[Nest.js] ElasticSearch 사용하기

설치

npm i --save @nestjs/elasticsearch @elastic/elasticsearch

사용하기

• useFactory, configService 로 비동기로 설정
  • client configuration 은 link 참조

ElasticsearchModule.registerAsync({
  imports: [ConfigModule],
  useFactory: async (configService: ConfigService) => ({
    node: configService.get('ELASTICSEARCH_NODE'),
  }),
  inject: [ConfigService],
}),

• ElasticSearch injection

@Injectable()
export class SearchService {
  constructor(private readonly elasticsearchService: ElasticsearchService) {}
}

• @nestjs/elasticsearch 의 ElasticsearchService 는 @elastic/elasticsearch 의 Client를 래핑하는 형태이다.
  • 따라서 API 도 동일

  await client.index({
    index: 'game-of-thrones',
    document: {
      character: 'Ned Stark',
      quote: 'Winter is coming.'
    }
  })

  const result= await client.search({
    index: 'game-of-thrones',
    query: {
      match: { quote: 'winter' }
    }
  })

reference

• Github nestjs/elasticsearch
• ElasticSearch javascript client