mikro-orm/mikro-orm

import type { Dictionary, EntityManager } from '@mikro-orm/core';

export abstract class Seeder<T extends Dictionary = Dictionary> {

  abstract run(em: EntityManager, context?: T): void | Promise<void>;

  protected async call(em: EntityManager, seeders: { new(): Seeder }[], context: T = {} as T): Promise<void> {
    for (const Seeder of seeders) {
      const fork = em.fork();
      const instance = new Seeder();
      await instance.run(fork, context);
      await fork.flush();
    }
  }

}