javascript – 在Firebase中建立一个聊天应用程序

我有一个Firebase数据库构造问题.我的场景接近一个聊天应用程序.以下是具体细节

- users(node storing several users of the app)
  - id1
      name: John
  - id2
      name: Meg
  - id2
      name: Kelly
- messages(node storing messages between two users)
  - message1
      from: id1
      to: id2
      text: ''
  - message2
      from: id3
      to: id1
      text: ''

现在想象一下,为个人用户建立一个会话视图.所以我想要从该特定用户获取所有邮件
并对该特定用户

我现在写如下：

let fromMessagesRef = firebase.database().ref('messages').orderByChild('from').equalTo(firebase.auth().currentUser.uid)
fromMessagesRef.once("value").then((snapshot) => {/* do something here*/})

let toMessagesRef = firebase.database().ref('messages').orderByChild('to').equalTo(firebase.auth().currentUser.uid)
toMessagesRef.once("value").then((snapshot) => {/* do something here*/})

问题：

这是模拟问题的正确方法吗？
>如果是,是否有办法组合上述2个查询？

- users(node storing several users of the app)
  - id1
      name: John
      messages
        message1: true
        message2: true
  - id2
      name: Meg
      messages
        message1: true
        message3: true
  - id3
      name: Kelly
      messages
        message2: true
        message3:true
- messages(node storing messages between two users)
  - message1
      from: id1
      to: id2
      text: ''
  - message2
      from: id3
      to: id1
      text: ''
  - message3
      from: id2
      to: id3
      text: ''

let fromMessagesRef = firebase.database().child('users').child(firebase.auth().currentUser.uid).child('messages')