Multer是与节点js一起使用的模块，用于表示上传文件。我在角端使用ng-file上传模块。

当我一一发送多个文件时，它工作正常，没有任何错误，但是当我以数组格式一次发送所有文件时，然后我按照Multer的github的建议在服务器端进行必要的更改，仍然会出现错误。

这是错误

Error: Unexpected field
    at makeError (C:\nodefiles\new\node_modules\multer\lib\make-error.js:12:13)
    at wrappedFileFilter (C:\nodefiles\new\node_modules\multer\index.js:39:19)
    at Busboy.<anonymous> (C:\nodefiles\new\node_modules\multer\lib\make-middleware.js:109:7)
    at Busboy.emit (events.js:118:17)
    at Busboy.emit (C:\nodefiles\new\node_modules\multer\node_modules\busboy\lib\main.js:31:35)
    at PartStream.<anonymous> (C:\nodefiles\new\node_modules\multer\node_modules\busboy\lib\types\multipart.js:209:13)
    at PartStream.emit (events.js:107:17)
    at HeaderParser.<anonymous> (C:\nodefiles\new\node_modules\multer\node_modules\busboy\node_modules\dicer\lib\Dicer.js:51:16)
    at HeaderParser.emit (events.js:107:17)
    at HeaderParser._finish (C:\nodefiles\new\node_modules\multer\node_modules\busboy\node_modules\dicer\lib\HeaderParser.js:70:8)
    at SBMH.<anonymous> (C:\nodefiles\new\node_modules\multer\node_modules\busboy\node_modules\dicer\lib\HeaderParser.js:42:12)
    at SBMH.emit (events.js:118:17)
    at SBMH._sbmh_feed (C:\nodefiles\new\node_modules\multer\node_modules\busboy\node_modules\dicer\node_modules\streamsearch\lib\sbmh.js:159:14)
    at SBMH.push (C:\nodefiles\new\node_modules\multer\node_modules\busboy\node_modules\dicer\node_modules\streamsearch\lib\sbmh.js:56:14)
    at HeaderParser.push (C:\nodefiles\new\node_modules\multer\node_modules\busboy\node_modules\dicer\lib\HeaderParser.js:48:19)
    at Dicer._oninfo (C:\nodefiles\new\node_modules\multer\node_modules\busboy\node_modules\dicer\lib\Dicer.js:198:25)

样例控制器代码

var app = angular.module('fileUpload', ['ngFileUpload']);

app.controller('MyCtrl', ['$scope', 'Upload', '$timeout', function ($scope, Upload, $timeout) {
    $scope.uploadFiles = function (files) {
        $scope.files = files;
        if (files && files.length) {
            console.log(files);
            Upload.upload({
                url: '/api/data/addtweet',
                data: {
                    files: files
                }
            }).then(function (response) {
                $timeout(function () {
                    $scope.result = response.data;
                });
            }, function (response) {
                if (response.status > 0) {
                    $scope.errorMsg = response.status + ': ' + response.data;
                }
            }, function (evt) {
                $scope.progress =
                    Math.min(100, parseInt(100.0 * evt.loaded / evt.total));
            });
        }
    };
}]);

请告诉我我在做什么错。谷歌搜索不是那么有用，我已经尝试过了，为什么我要在这里发布。