Question

在我的单页Angular app中，我有一个控制器，它可以调用数据服务。在数据服务中，结果被推送到名为_result的数组中。在对数据服务的任何后续调用中，都会附加_result数组，而不是先将其清空，这会导致重复数据传递给控制器并显示在视图中。我是Javascript的新手，并寻求帮助以确保对数据服务的任何其他调用仅返回唯一数据。这是我的控制器：

angular.module('frontEndApp').controller('ViewExistingRequestsCtrl', ['$scope', 'requestsRepository',
    function ($scope, requestsRepository) {

        $scope.sendrequest = requestsRepository.getServiceRequests();

        $scope.requests = requestsRepository.result;

    }]
);

这是我的数据服务，它有_result数组：

frontEndApp.factory('requestsRepository',function ($http) {
    var _result = [];
    var postServiceRequest = function (ServiceRequest) {
        $http(
        {
            url: 'http://localhost:8080/api/ServiceRequests', method: "POST", data: ServiceRequest,
            headers: {
                'Content-Type': 'application/json'
            }
        }).success(function (data, status, headers, config) {
            console.log("postServiceRequest Status: " + status);
        }).error(function (data, status, headers, config) {
            console.log("postServiceRequest FAILURE: " + status + "  ServiceRequest:  " + ServiceRequest);
        });
    };
    var getServiceRequests = function () {
        $http({
            method: 'GET', url: 'http://localhost:8080/api/ServiceRequests'
        }).success(function (data, status, headers, config) {

            for (var key in data) {
                _result.push(data[key]);
            } console.log(_result)
            return _result;
        }).error(function (data, status, headers, config) {
            return status;
        });
    };
    return {
        postServiceRequest: postServiceRequest, getServiceRequests: getServiceRequests, result: _result
    };
});

Answer 1

在填充之前将其重新定义为空数组：

...

$http({
        method: 'GET', url: 'http://localhost:8080/api/ServiceRequests'
    }).success(function (data, status, headers, config) {
        _result = []; // <---- this is the key!
        for (var key in data) {
            _result.push(data[key]);
...

如何正确地重新初始化返回数据的数组

1 个答案: