使用AngularJS服务重新加载JSON源

时间:2018-10-27 19:59:28

标签: angularjs json reload

我是AngularJS的新手,我的第一个项目需要您的帮助。

我想从JSON加载数据并使用ng-repeat将其显示在表中,这实际上效果很好。但是我想允许用户通过重新加载JSON重新加载表中的数据。

因此,我首先加载页面。我得到了JSON,并且表格已满。然后,我编辑JSON文件并保存。当我单击重新加载按钮时,收到的数据与加载页面时获得的数据完全相同。我以为是缓存,所以我清理了浏览器缓存,并在get请求中设置了cache:false,但这是行不通的。

这是我的代码:

var routeApp = angular.module("app", ["ui.bootstrap", "ngRoute", "ngSanitize", "ngAnimate", "routeAppControllers"]);

routeApp.config(function ($routeProvider) {
    $routeProvider
        .when("/home", {
            templateUrl: "/SCAP/scap/resources/templates/home.html",
            controller: "ctrlHome"
        })
        .when("/dgroups", {
            templateUrl: "/SCAP/scap/resources/templates/device-groups.html",
            controller: 'ctrlDeviceGroups'
        })
        .when("/templates", {
            templateUrl: "/SCAP/scap/resources/templates/templates.html",
            controller: 'ctrlTemplates'
        })
        .otherwise({
            redirectTo: '/home'
        });
});

var routeAppControllers = angular.module('routeAppControllers', []);

routeAppControllers.controller('ctrlDeviceGroups', function ($scope, groupsService) {

    $scope.dgroups = [];

    var promise = groupsService.getGroups();
    promise.then(function(data) {
        $scope.dgroups = data;
    });

    $scope.reloadJSON = function() {
        $scope.dgroups = [];
        console.log("Cleaning all data...");
        console.log("Reloading JSON");
        var promise = groupsService.getGroups();
        promise.then(function(data) {
            $scope.dgroups = data;
            console.log("New JSON loaded");
            console.log(data);
        });
    }

}).service('groupsService', function($http, $q, $sce) {

    var json_file = "json.json";
    // Add to use that because it didn't trust the domain...
    var trustedUrl = $sce.trustAsResourceUrl(json_file);
    var deferred = $q.defer();
    console.log("Loading JSON...");
    $http(
        {
            method: 'GET',
            url: trustedUrl,
            cache: false
        }).then(function(data) {
        deferred.resolve(data.data);
    });

    this.getGroups = function() {
        return deferred.promise;
    }
});

这是HTML(我删除了无用的行):

<div ng-controller="ctrlDeviceGroups">
<button ng-click="reloadJSON()">Reload entire table</button>
<table>
<tbody>
<tr ng-repeat="item in dgroups">
    <!--TD-->
</tr>

</tbody>


</table></div>

如果您对如何重新加载JSON和视图有任何想法,我将不胜感激。我还注意到,但这不是主题的主题,如果我在$ scope.dgroups中推送数据,则ng-repeat不会刷新。

先谢谢您

1 个答案:

答案 0 :(得分:0)

将GET请求移至服务方法中:

app.service('groupsService', function($http, $sce) {

    var json_file = "json.json";
    // Add to use that because it didn't trust the domain...
    var trustedUrl = $sce.trustAsResourceUrl(json_file);

    this.getGroups = function() {
        console.log("Loading JSON...");
        var config = {
            method: 'GET',
            url: trustedUrl,
            cache: false
        };
        return $http(config)
          .then(function(response) {
            return response.data;
        });
    };
});