NestJS에서 GraphQL 사용하기

Apollo Server Setup

• nestJs의 graphQL은 apollo-server-express를 기반하여 작동한다.
• setting
  npm i @nestjs/graphql graphql-tools graphql apollo-server-express
• app.module.ts

    import { GraphQLModule } from '@nestjs/graphql';

    @Module({
      imports: [GraphQLModule.forRoot({
        autoSchemaFile: true,
      })],
      controllers: [],
      providers: [],
    })
    export class AppModule {}

Validation ArgsType

• Ex) @IsString, @Length ...
• setting
  npm i class-validator class-transformer
• main.ts

    import { ValidationPipe } from '@nestjs/common';

    async function bootstrap() {
      app.useGlobalPipes(new ValidationPipe());
    }
    bootstrap();