Nest 无法解析 JwtService (?) [JWT_MODULE_OPTIONS] 的依赖项

Posted 2023-03-10

【中文标题】Nest 无法解析 JwtService (?) [JWT_MODULE_OPTIONS] 的依赖项

【英文标题】：Nest can't resolve dependencies of the JwtService (?) [JWT_MODULE_OPTIONS]

【发布时间】：2021-11-24 06:48:33

【问题描述】：

我收到此错误

[Nest] 24356  - 10/03/2021, 11:19:31 AM     LOG [NestFactory] Starting Nest application...
[Nest] 24356  - 10/03/2021, 11:19:31 AM     LOG [InstanceLoader] PrismaModule dependencies initialized +51ms
[Nest] 24356  - 10/03/2021, 11:19:31 AM   ERROR [ExceptionHandler] Nest can't resolve dependencies of the JwtService (?). Please make sure that the argument JWT_MODULE_OPTIONS at index [0] is available in the JwtService context.

Potential solutions:
- If JWT_MODULE_OPTIONS is a provider, is it part of the current JwtService?
- If JWT_MODULE_OPTIONS is exported from a separate @Module, is that module imported within JwtService?
  @Module(
    imports: [ /* the Module containing JWT_MODULE_OPTIONS */ ]
  )

Error: Nest can't resolve dependencies of the JwtService (?). Please make sure that the argument JWT_MODULE_OPTIONS at index [0] is available in the JwtService context.

Potential solutions:
- If JWT_MODULE_OPTIONS is a provider, is it part of the current JwtService?
- If JWT_MODULE_OPTIONS is exported from a separate @Module, is that module imported within JwtService?
  @Module(
    imports: [ /* the Module containing JWT_MODULE_OPTIONS */ ]
  )

    at Injector.lookupComponentInParentModules (/home/luisfelipe/Projects/message-service/node_modules/@nestjs/core/injector/injector.js:193:19)
    at Injector.resolveComponentInstance (/home/luisfelipe/Projects/message-service/node_modules/@nestjs/core/injector/injector.js:149:33)
    at resolveParam (/home/luisfelipe/Projects/message-service/node_modules/@nestjs/core/injector/injector.js:103:38)
    at async Promise.all (index 0)
    at Injector.resolveConstructorParams (/home/luisfelipe/Projects/message-service/node_modules/@nestjs/core/injector/injector.js:118:27)
    at Injector.loadInstance (/home/luisfelipe/Projects/message-service/node_modules/@nestjs/core/injector/injector.js:47:9)
    at Injector.loadProvider (/home/luisfelipe/Projects/message-service/node_modules/@nestjs/core/injector/injector.js:69:9)
    at async Promise.all (index 0)
    at InstanceLoader.createInstancesOfProviders (/home/luisfelipe/Projects/message-service/node_modules/@nestjs/core/injector/instance-loader.js:44:9)
    at /home/luisfelipe/Projects/message-service/node_modules/@nestjs/core/injector/instance-loader.js:29:13```

我尝试在输入某些路由时使用中间件对用户进行身份验证

auth.middleware.ts

import  Request, Response, NextFunction  from 'express';
import  JwtService  from '@nestjs/jwt';

@Injectable()
export class AuthMiddleware implements NestMiddleware 
constructor(private jwtService: JwtService) 

  use(req: Request, res: Response, next: NextFunction) 
    const headerToken = req.headers.authorization;

    if (!headerToken) 
      return res.status(401).send( error: 'No token provided' );
    

    const [scheme, token] = headerToken.split(' ');

    if (!token) 
      return res.status(401).send( error: 'Token error' );
    

    try 
      const user = this.jwtService.verify(token);

      req.user = user.id;

      return next();
     catch (error) 
      return res.status(401).send( error: 'Invalid token' );
    
  
```

auth.module.ts

import  Module  from '@nestjs/common';
import  JwtModule, JwtService  from '@nestjs/jwt';
import  AuthMiddleware  from './auth.middleware';
@Module(
  imports: [
    JwtService,
    JwtModule.register(
      secret: process.env.JWT_SECRET,
      signOptions:  expiresIn: '1day' ,
    ),
  ],
  providers: [AuthMiddleware],
  exports: [AuthMiddleware],
)
export class AuthModule 

我不是 100% 确定中间件应该有一个没有它的模块，中间件将无法工作

app.module.ts

import  MiddlewareConsumer, Module, NestModule  from '@nestjs/common';
import  AppController  from './app.controller';
import  AppService  from './app.service';
import  PrismaModule  from './prisma.module';
import  UsersModule  from './users/users.module';
import  ConnectionsModule  from './connections/connections.module';
import  MessagesModule  from './messages/messages.module';
import  AuthModule  from './auth/auth.module';
import  AuthMiddleware  from './auth/auth.middleware';
@Module(
  imports: [
    PrismaModule,
    UsersModule,
    ConnectionsModule,
    MessagesModule,
    AuthModule,
  ],
  controllers: [AppController],
  providers: [AppService],
)
export class AppModule implements NestModule 
  configure(consumer: MiddlewareConsumer) 
    consumer.apply(AuthMiddleware).forRoutes('users');
  

文档说我需要在此处传递这些选项才能使中间件工作

如果我尝试从 auth.module.ts 中的导入中删除 JwtService，我会得到：

[Nest] 28995  - 10/03/2021, 12:50:31 PM     LOG [InstanceLoader] PrismaModule dependencies initialized +45ms
[Nest] 28995  - 10/03/2021, 12:50:31 PM     LOG [InstanceLoader] JwtModule dependencies initialized +0ms
[Nest] 28995  - 10/03/2021, 12:50:31 PM     LOG [InstanceLoader] MessagesModule dependencies initialized +0ms
[Nest] 28995  - 10/03/2021, 12:50:31 PM     LOG [InstanceLoader] AppModule dependencies initialized +1ms
[Nest] 28995  - 10/03/2021, 12:50:31 PM     LOG [InstanceLoader] AuthModule dependencies initialized +0ms
[Nest] 28995  - 10/03/2021, 12:50:31 PM     LOG [InstanceLoader] UsersModule dependencies initialized +0ms
[Nest] 28995  - 10/03/2021, 12:50:31 PM     LOG [InstanceLoader] ConnectionsModule dependencies initialized +0ms
(node:28995) UnhandledPromiseRejectionWarning: Error: Nest can't resolve dependencies of the class AuthMiddleware 
    constructor(jwtService) 
        this.jwtService = jwtService;
    
    use(req, res, next) 
        const headerToken = req.headers.authorization;
        if (!headerToken) 
            return res.status(401).send( error: 'No token provided' );
        
        const [scheme, token] = headerToken.split(' ');
        if (!token) 
            return res.status(401).send( error: 'Token error' );
        
        try 
            const user = this.jwtService.verify(token);
            req.user = user.id;
            return next();
        
        catch (error) 
            return res.status(401).send( error: 'Invalid token' );
        
    
 (?). Please make sure that the argument JwtService at index [0] is available in the AppModule context.

Potential solutions:
- If JwtService is a provider, is it part of the current AppModule?
- If JwtService is exported from a separate @Module, is that module imported within AppModule?
  @Module(
    imports: [ /* the Module containing JwtService */ ]
  )

    at Injector.lookupComponentInParentModules (/home/luisfelipe/Projects/message-service/node_modules/@nestjs/core/injector/injector.js:193:19)
    at Injector.resolveComponentInstance (/home/luisfelipe/Projects/message-service/node_modules/@nestjs/core/injector/injector.js:149:33)
    at resolveParam (/home/luisfelipe/Projects/message-service/node_modules/@nestjs/core/injector/injector.js:103:38)
    at async Promise.all (index 0)
    at Injector.resolveConstructorParams (/home/luisfelipe/Projects/message-service/node_modules/@nestjs/core/injector/injector.js:118:27)
    at Injector.loadInstance (/home/luisfelipe/Projects/message-service/node_modules/@nestjs/core/injector/injector.js:47:9)
    at Injector.loadMiddleware (/home/luisfelipe/Projects/message-service/node_modules/@nestjs/core/injector/injector.js:56:9)
    at MiddlewareResolver.resolveMiddlewareInstance (/home/luisfelipe/Projects/message-service/node_modules/@nestjs/core/middleware/resolver.js:16:9)
    at async Promise.all (index 0)
    at MiddlewareResolver.resolveInstances (/home/luisfelipe/Projects/message-service/node_modules/@nestjs/core/middleware/resolver.js:13:9)
(Use `node --trace-warnings ...` to show where the warning was created)
(node:28995) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:28995) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.```

如果我尝试在 appModule 上导入 JwtModule 或 JwtService，它会返回与之前相同的错误

我的问题是：我需要导入 JwtService 以在身份验证中间件中使用它，如果我不导入，它说我应该导入它。如果我导入它会返回有关 JWT_MODULE_OPTIONS 的错误

这是我关心的问题还是来自 @nestjs/jwt 的错误，如果这是我创建的错误，我该如何修复它？

整个应用在：https://github.com/akaLuisinho/chat-app

【参考方案1】：

从您的AuthModule 的imports 中删除JwtService。提供者从不属于imports 数组，并且因为您已经导入了JwtModule，所以您不需要将JwtService 添加到任何模块，JwtModule` 已经公开了对它的访问。