[BUG] I can't send list of strings

[michaldev]

I have problem with sending my list of strings to my server. I got an error:
type '_InternalLinkedHashMap<String, dynamic>' is not a subtype of type 'String'

This is my code:

  @override
  Future<void> addPost(
      {String name, List<int> bytesFile, List<String> tags}) async {
    final data = FormData.fromMap({
      'file':
          await MultipartFile.fromBytes(bytesFile, filename: '${name}.bin'),
      'tags': tags,
      'name': name
    });
    await dio
        .post('$host/api/post',
            data: data,
            options: Options(headers: {'client-secret': clientSecret}))
        .catchError((onError) {
      throw CustomException(onError.error, onError.response.data);
    });
  }

Platform name: Flutter (Android)
Platform version: latest stable
Dio version: 3.0.10

[michaldev]

It looks like this: #633

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. If this is still an issue, please make sure it is up to date and if so, add a comment that this is still an issue to keep it open. Thank you for your contributions.

[abdalazeez1]

when i encode list like this
data['json_key'] = json.encode(listOfInt);///or something else String .....
now can send list
MapEntry(json_key: [1])

[patana93]

In my case using json_serializable lib. I have resolved like this:

final jsonFile = MyModel.toJson();
    jsonFile['my_list_obj_field_on_db'] = json.encode(jsonFile["my_list_obj_field_on_db"]);
   
 final data = FormData.fromMap(jsonFile);

    final Response<Map<String, dynamic>> response;
    try {
      response = await _dio.post(path, data: data);
    } catch (err) {
    ... //other code