解决上传图片出现 undefined 的错误

Route::post('upload_image', 'TopicsController@uploadImage')->name('topics.upload_image');
原因是路由写错
控制器： public function uploadImage(Request $request, ImageUploadHandler $uploader)
{
// 初始化返回数据，默认是失败的
$data = [
'success' => false,
'msg' => '上传失败!',
'file_path' => ''
];
// 判断是否有上传文件，并赋值给 $file
if ($file = $request->upload_file) {
// 保存图片到本地
$result = $uploader->save($request->upload_file, 'topics', \Auth::id(), 1024);
// 图片保存成功的话
if ($result) {
$data['file_path'] = $result['path'];
$data['msg'] = "上传成功!";
$data['success'] = true;
}
}
return $data;
}