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繼火力地堡官方的文檔我的結構我的數據是這樣的:如何使用Angularfire查詢Firebase非規範化數據?
{
"contests": {
"1": {
"start_time": "2016-01-07T05:46:27 -02:00",
"end_time": "2016-08-15T02:00:57 -03:00",
"title": "The Best Voice ever!",
"category": "music",
"videos": {
"video_id_44": true
},
"users": {
"lgraves": true
}
},
....
},
"users": {
"lgraves": {
"p_name": "Lorie",
"l_name": "Graves",
"email": "[email protected]",
"location": "Montana",
"image_url": "https://randomuser.me/api/portraits/men/85.jpg",
"created_time": "2014-12-22T03:40:38 -02:00",
"videos": {
"video_id_44": true
}
},
....
},
"videos": {
"video_id_44": {
"video_url": "www.cdn.video.com/9d0c60af-a069-484e-987f-fad9935dc9a7",
"users": {
"fhenderson": true
}
}, ...
}
}
我的控制器:
var vm = this;
var contestsRef = firebase.database().ref().child("contests");
vm.contests = $firebaseArray(contestsRef); // synchronize the object with a three-way data binding
contestsRef.on("value", function(snapshot) {
var key = snapshot.key(); /// error: snapshot.key is not a function
var childKey = snapshot.val().user;
ref.child("users/" + childKey + "/name").once('value', function(snapshot) {
});
});
當NG-重複上比賽迭代我得到錯誤: 火力警告:異常被拋出用戶回調。 TypeError:snapshot.key不是函數
我的問題是:如何在迭代「比賽」數組時訪問「用戶」和「視頻」,並且在對「比賽」數組進行的任何更改時仍然同步?
的感謝!我現在在下一行(snapshot.val()。user;)上得到undefined。說實話,我不完全明白這些代碼的作用......你有沒有可能獲得ionic1-firebase應用程序的完整示例? – badigard
我GOOGLE了「firebase快照val用戶」,並得到這個:https://firebase.google.com/docs/reference/js/firebase.database.DataSnapshot#val 嘗試'console.log('快照val',快照.val());'在val()返回的對象中查找要查找的內容。 –