firebase - 使用一个参考对象，并推到它的子数组 [英] firebase - Use one ref for an object and push onto it's child array

问题描述

这段代码可以工作，但是我使用两个引用来访问同一个对象的不同区域。

例程可能有多个页面。有没有一种方法来创建新的网页，只需使用一个裁判推送页面到$ scope.routine.pages，也创建一个唯一的ID？

 角.module（'screenTester.auth.routine'，[
'screenTester.auth.routine.page'
]）
 
 .config（['$ stateProvider'，function $ state $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $'$' '，
 templateUrl：'/dist/auth/routine/routine.html'
}）; 
 
}]）
 
 .controller（' RoutineCtrl'，['$ scope'，'$ stateParams'，'$ firebase'，函数（$ scope，$ stateParams，$ firebase）{
 
 $ scope.routineId = $ stateParams.routineId; 
 
 //结合这两者，仍然创建具有唯一ID的页面？
 var ref = new Fire base（https://url.firebaseio.com/user+ $ scope.auth.user.id +'/ routines /'+ $ scope.routineId）; 
 var sync = $ firebase（ref）; 
 
 var ref = new Firebase（https://url.firebaseio.com/user+ $ scope.auth.user.id +'/ routines /'+ $ scope.routineId +'/页面）; 
 var pagesSync = $ firebase（ref）; 
 
 $ scope.createPage = function（）{
 //我会在$ scope.routine中使用什么方法？ 
 $ scope.routinePages。$ add（$ scope.newPage）; 
 $ scope.routinePages。$ save（）; 
 $ scope.newPage = {}; 
 $ scope.toggles.showCreatePage = false; 
}; 
 
 $ scope.init = function（）{
 $ scope.routine = sync。$ asObject（）; 
 $ scope.routinePages = pagesSync。$ asArray（）; 
 
 $ scope.newPage = {}; 
 $ scope.toggles = {}; 
}; 
 
 $ scope.init（）; 
 
}]）; 
  

免责声明：不是我最终的代码，我正在学习firebase是如何工作的，看看它是否是一个好的解决方案。

解决方案

我不认为以任何方式使用多个引用是一个问题。连接到服务器只有一个。

然而，如果你想重用这个实例，你可以尝试这样做：

  var ref = new Firebase（https://url.firebaseio.com/user+ $ scope.auth.user.id +'/ routines /'+ $ scope .routineId）; 
 
 var sync = $ firebase（ref）; 
 
 var pagesSync = $ firebase（ref.child（'pages'））; 
  

这里是 documentation 我指的是

This code works however I'm using two refs to access different areas of the same object.

A routine may have multiple pages. Is there a way to create new pages and just use one ref to push pages onto $scope.routine.pages that also create a unique id?

angular.module('screenTester.auth.routine', [
    'screenTester.auth.routine.page'    
])

.config(['$stateProvider', function($stateProvider) {

    $stateProvider
        .state('auth.routine', {
            url: '/routine/:routineId',
            controller: 'RoutineCtrl',
            templateUrl: '/dist/auth/routine/routine.html'
        });

}])

.controller('RoutineCtrl', ['$scope', '$stateParams', '$firebase', function($scope, $stateParams, $firebase) {

    $scope.routineId = $stateParams.routineId;

    // Combine these two and still create pages with a unique id?
    var ref = new Firebase("https://url.firebaseio.com/user" + $scope.auth.user.id + '/routines/' + $scope.routineId);
    var sync = $firebase(ref);

    var ref = new Firebase("https://url.firebaseio.com/user" + $scope.auth.user.id + '/routines/' + $scope.routineId + '/pages');
    var pagesSync = $firebase(ref);

    $scope.createPage = function() {
        // What method would I use here on `$scope.routine`?        
        $scope.routinePages.$add($scope.newPage);
        $scope.routinePages.$save();
        $scope.newPage = {};
        $scope.toggles.showCreatePage = false;
    };

    $scope.init = function() {
      $scope.routine = sync.$asObject();
      $scope.routinePages = pagesSync.$asArray();

      $scope.newPage = {};
      $scope.toggles = {};
    };

    $scope.init();

}]);

Disclaimer: Not my final code I'm learning how firebase works to see if it's a good solution.

解决方案

I don't think using multiple references is a problem in any way. The connection to server is only one.

however if you want to reuse the instance you can try doing something like this:

var ref = new Firebase("https://url.firebaseio.com/user" + $scope.auth.user.id + '/routines/' + $scope.routineId);

var sync = $firebase(ref);

var pagesSync = $firebase(ref.child('pages'));

and here is the documentation I refer to.

这篇关于firebase - 使用一个参考对象，并推到它的子数组的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！