javascript - AngularJS 先删除 ref 文档，然后再删除父文档

Question

我有一个删除函数，但它的编码不正确。有时它会抛出错误，因为 game 比所有里程碑更早被删除。如何仅在成功删除所有里程碑后调用 game.$remove()？非常感谢!

$scope.remove = function(game) {
    if(game) { 
        var milestonesToDelete = MilestonesService.query({ gameId: game._id }, function(milestonesToDelete) {
            if(milestonesToDelete) {
                for(var i = 0; i < milestonesToDelete.length; i++) {
                    milestonesToDelete[i].$remove();
                }
            }
        });

        game.$remove();

        for (var j in $scope.games) {
            if ($scope.games [j] === game) {
                $scope.games.splice(j, 1);
            }
        }
    } else {
        $scope.game.$remove(function() {
            $location.path('admin/games');
        });
    }
};

Answer 1

看来您只需要在里程碑查询完成后删除游戏即可。所以只需将该代码粘贴到异步回调中:

$scope.remove = function(game) {
    if(game) { 
        var milestonesToDelete = MilestonesService.query({ gameId: game._id }, function(milestonesToDelete) {
            if(milestonesToDelete) {
                for(var i = 0; i < milestonesToDelete.length; i++) {
                    milestonesToDelete[i].$remove();
                }
            }
            game.$remove();

            for (var j in $scope.games) {
                if ($scope.games [j] === game) {
                    $scope.games.splice(j, 1);
                }
            }
        });

    } else {
        $scope.game.$remove(function() {
            $location.path('admin/games');
        });
    }
};