MongoDB 我应该制作另一个集合还是应该嵌入它

我正在制作一个基于 node js 的音乐应用程序，我选择了 mongodb 作为它的数据库.我知道 mongodb 操作的基本语法，但我是架构设计的新手.mongoDB之前没学过任何数据库软件.

I am making a music app fron node js and i choosed mongodb as database for it. I know basic syntax for mongodb operations but i am new to schema designs. I havent learnt any database software before mongoDB.

所以在这个应用程序中，每次用户喜欢一首歌时，我都会将这首歌的所有重要数据存储在名为 tracker 和 liked 的单独集合中，因此它将是更容易制作推荐算法.users 集合架构是这样的:

So in this app, every time the user likes a song, i store all the important data of that song in seperate collection called tracker and liked so it will be easier to make recommendation algorithm. The users collection schema is like this:

{
  uid: Unique Custom Ids,
  private: {
     email: email,
     phone: number,
  },
  public: {
    profile: {
      info: {
         bio: String,
         name: String,
         username: String
      },
      src: {
        pfpSrc: Url
      }
    }
  }
}

我的跟踪器集合架构如下所示:

And my tracker collections schema looks like:

{
  uid: custom uid,
  byLiked: {
    genre: {
      genreName: "No of time user liked this genre"
    },
    tags: {
      tag: "No of time user liked this tag"
    }
  },
    byPlays: {
    genre: {
      genreName: "No of time user liked this genre"
    },
    tags: {
      tag: "No of time user liked this tag"
    }
  }
}

liked 集合架构如下所示:

{
  uid: "custom uid",
  tracks: [
    {song_id: "custom song id"},
    ...
  ]
}

我应该这样做还是将所有这些集合嵌入users集合的文档中?

Should i do in this way or embed all these collection in documents of users collection?