[ Nestjs] Error: secretOrPrivateKey must have a value

에러 문구

[Nest] 13029 - 05/27/2024, 1:49:37 AM ERROR [ExceptionsHandler] secretOrPrivateKey must have a value Error: secretOrPrivateKey must have a value

   - .env 파일에서 값을 불러 들이지 못하는 상황

 

에러상황 시 코드

auth.module.ts

import * as dotenv from 'dotenv';
dotenv.config();
import { forwardRef, Module } from '@nestjs/common';
import { JwtModule } from '@nestjs/jwt';
import { AuthService } from './auth.service';
import { AuthController } from './auth.controller';
import { UserModule } from '../user/user.module';
import { PassportModule } from '@nestjs/passport';
import { LocalStrategy } from './local.strategy';
import * as process from 'node:process';
import { JwtStrategy } from './jwt.strategy';

@Module({
  imports: [
    JwtModule.register({
      secret: process.env.JWT_SECRET,
      signOptions: { expiresIn: '3m' },
    }),
    forwardRef(() => UserModule),
    PassportModule,
  ],
  providers: [AuthService, LocalStrategy, JwtStrategy],
  controllers: [AuthController],
  exports: [AuthService],
})
export class AuthModule {}

 

구글링을 통해서 동기화의 문제로  .env 이 호출이 되지 않은 것을 파악,

https://stackoverflow.com/questions/58673430/error-secretorprivatekey-must-have-a-value

Error: secretOrPrivateKey must have a value

 

에 있는 답변을 따라  JwtModule.register  -> JwtModule.registerAsync 로 수정

import * as dotenv from 'dotenv';
dotenv.config();
import { forwardRef, Module } from '@nestjs/common';
import { JwtModule } from '@nestjs/jwt';
import { AuthService } from './auth.service';
import { AuthController } from './auth.controller';
import { UserModule } from '../user/user.module';
import { PassportModule } from '@nestjs/passport';
import { LocalStrategy } from './local.strategy';
import { JwtStrategy } from './jwt.strategy';
import { ConfigService } from '@nestjs/config';

@Module({
  imports: [
    JwtModule.registerAsync({
      inject: [ConfigService],
      useFactory: (configService: ConfigService) => ({
        secret: configService.get<string>('JWT_SECRET'),
        signOptions: { expiresIn: '3m' },
      }),
    }),
    forwardRef(() => UserModule),
    PassportModule,
  ],
  providers: [AuthService, LocalStrategy, JwtStrategy],
  controllers: [AuthController],
  exports: [AuthService],
})
export class AuthModule {}

 

추가적으로 

app.module.ts 에서 ConfigModule 을 global 하게 사용할 수 있도록 설정하고

TypeOrmModule 설정도 동기화 문제가 생기지 않도로 아래와 같이 설정

import * as dotenv from 'dotenv';
dotenv.config();
.....

@Module({
  imports: [
    TypeOrmModule.forRootAsync({
      imports: [ConfigModule],
      inject: [ConfigService],
      useFactory: (configService: ConfigService) => ({
        type: 'mysql',
        host: configService.get<string>('DB_HOST'),
        port: configService.get<number>('DB_PORT'),
        username: configService.get<string>('DB_USERNAME'),
        password: configService.get<string>('DB_PASSWORD'),
        database: configService.get<string>('DB_NAME'),
        autoLoadEntities: true,
        synchronize: true,
        logging: true,
        namingStrategy: new SnakeNamingStrategy(),
      }),
    }),
    ConfigModule.forRoot({
      isGlobal: true,
      envFilePath: `.env.${process.env.NODE_ENV}`,
    }),
    ...
  ],
  controllers: [AppController],
  providers: [AppService, ConfigService],
})
export class AppModule {}

 

envFilePath: `.env.${process.env.NODE_ENV} 이 부분은

package.json 에  개발 모드에 따라 다른 .env 를 읽어 올수 있도록 설정한 것을 반영