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如何将数组成功发布到Firebase数据库

google-cloud-functions firebase-realtime-database firebase arrays javascript

Deji James · 技术社区 · 6 年前

以下是我的玩家JSON快照:

下面是在客户端选择玩家的代码:

$scope.history=[];
$scope.picked = [];

 $scope.buy = function(player) {
        //remove if already added locally
        var index = $scope.history.indexOf(player);
        var index2 = $scope.picked.indexOf(player.id);
        if(index>=0 || index2>=0 ){
            $scope.history.splice(index,1);
            $scope.picked.splice(index2,1);
            return;
        }
 
        //max 11 allowed
        if($scope.history.length>=10 || $scope.picked.length>=10){
            alert('max 10 players allowed');
            return;
        }
        //to make sure moeny doesn't go below $10,000,000
        if($scope.total<0){
            alert('Oops! You have run out of cash');
            return;
        }
 
        var selected = $scope.history.reduce(function(a,b){
            a[b.position] = (a[b.position] || 0) + 1;
            return a;
        }, {}) || {};
 
        if(!selected[player.position] || selected[player.position]<4 && 
            $scope.total>0){
            $scope.history.push(player);
            $scope.picked.push(player.id);
               
        }else{
            alert('You can add only four players per position');
             
        }
      };

[
0: {Team: "AC Izzue", assists: 0, cost: "5m", goals: 0, id: 1, â¦}
1: {Team: "AC Izzue", assists: 0, cost: "5m", goals: 0, id: 2, â¦}
2: {Team: "AC Izzue", assists: 0, cost: "5m", goals: 0, id: 3, â¦}
3: {Team: "AC Izzue", assists: 0, cost: "5m", goals: 0, id: 4, â¦}
4: {Team: "AC Izzue", assists: 0, cost: "5m", goals: 0, id: 5, â¦}
5: {Team: "AC Izzue", assists: 0, cost: "5m", goals: 0, id: 6, â¦}
6: {Team: "AC Izzue", assists: 0, cost: "5m", goals: 0, id: 7, â¦}
7: {Team: "After Hours FC", assists: 0, cost: "5m", goals: 0, id: 16, â¦}
8: {Team: "Alaye FC", assists: 0, cost: "5m", goals: 0, id: 27, â¦}
9: {Team: "Alaye FC", assists: 0, cost: "5m", goals: 0, id 26}
]

每次我试着 push set

错误:参考.推送失败:第一个参数在属性“”中包含无效的键($id)用户.UhIBZDBaLcTcesdRiJ9u7xYv9bd2.picked.0'。键必须是非空字符串,并且不能包含“.”、“\”、“$”、“/”、“[”或“]”

是否可以在firebase上的用户地址上成功地发布阵列,或者阵列是否必须更改?

0 回复 | 直到 6 年前

Renaud Tarnec 6 年前

如果你想在你的Firebase实时数据库中获取你在问题所附截图中显示的内容,你需要将一个对象数组传递给 set()

  firebase
    .database()
    .ref('players')
    .set([
      { Team: 'AC Izzue', assists: 0, cost: '5m', goals: 0, id: 1 },
      { Team: 'AC Izzue', assists: 0, cost: '5m', goals: 0, id: 2 },
    ]);

push()

   "players" : {
    "-MESdJeoccFv8mc5Qhhd" : [ {  // <=== auto-generated key
      "Team" : "AC Izzue",
      "assists" : 0,
      "cost" : "5m",
      "goals" : 0,
      "id" : 1
    }, {
      "Team" : "AC Izzue",
      "assists" : 0,
      "cost" : "5m",
      "goals" : 0,
      "id" : 2
    } ]
  }