Flutter GetX List

Question

I use the getx package in Flutter. I want to authorize the operations that the user can access or perform in the mobile application while logging in to the login page. For this reason, I am sending a list called Permission with Json Web Token. I save this list in the list named _maincontroller.perms that I created during the authentication process. Then, before routing in the same class, I pull the list named _maincontroller.perms and when I print, the data appears in the debug console. When it comes to the main screen, I have a sidebar. In this sidebar, the fields that will appear will be seen according to the authority. For this reason, I need to use the authorizations saved in _maincontroller.perms in the sidebar, but when I print _maincontroller.perms in my sidebar widget, it appears empty.

This is my MainController;

// ignore_for_file: non_constant_identifier_names

import 'package:get/get.dart';

class MainController extends GetxController {
  late List<dynamic> perms = <dynamic>[].obs;

  final String apiUrl = "http://10.0.2.2:8000/api";
  var token = "".obs;
  var userid = "".obs;
  var name = "".obs;
  var surname = "".obs;
  var isLogged = false.obs;
  var isSuccess = false.obs;
}

this is my auth_controller

// ignore_for_file: avoid_print, use_build_context_synchronously

import 'dart:convert';
import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:http/http.dart' as http;
import 'package:material_tracking/Controllers/main_controller.dart';
import 'package:material_tracking/Services/GetToken.dart';
import 'package:jwt_decoder/jwt_decoder.dart';

class AuthController {
  MainController _mainController = MainController();
  Future loginUser(String email, String password, BuildContext context) async {
    try {
      final _url = _mainController.apiUrl + '/Auth/Login';
      var response = await http.post(
        Uri.parse(_url),
        headers: <String, String>{
          'Content-Type': 'application/json; charset=UTF-8',
        },
        body: jsonEncode({"email": email, "password": password}),
      );

      if (response.statusCode == 200) {
        GetToken result = getTokenFromJson(response.body);
        Map<String, dynamic> decodedJwtToken =
            JwtDecoder.decode(result.data.accessToken);

        if (result.isSuccessful == true) {
          _mainController.token = result.data.accessToken.obs;
          _mainController.isSuccess = result.isSuccessful.obs;
          _mainController.perms = decodedJwtToken["Permission"];
          print(_mainController.perms); 
          if (_mainController.isSuccess == true) {
            Navigator.pushNamed(context, "/dashboard");
          } else {
            print("Hata");
          }
        } else {
          print(result.error);
        }
      } else {
        print("Login Error");
      }
    } catch (e) {
      print("Exception: $e");
    }
  }
}

This is sidebarnavigation widget

var permissionList = [];
final MainController mainController = Get.find();

late List<dynamic> perms;

class _SideBarNavigationDrawerState extends State<SideBarNavigationDrawer> {
  @override
  void initState() {
    super.initState();

    perms = mainController.perms;
    if (kDebugMode) {
      print(perms);
    }
  }

This is model.

// To parse this JSON data, do
//
//     final getDecodedJwt = getDecodedJwtFromJson(jsonString);

import 'dart:convert';

GetDecodedJwt getDecodedJwtFromJson(String str) =>
    GetDecodedJwt.fromJson(json.decode(str));

String getDecodedJwtToJson(GetDecodedJwt data) => json.encode(data.toJson());

class GetDecodedJwt {
  String httpSchemasXmlsoapOrgWs200505IdentityClaimsNameidentifier;
  String userId;
  String email;
  String httpSchemasXmlsoapOrgWs200505IdentityClaimsName;
  String name;
  String surname;
  String domainId;
  String fullName;
  String googleMapApi;
  String jti;
  List<String> permission;
  String aud;
  int nbf;
  int exp;
  String iss;

  GetDecodedJwt({
    required this.httpSchemasXmlsoapOrgWs200505IdentityClaimsNameidentifier,
    required this.userId,
    required this.email,
    required this.httpSchemasXmlsoapOrgWs200505IdentityClaimsName,
    required this.name,
    required this.surname,
    required this.domainId,
    required this.fullName,
    required this.googleMapApi,
    required this.jti,
    required this.permission,
    required this.aud,
    required this.nbf,
    required this.exp,
    required this.iss,
  });

  factory GetDecodedJwt.fromJson(Map<String, dynamic> json) => GetDecodedJwt(
        httpSchemasXmlsoapOrgWs200505IdentityClaimsNameidentifier: json[
            "http://schemas.xmlsoap.org/ws/2005/05/identity/claims/nameidentifier"],
        userId: json["UserId"],
        email: json["email"],
        httpSchemasXmlsoapOrgWs200505IdentityClaimsName:
            json["http://schemas.xmlsoap.org/ws/2005/05/identity/claims/name"],
        name: json["Name"],
        surname: json["Surname"],
        domainId: json["DomainId"],
        fullName: json["FullName"],
        googleMapApi: json["GoogleMapApi"],
        jti: json["jti"],
        permission: List<String>.from(json["Permission"].map((x) => x)),
        aud: json["aud"],
        nbf: json["nbf"],
        exp: json["exp"],
        iss: json["iss"],
      );

  Map<String, dynamic> toJson() => {
        "http://schemas.xmlsoap.org/ws/2005/05/identity/claims/nameidentifier":
            httpSchemasXmlsoapOrgWs200505IdentityClaimsNameidentifier,
        "UserId": userId,
        "email": email,
        "http://schemas.xmlsoap.org/ws/2005/05/identity/claims/name":
            httpSchemasXmlsoapOrgWs200505IdentityClaimsName,
        "Name": name,
        "Surname": surname,
        "DomainId": domainId,
        "FullName": fullName,
        "GoogleMapApi": googleMapApi,
        "jti": jti,
        "Permission": List<dynamic>.from(permission.map((x) => x)),
        "aud": aud,
        "nbf": nbf,
        "exp": exp,
        "iss": iss,
      };
}

i tryed like this in AuthController print(_mainController.perms); working well in SideBarWidget print(perms); empty result

Answer 1

It's hard to see without seeing the full project but it looks like the problem might be that you are doing

MainController _mainController = MainController();

inside the AuthController. This means that it has it's very own maincontroller that is in no way linked to the mainController in other parts of the app. You might want to do

MainController _mainController = Get.find();

instead, but again it's hard to judge without seeing the full picture