json - DioError [DioErrorType.RESPONSE] : Http status error [500], 为什么？

Question

我是 Flutter 的新手，我在我的项目中使用 Dio 使成员(member)注册功能..但是每次我执行注册过程时，调试控制台都会给我这个错误

I/flutter (13428): Instance of 'FormData'
I/flutter (13428): DioError [DioErrorType.RESPONSE]: Http status error [500]

然而，当我尝试向 POSTMAN 注册时，却成功了。所以我不确定问题出在哪里..这是我的代码，你们能帮帮我吗？我已经坚持了几个星期了..

final String url = "https://api.censored.org/api/members/register";

Dio.FormData formData = Dio.FormData.fromMap({
  "nama_lengkap": name,
  "tempat_lahir": tempatlahir,
  "tanggal_lahir": selectedDate.toString(),
  "email": email,
  "password": password,
  "username": username,
  "nomor_ktp": noKTP,
  "alamat_ktp": alamatktpmember,
  "alamat_domisili": alamatmember,
  "pekerjaan": pekerjaanmember,
  "alamat_pekerjaan": alamatperusahaanmember,
  "no_whatsapp": noWAmember,
  "no_hp": noteleponmember,
  "nama_pemilik_rekening": namarekmember,
  "nomor_rekening": norekmember,
  "bank_id": _valBank,
  "aggrement": _eulargprogramming,

  //Foto
  "foto_ktp": await Dio.MultipartFile.fromFile(_fotoKtp.path),
  "selfie_dengan_ktp": await Dio.MultipartFile.fromFile(_fotoSelfie.path),
  "foto_kk": await Dio.MultipartFile.fromFile(_fotoKK.path),
  "foto_pengenal_lainnya":
      await Dio.MultipartFile.fromFile(_fotoKartu.path),
  "foto_buku_rekening":
      await Dio.MultipartFile.fromFile(_fotoRekening.path),
  "foto_profil": await Dio.MultipartFile.fromFile(_fotoSelfie.path),

  //Array
  "penjamin": {
    "stakeholder_id": _subrgProgramming1,
    "nama": penjaminNama,
    "nomor_ktp": penjaminNoktp,
    "alamat_ktp": penjaminAlamat,
    "alamat_domisili": penjaminDomisili,
    "no_hp": notelppenjamin,
  },
  "sosial_media": [
    {
      "sosial_media_id": _sosmedrgprogramming,
      "nama": sosialmediamember,
      "screenshot": await Dio.MultipartFile.fromFile(_fotoSosmed.path),
    }
  ],
  "saudara_kerabat": [
    {
      "stakeholder_id": 4,
      "nama": namasaudara,
      "no_hp": notelpsaudara,
    },
    {
      "stakeholder_id": 5,
      "nama": namakerabat1,
      "no_hp": notelpkerabat1,
    },
    {
      "stakeholder_id": 5,
      "nama": namakerabat2,
      "no_hp": notelpkerabat2,
    },
    {
      "stakeholder_id": 5,
      "nama": namakerabat3,
      "no_hp": notelpkerabat3,
    }
  ],
});
print(formData);
var res;
try {
  Dio.Dio doo = Dio.Dio();
  doo.options.headers['Accept'] = 'application/json';
  doo.options.contentType = 'application/json';
  doo.options.followRedirects = false;
  Dio.Response response = await doo.post(url, data: formData);

  if (response.statusCode == 200) {
    print(response.data);
    res = response;
    final data = jsonDecode(res.body);
    print(res);

    int regvalue = data['value'];
    String message = data['message'];
    if (regvalue == 1) {
      setState(() {
        Navigator.pop(context);
      });
      print(message);
      registerToast(message);
    } else if (regvalue == 2) {
      print(message);
      registerToast(message);
    } else {
      print(message);
      registerToast(message);
    }
  }
} on Dio.DioError catch (e) {
  if (e.response.statusCode == 422) {
    print(e.response.data);
  }
} on Dio.DioError catch (e) {
  if (e.response.statusCode == 500) {
    print(e.response.data);
  }
}


}

  registerToast(String toast) {
    return Fluttertoast.showToast(
        msg: toast,
        toastLength: Toast.LENGTH_SHORT,
        gravity: ToastGravity.BOTTOM,
        timeInSecForIos: 1,
        backgroundColor: Colors.red,
        textColor: Colors.white);
  }

Answer 1

这意味着您的服务器以 InternalServerError 响应，但 dio 将此视为异常以解决此问题，或者使用 try and catch blocs 或将其传递给您的 dio instace

 final res = await dio.delete(
          url,
          data: postData,
          options: Options(

            followRedirects: false,
            // will not throw errors
            validateStatus: (status) => true,
            headers: headers,
          ),
        );