聊天应用程序中的Firebase实时数据库结构 [英] Firebase realtime database structure in chat app

问题描述

对不起，我的英语水平不好，我来自阿根廷.

sorry for my bad English level, I'm from Argentina.

我在Firebase中具有以下消息数据结构:

I have the following messages data structure in Firebase:

"messages"
   "-KezmqXSdKCNFFA432Uc___-KfCEwklG_y3naRDIUiY"
         "messageDate": "20170620"
         "messageTime": "18:44" 
         "message": "Hi"
   "-KezFDSAADFASFFS3221___-KASDF32324SDFASD1FS"
         "messageDate": "20170620"
         "messageTime": "22:23" 
         "message": "How are you?"

其中 -KezmqXSdKCNFFA432Uc ， -KfCEwklG_y3naRDIUiY ， -KezFDSAADFASFFS3221 和 -KASDF32324SDFASD1FS 是用户的地方.

Where -KezmqXSdKCNFFA432Uc, -KfCEwklG_y3naRDIUiY, -KezFDSAADFASFFS3221 and -KASDF32324SDFASD1FS are users.

我的问题是，我在消息"节点中创建了childEventListener来接收新用户的消息，但是我正在接收所有用户的所有新消息(我在每个应用程序中登录了一个用户)，因为我的childListener位于消息"节点.

My problem is that I created a childEventListener in "messages" node to receive new users messages but I am receiving all the new messages of all the users (I'm logged in one user per app) because my childListener is in "messages" node.

如果添加一条消息时我有1000个用户，那么新消息到达1000个用户是否正确? (假设您在应用程序中，可以检查该消息属于哪个用户.)

Is it correct that if I have 1000 users when adding a message, a new message reaches the 1000 users? (Assuming that within the app, you can check to which user that message belongs).

谢谢！

推荐答案

如果您执行类似以下的结构:

If you do a structure like similar to this:

-chats
   - chatUID
       - members
           - userUID
       - lastMessageSent:messageUID
       - ... more properties  

-chatMessages
   - chatUID
     - messageUID
         - sentBy: userUID
         - messageDate:""
         - messageTime:""
         - message:""

-userChats
    - userUID
       - chatUID

您可以将侦听器附加到/userChats/userUID(将显示活动聊天)，将侦听器附加到/chatMessages/chatUID(将获取特定聊天对话的所有聊天消息).

you can attach a listener to /userChats/userUID, which will display active chats, and a listener to /chatMessages/chatUID, which will get all chat messages for a specific chat conversation.

通过这种方法可以更轻松地设置Firebase安全规则，并且用户仅会收到自己所在的聊天消息.

This way is a lot easier to setup firebase security rules, and users will only receive chat messages which they are apart of.

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