我目前正在使用firebase和angularJS（離子）開發應用程序?；旧线@是一個汽車管理應用程序，所以你有人與他人分享他們的汽車。我試圖將數據結構盡可能平坦以提高效率。我的問題是如果沒有問題我可以顯示與登錄用戶共享的不同汽車的car_id列表，我找不到顯示與顯示年份和模型的用戶共享的汽車列表的方法。預先感謝您的幫助 ！{"rules": { "users": { ".write": true, "$uid": { ".read": "auth != null && auth.uid == $uid" }, "cars": { "car_id":true, "role":true // Owner, borower... } }, "cars": { "car_id":true, "model":true, "year":true }}}carapp.controller("carsController", function($scope, $firebaseObject, $ionicPopup, $ionicHistory) {$ionicHistory.clearHistory();$scope.list = function() { frbAuth = frb.getAuth(); if(frbAuth) { var userObject = $firebaseObject(frb.child("users/" + frbAuth.uid)); userObject.$bindTo($scope, "user"); $scope.cars = frb.child("cars");}}$scope.createCar = function() { $ionicPopup.prompt({ model: 'Create a new car', inputType: 'text' }) .then(function(result) { if(result !== "") { var newCar = $scope.cars.push({ model: result }) var newCarId = newCar.key(); $scope.user.cars.push({car_id: newCarId, role: "owner" }); } else { console.log("Action not completed"); }});}}）; <div class="list"> <a ng-repeat="car in user.cars" > <h2>{{car.car_id}}</h2> ----> works fine !<h2>{{car.model}}</h2> ----> How to get this working ? <h2>{{car.year}}</h2> ----> How to get this working ? </a></div>
1 回答
偶然的你
TA貢獻1841條經驗 獲得超3個贊
在users/路徑中，首先按索引存儲汽車列表，而不是存儲在數組中。所以你的結構將是：
{
"users": {
"kato": {
"cars": {
"DeLorean": true
}
}
},
"cars": {
"DeLorean": {
model: "DeLorean",
year: "1975"
}
}}要使用AngularFire加入此項，您可以使用多種方法。一個AngularFire專用解決方案可能看起來像這樣，利用$ extend：
app.factory('CarsByUser', function($firebaseArray) {
return $firebaseArray.$extend({
$$added: function(snap) {
return new Car(snap);
},
$$updated: function(snap) {
// nothing to do here; the value of the index is not used
},
$$removed: function(snap) {
this.$getRecord(snap.key()).destroy();
},
// these could be implemented in a manner consistent with the
// use case and above code, for simplicity, they are disabled here
$add: readOnly,
$save: readOnly });
var carsRef = new Firebase(...).child('cars');
function Car(snap) {
// create a reference to the data for a specific car
this.$id = snap.key();
this.ref = carsRef.child(this.$id);
// listen for changes to the data
this.ref.on('value', this.updated, this);
}
Car.prototype.updated = function(snap) {
this.model = data.model;
this.year = data.year;
}
Car.prototype.destroy = function() {
this.ref.off('value', this.meta, this);
};
function readOnly() { throw new Error('This is a read only list'); }});app.controller('...', function($scope, CarsByUser, authData) {
// authenticate first, preferably with resolve
var ref = new Firebase(...).child(authData.uid);
$scope.cars = CarsByUser($scope);});對于更復雜和更優雅的方法，可以使用NormalizedCollection并將該ref傳遞給AngularFire數組：
app.controller('...', function($scope, $firebaseArray) {
var ref = new Firebase(...);
var nc = new Firebase.util.NormalizedCollection(
ref.child('users/' + authData.uid),
ref.child('cars')
)
.select('cars.model', 'cars.year')
.ref();
$scope.cars = $firebaseArray(nc);});- 1 回答
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