Question

我有一个RESTful API，为我提供员工和部门。在我的AngularJS应用程序中，我需要了解员工和员工所属的部门。我为此定义了两个工厂服务：

angular.module('myApp.services', [])
    .factory('Employee', function ($resource) {
        return $resource ('/api/employees/:id', { id: '@id' });
    })
    .factory('Department', function ($resource) {
        return $resource ('/api/departments/:id', { id: '@id' });
    })
;

在控制器中，我打电话：

$scope.employee = Employee.get({id: 'me'});

接下来，我想打电话：

$scope.departments = [];
angular.forEach($scope.employee.departmentIds, function (departmentId) {
    $scope.departments.push(Department.get({ id: departmentId }));
});

但$scope.employee是一个承诺对象，因此只有在第一个请求完成时才会知道$scope.employee.departmentIds。

我可以这样解决：

Employee.get({id: 'me'}).$promise.then(function (employee) {
    $scope.employee = employee;
    $scope.departments = [];
    angular.forEach(employee.departmentIds, function (departmentId) {
        $scope.departments.push(Department.get({ id: departmentId }));
    });
});

问题是我需要在多个控制器中使用此信息，并且不希望在每个控制器中重复此代码。所以我的问题是：有没有办法将这两种资源结合起来，提供员工数据和该员工所属部门的数据？

Answer 1

你可以这样做：

angular.module('myApp.services', [])
    .factory('SimpleEmployee', function ($resource) {
        return $resource ('/api/employees/:id', { id: '@id' });
    })
    .factory('Department', function ($resource) {
        return $resource ('/api/departments/:id', { id: '@id' });
    })
    .factory('Employee', ['SimpleEmployee', 'Department', function(SimpleEmployee, Department) {
        return {
            get: function(params) {
                var data = SimpleEmployee.get({id: params.id}, function (employee) {
                    var obj = {
                        employee: employee,
                        departments: []
                    };                        
                    angular.forEach(employee.departmentIds, function (departmentId) {
                        obj.departments.push(Department.get({ id: departmentId }));
                    });
                    return obj;
                });
                return data;
            }
        }
    }]);

你不需要改变控制器中的任何东西。

Answer 2

这个答案基于@Beterraba的答案（但答案中的代码示例不正确）：

服务：

angular.module('myApp.services', [])
    .factory('SimpleEmployee', function ($resource) {
        return $resource ('/api/employees/:id', { id: '@id' });
    })
    .factory('Department', function ($resource) {
        return $resource ('/api/departments/:id', { id: '@id' });
    })
    .factory('Employee', ['SimpleEmployee', 'Department', function(SimpleEmployee, Department) {
        return {
            get: function(params) {
                return SimpleEmployee.get({id: params.id}).$promise.then(function (employee) {
                    employee.departments = [];
                    angular.forEach(employee.departmentIds, function (departmentId) {
                        employee.departments.push(Department.get({ id: departmentId }));
                    });
                    delete employee.departmentIds;
                    return employee;
                });
            }
        }
    }]);

控制器：

Employee.get({ id: 'me' }).then(function (employee) {
    $scope.employee = employee;
});

从AngularJS 1.2 RC3开始，您需要解开控制器上的任何承诺对象。我发现了这些信息here。

commit
issue

结合AngularJS中的资源

2 个答案: