Multiple MongoDB Connections

To have multiple MongoDB connections one needs to add a connectionName string to forRoot and forFeature.

forRoot usage

app.module.ts

import { Module } from "@nestjs/common";
import { TypegooseModule } from "@m8a/nestjs-typegoose";

@Module({
  imports: [
    TypegooseModule.forRoot("mongodb://localhost:27017/otherdb", {
      connectionName: "other-mongodb"
    }),
    CatsModule
  ]
})
export class ApplicationModule {}

cat.module.ts

@Module({
  imports: [TypegooseModule.forFeature([Cat], "other-mongodb")],
  controllers: [CatsController],
  providers: [CatsService]
})
export class CatsModule {}

Here the CatsService will use the other-mongodb connection defined in the forRoot.

forRootAsync usage

Same cat.module.ts as above for the forFeature.

cat.module.ts

@Module({
  imports: [TypegooseModule.forFeature([Cat], "other-mongodb")],
  controllers: [CatsController],
  providers: [CatsService]
})
export class CatsModule {}

And for forRootAsync add connectionName to the options as well.

@Module({
  imports: [
    TypegooseModule.forRootAsync({
      connectionName: "other-mongodb",
      imports: [ConfigModule],
      useFactory: async (configService: ConfigService) => ({
        uri: configService.getString("MONGODB_URI"),
        // ...typegooseOptions (Note: config is spread with the uri)
      }),
      inject: [ConfigService]
    })
  ]
})
export class CatsModule {}

Added in 11.1.0 - You can now inject a connection into your services.

You can now inject a connection inside of your services, when needed.

import { Injectable } from '@nestjs/common';
import { InjectConnection } from '@m8a/nestjs-typegoose';
import { Connection } from 'mongoose';

@Injectable()
export class CatsService {
  constructor(@InjectConnection() private connection: Connection) {}
}