在laravel警报

Question

我正在尝试上传文本文件。我希望在文件上传之前向用户发出警报此文件包含的多少记录（不匹配），这些记录尚未在数据库中。我正在尝试获取它（计数） ＆gt; 0）.file上传工作正常。但我正在努力与alert.how我可以这样做。

这是我的代码

控制器

public function uploadAttendanceFile(Request $request)
{

        if ($request->hasFile('file')) {

            $file = $request->file('file');

            $name = $file->getClientOriginalName();
            $attendanceSheet = new AttendanceSheet();
            $attendanceSheet->name = $name;
            $attendanceSheet->created_by = Auth::user()->id;
            $attendanceSheet->modified_by = Auth::user()->id;
            $attendanceSheet->save();


            $csvMimes = array('text/x-comma-separated-values', 'text/comma-separated-values', 'application/octet-stream', 'application/vnd.ms-excel', 'application/x-csv', 'text/x-csv', 'text/csv', 'application/csv', 'application/excel', 'application/vnd.msexcel', 'text/plain');
            if (!empty($_FILES['file']['name']) && in_array($_FILES['file']['type'], $csvMimes)) {
                if (is_uploaded_file($_FILES['file']['tmp_name'])) {

                    $csvFile = fopen($_FILES['file']['tmp_name'], 'r');
                    fgetcsv($csvFile);

                    while (($line = fgetcsv($csvFile)) !== FALSE) {

                        $date = implode(" ", $line);

                        $x = mb_substr($date, 0, 20);
                        $y = mb_substr($date, 41, 60);
                        $epf = str_replace(' ', '', $x);
                        $fdate = array_filter(explode(" ", $y));

                        /*dd($fdate);*/

                        $a_date = date("Y-m-d", strtotime($fdate[9]));

                        $sql = "SELECT * from attendanceLogs where emp_id ='$epf' AND date ='$a_date' AND time='$fdate[10]' AND session='$fdate[11]'";
                        $result = DB::select(DB::raw($sql));
                        $count = count($result);

                        if ($count > 0) {

                            return redirect()->back()->with('message', 'IT WORKS!');
                        }
                        else {
                            $csv = new AttendanceLogs();

                            $csv->emp_id = $epf;
                            $csv->date = $a_date;
                            $csv->time = $fdate[10];
                            $csv->session = $fdate[11];

                            if (empty($fdate[14])) {
                                $csv->machine = $fdate[15];
                            } elseif (empty($fdate[15])) {
                                $csv->machine = $fdate[14];
                            }

                            $csv->created_by = Auth::user()->id;

                            $csv->save();
                        }

                    }
                }

            }

            $file->move(base_path('public/attendance_sheets'), $file->getClientOriginalName());
            $contents = File::get(base_path('public\attendance_sheets\\' . $name));

        }

    }

刀片

  <div class="page-content" ng-controller="uploadAttendanceSheetCtrl">
    <div class="col-md-offset-3 col-md-9">
        <button type="button"  ng-click = "uploadFile()" id="test" class="btn medium blue" disabled>Upload</button>
    </div>
  </div>

Angular js

app.service('fileUpload', ['$http', 'toaster', function ($http, toaster) {

    this.uploadFileToUrl = function (file, uploadUrl) {

            /*toaster.pop('wait', "Uploading");*/

            var fd = new FormData();
            fd.append('file', file);
            return $http.post(uploadUrl, fd, {
                transformRequest: angular.identity,
                headers: {'Content-Type': undefined}
            })
                    .success(function () {
                        toaster.clear();
                        toaster.pop('info', "Notificaton", "Attendance Sheet is uploaded successfully", 4000, 'trustedHtml');
                    })
                    .error(function () {
                    });
        }
    }]);

app.controller('uploadAttendanceSheetCtrl', ['$scope', '$http', 'fileUpload', 'toaster', function ($scope, $http, fileUpload, toaster) {
        $scope.loadUploadedFiles = function () {
            //var year = new Date().getFullYear();
            $http({
                method: "GET",
                url: "/attendance/loadUploadedFiles",
                headers: {
                    'X-CSRF-TOKEN': $('meta[name="csrf-token"]').attr('content')
                },
            }).then(function successCallback(response) {
                $scope.uploadedFiles = response.data;

            }, function errorCallback(response) {
            });
        };

        $scope.loadUploadedFiles();


        $scope.uploadFile = function () {

            var file = $scope.attendanceSheet;
            var uploadUrl = "/attendance/uploadAttendanceFile";


            fileUpload.uploadFileToUrl(file, uploadUrl).then(function () {
                $scope.loadUploadedFiles();
            });
        };
}]);