AngularJS $ location.path(路径)起初没有更新 [英] AngularJS $location.path(path) not updating at first

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问题描述

我有一块code,其中我调用$ location.path(名)并没有什么似乎发生(起初)。我可以调用的console.log($ location.path()),它的确实的显示新的路径 - 但视图不会更改

事件(一些异步)链:
我有两个控制器(和匹配的观点),MainCtrl和CpugraphCtrl和服务GetDataService和一个外部数据API(谷歌)。

 按钮在主视图中调用
 功能MainCtrl调用
  功能GetDataService调用
    谷歌客户端API gapi.client.load()与回调
     功能GetDataService,它使用$ $ rootScope广播('GraphUpdate',..)。在MainCtrl,$范围。在$('GraphUpdate',函数(){..})调用
  $ location.path('cpuGraph');

我可以验证(上述),所有的作品去 - 但视图不重新渲染。如果我按一下按钮第二次,它的确实的chnage意见,并使用我CpugraphCtrl重新呈现。如果我调用$范围。$适用()$ location.path(后右)也重新呈现(有时),但有时也报告(在控制台上)在angular.js错误....

我应该调用$范围。$适用()别的地方?

---编辑 - 添加路由配置 -

  angular.module('analytics2App',[
  'ngResource','googlechart'
])
  的.config(函数($ routeProvider){
    $ routeProvider
      。什么时候('/', {
        templateUrl:意见/ main.html中,
        控制器:'MainCtrl
      })
      。当('/ cpuGraph',{
        templateUrl:意见/ cpuGraph.html',
        控制器:'CpugraphCtrl
      })
      。除此以外({
        redirectTo:'/'
      });
  });


解决方案

好吧,最后我得到了这个工作。正如我怀疑,这是获得$范围的问题。$适用()在正确的地方。

谷歌分析通话有所回调回调内,内有回调的参数。所以,最后我做到这一点我AngularJS服务中:

  //这个功能将是一个角度的服务(见最后一行)VAR Graphdata =功能($ rootScope){
    VAR gAPIResult;
    //通过apiQuery称为
    VAR handle_results =功能(结果){
        gAPIResult =结果;
        $ rootScope。$应用(函数(){
            / * ...
            用gAPIResult而不是结果和呼叫
            $ rootScope $广播('GraphUpdate',1)。
            成功
            ... * /
        });
    };
    VAR compare_mobile_cpus =功能(){
        VAR queryParams,apiQuery;
        queryParams = {/ *可以是任何东西* /
            IDS:GA:78752930',
            开始日期:2013年11月7日,
            结束日期:2013年11月9日,
            指标:GA:访问,
            '尺寸':'嘎:EventLabel,GA:日期,
            过滤器:GA:eventAction == CPUTYPE
        };
        尝试{
            apiQuery = gapi.client.analytics.data.ga.get(queryParams);
            apiQuery.execute(handle_results);
        }赶上(E){
            返回false;
        }
        返回true;
    };
   返回{
        init_n_load:功能(){//从控制器称为
            gapi.client.setApiKey('AIzaSyCGcXFQzom1vE5-S'); // API KEY
            gapi.client.load('分析','V3',compare_mobile_cpus);
        },
    };
};angular.module('analytics2App')服务(Graphdata',Graphdata)。

这就是init_n_load()有有回调handle_results(回调compare_mobile_cpus()),其中包含$ rootScope。$适用()......因为,去年的回调有一个结果的参数,我不得不藏匿它的服务$启动前申请()

这确实的工作的...但它是一个最佳的模式呢?保存结果感觉有点脏。

I have a piece of code where I call $location.path(name) and nothing seems to happens (at first). I can call console.log($location.path()) and it does show the new path -- but the view doesn't change.

Chain of events (some asynchronous): I have two controllers (and matching views), MainCtrl and CpugraphCtrl, and a Service GetDataService and one external data API (Google).

button in Main view calls
 function in MainCtrl that calls
  function in GetDataService that  calls
    google client API gapi.client.load() with a callback to
     function in GetDataService, which uses $rootScope.$broadcast('GraphUpdate',..);

in MainCtrl, $scope.$on('GraphUpdate',function() {..}) calls
  $location.path('cpuGraph');

I can verify (mentioned above) that all the pieces go -- but the view doesn't re-render. If I click the button a second time, it does chnage views and re-render using my CpugraphCtrl. If I call $scope.$apply() right after $location.path() it also re-renders (sometimes) but also sometimes reports (on the console) an error in angular.js....

Should I be calling $scope.$apply() somewhere else?

--- edit -- adding route config --

angular.module('analytics2App', [
  'ngResource', 'googlechart'
])
  .config(function ($routeProvider) {
    $routeProvider
      .when('/', {
        templateUrl: 'views/main.html',
        controller: 'MainCtrl'
      })
      .when('/cpuGraph', {
        templateUrl: 'views/cpuGraph.html',
        controller: 'CpugraphCtrl'
      })
      .otherwise({
        redirectTo: '/'
      });
  });

解决方案

Okay, at last I got this to work. As I suspected, it's a matter of getting $scope.$apply() in the right place.

Google Analytics calls have a callback inside a callback and the inner callback has parameters. So in the end I do this inside my AngularJS service:

// this function will be an Angular service (see last line)

var Graphdata = function($rootScope) {
    var gAPIResult;
    // called by apiQuery
    var handle_results = function(results) {
        gAPIResult = results;
        $rootScope.$apply(function() {
            /* ...
            use "gAPIResult" instead of "results" and call
            $rootScope.$broadcast('GraphUpdate', 1);
            on success
            ... */
        });
    };
    var compare_mobile_cpus = function() {
        var queryParams, apiQuery;
        queryParams = { /* could be anything */
            'ids': 'ga:78752930',
            'start-date': '2013-11-07',
            'end-date': '2013-11-09',
            'metrics': 'ga:visits',
            'dimensions': 'ga:EventLabel,ga:date' ,
            'filters': 'ga:eventAction==cputype'
        };
        try {
            apiQuery = gapi.client.analytics.data.ga.get(queryParams);
            apiQuery.execute(handle_results);
        } catch (e) {
            return false;
        }
        return true;
    };
   return {
        init_n_load: function() { // called from the controller
            gapi.client.setApiKey('AIzaSyCGcXFQzom1vE5-s');  // API KEY
            gapi.client.load('analytics', 'v3', compare_mobile_cpus);
        },
    };
};

angular.module('analytics2App').service('Graphdata', Graphdata);

that is, init_n_load() has callback compare_mobile_cpus() which has callback handle_results() which contains $rootScope.$apply()... and because that last callback has a results parameter, I have to stash it on the service before launching $apply()

This does work... but is it an optimal pattern? Saving "results" feels a little dirty.

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