Firebase：从Key Objects获取列表

Question

我希望得到每个实例的/玩家..用钥匙。我该如何实现？ 我找不到任何东西。 我的结构是这样的：

我正在获得其他值（日期，状态，时间）。

 this.gamesRef = db.list('/games');
    this.allGames = this.gamesRef.snapshotChanges().map(changes => {
        return changes.map(c => ({ key: c.payload.key, ...c.payload.val() 
    }));
  });

    <div *ngFor="let game of allGames | async">
        <span class="game-div-date">{{game.date}}</span>
        <span class="game-div-clock">{{game.time}}</span>
   </div>

（我正在使用Firebase和Angular2）

Answer 1

试试这个

this.gamesRef = db.list('/games');
    this.allGames = this.gamesRef.snapshotChanges().map(changes => {
        return changes.map(c => { 
          const games;
          games.key= c.payload.key;
          games.satus = c.payload.val().status;
          games.time = c.payload.val().time;

          let players=[]
          c.payload.val().players.forEach(player=>{
            players.push(player);
          })

          games.players = players;

          return games;
    });
});

这将创建您可以使用的自定义数据

<div *ngFor="let game of allGames | async">
    <span class="game-div-date">{{game.date}}</span>
    <span class="game-div-clock">{{game.time}}</span>
    <div *ngFor="let player of game.players">
        <span>{{player | json}}</span>
    </div>
</div>