How to workraound this TypeORM error, "EntityRepository is deprecated , use Repository.extend function instead"?

Question

However, I can't find any Repository.extend method in Repository class and there's nothing about it in the documentation. How to solve this?

typeorm version: "^0.3.0"

I'm using nest js and trying to create a custom repository.

Answer 1

With the current version of TypeORM, it's possible to implement a custom repository in the following way utilizing DataSource.

// user.repository.ts
@Injectable()
export class UsersRepository extends Repository<UsersEntity> {
  constructor(private dataSource: DataSource) {
    super(UsersEntity, dataSource.createEntityManager());
  }

  async getById(id: string) {
    return this.findOne({ where: { id } });
  }
  // ...
}

The repository is then injected into the service.

// user.service.ts
export class UserService {
  constructor(private readonly userRepository: UserRepository) {}

  async getById(id: string): Promise<User> {
    return this.userRepository.getById(id);
  }
  // ...
}

and the module has imports for the feature and the repository as a provider.

// user.module.ts
@Module({
  imports: [
    TypeOrmModule.forFeature([UserEntity])],
    // ...
  ],
  providers: [UserService, UserRepository],
  // ...
})
export class UserModule {}

Answer 2

First of all:

npm install @nestjs/typeorm@next

NOTE

In my project @nestjs/typeorm version is 9.0.0-next.2 and typeorm version is 0.3.6

Create a folder named database in the src of your project then create two files in (typeorm-ex.decorator.ts and typeorm-ex.module.ts)

// typeorm-ex.decorator.ts

import { SetMetadata } from "@nestjs/common";

export const TYPEORM_EX_CUSTOM_REPOSITORY = "TYPEORM_EX_CUSTOM_REPOSITORY";

export function CustomRepository(entity: Function): ClassDecorator {
  return SetMetadata(TYPEORM_EX_CUSTOM_REPOSITORY, entity);
}

And next file

// typeorm-ex.module.ts

import { DynamicModule, Provider } from "@nestjs/common";
import { getDataSourceToken } from "@nestjs/typeorm";
import { DataSource } from "typeorm";
import { TYPEORM_EX_CUSTOM_REPOSITORY } from "./typeorm-ex.decorator";

export class TypeOrmExModule {
  public static forCustomRepository<T extends new (...args: any[]) => any>(repositories: T[]): DynamicModule {
    const providers: Provider[] = [];

    for (const repository of repositories) {
      const entity = Reflect.getMetadata(TYPEORM_EX_CUSTOM_REPOSITORY, repository);

      if (!entity) {
        continue;
      }

      providers.push({
        inject: [getDataSourceToken()],
        provide: repository,
        useFactory: (dataSource: DataSource): typeof repository => {
          const baseRepository = dataSource.getRepository<any>(entity);
          return new repository(baseRepository.target, baseRepository.manager, baseRepository.queryRunner);
        },
      });
    }

    return {
      exports: providers,
      module: TypeOrmExModule,
      providers,
    };
  }
}

Open your AppModule and modify it like the following:

@Module({
  imports: [
    TypeOrmModule.forRoot({
      type: 'mssql',
      ...
      entities: [Photo],
    }),
    TypeOrmExModule.forCustomRepository([PhotoRepository]),
    ...
  ],
  controllers: [AppController],
  providers: [
    AppService
  ],
})
export class AppModule { }

You can create your customer repository like the following :

@CustomRepository(Photo)
export class PhotoRepository extends Repository<Photo> {
    public async getAllPhoto() {
        const query = this.createQueryBuilder('photo')
            .where('photo.isPublished = :isPublished', { isPublished: true })
        const photos = await query.getMany()
        return photos
    }
}

Everything works perfectly.

Thanks to @anchan828