如何与裁判实现猫鼬中的一对多关系

我有两个模式。 PostSchema:

export type PostDocument = Post & Document;

@Schema({ collection: 'posts' })
export class Post {
  @Prop()
  description: string;
  @Prop()
  title: string;
  // incorrect variant below
  @Prop({
    type: mongoose.Schema.Types.ObjectId,
    ref: 'User',
  })
  _id: ObjectId;
}
const PostSchema = SchemaFactory.createForClass(Post);
export { PostSchema as PostSchema };

和UserSchema:

export type UserDocument = User & Document;

@Schema({
  collection: 'users',
})
export class User {
  @Prop()
  name: string;
  @Prop({
    type: [
      { type: mongoose.Schema.Types.ObjectId, ref: 'Post', autopopulate: true },
    ],
  })
  posts: Post[];
}
const UserSchema = SchemaFactory.createForClass(User);
export { UserSchema as UserSchema };

但我仍然不明白如何将第一张表与第二张表联系起来。在一张桌子上做所有事情要容易得多,但我对裁判的这种方法很感兴趣。