@Entity()
export class A {
  @PrimaryKey()
  _id = randomUUID();
  
  @Property()
  complexName!: string;
}

orm = await MikroORM.init({
  entities: [A],
  clientUrl: await initMongoReplSet('mikro-orm-test'),
  driver: MongoDriver,
  namingStrategy: UnderscoreNamingStrategy,
});
await orm.schema.clearDatabase()

const a = new A();
a.complexName = 'a';
const b = new A();
b.complexName = 'b';
await orm.em.persistAndFlush(a);
await orm.em.persistAndFlush(b);
orm.em.clear();

const data2 = await orm.em.find(A, {}, {
  orderBy: { complexName: 'desc' },
});
expect(data2[0].complexName).toBe('b');