http调用后如何在视图中更新作用域变量值? [英] How to update scope variable value in view after http call?

问题描述

我正在使用 Angularjs 1.4.3 创建我的第一个项目.

I am making my first project using Angularjs 1.4.3.

在我的控制器中，我正在发出 http 请求，在此http请求的成功方法中，我正在更新范围变量.在http调用中，我获取的是最新值，但在视图端，它没有更新值.

In my controller I am making a http request, in the success method of this http request I am updating a scope variable. In http call I am getting the latest values but in the view side its not updating the values.

柱塞链接 (感谢@rupesh_padhye). (因为它正在调用servlet操作，所以 Plunker 中将不会显示任何数据)

Plunker Link (@rupesh_padhye thanks). (Since it is calling the servlet action, so no data will be shown in Plunker)

app.controller('measuresCtrl', ['$scope', '$modal', '$http', function($scope, $modal, $http) {



    $scope.groups = []
        $scope.loadAllMeasure = function() {
            $http.get("fetchAllMeasure")
            .success(function(data) {
                console.log("Before insert");
                console.log($scope.groups);

                $scope.groups = data.measures;

                console.log("After insert");
                console.log($scope.groups);
            })
            .error(function() {
            });
        };

        $scope.loadAllMeasure();

$scope.submit = function (form) {
$http({
        method: 'POST',
        url: 'saveMeasure',
        data: {
               id: form.id,
               name: form.name,
               description: form.description
              },
        headers: {'Content-Type': 'application/x-www-form-urlencoded'}
        }).success(function(data, status, headers, config) {
           $scope.loadAllMeasure();
        }).error(function(data, status, headers, config) {
   });
 }

})

每当我对度量执行任何CRUD操作时，都会调用方法$scope.loadAllMeasure();.但是它不会更新视图(jsp)页面中的值.

And whenever I am performing any CRUD operation on measures I am calling a method $scope.loadAllMeasure();. But its not updating the values in the view (jsp) page.

我已经尝试过 $ scope.$ apply 方法，但是我正在获取Error: $digest already in progress.

I have tried $scope.$apply method but I am getting Error: $digest already in progress.

当我在成功方法内使用 console.log 打印 $ scope.groups 的值时，然后显示最新的值.

When I printed the value for $scope.groups using console.log inside success method, then its showing the latest values.

在我的视图(jsp)页面中，我只是使用 ng-repeat 函数以表格格式显示所有记录.

In my view (jsp) page I am just using ng-repeat function to show all the records in table format.

我的查看页面的代码(最低代码)-

<div ng-repeat="group in groups | orderBy:'name'">
    <div>
        <input type="checkbox" id="checkbox-{{group.id}}" class="ui-checkbox" /><label for="checkbox-{{group.id}}">{{group.name}}</label>
    </div>
    <div>{{ group.description}}</div>
    <div>   
            <div class="fa fa-pencil button" data="{{group.id}}" id="{{::elementId}}" ng-click="showEditForm(group.id, $event)"></div>
            <div class="fa fa-trash button" data="{{group.id}}" ng-click="deleteGroup(group.id)"></div>
            <div class="fa fa-clone button" data="{{group.id}}" id="{{::elementId}}" ng-click="showCloneForm(group.id, $event)"></div>
    </div>
</div>

console.log中的值

Before insert
Object { id=1,  description="Measure Description1",  name="Demo"}]

还有

After Insert
 [Object { id=1,  description="Measure Description1",  name="Demo"}, Object { id=2,  description="Description2",  name="Demo2"}]

如何在http调用后更新视图中的范围变量值?

推荐答案

我看不到示例代码有什么问题.

I cant see anything wrong with your example code.

我创建了一个JSFiddle来尝试帮助您.

I have created a JSFiddle to try and help you.

服务器调用已被setTimeout函数替换，该函数返回了一个Promise.

The server call has been replaced by a setTimeout function that returns a promise.

请参阅JSFiddle https://jsfiddle.net/sjwkbzxa/

Please see JSFiddle https://jsfiddle.net/sjwkbzxa/

请参见以下示例:

<div data-ng-controller="TestController as vm">
    <button data-ng-click="loadAllMeasure()">Load List from Server</button>
    <ul>
        <li data-ng-repeat="group in groups | orderBy:'name'">
            <span>{{group.description}}</span>
        </li>
    </ul>
</div>

javascript:

The javascript:

angular.module('application',[]).controller("TestController", ['$scope', '$q', function($scope, $q){    
    $scope.groups = [{ id:1,  description:"Initial List",  name:"Demo"}];

    $scope.loadAllMeasure = function(){
       loadData().then(function(data){
         $scope.groups = data;
       });
     };

    function loadData(){
        var deferred = $q.defer();
        setTimeout(function(){
            var data = [{ id:1,  description:"Measure Description1",  name:"Demo"}, { id:2,  description:"Description2",  name:"Demo2"}];
            deferred.resolve(data);
        }, 3000);
       return deferred.promise;
    }
}]);

也许您身边缺少我们看不到的东西?

Maybe you are missing something on your side that we cant see?

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