重置更改后的值在其他 Ctrl (AngularJS) 中不起作用 [英] Reset the changed values doesn't work in other Ctrl (AngularJS)

问题描述

我对我的问题有点困惑.事实上，我有 2 个视图和 ctrl 正在使用服务.第一个视图包含一个表列表，其中包含将从 WebAPI 加载的项目.该服务向服务器发出请求并提供订单.此外，我正在使用另一个服务来传输另一个 Ctrl 中的选定项目行.这是代码:

I'm a bit confused about my problem. In fact I've 2 views and ctrl who are working with a service. First View contains a tablelist with the items which will load from a WebAPI. The service makes requests to the server and provides to order. Also I'm using another service to transfer the selected item row in the other Ctrl. Here's the Code:

视图 1:

//view1.html
<table class="table table-bordered table-hover">
  <thead>
    <tr>
      <th>Firstname</th>
      <th>Lastname</th>
    </tr>
  </thead>
  <tbody>
    <tr ng-repeat="item in namelist" ng-click="open(this.item)">
      <td>{{ item.fname }}</td>
      <td>{{ item.lname }}</td>
    </tr>
  </tbody>
</table>

Ctrl1:

//FirstCtrl
$scope.namelist = reqService.names.query();

$scope.open = function (item) {
  $scope.selectedItem = item;           
  modalService.openDialog($scope.namelist, $scope.selectedItem);
}

HTTP 服务:

//Service for HTTP Requests
testApp.factory('reqService', ['$resource', 'baseUrl', function ($resource, baseUrl) {
    return {
        names: $resource(baseUrl + '/api/name/:Id', {
            Id: '@Id'
        }, {
            'update': {
                method: 'PUT'
            }
        })
    }
}]);

模态对话框服务:

//Modal dialog service
testApp.factory('modalService', ['$modal', function ($modal) {
    return {
        openDialog: function (namelist, selectedItem) {
            return $modal.open({
                templateUrl: 'views/view2.html',
                controller: 'SecondCtrl',
                resolve: {
                    namedList: function () {
                        return namelist;
                    },
                    selected: function () {
                        return selectedItem;
                    }
                }
            });
        }
    }
}]);

Ctrl2:

testApp.controller('SecondCtrl', ['$scope', '$modalInstance', 'namedList', 'selected', 'reqService', '$http'..., function (...){
   /*copy of the original items*/
   $scope.copyItem = angular.copy(selected);

   $scope.cancel = function () {
      $scope.selected = angular.copy($scope.copyItem);
      $modalInstance.dismiss('cancel');
   }

   $scope.reset = function () {
      $scope.selected = angular.copy($scope.copyItem);
      selected = angular.copy($scope.copyItem); //doesn't work
   }
}

我的问题是如何重置表列表?当我单击 resetBtn 时，它只会重置我的模式窗口中的表单，但更改仍保留在表格列表中?！我无法重置解析变量selected".

My question is how can I reset the tablelist? When I click on resetBtn, it resets only the form in my modal window but the changes remain in the table list?! I cannot reset the resolve variable "selected".

推荐答案

可能是 case pass by value|reference.
阅读这篇JavaScript 是传递引用吗还是传值语言? .

It could be a case pass by value|reference.
Read this Is JavaScript a pass-by-reference or pass-by-value language? .

如果您尝试传递一个重置值的函数，看看它是如何工作的会很有趣.

It would be interesting to see how it works if you try to pass a function that reset the value instead.

Ctrl1:

$scope.open = function (item) {
    $scope.selectedItem = item;           
    modalService.openDialog($scope.namelist, function(e){
        if (e === undefined) {
            return $scope.selectedItem;
        } else {
            $scope.selectedItem = e;
        }
    });
}

Ctrl2 开始:

Ctrl2 began :

testApp.controller('SecondCtrl', ['$scope', '$modalInstance', 'namedList', 'selected', 'reqService', '$http'..., function (...){
    /*copy of the original items*/
   $scope.copyItem = angular.copy(selected());

   $scope.cancel = function () {
      $scope.selected = angular.copy($scope.copyItem);
      $modalInstance.dismiss('cancel');
   }

   $scope.reset = function () {
      $scope.selected = angular.copy($scope.copyItem);
      selected(angular.copy($scope.copyItem));
   }
}

好吧，我知道这很脏，但这只是为了测试假设.

Ok I know it's dirty but it's just to test the assumption.

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