I am building RESTful service with NestJs, I have followed the example to build configurations for different environments. It works well for most code. However I am wondering if I can use it in my app.module.ts
?
@Module({
imports: [
TypeOrmModule.forRoot({
type: 'mongodb',
host: `${config.get('mongo_url') || 'localhost'}`,
port: 27017,
username: 'a',
password: 'b',
database: 'my_db',
entities: [__dirname + '/MyApp/*.Entity{.ts,.js}'],
synchronize: true}),
MyModule,
ConfigModule,
],
controllers: [],
providers: [MyService],
})
export class AppModule { }
As you can see I do want to move the MongoDb Url info outside the code and I am thinking to leverage .env
files. But after some attempts, it does not seem to work.
Of course I can use ${process.env.MONGODB_URL || 'localhost'}
instead, and set the environment variables. I'm still curious if I can make the configService
work.
You have to use a dynamic import (see Async configuration). With it, you can inject dependencies and use them for the initialization:
TypeOrmModule.forRootAsync({
imports: [ConfigModule],
useFactory: (configService: ConfigService) => ({
type: 'mongodb',
host: configService.databaseHost,
port: configService.databasePort,
username: configService.databaseUsername,
password: configService.databasePassword,
database: configService.databaseName,
entities: [__dirname + '/**/*.entity{.ts,.js}'],
synchronize: true,
}),
inject: [ConfigService],
}),
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