusMessage = 'Access Denied'; res.status(401).send();  }
            },
            (err) => { res.status(500).send(); }
        )
        .catch((err) => { res.statusMessage = "Account Doesn't Exist"; res.status(401).send(); })
    }

Answer 1

我们需要确保类AuthenticationService类在实际情况下的主路由器模块在使用它之前。确保试图调用new AutheticationService( new LocatorService())方法之前，你在呼唤像authenticateUser