truncate tables passing entity classes with MikroORM

truncate.ts

import { Constructor } from '@mikro-orm/core';
import { EntityManager } from '@mikro-orm/core';

export async function truncate(em: EntityManager, entities: Constructor[]) {
  const meta = em.getMetadata();

  for (const entity of entities) {
    const entityMeta = meta.get(entity.name);

    if (!entityMeta) {
      throw new Error(`Entity ${entity.name} not found`);
    }

    if (entityMeta.embeddable || entityMeta.abstract || entityMeta.virtual) {
      throw new Error(`Entity ${entity.name} is not a valid entity`);
    }

    await em
      .getConnection()
      .execute(`TRUNCATE ${entityMeta.tableName} CASCADE`);
  }
}