在AngularJS工厂中访问$ scope？

Question

我是AngularJS的新手,发现它非常有趣,但我对以下情况有点不清楚.

app.factory('deleteFac', function($http){

var factory = {}; 

factory.edit = function(id){
  $http.get('?controller=store&action=getDetail&id=' + id).
    success(function(data, status){
        /** 
        got an error on the following 
        when i use return data; and i get data undefined 
        in the controller which i get it because its doing a ajax call
        you don't get data until the call first.
        **/
        $scope.detail = data;
      })
    }

return factory;
})

当我分配$scope并使用返回数据时,我收到错误,无论如何我可以将返回数据分配给$scope？

Answer 1

您通常不在$scope工厂,服务或提供商内部使用.通常,您将返回promise(返回者$http)然后在控制器中处理promise(您确实拥有$scope).

factory.edit = function(id){
    return $http.get('?controller=store&action=getDetail&id=' + id);
}

控制器功能:

$scope.edit = function(id) {

    deleteFac.edit(id).then(function(response) {
        $scope.something = response.model;
    });
}

Answer 2

我想你的意思是:

app.factory('deleteFac', function($http){

  var service = {}; 

   factory.edit = function(id, success, error){
        var promise = $http.get('?controller=store&action=getDetail&id=' + id);
        if(success)
           promise.success(success);
        if(error)
           promise.error(error);
   };

   return service;
});

然后在你的控制器中你做:

function MyController($scope, deleteFac){
   deleteFac.edit($scope.id, function(data){
       //here you have access to your scope.
   });
}

Answer 3

以下技巧是一种非常糟糕的做法,但如果你赶时间,你可以使用它:

兑换$scope:angular.element('[ng-controller=CtrlName]').scope()

Answer 4

就我个人而言，我想使用工厂中的范围，因此，我不会将范围作为参数从调用 factory.function() 的客户端传递，而不是全部移出。

我在尝试使用 $scope.watch(...) 时也遇到了同样的问题，因为我们不能直接从工厂或服务中使用 $scope，但我想让它以这种方式工作，所以这就是为什么我刚刚更新了我的函数将范围作为参数并让工厂的客户端发送 $scope。所以，这将是我的解决方案：

var app = angular.module("myApp", []);

app.factory('MyFactory', function($http) {

      var factory = {};
      //This is only for my own issue I faced.
      factory.Images = {};

      factory.myFunction = function(id, scope) {
        //This is an example of how we would use scope inside a factory definition
        scope.details = "Initial Value";
        //In my case I was having this issue while using watch
        scope.$watch('details' , function(newValue, oldValue) {
          if(oldValue){
             scope.log = "Details was updated to : " +newValue;
            }
        });
        
        scope.details = "My Id is: "+id;
       };
        return factory;
});

//Controller: Factory's Client.
app.controller("MyController", ['$scope', 'MyFactory', function($scope, MyFactory) {
  
        MyFactory.myFunction(5, $scope);
}]);

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div ng-app="myApp" ng-controller="MyController">
  <span>{{details}} </span>
  <hr>
  <p>{{log}} </p>
</div>

我希望这会有所帮助。问候。