javascript - 使用 BreezeJs 从 Angular 工厂获取数据

Question

我正在致力于将 Angular 工厂实现到我正在进行的项目中。

我已经开始工作路由:ArtLogMain.js

var ArtLog = angular.module('ArtLog', ['ngGrid', 'ui.bootstrap']);

ArtLog.config(function ($locationProvider, $routeProvider) {
    $locationProvider.html5Mode(true);

    $routeProvider.when("/ArtLog", {
        controller: "ArtLogCtrl",
        templateUrl: "/Templates/ArtLog/Index.html"
    });

    $routeProvider.when("/ArtLog/:Id", {
        controller: "ArtLogEditCtrl",
        templateUrl: "/Templates/ArtLog/Edit.html"
    });

    $routeProvider.when("/ArtLog/Dashboard", {
        controller: "ArtLogDashBoardCtrl",
        templateUrl: "/Templates/ArtLog/Dashboard.html"
    });

    $routeProvider.otherwise("/");
});

接下来我设置工厂:ArtLogDataService

ArtLog.factory("ArtLogDataService", function ($q) {
    breeze.config.initializeAdapterInstance("modelLibrary", "backingStore", true);

    var _artLogView = [];
    var _artLogSingle = [];

    var _getArtLogById = function (Id) {

        var deferred = $q.defer();

        var manager = new breeze.EntityManager('breeze/BreezeData');
        var query = new breeze.EntityQuery().from('Project').where("Id", "Equals", Id);

        manager.executeQuery(query).then(function (data) {
            angular.copy(data, _artLogSingle);
            deferred.resolve();
        }).fail(function () {
            deferred.reject();
        });

        return deferred.promise;
    };

    var _getArtLogView = function () {

        var deferred = $q.defer();

        var manager = new breeze.EntityManager('breeze/BreezeData');
        var query = new breeze.EntityQuery().from('ArtLogView');

        manager.executeQuery(query).then(function (data) {
            //angular.copy(data.results, _artLogView);
            _artLogView = data.results;
            deferred.resolve();
        }).fail(function () {
            deferred.reject();
        });

        return deferred.promise;
    };

    return {
        artLogView: _artLogView,
        artLogSingle: _artLogSingle,
        getArtLogView: _getArtLogView,
        getArtLogById: _getArtLogById
    };
})

Controller :ArtLogController.js

function ArtLogCtrl($scope, ArtLogDataService) {
    $scope.ArtLogData = ArtLogDataService;
    $scope.editableInPopup = '<button id="editBtn" type="button" class="btn btn-primary" ng-click="edit(row)" >Edit</button>';

    ArtLogDataService.getArtLogView();

    $scope.edit = function (row) {
        window.location.href = '/ArtLog/' + row.entity.Id;
    };

    $scope.gridOptions = {
        data: ArtLogDataService.artLogView,
        showGroupPanel: true,
        enablePinning: true,
        showFilter: true,
        multiSelect: false,
        columnDefs: [
            { displayName: 'Edit', cellTemplate: $scope.editableInPopup, width: 80, pinned: true, groupable: false, sortable: false },
            { field: 'ArtNum', displayName: 'Art Number', resizable: true, pinned: true, groupable: false, width: '100px' },
            { field: 'CreateDate', displayName: 'Date Created', cellFilter: "date:'MM-dd-yyyy'", pinnable: false, width: '110px' },
            { field: 'ArtCompletionDue', displayName: 'Art Comp Due Date', cellFilter: "date:'MM-dd-yyyy'", pinnable: false, width: '160px', enableCellEdit: true },
            { field: 'DaysLeft', displayName: 'Days Left', pinnable: false, width: '90px' },
            { field: 'RevisionNum', displayName: 'Rev Number', pinnable: false, width: '100px' },
            { field: 'Status', displayName: 'Status', pinnable: false, width: '80px' },
            { field: 'Template', displayName: 'Template', pinnable: false, width: '190px' },
            { field: 'Driver', displayName: 'Driver', pinnable: false, width: '160px' },
            { field: 'AssignedTo', displayName: 'Assigned To', pinnable: false, width: '160px' },
            { field: 'BuddyArtist', displayName: 'Buddy Artist', pinnable: false, width: '160px' }
        ],
        filterOptions: {
            filterText: "",
            useExternalFilter: false
        }
    };
}

我在 ArtLogDataService.getArtLogData 上设置了断点，并且看到调用触发。我还看到查询运行并返回数据，但是当我查看从工厂返回的 ArtLogDataService 对象时，它始终显示 Array[0]。数据似乎从未绑定(bind)到 artLogView。

我做错了什么？

谢谢!

Answer 1

问题是来自 Breeze 的网络回调不是 Angular 更新循环的一部分。 Angular 不知道您的数据已更改，因此 View 绑定(bind)上的观察者永远不会更新。

当数据返回时，您需要连接 $scope.$apply() 调用。这将导致绑定(bind)注意到数据的变化并更新。

也许是这样的:

ArtLogDataService.getArtLogView().then(function() {
    $scope.$apply();
});

如果您在 Angular 中完成所有操作，则永远不需要调用 $scope.$apply，因为任何可能改变数据的内容(事件、网络响应、超时等)都将由 Angular 处理(通过 $http 和 $timeout 等)和 $apply 将自动被调用。正是在数据被 Angular 外部的事件更改的情况下，$scope.$apply 是必要的。

希望这对您有用!