Php 上传时，Laravel文件名未正确保存在数据库中

我想上传并保存文件，如果请求有化身字段。但是，当我上传时，该文件正以生成的文件名在digital ocean spaces中正确上传。但在我的数据库中，它的保存方式是-C:\Users\debar\AppData\Local\Temp\php29DC.tmp

        $validator = Validator::make($request->all(), [
            'name' => 'string',
            'mobile' => 'numeric|nullable',
            'email' => 'email|nullable',
            'bio' => 'string|nullable',
            'school' => 'string|nullable',
            'college' => 'string|nullable',
            'country_id' => 'integer|nullable',
            'state_id' => 'integer|nullable',
            'city_id' => 'integer|nullable',
            'avatar' => 'file|nullable'
        ]);

        if($validator->fails()) {
            $errors = ['validation_error' => $validator->errors()];
            return response()->json($errors, 400);
        }

        if($request->has('avatar')){            
            $extension = $request->file('avatar')->extension();
            $mimeType = $request->file('avatar')->getMimeType();
            $fileName = time().'.'.$extension;
            
            Storage::disk('do_spaces')->putFileAs('doctor-profile', $request->file('avatar'), $fileName);

            $request->avatar = $fileName;

        }

        $doctor = Auth::guard('doctor_api')->user();

        $doctor->update($request->all());

        return $doctor;

当我dd（$request->avatar）时

---

当您在digital ocean space中保存文件时，您正在创建一个新文件名“$fileName”，而在数据库中更新时，您已将您的请求参数置于数据库中更新之前更改您的请求参数，并将您的新文件名置于数据库中。我尝试如下操作-$request->merge（['avatar'=>'abc']）；但是仍然不起作用添加$request在

更新

方法之前添加此行：

$request->merge（['avatar'=>$fileName？？NULL]）avatar）
Illuminate\Http\UploadedFile {#380
  -test: false
  -originalName: "dummy-girl.jpg"
  -mimeType: "image/jpeg"
  -error: 0
  #hashName: null
  path: "C:\Users\debar\AppData\Local\Temp"
  filename: "phpCD78.tmp"
  basename: "phpCD78.tmp"
  pathname: "C:\Users\debar\AppData\Local\Temp\phpCD78.tmp"
  extension: "tmp"
  realPath: "C:\Users\debar\AppData\Local\Temp\phpCD78.tmp"
  aTime: 2020-10-16 15:45:08
  mTime: 2020-10-16 15:45:08
  cTime: 2020-10-16 15:45:08
  inode: 19140298416425963
  size: 10227
  perms: 0100666
  owner: 0
  group: 0
  type: "file"
  writable: true
  readable: true
  executable: false
  file: true
  dir: false
  link: false
  linkTarget: "C:\Users\debar\AppData\Local\Temp\phpCD78.tmp"
}