未处理的异常：类型 '_InternalLinkedHashMap<string, dynamic> ' 不是类型 'List 的子类型<dynamic> '</dynamic></string,>

Question

I try to fetch data from apis to my Flutter app and i get this error. I want to display some things in my home page with my getDashboardItems function after i log in.

network.dart

Future<List> getDashboardItems() async {
    SharedPreferences prefs = await SharedPreferences.getInstance();
    var accessToken = "Token ${prefs.getString("accessToken")!}";
    final response = await get(
      Uri.parse('$baseUrlApi/employee-api/dashboard/'),
      headers: <String, String>{
        'Content-Type': 'application/json; charset=UTF-8',
        'Authorization': accessToken,
      },
    );

repository.dart

Future<List> getDashboardItem() async {
    final signUpData = await networkService.getDashboardItems();
    if (signUpData[0] == true) {
      try {
        return [true, signUpData[1]];
      } catch (e) {
        return [false, []];
      }
    }
    return [false, signUpData[1]];
  }

homecontroller.dart

getDashboardItem(context) {
    isLoading.value = true;
    repository.getDashboardItem().then((res) {
      if (res[0] == true) {
        isLoading.value = false;
        getDashboardResponse.value = res[1];
      } else if (res[1]['detail'] == 'Invalid token.' ||
          res[1]['detail'] == 'Authentication credentials were not provided') {
        Get.snackbar('Error', 'Your session is out, Please login again',
            snackPosition: SnackPosition.TOP);
        logout(context);
      } else {
        isLoading.value = false;
        Get.snackbar('Error', res[1]['parameter error'],
            snackPosition: SnackPosition.TOP);
      }
    });
  }

When I get this error it sends my on the line

        getDashboardResponse.value = res[1];
 

from homecontroller.

Answer 1

Its because you are trying to do this for example {"data":[]}(ie) this is your response data so res[1] is not possible to get a better understandment of what you are trying to best is it possible to share the response you are getting from the api