即使成功响应，firebase数据库也不会更新

Question

I have a chat app that I am building in ionic and firebase. I have a simple join channel function that takes the channel id, and adds the current user id to the list of member in the database. According to everything I am seeing it is working correctly, however whenever I go to the firebase console it is not showing the new item in the database. Here is the code I am using to add the item to the database when a user joins a chat channel...

joinChannel(type, user_id) {
    return new Promise((resolve, reject) => {
      if(this.availableChannels[type] !== undefined) {
        console.log("joining channel: " + type);
        console.log('for user: ' + user_id);
        let update = {};
        update['/chat/members/' + type + '/' + user_id] = {active: true, joinedAt: firebase.database.ServerValue.TIMESTAMP};
        this.afDB.database.ref().update(update).then(() => {
          console.log("updated /chat/members/" + type + "/" + user_id + " to");
          console.log({active: true, joinedAt: firebase.database.ServerValue.TIMESTAMP});
          this.activeChannel = '/channels/' + type;
          resolve(true);
        })
      } else {
        reject("channel_not_found");
      }
    });
  }

Now, if I open up the developer console in chrome and click to join the channel I get this in the console...

joining channel: news
chat.ts:210 for user: [USERIDHERE]
chat.ts:214 updated /chat/members/news/[USERIDHERE] to
chat.ts:215 Object
              active: true
              joinedAt: Object
                .sv: "timestamp"
              __proto__: Object
              __proto__: Object

So the console shows that the database ran the update, however if I then log into my firebase console, there is no "news" item in the "chat/members" database. I have tried it with different channels, and always I get the same exact response from firebase, saying it updated the database, but in the firebase console that item remains blank.

Just in case it is needed the this.afDB variable is public afDB: AngularFireDatabase in the constructor. I know the database is working because I can update things, send messages in chat channels and they appear in the firebase console, but for whatever reason, when a user joins a channel, I get the successful console log, but the database is not updating with the new information. I am really lost on this one and could really use some help.

Answer 1

it seems to me you want to use a set instead of update

 this.afDB.database.ref('/chat/members/' + type + '/' + user_id) .set({active: true, joinedAt: firebase.database.ServerValue.TIMESTAMP});