这是因为在您console.log($scope.item.url);运行时，尚未从Firebase加载数据。Angular侦听Firebase /AngularFire发出的通知，以了解何时加载数据，然后更新视图。
另请参阅angularfire-为什么我不能遍历$asArray返回的数组？和尝试从Firebase获取子记录。
解决方法我有以下代码：
factory
app.factory(’Items’,function($firebase,FIREBASE_URL) { var ref = new Firebase(FIREBASE_URL); var items = $firebase(ref.child(’items’)).$asArray(); var Item = {all: function () { return items;},create: function (item) { return items.$add(item);},get: function (itemId) { return $firebase(ref.child(’items’).child(itemId)).$asObject();},update: function (itemId,item) { return $firebase(ref.child(’items’).child(itemId)).update(item);},delete: function (item) { return items.$remove(item);} }; return Item;});
route
app.config(function($stateProvider) { $stateProvider .state(’items_update’,{ url: ’/items/update/:id’,templateUrl: ’views/items/form.html’,controller:’ItemsUpdateController’,resolve:{item:function(Items,$stateParams){ return Items.get($stateParams.id);} }})});
controller
app.controller(’ItemsUpdateController’,function ($scope,item,$state) { $scope.item = item; console.log($scope.item.url); $scope.add = function() {Items.update($scope.item).then(function () { $state.transitionTo(’items’);}); }});
为什么console.log（$ scope.item.url）; 给我不确定的？
但在视图中我拥有所有数据
html
<form role='form' name='form' data-ng-submit='add()'> <div class='form-group'><input type='text' name='title' tabindex='1' placeholder='{{ ’items.form.title’ | translate }}' data-ng-model='item.title' required='required' data-ng-minlength='3' data-ng-maxlength='25' user-feedback /> </div> <div class='form-group'><input type='text' name='ingredients' tabindex='2' placeholder='{{ ’items.form.ingredients’ | translate }}' data-ng-model='item.ingredients' required='required' ng-pattern='/^w(s*,?s*w)*$/' user-feedback /> </div> <div class='form-group'><input type='text' name='price' tabindex='3' placeholder='{{ ’items.form.price’ | translate }}' data-ng-model='item.price' required='required' data-smart-float user-feedback /> </div> <div class='form-group'><button type='button' tabindex='4' item='item' data-uploader>{{ ’items.form.upload’ | translate }}</button><input type='text' name='url' required='required' data-ng-model='item.url' /> </div> <div class='form-group form-no-required clearfix'><div class='pull-right'> <button type='submit' tabindex='5' data-ng-disabled='form.$invalid'>{{ ’items.form.submit’ | translate }}</button></div> </div></form>
ENDS UP
就像@Frank van Puffelen的评论一样，我的解决方法是：
app.controller(’ItemsUpdateController’,function($scope,$state) { item.$loaded().then(function(data) {$scope.item = data; console.log($scope.item.url); }); $scope.add = function() {Items.update($scope.item).then(function() { $state.transitionTo(’items’);}); }});
