无法使用 PassportJS 读取未定义、NestJS 的属性“validateUser”

Posted 2023-03-13

【中文标题】无法使用 PassportJS 读取未定义、NestJS 的属性“validateUser”

【英文标题】：Cannot read property 'validateUser' of undefined ,NestJS using PassportJS

【发布时间】：2021-05-03 12:05:12

【问题描述】：

我只想在 NestJS 中通过 passportjs 实现身份验证。 当我向“localhost:3000/auth/login”发送帖子请求时出现这些错误。

[ExceptionsHandler] Cannot read property 'validateUser' of undefined
TypeError: Cannot read property 'validateUser' of undefined

这是我的代码：

local.strategy.ts

import  AuthService  from './auth.service';
import  PassportStrategy  from '@nestjs/passport';
import  Strategy  from 'passport-local';
import  UnauthorizedException  from '@nestjs/common';

export class LocalStrategy extends PassportStrategy(Strategy) 
  constructor(private authService: AuthService) 
    super();
  
  async validate(username: string, password: string): Promise<any> 
    console.log(username, password);
    const user = await this.authService.validateUser(username, password); <====This part
    if (!user) 
      return new UnauthorizedException();
    
    return user;
  

auth.service.ts

import  Injectable  from '@nestjs/common';

@Injectable()
export class AuthService 
  users = [ id: 1, username: 'Peyman', password: 'password' ];
  async validateUser(username: string, password: string): Promise<any> 
    console.log('Validate');
    const user = await this.users.find((x) => x.username === username);
    if (user && user.password === password) 
      return user;
    
    return null;
  

auth.module.ts

import  LocalStrategy  from './local.strategy';
import  Module  from '@nestjs/common';
import  PassportModule  from '@nestjs/passport';
import  AuthService  from './auth.service';

@Module(
  imports: [PassportModule],
  providers: [AuthService, LocalStrategy],
  exports: [PassportModule],
)
export class AuthModule 

app.module.ts

import  Contact  from './contacts/contacts.entity';
import  TypeOrmModule  from '@nestjs/typeorm';
import  Module  from '@nestjs/common';
import  ContactsModule  from './contacts/contacts.module';
import  AppController  from './app.controller';
import  AuthModule  from './auth/auth.module';
import  PassportModule  from '@nestjs/passport';

@Module(
  imports: [
    ContactsModule,
    PassportModule,
    TypeOrmModule.forRoot( entities: [Contact] ),
    AuthModule,
  ],
  controllers: [AppController],
  providers: [],
)
export class AppModule 

app.controller.ts

import  Controller, Post, UseGuards, Request  from '@nestjs/common';
import  AuthGuard  from '@nestjs/passport';

@Controller()
export class AppController 
  @UseGuards(AuthGuard('local'))
  @Post('auth/login')
  public async login(@Request() req): Promise<any> 
    return req.user;
  

我通过依赖注入注入了authservice，但出现错误。 我该如何解决这个问题？

【参考方案1】：

将@Injectable() 添加到LocalStrategy 类。

【讨论】：

太酷了兄弟 :)

【参考方案2】：

手动删除 dist 文件夹并重新启动服务器对我有用