NestJS Custom repository

개요

   TypeORM의 Custom Repository를 이용해서 Active Recorder에 없는 method를 추가할 것이다.

categories/repositories/category.repository.ts

import { EntityRepository, Repository } from 'typeorm';
import { Category } from '../entities/category.entity';

@EntityRepository(Category)
export class CategoryRepository extends Repository<Category> {
  async findOneBySlugUsingName(name: string) {
    const categoryName = name.trim().toLowerCase();
    const slug = categoryName.replace(/ /g, '-');

    const category = await this.findOne({ slug });

    if (!category) {
      return undefined;
    }
    return category;
  }
}

  Category라는 Entity를 생성하고 위와 같이 함수를 짜준다. 내가 만든 method는 findOneBySlugUsingName이다. 이 method를 사용하고 싶다면

products.module.ts

import { Module } from '@nestjs/common';
import { TypeOrmModule } from '@nestjs/typeorm';
import { CategoryRepository } from 'src/categories/repositories/category.repository';
import { Product } from './entities/product';
import { ProductsResolver } from './products.resolver';
import { ProductsService } from './products.service';

@Module({
  imports: [TypeOrmModule.forFeature([Product, CategoryRepository])],
  providers: [ProductsResolver, ProductsService],
})
export class ProductsModule {}

   imports에 Category가 아닌 CategoryRepository를 추가하자.

products.service.ts

@Injectable()
export class ProductsService {
  constructor(
    @InjectRepository(Product)
    private readonly products: Repository<Product>,

    private readonly categories: CategoryRepository,
  ) {}
}

   그리고 service에 private readonly categories : CategoryRepository를 추가하자.

Github link

• Custom Repository : https://typeorm.io/#/many-to-one-one-to-many-relations