Exploring the Power of Modules in NestJS

Having trouble with this error - anyone know why?

[Nest] 556   - 2020-06-10 18:52:55   [ExceptionHandler] Nest can't resolve dependencies of the JwtService (?). Check that JWT_MODULE_OPTIONS at index [0] is available in the JwtModule context.

Possible fixes:
- Ensure JWT_MODULE_OPTIONS is a provider within JwtModule
- If JWT_MODULE_OPTIONS is exported from another @Module, make sure it's imported within JwtModule
  @Module({
    imports: [ /* Module containing JWT_MODULE_OPTIONS */ ]
  })

Here are my modules:

@Module({
  imports: [
    PassportModule.register({ defaultStrategy: 'jwt'}),
    JwtModule.register({
      secret: 'topSecret51',
      signOptions: {
        expiresIn: 3600
      },
    }),
    TypeOrmModule.forFeature([User])
  ],
  controllers: [AuthController],
  providers: [AuthService, UserService]
})
export class AuthModule {}
@Module({
  controllers: [UserController],
  providers: [UserService, AuthService],
  imports: [AuthModule]
})
export class UserModule {}
@Module({
  imports: [
    TypeOrmModule.forRoot(typeOrmConfig),
    UserModule,
    AuthModule
  ],
})
export class AppModule {}

I've tried making changes in all modules but still having issues with my app running

Thanks for any assistance!

////////////////////////////////////////////////////

Answer №1

When utilizing certain dependencies of the controller within JwtService, it is important to include JWT_MODULE_OPTIONS as a provider in the existing AuthModule. For detailed instructions on how to register custom providers, refer to the NestJS documentation.

Answer №2

Encountering this error indicates a likely issue with the import or initialization of the JwtModule. The correct setup of the JwtModule is crucial for proper initialization of the JwtService, which appears to be causing the error at hand. It is recommended to begin troubleshooting by examining the configuration of the JwtModule.

    beforeAll(async () => {
        const testingModule: TestingModule = await Test.createTestingModule({
            imports: [
                ConfigModule.forRoot({ isGlobal: true }),
                MongooseModule.forFeature([{ name: 'User', schema: userSchema }]),
                JwtModule.registerAsync({
                    imports: [ConfigModule],
                    inject: [ConfigService],
                    useFactory: async (configService: ConfigService) => ({
                        secret: configService.get('JWT_SECRET'),
                        signOptions: { expiresIn: '1d' }
                    })
                }),
            ],

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