510課題

sample.ts

export default class Repository<E> {
  user: User;
  entityClass: ObjectType<E>;
  entityManager: EntityManager;

  constructor(user: User, entityClass: ObjectType<E>) {
    this.user = user;
    this.entityClass = entityClass;
    this.entityManager = getManager();
  }

  save = async <T extends E | E[], P extends T extends E ? E : E[]>(entity: P, transaction?: EntityManager): Promise<P> => {
    if (transaction) {
      return await transaction.save(entity);
    }
    return await this.entityManager.save(entity);
  };

  //他の処理
}