I have this basic CRUD methods in Nestjs. The issue I am facing is that when I am applying the getCurrentUserId() method on top on all methods it works fine but when I am applying in bottom it doesnt work and gives error. Is there anything wrong with middleware ?

user.controller.ts

@Controller('users')
@Serialize(UserDto)
export class UsersController {
  constructor(private usersService: UsersService) {}

  @Post('/signup')
  create(@Body() createUserDto: CreateUserDto): Promise<User> {
    return this.usersService.create(createUserDto);
  }

  @Get('/@:userName')
  async getUserByUsername(@Param('userName') userName: string) {
    const user = await this.usersService.findByName(userName);
    console.log(userName);
    if (!user) {
      throw new NotFoundException('User Not Found');
    }

    return user;
  }

  //! Testing for current user
  @Get('/current')
  @UseGuards(JwtAuthGuard)
  async getCurrentUserId(@CurrentUser() id: string) {
    console.log('running endpoint');
    return id;
  }
}

current-user.decorator.ts

import { createParamDecorator, ExecutionContext } from '@nestjs/mon';

export const CurrentUser = createParamDecorator(
  (data : unknown , context : ExecutionContext) => {
    const req = context.switchToHttp().getRequest();
    console.log("I am running")
    return req.id;
  }
)

current-user.middleware.ts

@Injectable()
export class CurrentUserMiddleware implements NestMiddleware {
  constructor(private usersService: UsersService) {}

  async use(req: RequestId, res: Response, next: NextFunction) {
    const token = req.headers['authorization'];
    console.log(token);
    if (!token) {
      throw new UnauthorizedException('Unauthorized');
    }
    try {
      const { userId } =
        await this.usersService.getUserByToken(token);
      req.id = userId;
      console.log(req.id)
      next();
    } catch {
      throw new UnauthorizedException();
    }
  }
}

And I have added the middleware to user.module.ts like this

export class UsersModule {
  configure(consumer: MiddlewareConsumer) {
    consumer.apply(CurrentUserMiddleware).forRoutes(
      'users/current'
    );
  }
}

I have this basic CRUD methods in Nestjs. The issue I am facing is that when I am applying the getCurrentUserId() method on top on all methods it works fine but when I am applying in bottom it doesnt work and gives error. Is there anything wrong with middleware ?

user.controller.ts

@Controller('users')
@Serialize(UserDto)
export class UsersController {
  constructor(private usersService: UsersService) {}

  @Post('/signup')
  create(@Body() createUserDto: CreateUserDto): Promise<User> {
    return this.usersService.create(createUserDto);
  }

  @Get('/@:userName')
  async getUserByUsername(@Param('userName') userName: string) {
    const user = await this.usersService.findByName(userName);
    console.log(userName);
    if (!user) {
      throw new NotFoundException('User Not Found');
    }

    return user;
  }

  //! Testing for current user
  @Get('/current')
  @UseGuards(JwtAuthGuard)
  async getCurrentUserId(@CurrentUser() id: string) {
    console.log('running endpoint');
    return id;
  }
}

current-user.decorator.ts

import { createParamDecorator, ExecutionContext } from '@nestjs/mon';

export const CurrentUser = createParamDecorator(
  (data : unknown , context : ExecutionContext) => {
    const req = context.switchToHttp().getRequest();
    console.log("I am running")
    return req.id;
  }
)

current-user.middleware.ts

@Injectable()
export class CurrentUserMiddleware implements NestMiddleware {
  constructor(private usersService: UsersService) {}

  async use(req: RequestId, res: Response, next: NextFunction) {
    const token = req.headers['authorization'];
    console.log(token);
    if (!token) {
      throw new UnauthorizedException('Unauthorized');
    }
    try {
      const { userId } =
        await this.usersService.getUserByToken(token);
      req.id = userId;
      console.log(req.id)
      next();
    } catch {
      throw new UnauthorizedException();
    }
  }
}

And I have added the middleware to user.module.ts like this

export class UsersModule {
  configure(consumer: MiddlewareConsumer) {
    consumer.apply(CurrentUserMiddleware).forRoutes(
      'users/current'
    );
  }
}

• javascript
• nestjs

• What error do you get? – Daniel Macak Commented Aug 10, 2021 at 5:31
• [Nest] 7533 - 10/08/2021, 11:04:41 am ERROR [ExceptionsHandler] invalid input syntax for type uuid: "current" QueryFailedError: invalid input syntax for type uuid: "current" this error when I am applying getCurrentUserId() at bottom – rickster Commented Aug 10, 2021 at 5:35
• Which nestjs version? – Daniel Macak Commented Aug 10, 2021 at 5:54
• nestjs version : 8.1.1 – rickster Commented Aug 10, 2021 at 5:55
• I think there something with middleware path issue.. And I am not able to resolve that. – rickster Commented Aug 10, 2021 at 5:56

1 Answer 1

The route is matching on @Get('/@:userName') before it makes it to @Get('/current') so its executing the code inside of your getUserByUsername method instead.

Just move getCurrentUserId to the top and you should be fine.

Routes are evaluated in the order they are defined and the first matching one is used to handle the request. In general you should always put the most specific routes (the ones without route params) at the top of your controller to avoid this problem.